bambuddy/backend/app/api/routes/archives.py

import io
import json
import logging
import zipfile
from collections import defaultdict
from datetime import date, datetime, time, timezone
from decimal import ROUND_HALF_UP, Decimal
from pathlib import Path

from fastapi import APIRouter, Depends, File, Form, HTTPException, Query, Request, UploadFile
from fastapi.responses import FileResponse, Response
from sqlalchemy import and_, func, or_, select
from sqlalchemy.ext.asyncio import AsyncSession

from backend.app.core.auth import (
    RequireCameraStreamTokenIfAuthEnabled,
    RequirePermissionIfAuthEnabled,
    require_ownership_permission,
)
from backend.app.core.config import settings
from backend.app.core.database import get_db
from backend.app.core.permissions import Permission
from backend.app.models.archive import PrintArchive
from backend.app.models.filament import Filament
from backend.app.models.spool_usage_history import SpoolUsageHistory
from backend.app.models.user import User
from backend.app.schemas.archive import ArchiveResponse, ArchiveSlim, ArchiveStats, ArchiveUpdate, ReprintRequest
from backend.app.services.archive import ArchiveService
from backend.app.utils.threemf_tools import extract_nozzle_mapping_from_3mf

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/archives", tags=["archives"])


def _validate_user_filter_permission(current_user: User | None, created_by_id: int | None):
    """Raise 403 if created_by_id filter is used without stats:filter_by_user permission."""
    if created_by_id is None or current_user is None:
        return
    if current_user.is_admin:
        return
    if not current_user.has_permission(Permission.STATS_FILTER_BY_USER.value):
        raise HTTPException(status_code=403, detail="Permission stats:filter_by_user required")


def _apply_user_filter(conditions: list, created_by_id: int | None):
    """Append created_by_id filter to conditions list if specified."""
    if created_by_id is not None:
        if created_by_id == -1:
            conditions.append(PrintArchive.created_by_id.is_(None))
        else:
            conditions.append(PrintArchive.created_by_id == created_by_id)


def compute_time_accuracy(archive: PrintArchive) -> dict:
    """Compute actual print time and accuracy for an archive.

    Returns dict with actual_time_seconds and time_accuracy.
    time_accuracy = (estimated / actual) * 100
    - 100% = perfect estimate
    - >100% = print was faster than estimated
    - <100% = print took longer than estimated
    """
    result = {"actual_time_seconds": None, "time_accuracy": None}

    if archive.started_at and archive.completed_at and archive.status == "completed":
        actual_seconds = int((archive.completed_at - archive.started_at).total_seconds())
        if actual_seconds > 0:
            result["actual_time_seconds"] = actual_seconds

            if archive.print_time_seconds and archive.print_time_seconds > 0:
                # Calculate accuracy as percentage
                accuracy = (archive.print_time_seconds / actual_seconds) * 100
                # Sanity check: skip unreasonable values (e.g., manually changed status)
                # Valid range: 5% to 500% (print took 20x longer to 5x faster than estimated)
                if 5 <= accuracy <= 500:
                    result["time_accuracy"] = round(accuracy, 1)

    return result


def archive_to_response(
    archive: PrintArchive,
    duplicates: list[dict] | None = None,
    duplicate_count: int = 0,
    duplicate_sequence: int = 0,
    original_archive_id: int | None = None,
) -> dict:
    """Convert archive model to response dict with computed fields."""
    data = {
        "id": archive.id,
        "printer_id": archive.printer_id,
        "project_id": archive.project_id,
        "project_name": archive.project.name if archive.project else None,
        "filename": archive.filename,
        "file_path": archive.file_path,
        "file_size": archive.file_size,
        "content_hash": archive.content_hash,
        "thumbnail_path": archive.thumbnail_path,
        "timelapse_path": archive.timelapse_path,
        "source_3mf_path": archive.source_3mf_path,
        "f3d_path": archive.f3d_path,
        "duplicates": duplicates,
        "duplicate_count": duplicate_count if duplicates is None else len(duplicates),
        "duplicate_sequence": duplicate_sequence,
        "original_archive_id": original_archive_id,
        "print_name": archive.print_name,
        "print_time_seconds": archive.print_time_seconds,
        "filament_used_grams": archive.filament_used_grams,
        "filament_type": archive.filament_type,
        "filament_color": archive.filament_color,
        "layer_height": archive.layer_height,
        "total_layers": archive.total_layers,
        "nozzle_diameter": archive.nozzle_diameter,
        "bed_temperature": archive.bed_temperature,
        "nozzle_temperature": archive.nozzle_temperature,
        "sliced_for_model": archive.sliced_for_model,
        "status": archive.status,
        "started_at": archive.started_at,
        "completed_at": archive.completed_at,
        "extra_data": archive.extra_data,
        "makerworld_url": archive.makerworld_url,
        "designer": archive.designer,
        "external_url": archive.external_url,
        "is_favorite": archive.is_favorite,
        "tags": archive.tags,
        "notes": archive.notes,
        "cost": archive.cost,
        "photos": archive.photos,
        "failure_reason": archive.failure_reason,
        "quantity": archive.quantity,
        "energy_kwh": archive.energy_kwh,
        "energy_cost": archive.energy_cost,
        "created_at": archive.created_at,
        # User tracking (Issue #206)
        "created_by_id": archive.created_by_id,
        "created_by_username": archive.created_by.username if archive.created_by else None,
    }

    # Add computed time accuracy fields
    accuracy_data = compute_time_accuracy(archive)
    data.update(accuracy_data)

    return data


@router.get("/", response_model=list[ArchiveResponse])
async def list_archives(
    printer_id: int | None = None,
    project_id: int | None = None,
    date_from: date | None = Query(None),
    date_to: date | None = Query(None),
    limit: int = 50,
    offset: int = 0,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """List archived prints."""
    service = ArchiveService(db)
    archives = await service.list_archives(
        printer_id=printer_id,
        project_id=project_id,
        date_from=date_from,
        date_to=date_to,
        limit=limit,
        offset=offset,
    )

    # Get sets of duplicate hashes and duplicate (name, hash) pairs (efficient single queries)
    duplicate_hashes, duplicate_name_hash_pairs = await service.get_duplicate_hashes_and_names()

    # Batch-load duplicate groups once for the current page keys.
    duplicate_hashes_in_page = {
        a.content_hash for a in archives if a.content_hash and a.content_hash in duplicate_hashes
    }
    duplicate_name_hash_keys_in_page = {
        (a.print_name.lower(), a.content_hash)
        for a in archives
        if a.print_name and a.content_hash and (a.print_name.lower(), a.content_hash) in duplicate_name_hash_pairs
    }

    duplicate_meta_by_archive_id: dict[int, tuple[int, int, int]] = {}

    if duplicate_hashes_in_page or duplicate_name_hash_keys_in_page:
        duplicate_group_conditions = []
        if duplicate_hashes_in_page:
            duplicate_group_conditions.append(PrintArchive.content_hash.in_(duplicate_hashes_in_page))
        if duplicate_name_hash_keys_in_page:
            name_hash_conditions = [
                and_(func.lower(PrintArchive.print_name) == name, PrintArchive.content_hash == hash_)
                for name, hash_ in duplicate_name_hash_keys_in_page
            ]
            duplicate_group_conditions.extend(name_hash_conditions)

        duplicate_group_rows = await db.execute(
            select(
                PrintArchive.id,
                PrintArchive.created_at,
                PrintArchive.content_hash,
                func.lower(PrintArchive.print_name).label("print_name_lower"),
            ).where(or_(*duplicate_group_conditions))
        )

        duplicate_groups_by_hash: dict[str, list[tuple[int, datetime]]] = defaultdict(list)
        duplicate_groups_by_name_hash: dict[tuple[str, str], list[tuple[int, datetime]]] = defaultdict(list)

        for archive_id, created_at, content_hash, print_name_lower in duplicate_group_rows.all():
            if content_hash and content_hash in duplicate_hashes_in_page:
                duplicate_groups_by_hash[content_hash].append((archive_id, created_at))
            if (
                print_name_lower
                and content_hash
                and (print_name_lower, content_hash) in duplicate_name_hash_keys_in_page
            ):
                duplicate_groups_by_name_hash[(print_name_lower, content_hash)].append((archive_id, created_at))

        for group in duplicate_groups_by_hash.values():
            if len(group) < 2:
                continue
            group.sort(key=lambda x: x[1])
            original_id = group[0][0]
            duplicate_count = len(group) - 1
            for sequence, (archive_id, _) in enumerate(group):
                duplicate_meta_by_archive_id[archive_id] = (sequence, original_id, duplicate_count)

        # Keep hash-based grouping precedence; name/hash groups only fill missing items.
        for group in duplicate_groups_by_name_hash.values():
            if len(group) < 2:
                continue
            group.sort(key=lambda x: x[1])
            original_id = group[0][0]
            duplicate_count = len(group) - 1
            for sequence, (archive_id, _) in enumerate(group):
                duplicate_meta_by_archive_id.setdefault(archive_id, (sequence, original_id, duplicate_count))

    # Build response with duplicate sequence and original archive ID pre-computed
    result = []
    for a in archives:
        has_hash_dup = a.content_hash in duplicate_hashes if a.content_hash else False
        has_name_dup = (
            bool(a.print_name and a.content_hash)
            and (a.print_name.lower(), a.content_hash) in duplicate_name_hash_pairs
        )
        has_duplicate = has_hash_dup or has_name_dup

        # Pre-compute duplicate sequence and original archive ID
        duplicate_sequence = 0
        original_archive_id: int | None = None
        duplicate_count = 1 if has_duplicate else 0

        if has_duplicate and a.id in duplicate_meta_by_archive_id:
            duplicate_sequence, original_archive_id, duplicate_count = duplicate_meta_by_archive_id[a.id]

        result.append(
            archive_to_response(
                a,
                duplicate_count=duplicate_count,
                duplicate_sequence=duplicate_sequence,
                original_archive_id=original_archive_id,
            )
        )
    return result


@router.get("/slim", response_model=list[ArchiveSlim])
async def list_archives_slim(
    date_from: date | None = Query(None),
    date_to: date | None = Query(None),
    created_by_id: int | None = Query(None, description="Filter by user who created the print (-1 for no user)"),
    limit: int = Query(default=10000, le=50000),
    offset: int = 0,
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Lightweight archive listing for stats/dashboard widgets.

    Returns only the fields needed for client-side aggregation,
    skipping duplicate detection, file paths, and extra_data.
    """
    _validate_user_filter_permission(current_user, created_by_id)
    filters = []
    if date_from:
        dt_from = datetime.combine(date_from, time.min, tzinfo=timezone.utc)
        filters.append(PrintArchive.created_at >= dt_from)
    if date_to:
        dt_to = datetime.combine(date_to, time.max, tzinfo=timezone.utc)
        filters.append(PrintArchive.created_at <= dt_to)
    _apply_user_filter(filters, created_by_id)

    query = (
        select(
            PrintArchive.printer_id,
            PrintArchive.print_name,
            PrintArchive.print_time_seconds,
            PrintArchive.started_at,
            PrintArchive.completed_at,
            PrintArchive.filament_used_grams,
            PrintArchive.filament_type,
            PrintArchive.filament_color,
            PrintArchive.status,
            PrintArchive.cost,
            PrintArchive.quantity,
            PrintArchive.created_at,
        )
        .where(*filters)
        .order_by(PrintArchive.created_at.desc())
        .limit(limit)
        .offset(offset)
    )
    result = await db.execute(query)
    rows = result.all()

    return [
        {
            "printer_id": r.printer_id,
            "print_name": r.print_name,
            "print_time_seconds": r.print_time_seconds,
            "actual_time_seconds": (
                int((r.completed_at - r.started_at).total_seconds())
                if r.started_at
                and r.completed_at
                and r.status == "completed"
                and (r.completed_at - r.started_at).total_seconds() > 0
                else None
            ),
            "filament_used_grams": r.filament_used_grams,
            "filament_type": r.filament_type,
            "filament_color": r.filament_color,
            "status": r.status,
            "started_at": r.started_at,
            "completed_at": r.completed_at,
            "cost": r.cost,
            "quantity": r.quantity,
            "created_at": r.created_at,
        }
        for r in rows
    ]


@router.get("/search", response_model=list[ArchiveResponse])
async def search_archives(
    q: str = Query(..., min_length=2, description="Search query"),
    printer_id: int | None = None,
    project_id: int | None = None,
    status: str | None = None,
    limit: int = 50,
    offset: int = 0,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Full-text search across archives.

    Searches print_name, filename, tags, notes, designer, and filament_type fields.
    Supports partial matches with wildcards (e.g., 'vor*' matches 'voron').
    """
    from sqlalchemy import text
    from sqlalchemy.orm import selectinload

    # Prepare search query - add wildcard for partial matches
    search_term = q.strip()
    if not search_term.endswith("*"):
        search_term = f"{search_term}*"

    # Build the FTS query
    # Using MATCH for FTS5 full-text search
    fts_query = text("""
        SELECT rowid FROM archive_fts
        WHERE archive_fts MATCH :search_term
        ORDER BY rank
        LIMIT :limit OFFSET :offset
    """)

    try:
        result = await db.execute(fts_query, {"search_term": search_term, "limit": limit + 100, "offset": 0})
        matched_ids = [row[0] for row in result.fetchall()]
    except Exception as e:
        logger.warning("FTS search failed, falling back to LIKE search: %s", e)
        # Fallback to LIKE search if FTS fails
        like_pattern = f"%{q}%"
        query = (
            select(PrintArchive)
            .options(selectinload(PrintArchive.project))
            .where(
                (PrintArchive.print_name.ilike(like_pattern))
                | (PrintArchive.filename.ilike(like_pattern))
                | (PrintArchive.tags.ilike(like_pattern))
                | (PrintArchive.notes.ilike(like_pattern))
                | (PrintArchive.designer.ilike(like_pattern))
                | (PrintArchive.filament_type.ilike(like_pattern))
            )
            .order_by(PrintArchive.created_at.desc())
        )

        if printer_id:
            query = query.where(PrintArchive.printer_id == printer_id)
        if project_id:
            query = query.where(PrintArchive.project_id == project_id)
        if status:
            query = query.where(PrintArchive.status == status)

        query = query.limit(limit).offset(offset)
        result = await db.execute(query)
        archives = result.scalars().all()
        return [archive_to_response(a) for a in archives]

    if not matched_ids:
        return []

    # Fetch full archive records for matched IDs
    query = select(PrintArchive).options(selectinload(PrintArchive.project)).where(PrintArchive.id.in_(matched_ids))

    # Apply additional filters
    if printer_id:
        query = query.where(PrintArchive.printer_id == printer_id)
    if project_id:
        query = query.where(PrintArchive.project_id == project_id)
    if status:
        query = query.where(PrintArchive.status == status)

    result = await db.execute(query)
    archives_dict = {a.id: a for a in result.scalars().all()}

    # Preserve FTS ranking order and apply pagination
    ordered_archives = [archives_dict[id] for id in matched_ids if id in archives_dict]
    paginated = ordered_archives[offset : offset + limit]

    return [archive_to_response(a) for a in paginated]


@router.post("/search/rebuild-index")
async def rebuild_search_index(
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Rebuild the full-text search index from existing archives.

    Use this if search results seem incomplete or incorrect.
    """
    from sqlalchemy import text

    try:
        # Clear and rebuild the FTS index
        await db.execute(text("DELETE FROM archive_fts"))

        # Repopulate from print_archives
        await db.execute(
            text("""
            INSERT INTO archive_fts(rowid, print_name, filename, tags, notes, designer, filament_type)
            SELECT id, print_name, filename, tags, notes, designer, filament_type
            FROM print_archives
        """)
        )

        await db.commit()

        # Count entries
        result = await db.execute(text("SELECT COUNT(*) FROM archive_fts"))
        count = result.scalar() or 0

        return {"message": f"Search index rebuilt with {count} entries"}
    except Exception as e:
        logger.error("Failed to rebuild search index: %s", e)
        raise HTTPException(status_code=500, detail=f"Failed to rebuild index: {str(e)}")


@router.get("/analysis/failures")
async def analyze_failures(
    days: int | None = None,
    date_from: date | None = Query(None),
    date_to: date | None = Query(None),
    printer_id: int | None = None,
    project_id: int | None = None,
    created_by_id: int | None = Query(None, description="Filter by user who created the print (-1 for no user)"),
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Analyze failure patterns across prints.

    Returns failure statistics including:
    - Overall failure rate
    - Failures by reason, filament type, printer
    - Time of day distribution
    - Recent failures
    - Weekly trend
    """
    _validate_user_filter_permission(current_user, created_by_id)

    from backend.app.services.failure_analysis import FailureAnalysisService

    service = FailureAnalysisService(db)
    return await service.analyze_failures(
        days=days,
        date_from=date_from,
        date_to=date_to,
        printer_id=printer_id,
        project_id=project_id,
        created_by_id=created_by_id,
    )


@router.get("/compare")
async def compare_archives(
    archive_ids: str = Query(..., description="Comma-separated archive IDs (2-5)"),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Compare multiple archives side by side.

    Compares print settings, filament usage, and print times.
    Also analyzes correlation between settings and success/failure.

    Args:
        archive_ids: Comma-separated list of 2-5 archive IDs to compare
    """
    from backend.app.services.archive_comparison import ArchiveComparisonService

    # Parse and validate archive IDs
    try:
        ids = [int(id.strip()) for id in archive_ids.split(",")]
    except ValueError:
        raise HTTPException(400, "Invalid archive IDs format")

    if len(ids) < 2:
        raise HTTPException(400, "At least 2 archives required for comparison")
    if len(ids) > 5:
        raise HTTPException(400, "Maximum 5 archives can be compared at once")

    service = ArchiveComparisonService(db)
    try:
        return await service.compare_archives(ids)
    except ValueError as e:
        raise HTTPException(400, str(e))


@router.get("/export")
async def export_archives(
    format: str = Query("csv", description="Export format: csv or xlsx"),
    fields: str | None = Query(None, description="Comma-separated field names"),
    printer_id: int | None = None,
    project_id: int | None = None,
    status: str | None = None,
    date_from: str | None = Query(None, description="Start date (ISO format)"),
    date_to: str | None = Query(None, description="End date (ISO format)"),
    search: str | None = None,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Export archives to CSV or Excel format.

    Returns a downloadable file with archive data.
    """
    from datetime import datetime

    from fastapi.responses import StreamingResponse

    from backend.app.services.export import ExportService

    if format not in ("csv", "xlsx"):
        raise HTTPException(400, "Format must be 'csv' or 'xlsx'")

    # Parse fields
    field_list = None
    if fields:
        field_list = [f.strip() for f in fields.split(",")]

    # Parse dates
    date_from_dt = None
    date_to_dt = None
    if date_from:
        try:
            date_from_dt = datetime.fromisoformat(date_from)
        except ValueError:
            raise HTTPException(400, "Invalid date_from format")
    if date_to:
        try:
            date_to_dt = datetime.fromisoformat(date_to)
        except ValueError:
            raise HTTPException(400, "Invalid date_to format")

    service = ExportService(db)
    try:
        file_bytes, filename, content_type = await service.export_archives(
            format=format,
            fields=field_list,
            printer_id=printer_id,
            project_id=project_id,
            status=status,
            date_from=date_from_dt,
            date_to=date_to_dt,
            search=search,
        )
    except ImportError as e:
        raise HTTPException(500, str(e))

    return StreamingResponse(
        io.BytesIO(file_bytes),
        media_type=content_type,
        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
    )


@router.get("/stats/export")
async def export_stats(
    format: str = Query("csv", description="Export format: csv or xlsx"),
    days: int = 30,
    printer_id: int | None = None,
    project_id: int | None = None,
    created_by_id: int | None = Query(None, description="Filter by user who created the print (-1 for no user)"),
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.STATS_READ),
):
    """Export statistics summary to CSV or Excel format."""
    _validate_user_filter_permission(current_user, created_by_id)

    from fastapi.responses import StreamingResponse

    from backend.app.services.export import ExportService

    if format not in ("csv", "xlsx"):
        raise HTTPException(400, "Format must be 'csv' or 'xlsx'")

    service = ExportService(db)
    try:
        file_bytes, filename, content_type = await service.export_stats(
            format=format,
            days=days,
            printer_id=printer_id,
            project_id=project_id,
            created_by_id=created_by_id,
        )
    except ImportError as e:
        raise HTTPException(500, str(e))

    return StreamingResponse(
        io.BytesIO(file_bytes),
        media_type=content_type,
        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
    )


@router.get("/stats", response_model=ArchiveStats)
async def get_archive_stats(
    date_from: date | None = Query(None, description="Start date (inclusive), YYYY-MM-DD"),
    date_to: date | None = Query(None, description="End date (inclusive), YYYY-MM-DD"),
    created_by_id: int | None = Query(None, description="Filter by user who created the print (-1 for no user)"),
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.STATS_READ),
):
    """Get statistics across all archives."""
    _validate_user_filter_permission(current_user, created_by_id)

    # Build date filter conditions
    base_conditions = []
    if date_from:
        dt_from = datetime.combine(date_from, time.min, tzinfo=timezone.utc)
        base_conditions.append(PrintArchive.created_at >= dt_from)
    if date_to:
        dt_to = datetime.combine(date_to, time.max, tzinfo=timezone.utc)
        base_conditions.append(PrintArchive.created_at <= dt_to)
    _apply_user_filter(base_conditions, created_by_id)

    # Total counts
    total_result = await db.execute(select(func.count(PrintArchive.id)).where(*base_conditions))
    total_prints = total_result.scalar() or 0

    successful_result = await db.execute(
        select(func.count(PrintArchive.id)).where(PrintArchive.status == "completed", *base_conditions)
    )
    successful_prints = successful_result.scalar() or 0

    failed_result = await db.execute(
        select(func.count(PrintArchive.id)).where(PrintArchive.status == "failed", *base_conditions)
    )
    failed_prints = failed_result.scalar() or 0

    # Totals - use actual print time from timestamps (not slicer estimates)
    # For archives with both started_at and completed_at, calculate actual duration
    # Fall back to print_time_seconds only for archives without timestamps
    archives_for_time = await db.execute(
        select(PrintArchive.started_at, PrintArchive.completed_at, PrintArchive.print_time_seconds).where(
            *base_conditions
        )
    )
    total_seconds = 0
    for started_at, completed_at, print_time_seconds in archives_for_time.all():
        if started_at and completed_at:
            # Use actual elapsed time
            actual_seconds = (completed_at - started_at).total_seconds()
            if actual_seconds > 0:
                total_seconds += actual_seconds
        elif print_time_seconds:
            # Fallback to estimate only if no timestamps
            total_seconds += print_time_seconds
    total_time = total_seconds / 3600  # Convert to hours

    # Sum filament directly - filament_used_grams already contains the total for the print job
    filament_result = await db.execute(
        select(func.coalesce(func.sum(PrintArchive.filament_used_grams), 0)).where(*base_conditions)
    )
    total_filament = filament_result.scalar() or 0

    cost_result = await db.execute(select(func.sum(PrintArchive.cost)).where(*base_conditions))
    total_cost = cost_result.scalar() or 0

    # By filament type (split comma-separated values for multi-material prints)
    filament_type_result = await db.execute(
        select(PrintArchive.filament_type).where(PrintArchive.filament_type.isnot(None), *base_conditions)
    )
    prints_by_filament: dict[str, int] = {}
    for (filament_types,) in filament_type_result.all():
        # Split by comma and count each type
        for ftype in filament_types.split(","):
            ftype = ftype.strip()
            if ftype:
                prints_by_filament[ftype] = prints_by_filament.get(ftype, 0) + 1

    # By printer
    printer_result = await db.execute(
        select(PrintArchive.printer_id, func.count(PrintArchive.id))
        .where(*base_conditions)
        .group_by(PrintArchive.printer_id)
    )
    prints_by_printer = {str(k): v for k, v in printer_result.all()}

    # Time accuracy statistics
    # Get all completed archives with both estimated and actual times
    accuracy_result = await db.execute(
        select(PrintArchive)
        .where(PrintArchive.status == "completed", *base_conditions)
        .where(PrintArchive.print_time_seconds.isnot(None))
        .where(PrintArchive.started_at.isnot(None))
        .where(PrintArchive.completed_at.isnot(None))
    )
    archives_with_times = list(accuracy_result.scalars().all())

    average_accuracy = None
    accuracy_by_printer: dict[str, float] = {}

    if archives_with_times:
        accuracies = []
        printer_accuracies: dict[str, list[float]] = {}

        for archive in archives_with_times:
            acc_data = compute_time_accuracy(archive)
            if acc_data["time_accuracy"] is not None:
                accuracies.append(acc_data["time_accuracy"])

                # Group by printer
                printer_key = str(archive.printer_id) if archive.printer_id else "unknown"
                if printer_key not in printer_accuracies:
                    printer_accuracies[printer_key] = []
                printer_accuracies[printer_key].append(acc_data["time_accuracy"])

        if accuracies:
            average_accuracy = round(sum(accuracies) / len(accuracies), 1)

        # Calculate per-printer averages
        for printer_key, accs in printer_accuracies.items():
            accuracy_by_printer[printer_key] = round(sum(accs) / len(accs), 1)

    # Energy totals - check which mode to use
    from backend.app.api.routes.settings import get_setting

    energy_tracking_mode = await get_setting(db, "energy_tracking_mode") or "total"
    energy_cost_per_kwh_str = await get_setting(db, "energy_cost_per_kwh")
    energy_cost_per_kwh = float(energy_cost_per_kwh_str) if energy_cost_per_kwh_str else 0.15

    # When date filters are active, smart plug lifetime totals can't be
    # filtered by date range — fall back to per-print archive data instead.
    if energy_tracking_mode == "total" and not date_from and not date_to:
        # Total mode: sum up 'total' counter from all smart plugs (lifetime consumption)
        from backend.app.models.smart_plug import SmartPlug
        from backend.app.services.homeassistant import homeassistant_service
        from backend.app.services.mqtt_relay import mqtt_relay
        from backend.app.services.tasmota import tasmota_service

        plugs_result = await db.execute(select(SmartPlug))
        plugs = list(plugs_result.scalars().all())

        # Configure HA service once (needed for homeassistant-type plugs)
        ha_url = await get_setting(db, "ha_url") or ""
        ha_token = await get_setting(db, "ha_token") or ""
        homeassistant_service.configure(ha_url, ha_token)

        total_energy_kwh = 0.0
        for plug in plugs:
            if plug.plug_type == "tasmota":
                energy = await tasmota_service.get_energy(plug)
                if energy and energy.get("total") is not None:
                    total_energy_kwh += energy["total"]
            elif plug.plug_type == "homeassistant":
                energy = await homeassistant_service.get_energy(plug)
                if energy and energy.get("total") is not None:
                    total_energy_kwh += energy["total"]
            elif plug.plug_type == "mqtt":
                # MQTT plugs report "today" energy, not lifetime total
                mqtt_data = mqtt_relay.smart_plug_service.get_plug_data(plug.id)
                if mqtt_data and mqtt_data.energy is not None:
                    total_energy_kwh += mqtt_data.energy

        total_energy_kwh = round(total_energy_kwh, 3)
        total_energy_cost = round(total_energy_kwh * energy_cost_per_kwh, 3)
    else:
        # Print mode: sum up per-print energy from archives
        energy_kwh_result = await db.execute(select(func.sum(PrintArchive.energy_kwh)).where(*base_conditions))
        total_energy_kwh = energy_kwh_result.scalar() or 0

        energy_cost_result = await db.execute(select(func.sum(PrintArchive.energy_cost)).where(*base_conditions))
        total_energy_cost = energy_cost_result.scalar() or 0

    return ArchiveStats(
        total_prints=total_prints,
        successful_prints=successful_prints,
        failed_prints=failed_prints,
        total_print_time_hours=round(total_time, 1),
        total_filament_grams=round(total_filament, 1),
        total_cost=round(total_cost, 2),
        prints_by_filament_type=prints_by_filament,
        prints_by_printer=prints_by_printer,
        average_time_accuracy=average_accuracy,
        time_accuracy_by_printer=accuracy_by_printer if accuracy_by_printer else None,
        total_energy_kwh=round(total_energy_kwh, 3),
        total_energy_cost=round(total_energy_cost, 3),
    )


@router.get("/tags")
async def get_all_tags(
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """List all unique tags with usage counts.

    Returns a list of tags sorted by count (descending), then by name.
    """
    # Query all archives with non-null tags
    result = await db.execute(select(PrintArchive.tags).where(PrintArchive.tags.isnot(None)))
    all_tags_rows = result.all()

    # Count occurrences of each tag
    tag_counts: dict[str, int] = {}
    for (tags_str,) in all_tags_rows:
        if tags_str:
            for tag in tags_str.split(","):
                tag = tag.strip()
                if tag:
                    tag_counts[tag] = tag_counts.get(tag, 0) + 1

    # Convert to list and sort by count (desc), then name (asc)
    tags_list = [{"name": name, "count": count} for name, count in tag_counts.items()]
    tags_list.sort(key=lambda x: (-x["count"], x["name"].lower()))

    return tags_list


@router.put("/tags/{tag_name}")
async def rename_tag(
    tag_name: str,
    request: Request,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Rename a tag across all archives.

    Request body should contain {"new_name": "new tag name"}.
    Returns the count of affected archives.
    """
    body = await request.json()
    new_name = body.get("new_name", "").strip()

    if not new_name:
        raise HTTPException(400, "new_name is required")

    if new_name == tag_name:
        return {"affected": 0}

    # Find all archives containing the old tag
    result = await db.execute(select(PrintArchive).where(PrintArchive.tags.isnot(None)))
    archives = list(result.scalars().all())

    affected = 0
    for archive in archives:
        if not archive.tags:
            continue
        tags = [t.strip() for t in archive.tags.split(",")]
        if tag_name in tags:
            # Replace old tag with new tag
            new_tags = [new_name if t == tag_name else t for t in tags]
            # Remove duplicates while preserving order
            seen = set()
            unique_tags = []
            for t in new_tags:
                if t not in seen:
                    seen.add(t)
                    unique_tags.append(t)
            archive.tags = ", ".join(unique_tags)
            affected += 1

    await db.commit()
    return {"affected": affected}


@router.delete("/tags/{tag_name}")
async def delete_tag(
    tag_name: str,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Delete a tag from all archives.

    Returns the count of affected archives.
    """
    # Find all archives containing the tag
    result = await db.execute(select(PrintArchive).where(PrintArchive.tags.isnot(None)))
    archives = list(result.scalars().all())

    affected = 0
    for archive in archives:
        if not archive.tags:
            continue
        tags = [t.strip() for t in archive.tags.split(",")]
        if tag_name in tags:
            # Remove the tag
            new_tags = [t for t in tags if t != tag_name]
            archive.tags = ", ".join(new_tags) if new_tags else None
            affected += 1

    await db.commit()
    return {"affected": affected}


@router.get("/{archive_id}", response_model=ArchiveResponse)
async def get_archive(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get a specific archive."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    # Find duplicates
    makerworld_id = archive.extra_data.get("makerworld_model_id") if archive.extra_data else None
    duplicates = await service.find_duplicates(
        archive_id=archive.id,
        content_hash=archive.content_hash,
        print_name=archive.print_name,
        makerworld_model_id=makerworld_id,
    )
    return archive_to_response(archive, duplicates)


@router.get("/{archive_id}/similar")
async def find_similar_archives(
    archive_id: int,
    limit: int = 10,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Find archives with similar settings for comparison.

    Returns archives that match by:
    - Same print name (highest priority)
    - Same file content hash
    - Same filament type
    """
    from backend.app.services.archive_comparison import ArchiveComparisonService

    service = ArchiveComparisonService(db)
    try:
        return await service.find_similar_archives(archive_id, limit=limit)
    except ValueError as e:
        raise HTTPException(404, str(e))


@router.patch("/{archive_id}", response_model=ArchiveResponse)
async def update_archive(
    archive_id: int,
    update_data: ArchiveUpdate,
    db: AsyncSession = Depends(get_db),
    auth_result: tuple[User | None, bool] = Depends(
        require_ownership_permission(
            Permission.ARCHIVES_UPDATE_ALL,
            Permission.ARCHIVES_UPDATE_OWN,
        )
    ),
):
    """Update archive metadata (tags, notes, cost, is_favorite, project_id)."""
    from sqlalchemy.orm import selectinload

    user, can_modify_all = auth_result

    result = await db.execute(
        select(PrintArchive)
        .options(selectinload(PrintArchive.project), selectinload(PrintArchive.created_by))
        .where(PrintArchive.id == archive_id)
    )
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    # Ownership check
    if not can_modify_all:
        if archive.created_by_id != user.id:
            raise HTTPException(403, "You can only update your own archives")

    for field, value in update_data.model_dump(exclude_unset=True).items():
        setattr(archive, field, value)

    await db.commit()

    # Re-fetch with relationships loaded after commit
    result = await db.execute(
        select(PrintArchive)
        .options(selectinload(PrintArchive.project), selectinload(PrintArchive.created_by))
        .where(PrintArchive.id == archive_id)
    )
    archive = result.scalar_one_or_none()

    return archive_to_response(archive)


@router.post("/{archive_id}/favorite", response_model=ArchiveResponse)
async def toggle_favorite(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_OWN),
):
    """Toggle favorite status for an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    archive.is_favorite = not archive.is_favorite
    await db.commit()
    await db.refresh(archive)
    return archive


@router.post("/{archive_id}/rescan", response_model=ArchiveResponse)
async def rescan_archive(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Rescan the 3MF file and update metadata."""
    from backend.app.api.routes.settings import get_setting
    from backend.app.services.archive import ThreeMFParser

    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    # Parse the 3MF file
    parser = ThreeMFParser(file_path)
    metadata = parser.parse()

    # Update fields from metadata
    if metadata.get("filament_type"):
        archive.filament_type = metadata["filament_type"]
    if metadata.get("filament_color"):
        archive.filament_color = metadata["filament_color"]
    if metadata.get("print_time_seconds"):
        archive.print_time_seconds = metadata["print_time_seconds"]
    if metadata.get("filament_used_grams"):
        archive.filament_used_grams = metadata["filament_used_grams"]
    if metadata.get("layer_height"):
        archive.layer_height = metadata["layer_height"]
    if metadata.get("nozzle_diameter"):
        archive.nozzle_diameter = metadata["nozzle_diameter"]
    if metadata.get("bed_temperature"):
        archive.bed_temperature = metadata["bed_temperature"]
    if metadata.get("nozzle_temperature"):
        archive.nozzle_temperature = metadata["nozzle_temperature"]
    if metadata.get("makerworld_url"):
        archive.makerworld_url = metadata["makerworld_url"]
    if metadata.get("designer"):
        archive.designer = metadata["designer"]

    # Calculate cost: prefer spool-based cost if available, else catalog-based

    if archive.filament_used_grams and archive.filament_type:
        usage_result = await db.execute(
            select(func.sum(SpoolUsageHistory.cost)).where(SpoolUsageHistory.archive_id == archive.id)
        )
        usage_cost = usage_result.scalar()
        if usage_cost is not None and usage_cost > 0:
            archive.cost = float(Decimal(str(usage_cost)).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP))
        else:
            primary_type = archive.filament_type.split(",")[0].strip()
            filament_result = await db.execute(select(Filament).where(Filament.type == primary_type).limit(1))
            filament = filament_result.scalar_one_or_none()
            if filament:
                archive.cost = float(
                    Decimal(str((archive.filament_used_grams / 1000) * filament.cost_per_kg)).quantize(
                        Decimal("0.01"), rounding=ROUND_HALF_UP
                    )
                )
            else:
                # Use default filament cost from settings
                default_cost_setting = await get_setting(db, "default_filament_cost")
                default_cost_per_kg = float(default_cost_setting) if default_cost_setting else 25.0
                archive.cost = float(
                    Decimal(str((archive.filament_used_grams / 1000) * default_cost_per_kg)).quantize(
                        Decimal("0.01"), rounding=ROUND_HALF_UP
                    )
                )

    await db.commit()
    await db.refresh(archive)
    return archive


@router.post("/recalculate-costs")
async def recalculate_all_costs(
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Recalculate costs for all archives based on filament usage and prices."""

    from backend.app.api.routes.settings import get_setting

    result = await db.execute(select(PrintArchive))
    archives = list(result.scalars().all())

    # Load all filaments for lookup
    filament_result = await db.execute(select(Filament))
    filaments = {f.type: f.cost_per_kg for f in filament_result.scalars().all()}

    # Get default filament cost from settings
    default_cost_setting = await get_setting(db, "default_filament_cost")
    default_cost_per_kg = float(default_cost_setting) if default_cost_setting else 25.0

    # Pre-fetch all usage costs by archive_id
    usage_costs_result = await db.execute(
        select(SpoolUsageHistory.archive_id, func.sum(SpoolUsageHistory.cost)).group_by(SpoolUsageHistory.archive_id)
    )
    usage_costs = usage_costs_result.fetchall()
    cost_map = {row[0]: row[1] for row in usage_costs if row[0] is not None and row[1] is not None and row[1] > 0}

    updated = 0
    for archive in archives:
        usage_cost = cost_map.get(archive.id)
        if usage_cost is not None:
            new_cost = round(usage_cost, 2)
        else:
            # Fallback: sum costs for old records by print_name
            usage_result = await db.execute(
                select(func.sum(SpoolUsageHistory.cost)).where(
                    SpoolUsageHistory.print_name == archive.print_name,
                    SpoolUsageHistory.archive_id.is_(None),
                )
            )
            fallback_cost = usage_result.scalar()
            if fallback_cost is not None and fallback_cost > 0:
                new_cost = round(fallback_cost, 2)
            elif archive.filament_used_grams and archive.filament_type:
                primary_type = archive.filament_type.split(",")[0].strip()
                cost_per_kg = filaments.get(primary_type, default_cost_per_kg)
                new_cost = round((archive.filament_used_grams / 1000) * cost_per_kg, 2)
            else:
                new_cost = None
        if new_cost is not None and archive.cost != new_cost:
            archive.cost = new_cost
            updated += 1

    await db.commit()
    return {"message": f"Recalculated costs for {updated} archives", "updated": updated}


@router.post("/rescan-all")
async def rescan_all_archives(
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Rescan all archives and update their metadata."""
    from backend.app.services.archive import ThreeMFParser

    result = await db.execute(select(PrintArchive))
    archives = list(result.scalars().all())

    updated = 0
    errors = []

    for archive in archives:
        try:
            file_path = settings.base_dir / archive.file_path
            if not file_path.is_file():
                errors.append({"id": archive.id, "error": "File not found"})
                continue

            parser = ThreeMFParser(file_path)
            metadata = parser.parse()

            if metadata.get("filament_type"):
                archive.filament_type = metadata["filament_type"]
            if metadata.get("filament_color"):
                archive.filament_color = metadata["filament_color"]
            if metadata.get("print_time_seconds"):
                archive.print_time_seconds = metadata["print_time_seconds"]
            if metadata.get("filament_used_grams"):
                archive.filament_used_grams = metadata["filament_used_grams"]
            if metadata.get("layer_height"):
                archive.layer_height = metadata["layer_height"]
            if metadata.get("nozzle_diameter"):
                archive.nozzle_diameter = metadata["nozzle_diameter"]
            if metadata.get("makerworld_url"):
                archive.makerworld_url = metadata["makerworld_url"]
            if metadata.get("designer"):
                archive.designer = metadata["designer"]

            updated += 1
        except Exception as e:
            logger.exception("Failed to rescan archive %s: %s", archive.id, e)
            errors.append({"id": archive.id, "error": "Failed to parse 3MF file"})

    await db.commit()
    return {"updated": updated, "errors": errors}


@router.get("/{archive_id}/duplicates")
async def get_archive_duplicates(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get duplicates for a specific archive."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    makerworld_id = archive.extra_data.get("makerworld_model_id") if archive.extra_data else None
    duplicates = await service.find_duplicates(
        archive_id=archive.id,
        content_hash=archive.content_hash,
        print_name=archive.print_name,
        makerworld_model_id=makerworld_id,
    )
    return {"duplicates": duplicates, "count": len(duplicates)}


@router.post("/backfill-hashes")
async def backfill_content_hashes(
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Compute and store content hashes for all archives missing them."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.content_hash.is_(None)))
    archives = list(result.scalars().all())

    updated = 0
    errors = []

    for archive in archives:
        try:
            file_path = settings.base_dir / archive.file_path
            if not file_path.is_file():
                errors.append({"id": archive.id, "error": "File not found"})
                continue

            archive.content_hash = ArchiveService.compute_file_hash(file_path)
            updated += 1
        except Exception as e:
            logger.exception("Failed to compute hash for archive %s: %s", archive.id, e)
            errors.append({"id": archive.id, "error": "Failed to compute hash"})

    await db.commit()
    return {"updated": updated, "errors": errors}


@router.delete("/{archive_id}")
async def delete_archive(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    auth_result: tuple[User | None, bool] = Depends(
        require_ownership_permission(
            Permission.ARCHIVES_DELETE_ALL,
            Permission.ARCHIVES_DELETE_OWN,
        )
    ),
):
    """Delete an archive."""
    user, can_modify_all = auth_result

    # Get archive first to check ownership
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    # Ownership check
    if not can_modify_all:
        if archive.created_by_id != user.id:
            raise HTTPException(403, "You can only delete your own archives")

    service = ArchiveService(db)
    if not await service.delete_archive(archive_id):
        raise HTTPException(404, "Archive not found")
    return {"status": "deleted"}


@router.get("/{archive_id}/download")
async def download_archive(
    archive_id: int,
    inline: bool = False,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Download the 3MF file."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    # Use inline disposition to let browser/OS handle file association
    content_disposition = "inline" if inline else "attachment"

    return FileResponse(
        path=file_path,
        filename=archive.filename,
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
        content_disposition_type=content_disposition,
    )


@router.get("/{archive_id}/file/{filename}")
async def download_archive_with_filename(
    archive_id: int,
    filename: str,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Download the 3MF file with filename in URL."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    return FileResponse(
        path=file_path,
        filename=archive.filename,
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
    )


@router.post("/{archive_id}/slicer-token")
async def create_archive_slicer_token(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Create a short-lived download token for opening files in slicer applications.

    Slicer protocol handlers (bambustudioopen://, orcaslicer://) cannot send
    auth headers, so they use this token in the URL path instead.
    """
    from backend.app.core.auth import create_slicer_download_token

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    token = create_slicer_download_token("archive", archive_id)
    return {"token": token}


@router.get("/{archive_id}/dl/{token}/{filename}")
async def download_archive_for_slicer(
    archive_id: int,
    token: str,
    filename: str,
    db: AsyncSession = Depends(get_db),
):
    """Download 3MF file using a slicer download token.

    Token-authenticated (no auth headers needed). The token is short-lived
    and single-use, created by POST /{archive_id}/slicer-token.
    Filename is at the end of the URL so slicers can detect the file format.
    """
    from backend.app.core.auth import verify_slicer_download_token

    if not verify_slicer_download_token(token, "archive", archive_id):
        raise HTTPException(403, "Invalid or expired download token")

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    return FileResponse(
        path=file_path,
        filename=archive.filename,
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
    )


@router.get("/{archive_id}/thumbnail")
async def get_thumbnail(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get the thumbnail image.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive or not archive.thumbnail_path:
        raise HTTPException(404, "Thumbnail not found")

    thumb_path = settings.base_dir / archive.thumbnail_path
    if not thumb_path.exists():
        raise HTTPException(404, "Thumbnail file not found")

    # Use file modification time as ETag to bust cache
    mtime = int(thumb_path.stat().st_mtime)

    return FileResponse(
        path=thumb_path,
        media_type="image/png",
        headers={
            "Cache-Control": "no-cache, must-revalidate",
            "ETag": f'"{mtime}"',
        },
    )


@router.get("/{archive_id}/timelapse")
async def get_timelapse(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get the timelapse video.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive or not archive.timelapse_path:
        raise HTTPException(404, "Timelapse not found")

    timelapse_path = settings.base_dir / archive.timelapse_path
    if not timelapse_path.exists():
        raise HTTPException(404, "Timelapse file not found")

    # Use file modification time as ETag to bust cache after processing
    mtime = int(timelapse_path.stat().st_mtime)

    # Detect media type from file extension (AVI from P1S before background conversion)
    suffix = timelapse_path.suffix.lower()
    media_type = {".mp4": "video/mp4", ".avi": "video/x-msvideo", ".mkv": "video/x-matroska"}.get(suffix, "video/mp4")
    ext = suffix if suffix in (".mp4", ".avi", ".mkv") else ".mp4"

    return FileResponse(
        path=timelapse_path,
        media_type=media_type,
        filename=f"{archive.print_name or 'timelapse'}{ext}",
        headers={
            "Cache-Control": "no-cache, must-revalidate",
            "ETag": f'"{mtime}"',
        },
    )


@router.delete("/{archive_id}/timelapse")
async def delete_timelapse(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_DELETE_OWN),
):
    """Remove the timelapse video from an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.timelapse_path:
        raise HTTPException(404, "No timelapse attached to this archive")

    # Delete the file
    timelapse_path = settings.base_dir / archive.timelapse_path
    if timelapse_path.exists():
        timelapse_path.unlink()

    # Clear the path in database
    archive.timelapse_path = None
    await db.commit()

    return {"status": "deleted"}


@router.post("/{archive_id}/timelapse/scan")
async def scan_timelapse(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Scan printer for timelapse matching this archive and attach it."""
    from backend.app.models.printer import Printer
    from backend.app.services.bambu_ftp import (
        download_file_bytes_async,
        get_ftp_retry_settings,
        list_files_async,
        with_ftp_retry,
    )

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    if archive.timelapse_path:
        return {"status": "exists", "message": "Timelapse already attached"}

    if not archive.printer_id:
        raise HTTPException(400, "Archive has no associated printer")

    # Get printer
    result = await db.execute(select(Printer).where(Printer.id == archive.printer_id))
    printer = result.scalar_one_or_none()
    if not printer:
        raise HTTPException(404, "Printer not found")

    # Get base name from archive filename (without .3mf extension)
    base_name = Path(archive.filename).stem

    # Scan timelapse directory on printer
    # Different printer models use different paths
    files = []
    for timelapse_path in ["/timelapse", "/timelapse/video", "/record", "/recording"]:
        try:
            files = await list_files_async(
                printer.ip_address, printer.access_code, timelapse_path, printer_model=printer.model
            )
            if files:
                break
        except Exception:
            continue
    if not files:
        raise HTTPException(500, "Failed to connect to printer or no timelapse directory found")

    # Look for matching timelapse
    matching_file = None
    video_files = [
        f for f in files if not f.get("is_directory") and f.get("name", "").lower().endswith((".mp4", ".avi"))
    ]

    # Strategy 1: Match by print name in filename
    for f in video_files:
        fname = f.get("name", "")
        if base_name.lower() in fname.lower():
            matching_file = f
            break

    # Strategy 2: Match by timestamp proximity
    # Bambu timelapse filename uses the print START time (when recording began)
    if not matching_file and (archive.started_at or archive.completed_at or archive.created_at):
        import re
        from datetime import datetime, timedelta

        # Prefer started_at since video filename is the print start time
        # Fall back to completed_at or created_at if started_at is not available
        archive_start = archive.started_at
        archive_end = archive.completed_at or archive.created_at
        best_match = None
        best_diff = timedelta(hours=24)  # Max 24 hour difference

        for f in video_files:
            fname = f.get("name", "")
            # Parse timestamp from filename like "video_2025-11-24_03-17-40.mp4"
            match = re.search(r"(\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2})", fname)
            if match:
                try:
                    file_time = datetime.strptime(match.group(1), "%Y-%m-%d_%H-%M-%S")

                    # Try multiple timezone offsets since printer timezone can vary
                    # Common cases: local time (0), CST/UTC+8 (+8), or UTC (-local offset)
                    for hour_offset in [0, 8, -8, 7, -7, 1, -1]:
                        adjusted_file_time = file_time - timedelta(hours=hour_offset)

                        # Check against start time (video filename = print start)
                        if archive_start:
                            diff = abs(adjusted_file_time - archive_start)
                            if diff < best_diff:
                                best_diff = diff
                                best_match = f
                                logger.debug(
                                    f"Timelapse match candidate: {fname} with offset {hour_offset}h, "
                                    f"diff from start: {diff}"
                                )

                        # Also check against end time with a buffer
                        # (video timestamp should be BEFORE completion time)
                        if archive_end:
                            # The video timestamp should be within the print duration before completion
                            if adjusted_file_time < archive_end:
                                diff = archive_end - adjusted_file_time
                                # Reasonable print duration: up to 48 hours
                                if diff < timedelta(hours=48) and diff < best_diff:
                                    best_diff = diff
                                    best_match = f
                                    logger.debug(
                                        f"Timelapse match candidate (from end): {fname} with offset {hour_offset}h, "
                                        f"diff: {diff}"
                                    )

                except ValueError:
                    continue

        # Accept match within 4 hours (more lenient for timezone issues)
        if best_match and best_diff < timedelta(hours=4):
            matching_file = best_match
            logger.info("Matched timelapse by timestamp: %s (diff: %s)", best_match.get("name"), best_diff)

    # Strategy 3: Use file modification time from FTP listing
    # This handles cases where printer's filename timestamp is wrong but file mtime is correct
    if not matching_file and (archive.started_at or archive.completed_at or archive.created_at):
        from datetime import datetime, timedelta

        _archive_start = archive.started_at
        archive_end = archive.completed_at or archive.created_at
        best_match = None
        best_diff = timedelta(hours=24)

        for f in video_files:
            mtime = f.get("mtime")
            if mtime:
                # Timelapse file should be modified during or shortly after the print
                # The mtime should be close to completion time (video finishes when print ends)
                if archive_end:
                    diff = abs(mtime - archive_end)
                    if diff < best_diff:
                        best_diff = diff
                        best_match = f
                        logger.debug(
                            f"Timelapse mtime match candidate: {f.get('name')}, mtime: {mtime}, diff from end: {diff}"
                        )

        if best_match and best_diff < timedelta(hours=2):
            matching_file = best_match
            logger.info("Matched timelapse by file mtime: %s (diff: %s)", best_match.get("name"), best_diff)

    # Strategy 4: If only one timelapse exists and archive was recently completed, use it
    # This handles cases where printer clock is wrong or timezone issues exist
    if not matching_file and len(video_files) == 1:
        from datetime import datetime, timedelta, timezone

        archive_completed = archive.completed_at or archive.created_at
        if archive_completed:
            if archive_completed.tzinfo is None:
                archive_completed = archive_completed.replace(tzinfo=timezone.utc)
            time_since_completion = datetime.now(timezone.utc) - archive_completed
            # If archive was completed within the last hour, assume the single timelapse is for it
            if time_since_completion < timedelta(hours=1):
                matching_file = video_files[0]
                logger.info("Using single timelapse file as fallback: %s", video_files[0].get("name"))

    # Note: We intentionally don't use a "most recent file" fallback because
    # we can't verify if timelapse was actually enabled for this print.
    # Instead, return the list of available files for manual selection.

    if not matching_file:
        # Return available files for manual selection
        available_files = [
            {
                "name": f.get("name"),
                "path": f.get("path"),
                "size": f.get("size"),
                "mtime": f.get("mtime").isoformat() if f.get("mtime") else None,
            }
            for f in video_files
        ]
        # Sort by mtime descending (most recent first)
        available_files.sort(key=lambda x: x.get("mtime") or "", reverse=True)
        return {
            "status": "not_found",
            "message": "No matching timelapse found - please select manually",
            "available_files": available_files,
        }

    # Download the timelapse - use the full path from the file listing
    remote_path = matching_file.get("path") or f"/timelapse/{matching_file['name']}"

    # Get FTP retry settings
    ftp_retry_enabled, ftp_retry_count, ftp_retry_delay, ftp_timeout = await get_ftp_retry_settings()

    if ftp_retry_enabled:
        timelapse_data = await with_ftp_retry(
            download_file_bytes_async,
            printer.ip_address,
            printer.access_code,
            remote_path,
            socket_timeout=ftp_timeout,
            printer_model=printer.model,
            max_retries=ftp_retry_count,
            retry_delay=ftp_retry_delay,
            operation_name=f"Download timelapse {matching_file['name']}",
        )
    else:
        timelapse_data = await download_file_bytes_async(
            printer.ip_address,
            printer.access_code,
            remote_path,
            socket_timeout=ftp_timeout,
            printer_model=printer.model,
        )

    if not timelapse_data:
        raise HTTPException(500, "Failed to download timelapse")

    # Attach timelapse to archive
    success = await service.attach_timelapse(archive_id, timelapse_data, matching_file["name"])

    if not success:
        raise HTTPException(500, "Failed to attach timelapse")

    return {
        "status": "attached",
        "message": f"Timelapse '{matching_file['name']}' attached successfully",
        "filename": matching_file["name"],
    }


@router.post("/{archive_id}/timelapse/select")
async def select_timelapse(
    archive_id: int,
    filename: str = Query(..., description="Timelapse filename to attach"),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Manually select a timelapse from the printer to attach."""
    from backend.app.models.printer import Printer
    from backend.app.services.bambu_ftp import (
        download_file_bytes_async,
        get_ftp_retry_settings,
        list_files_async,
        with_ftp_retry,
    )

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.printer_id:
        raise HTTPException(400, "Archive has no associated printer")

    result = await db.execute(select(Printer).where(Printer.id == archive.printer_id))
    printer = result.scalar_one_or_none()
    if not printer:
        raise HTTPException(404, "Printer not found")

    # Find the file on the printer
    files = []
    remote_path = None
    for timelapse_dir in ["/timelapse", "/timelapse/video", "/record", "/recording"]:
        try:
            files = await list_files_async(
                printer.ip_address, printer.access_code, timelapse_dir, printer_model=printer.model
            )
            for f in files:
                if f.get("name") == filename:
                    remote_path = f.get("path") or f"{timelapse_dir}/{filename}"
                    break
            if remote_path:
                break
        except Exception:
            continue

    if not remote_path:
        raise HTTPException(404, f"Timelapse '{filename}' not found on printer")

    # Download and attach
    ftp_retry_enabled, ftp_retry_count, ftp_retry_delay, ftp_timeout = await get_ftp_retry_settings()

    if ftp_retry_enabled:
        timelapse_data = await with_ftp_retry(
            download_file_bytes_async,
            printer.ip_address,
            printer.access_code,
            remote_path,
            socket_timeout=ftp_timeout,
            printer_model=printer.model,
            max_retries=ftp_retry_count,
            retry_delay=ftp_retry_delay,
            operation_name=f"Download timelapse {filename}",
        )
    else:
        timelapse_data = await download_file_bytes_async(
            printer.ip_address,
            printer.access_code,
            remote_path,
            socket_timeout=ftp_timeout,
            printer_model=printer.model,
        )

    if not timelapse_data:
        raise HTTPException(500, "Failed to download timelapse")

    success = await service.attach_timelapse(archive_id, timelapse_data, filename)
    if not success:
        raise HTTPException(500, "Failed to attach timelapse")

    return {
        "status": "attached",
        "message": f"Timelapse '{filename}' attached successfully",
        "filename": filename,
    }


@router.post("/{archive_id}/timelapse/upload")
async def upload_timelapse(
    archive_id: int,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Manually upload a timelapse video to an archive."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not file.filename or not file.filename.endswith((".mp4", ".avi", ".mkv")):
        raise HTTPException(400, "File must be a video file (.mp4, .avi, .mkv)")

    content = await file.read()
    success = await service.attach_timelapse(archive_id, content, file.filename)

    if not success:
        raise HTTPException(500, "Failed to attach timelapse")

    return {"status": "attached", "filename": file.filename}


@router.get("/{archive_id}/timelapse/info")
async def get_timelapse_info(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get timelapse video metadata for editor."""
    from backend.app.schemas.timelapse import TimelapseInfoResponse
    from backend.app.services.timelapse_processor import TimelapseProcessor

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive or not archive.timelapse_path:
        raise HTTPException(404, "Timelapse not found")

    timelapse_path = settings.base_dir / archive.timelapse_path
    if not timelapse_path.exists():
        raise HTTPException(404, "Timelapse file not found")

    try:
        processor = TimelapseProcessor(timelapse_path)
        info = await processor.get_info()
        return TimelapseInfoResponse(**info)
    except Exception as e:
        logger.error("Failed to get timelapse info: %s", e)
        raise HTTPException(500, f"Failed to get video info: {str(e)}")


@router.get("/{archive_id}/timelapse/thumbnails")
async def get_timelapse_thumbnails(
    archive_id: int,
    count: int = Query(10, ge=1, le=30),
    width: int = Query(160, ge=80, le=320),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Generate timeline thumbnail frames for visual scrubbing."""
    import base64

    from backend.app.schemas.timelapse import ThumbnailResponse
    from backend.app.services.timelapse_processor import TimelapseProcessor

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive or not archive.timelapse_path:
        raise HTTPException(404, "Timelapse not found")

    timelapse_path = settings.base_dir / archive.timelapse_path
    if not timelapse_path.exists():
        raise HTTPException(404, "Timelapse file not found")

    try:
        processor = TimelapseProcessor(timelapse_path)
        thumbnails = await processor.generate_thumbnails(count, width)

        return ThumbnailResponse(
            thumbnails=[base64.b64encode(data).decode() for _, data in thumbnails],
            timestamps=[ts for ts, _ in thumbnails],
        )
    except Exception as e:
        logger.error("Failed to generate thumbnails: %s", e)
        raise HTTPException(500, f"Failed to generate thumbnails: {str(e)}")


@router.post("/{archive_id}/timelapse/process")
async def process_timelapse(
    archive_id: int,
    trim_start: float = Form(0),
    trim_end: float = Form(None),
    speed: float = Form(1.0),
    save_mode: str = Form("new"),
    output_filename: str = Form(None),
    audio: UploadFile = File(None),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Process timelapse with trim, speed, and optional audio overlay."""
    import shutil
    import tempfile

    from backend.app.schemas.timelapse import ProcessResponse
    from backend.app.services.timelapse_processor import TimelapseProcessor

    # Validate speed
    if not 0.25 <= speed <= 4.0:
        raise HTTPException(400, "Speed must be between 0.25 and 4.0")

    if save_mode not in ("replace", "new"):
        raise HTTPException(400, "save_mode must be 'replace' or 'new'")

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive or not archive.timelapse_path:
        raise HTTPException(404, "Timelapse not found")

    timelapse_path = settings.base_dir / archive.timelapse_path
    if not timelapse_path.exists():
        raise HTTPException(404, "Timelapse file not found")

    archive_dir = timelapse_path.parent

    # Handle audio file
    audio_temp_path = None
    if audio and audio.filename:
        # Validate audio file extension
        if not audio.filename.lower().endswith((".mp3", ".wav", ".m4a", ".aac", ".ogg")):
            raise HTTPException(400, "Audio must be .mp3, .wav, .m4a, .aac, or .ogg")

        audio_content = await audio.read()
        # Extract and validate suffix to prevent path injection
        suffix = Path(audio.filename).suffix.lower()
        if suffix not in (".mp3", ".wav", ".m4a", ".aac", ".ogg"):
            raise HTTPException(400, "Invalid audio file extension")
        audio_temp_path = Path(tempfile.gettempdir()) / f"audio_{archive_id}{suffix}"
        audio_temp_path.write_bytes(audio_content)

    try:
        processor = TimelapseProcessor(timelapse_path)

        # Determine output path
        if save_mode == "replace":
            # Process to temp file first, then replace
            temp_output = Path(tempfile.gettempdir()) / f"processed_{archive_id}.mp4"
            output_path = temp_output
        else:
            # Save as new file alongside original
            filename = output_filename or f"{archive.print_name or 'timelapse'}_edited.mp4"
            # Sanitize filename - remove path separators and traversal sequences
            filename = "".join(c for c in filename if c.isalnum() or c in "._- ")
            # Prevent path traversal
            if ".." in filename or not filename or filename.startswith("."):
                filename = f"timelapse_{archive_id}_edited"
            if not filename.endswith(".mp4"):
                filename += ".mp4"
            output_path = archive_dir / filename

        success = await processor.process(
            output_path=output_path,
            trim_start=trim_start,
            trim_end=trim_end,
            speed=speed,
            audio_path=audio_temp_path,
        )

        if not success:
            raise HTTPException(500, "Video processing failed")

        # Handle save mode
        if save_mode == "replace":
            # Replace original file
            shutil.move(str(output_path), str(timelapse_path))
            final_path = archive.timelapse_path
            message = "Timelapse replaced successfully"
        else:
            final_path = str(output_path.relative_to(settings.base_dir))
            message = f"Saved as {output_path.name}"

        return ProcessResponse(
            status="completed",
            output_path=final_path,
            message=message,
        )

    except HTTPException:
        raise
    except Exception as e:
        logger.error("Timelapse processing failed: %s", e)
        raise HTTPException(500, f"Processing failed: {str(e)}")
    finally:
        # Cleanup temp audio file
        if audio_temp_path and audio_temp_path.exists():
            audio_temp_path.unlink()


# ============================================
# Photo Endpoints
# ============================================


@router.post("/{archive_id}/photos")
async def upload_photo(
    archive_id: int,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_OWN),
):
    """Upload a photo of the printed result."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not file.filename or not file.filename.lower().endswith((".jpg", ".jpeg", ".png", ".webp")):
        raise HTTPException(400, "File must be an image (.jpg, .jpeg, .png, .webp)")

    # Get archive directory
    archive_dir = settings.base_dir / Path(archive.file_path).parent
    photos_dir = archive_dir / "photos"
    photos_dir.mkdir(exist_ok=True)

    # Generate unique filename
    import uuid

    ext = Path(file.filename).suffix.lower()
    photo_filename = f"{uuid.uuid4().hex[:8]}{ext}"
    photo_path = photos_dir / photo_filename

    # Save file
    content = await file.read()
    photo_path.write_bytes(content)

    # Update archive photos list (create new list to trigger SQLAlchemy change detection)
    photos = list(archive.photos or [])
    photos.append(photo_filename)
    archive.photos = photos

    await db.commit()
    await db.refresh(archive)

    return {"status": "uploaded", "filename": photo_filename, "photos": archive.photos}


@router.get("/{archive_id}/photos/{filename}")
async def get_photo(
    archive_id: int,
    filename: str,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get a specific photo.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    archive_dir = settings.base_dir / Path(archive.file_path).parent
    photo_path = archive_dir / "photos" / filename

    if not photo_path.exists():
        raise HTTPException(404, "Photo not found")

    # Determine media type
    ext = Path(filename).suffix.lower()
    media_types = {
        ".jpg": "image/jpeg",
        ".jpeg": "image/jpeg",
        ".png": "image/png",
        ".webp": "image/webp",
    }
    media_type = media_types.get(ext, "image/jpeg")

    return FileResponse(path=photo_path, media_type=media_type)


@router.delete("/{archive_id}/photos/{filename}")
async def delete_photo(
    archive_id: int,
    filename: str,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_DELETE_OWN),
):
    """Delete a photo."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.photos or filename not in archive.photos:
        raise HTTPException(404, "Photo not found")

    # Delete file
    archive_dir = settings.base_dir / Path(archive.file_path).parent
    photo_path = archive_dir / "photos" / filename
    if photo_path.exists():
        photo_path.unlink()

    # Update archive photos list
    photos = [p for p in archive.photos if p != filename]
    archive.photos = photos if photos else None

    await db.commit()

    return {"status": "deleted", "photos": archive.photos}


# ============================================
# QR Code Endpoint
# ============================================


@router.get("/{archive_id}/qrcode")
async def get_qrcode(
    archive_id: int,
    request: Request,
    size: int = 200,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Generate a QR code that links to this archive.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    try:
        import qrcode
        from PIL import Image as PILImage
    except ImportError:
        raise HTTPException(500, "QR code generation not available - qrcode package not installed")

    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    # Build URL to archive download
    base_url = str(request.base_url).rstrip("/")
    archive_url = f"{base_url}/api/v1/archives/{archive_id}/download"

    # Generate QR code
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_M,
        box_size=10,
        border=2,
    )
    qr.add_data(archive_url)
    qr.make(fit=True)

    img = qr.make_image(fill_color="black", back_color="white")

    # Convert to PIL Image for resizing
    pil_img = img.get_image()

    # Resize if needed
    if size != 200:
        pil_img = pil_img.resize((size, size), PILImage.Resampling.LANCZOS)

    # Convert to bytes
    buffer = io.BytesIO()
    pil_img.save(buffer, format="PNG")
    buffer.seek(0)

    return Response(
        content=buffer.getvalue(),
        media_type="image/png",
        headers={"Content-Disposition": f'inline; filename="qr_{archive.print_name or archive_id}.png"'},
    )


@router.get("/{archive_id}/capabilities")
async def get_archive_capabilities(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Check what viewing capabilities are available for this 3MF file."""
    import defusedxml.ElementTree as ET

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    has_model = False
    has_gcode = False
    has_source = False
    build_volume = {"x": 256, "y": 256, "z": 256}  # Default to X1/P1 size
    filament_colors: list[str] = []

    # Check if source 3MF exists - this is where actual mesh data typically lives
    source_path = None
    if archive.source_3mf_path:
        source_path = settings.base_dir / archive.source_3mf_path
        if source_path.exists():
            has_source = True

    # Helper function to check for mesh data and extract colors from a 3MF file
    def extract_3mf_info(zf_path: Path) -> tuple[bool, list[str], dict]:
        """Extract mesh presence, colors, and build volume from a 3MF file."""
        found_mesh = False
        colors: list[str] = []
        volume = {"x": 256, "y": 256, "z": 256}

        try:
            with zipfile.ZipFile(zf_path, "r") as zf:
                names = zf.namelist()

                # Check for 3D model - look for actual mesh data
                for name in names:
                    if name.endswith(".model"):
                        try:
                            content = zf.read(name).decode("utf-8")
                            if "<vertex" in content or "<mesh" in content:
                                found_mesh = True
                                break
                        except Exception:
                            pass  # Skip unreadable .model entries in archive

                # Extract filament colors from project_settings.config
                if "Metadata/project_settings.config" in names:
                    try:
                        config_content = zf.read("Metadata/project_settings.config").decode("utf-8")
                        config_data = json.loads(config_content)

                        # Parse printable_area: ['0x0', '256x0', '256x256', '0x256']
                        printable_area = config_data.get("printable_area", [])
                        if printable_area and len(printable_area) >= 3:
                            max_x = 0
                            max_y = 0
                            for coord in printable_area:
                                if "x" in coord:
                                    parts = coord.split("x")
                                    if len(parts) == 2:
                                        try:
                                            x, y = int(parts[0]), int(parts[1])
                                            max_x = max(max_x, x)
                                            max_y = max(max_y, y)
                                        except ValueError:
                                            pass  # Skip non-numeric printable_area coordinate
                            if max_x > 0 and max_y > 0:
                                volume["x"] = max_x
                                volume["y"] = max_y

                        # Parse printable_height
                        printable_height = config_data.get("printable_height")
                        if printable_height:
                            try:
                                volume["z"] = int(printable_height)
                            except (ValueError, TypeError):
                                pass  # Skip unparseable printable_height value

                        # Extract filament colors
                        raw_colors = config_data.get("filament_colour", [])
                        if raw_colors:
                            for color in raw_colors:
                                if color and isinstance(color, str):
                                    colors.append(color)
                    except Exception:
                        pass  # Skip malformed project_settings.config
        except zipfile.BadZipFile:
            pass  # File is not a valid zip/3MF archive

        return found_mesh, colors, volume

    # First check source 3MF for mesh data and colors (preferred for 3D model viewing)
    if has_source and source_path:
        source_has_mesh, source_colors, source_volume = extract_3mf_info(source_path)
        if source_has_mesh:
            has_model = True
        if source_colors:
            filament_colors = source_colors
        if source_volume["x"] != 256 or source_volume["y"] != 256 or source_volume["z"] != 256:
            build_volume = source_volume

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            names = zf.namelist()

            # Check for G-code in the sliced file
            has_gcode = any(n.startswith("Metadata/") and n.endswith(".gcode") for n in names)

            # Check for 3D model in sliced file (fallback if no source)
            if not has_model:
                for name in names:
                    if name.endswith(".model"):
                        try:
                            content = zf.read(name).decode("utf-8")
                            if "<vertex" in content or "<mesh" in content:
                                has_model = True
                                break
                        except Exception:
                            pass  # Skip unreadable .model entries in archive

            # Extract filament colors from slice_info.config (for gcode preview)
            # These are the actual filaments used in the print, indexed by tool/extruder
            slice_colors: list[str] = []
            if "Metadata/slice_info.config" in names:
                try:
                    slice_content = zf.read("Metadata/slice_info.config").decode("utf-8")
                    root = ET.fromstring(slice_content)

                    filaments = root.findall(".//filament")
                    filament_map: dict[int, str] = {}
                    for f in filaments:
                        fid = f.get("id")
                        fcolor = f.get("color")
                        used_g = f.get("used_g", "0")
                        try:
                            used_amount = float(used_g)
                        except (ValueError, TypeError):
                            used_amount = 0

                        if fid is not None and fcolor:
                            try:
                                tool_id = int(fid) - 1
                                if tool_id >= 0 and used_amount > 0:
                                    filament_map[tool_id] = fcolor
                            except ValueError:
                                pass  # Skip filament entry with non-numeric ID

                    if filament_map:
                        max_tool = max(filament_map.keys())
                        for i in range(max_tool + 1):
                            slice_colors.append(filament_map.get(i, "#00AE42"))
                except Exception:
                    pass  # Skip malformed slice_info.config XML

            # Use slice_info colors if we don't have colors from source yet
            if not filament_colors and slice_colors:
                filament_colors = slice_colors

            # Extract build volume from sliced file if not already set from source
            if build_volume["x"] == 256 and build_volume["y"] == 256:
                if "Metadata/project_settings.config" in names:
                    try:
                        config_content = zf.read("Metadata/project_settings.config").decode("utf-8")
                        config_data = json.loads(config_content)

                        printable_area = config_data.get("printable_area", [])
                        if printable_area and len(printable_area) >= 3:
                            max_x = 0
                            max_y = 0
                            for coord in printable_area:
                                if "x" in coord:
                                    parts = coord.split("x")
                                    if len(parts) == 2:
                                        try:
                                            x, y = int(parts[0]), int(parts[1])
                                            max_x = max(max_x, x)
                                            max_y = max(max_y, y)
                                        except ValueError:
                                            pass  # Skip non-numeric printable_area coordinate
                            if max_x > 0 and max_y > 0:
                                build_volume["x"] = max_x
                                build_volume["y"] = max_y

                        printable_height = config_data.get("printable_height")
                        if printable_height:
                            try:
                                build_volume["z"] = int(printable_height)
                            except (ValueError, TypeError):
                                pass  # Skip unparseable printable_height value

                        # Fallback colors from project_settings if still empty
                        if not filament_colors:
                            raw_colors = config_data.get("filament_colour", [])
                            if raw_colors:
                                for color in raw_colors:
                                    if color and isinstance(color, str):
                                        filament_colors.append(color)
                    except Exception:
                        pass  # Skip malformed project_settings.config

    except zipfile.BadZipFile:
        raise HTTPException(400, "Invalid 3MF file")

    return {
        "has_model": has_model,
        "has_gcode": has_gcode,
        "has_source": has_source,
        "build_volume": build_volume,
        "filament_colors": filament_colors,
    }


@router.get("/{archive_id}/gcode")
async def get_gcode(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Extract and return G-code from the 3MF file."""
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            # Bambu 3MF files store G-code in Metadata/plate_X.gcode
            gcode_files = [n for n in zf.namelist() if n.startswith("Metadata/") and n.endswith(".gcode")]
            if not gcode_files:
                raise HTTPException(
                    404,
                    "No G-code found. This file hasn't been sliced yet - G-code is only available after slicing in Bambu Studio.",
                )

            # Get the first plate's G-code (usually plate_1.gcode)
            gcode_content = zf.read(gcode_files[0]).decode("utf-8")
            return Response(content=gcode_content, media_type="text/plain")
    except zipfile.BadZipFile:
        raise HTTPException(400, "Invalid 3MF file")
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(500, f"Error extracting G-code: {str(e)}")


@router.get("/{archive_id}/plate-preview")
async def get_plate_preview(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get the plate preview image from the 3MF file.

    Returns the slicer-generated plate thumbnail which shows the model
    with correct colors and positioning.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "File not found")

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            names = zf.namelist()

            # Try to find plate preview images in order of preference
            # First look for the specific plate being printed (check slice_info for plate index)
            plate_num = 1
            if "Metadata/slice_info.config" in names:
                try:
                    import defusedxml.ElementTree as ET

                    slice_content = zf.read("Metadata/slice_info.config").decode("utf-8")
                    root = ET.fromstring(slice_content)
                    plate_elem = root.find(".//plate/metadata[@key='index']")
                    if plate_elem is not None:
                        plate_num = int(plate_elem.get("value", "1"))
                except Exception:
                    pass  # Default plate_num=1 if slice_info is missing or malformed

            # Try plate-specific image first, then fall back to plate_1
            preview_paths = [
                f"Metadata/plate_{plate_num}.png",
                "Metadata/plate_1.png",
                "Metadata/thumbnail.png",
            ]

            for preview_path in preview_paths:
                if preview_path in names:
                    image_data = zf.read(preview_path)
                    return Response(content=image_data, media_type="image/png")

            # If no plate image, try any PNG in Metadata
            for name in names:
                if name.startswith("Metadata/plate_") and name.endswith(".png") and "_small" not in name:
                    image_data = zf.read(name)
                    return Response(content=image_data, media_type="image/png")

            raise HTTPException(404, "No plate preview found in 3MF file")

    except zipfile.BadZipFile:
        raise HTTPException(400, "Invalid 3MF file")
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(500, f"Error extracting plate preview: {str(e)}")


@router.post("/upload")
async def upload_archive(
    file: UploadFile = File(...),
    printer_id: int | None = None,
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_CREATE),
):
    """Manually upload a 3MF file to archive."""
    if not file.filename or not file.filename.endswith(".3mf"):
        raise HTTPException(400, "File must be a .3mf file")

    # Save uploaded file temporarily
    temp_path = settings.archive_dir / "temp" / file.filename
    temp_path.parent.mkdir(parents=True, exist_ok=True)

    try:
        content = await file.read()
        temp_path.write_bytes(content)

        service = ArchiveService(db)
        archive = await service.archive_print(
            printer_id=printer_id,
            source_file=temp_path,
            created_by_id=current_user.id if current_user else None,
        )

        if not archive:
            raise HTTPException(400, "Failed to archive file")

        return ArchiveResponse.model_validate(archive)
    finally:
        if temp_path.exists():
            temp_path.unlink()


@router.post("/upload-bulk")
async def upload_archives_bulk(
    files: list[UploadFile] = File(...),
    printer_id: int | None = None,
    db: AsyncSession = Depends(get_db),
    current_user: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_CREATE),
):
    """Bulk upload multiple 3MF files to archive."""
    results = []
    errors = []

    for file in files:
        if not file.filename or not file.filename.endswith(".3mf"):
            errors.append({"filename": file.filename or "unknown", "error": "Not a .3mf file"})
            continue

        temp_path = settings.archive_dir / "temp" / file.filename
        temp_path.parent.mkdir(parents=True, exist_ok=True)

        try:
            content = await file.read()
            temp_path.write_bytes(content)

            service = ArchiveService(db)
            archive = await service.archive_print(
                printer_id=printer_id,
                source_file=temp_path,
                created_by_id=current_user.id if current_user else None,
            )

            if archive:
                results.append(
                    {
                        "filename": file.filename,
                        "id": archive.id,
                        "status": "success",
                    }
                )
            else:
                errors.append({"filename": file.filename, "error": "Failed to process"})
        except Exception as e:
            logger.exception("Failed to upload archive %s: %s", file.filename, e)
            errors.append({"filename": file.filename, "error": "Failed to process file"})
        finally:
            if temp_path.exists():
                temp_path.unlink()

    return {
        "uploaded": len(results),
        "failed": len(errors),
        "results": results,
        "errors": errors,
    }


@router.get("/{archive_id}/plates")
async def get_archive_plates(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get available plates from a multi-plate 3MF archive.

    Returns a list of plates with their index, name, thumbnail availability,
    and filament requirements. For single-plate exports, returns a single plate.
    """
    import re

    import defusedxml.ElementTree as ET

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    plates = []

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            namelist = zf.namelist()

            # Find all plate gcode files to determine available plates
            gcode_files = [n for n in namelist if n.startswith("Metadata/plate_") and n.endswith(".gcode")]

            # If no gcode is present (source-only or unsliced), fall back to plate JSON/PNG
            plate_indices: list[int] = []
            if gcode_files:
                # Extract plate indices from gcode filenames
                for gf in gcode_files:
                    # "Metadata/plate_5.gcode" -> 5
                    try:
                        # Remove "Metadata/plate_" and ".gcode"
                        plate_str = gf[15:-6]
                        plate_indices.append(int(plate_str))
                    except ValueError:
                        pass  # Skip gcode file with non-numeric plate index
            else:
                plate_json_files = [n for n in namelist if n.startswith("Metadata/plate_") and n.endswith(".json")]
                plate_png_files = [
                    n
                    for n in namelist
                    if n.startswith("Metadata/plate_")
                    and n.endswith(".png")
                    and "_small" not in n
                    and "no_light" not in n
                ]
                plate_name_candidates = plate_json_files + plate_png_files
                plate_re = re.compile(r"^Metadata/plate_(\d+)\.(json|png)$")
                seen_indices: set[int] = set()
                for name in plate_name_candidates:
                    match = plate_re.match(name)
                    if match:
                        try:
                            index = int(match.group(1))
                        except ValueError:
                            continue
                        if index in seen_indices:
                            continue
                        seen_indices.add(index)
                        plate_indices.append(index)

            if not plate_indices:
                # No plate metadata found
                return {
                    "archive_id": archive_id,
                    "filename": archive.filename,
                    "plates": [],
                    "is_multi_plate": False,
                }

            plate_indices.sort()

            # Parse model_settings.config for plate names + object assignments
            # Plate names are stored with plater_id and plater_name keys
            plate_names = {}  # plater_id -> name
            plate_object_ids: dict[int, list[str]] = {}
            object_names_by_id: dict[str, str] = {}
            if "Metadata/model_settings.config" in namelist:
                try:
                    model_content = zf.read("Metadata/model_settings.config").decode()
                    model_root = ET.fromstring(model_content)
                    # Build object ID -> name map
                    for obj_elem in model_root.findall(".//object"):
                        obj_id = obj_elem.get("id")
                        if not obj_id:
                            continue
                        name_meta = obj_elem.find("metadata[@key='name']")
                        obj_name = name_meta.get("value") if name_meta is not None else None
                        if obj_name:
                            object_names_by_id[obj_id] = obj_name

                    for plate_elem in model_root.findall(".//plate"):
                        plater_id = None
                        plater_name = None
                        for meta in plate_elem.findall("metadata"):
                            key = meta.get("key")
                            value = meta.get("value")
                            if key == "plater_id" and value:
                                try:
                                    plater_id = int(value)
                                except ValueError:
                                    pass  # Skip plate with non-numeric plater_id
                            elif key == "plater_name" and value:
                                plater_name = value.strip()
                        if plater_id is not None and plater_name:
                            plate_names[plater_id] = plater_name

                        if plater_id is not None:
                            for instance_elem in plate_elem.findall("model_instance"):
                                for inst_meta in instance_elem.findall("metadata"):
                                    if inst_meta.get("key") == "object_id":
                                        obj_id = inst_meta.get("value")
                                        if not obj_id:
                                            continue
                                        plate_object_ids.setdefault(plater_id, [])
                                        if obj_id not in plate_object_ids[plater_id]:
                                            plate_object_ids[plater_id].append(obj_id)
                except Exception:
                    pass  # model_settings.config parsing is optional

            # Parse slice_info.config for plate metadata
            plate_metadata = {}  # plate_index -> {filaments, prediction, weight, name, objects}
            if "Metadata/slice_info.config" in namelist:
                content = zf.read("Metadata/slice_info.config").decode()
                root = ET.fromstring(content)

                for plate_elem in root.findall(".//plate"):
                    plate_info = {"filaments": [], "prediction": None, "weight": None, "name": None, "objects": []}

                    # Get plate index from metadata
                    plate_index = None
                    for meta in plate_elem.findall("metadata"):
                        key = meta.get("key")
                        value = meta.get("value")
                        if key == "index" and value:
                            try:
                                plate_index = int(value)
                            except ValueError:
                                pass  # Skip plate with non-numeric index
                        elif key == "prediction" and value:
                            try:
                                plate_info["prediction"] = int(value)
                            except ValueError:
                                pass  # Skip non-numeric print time prediction
                        elif key == "weight" and value:
                            try:
                                plate_info["weight"] = float(value)
                            except ValueError:
                                pass  # Skip non-numeric filament weight

                    # Get filaments used in this plate
                    for filament_elem in plate_elem.findall("filament"):
                        filament_id = filament_elem.get("id")
                        filament_type = filament_elem.get("type", "")
                        filament_color = filament_elem.get("color", "")
                        used_g = filament_elem.get("used_g", "0")
                        used_m = filament_elem.get("used_m", "0")

                        try:
                            used_grams = float(used_g)
                        except (ValueError, TypeError):
                            used_grams = 0

                        if used_grams > 0 and filament_id:
                            plate_info["filaments"].append(
                                {
                                    "slot_id": int(filament_id),
                                    "type": filament_type,
                                    "color": filament_color,
                                    "used_grams": round(used_grams, 1),
                                    "used_meters": float(used_m) if used_m else 0,
                                }
                            )

                    # Sort filaments by slot ID
                    plate_info["filaments"].sort(key=lambda x: x["slot_id"])

                    # Collect all object names on this plate
                    for obj_elem in plate_elem.findall("object"):
                        obj_name = obj_elem.get("name")
                        if obj_name and obj_name not in plate_info["objects"]:
                            plate_info["objects"].append(obj_name)

                    # Set plate name: prefer custom name from model_settings.config,
                    # fall back to first object name if no custom name was set
                    if plate_index is not None:
                        custom_name = plate_names.get(plate_index)
                        if custom_name:
                            plate_info["name"] = custom_name
                        else:
                            # Fall back to first object name as hint
                            if plate_info["objects"]:
                                plate_info["name"] = plate_info["objects"][0]

                        plate_metadata[plate_index] = plate_info

            # Parse plate_*.json for object lists when slice_info is missing
            plate_json_objects: dict[int, list[str]] = {}
            for name in namelist:
                match = re.match(r"^Metadata/plate_(\d+)\.json$", name)
                if not match:
                    continue
                try:
                    plate_index = int(match.group(1))
                except ValueError:
                    continue
                try:
                    payload = json.loads(zf.read(name).decode())
                    bbox_objects = payload.get("bbox_objects", [])
                    names = []
                    for obj in bbox_objects:
                        obj_name = obj.get("name") if isinstance(obj, dict) else None
                        if obj_name and obj_name not in names:
                            names.append(obj_name)
                    if names:
                        plate_json_objects[plate_index] = names
                except Exception:
                    continue

            # Build plate list
            for idx in plate_indices:
                meta = plate_metadata.get(idx, {})
                has_thumbnail = f"Metadata/plate_{idx}.png" in namelist
                objects = meta.get("objects", [])
                if not objects:
                    objects = plate_json_objects.get(idx, [])
                if not objects and plate_object_ids.get(idx):
                    objects = [
                        object_names_by_id.get(obj_id, f"Object {obj_id}") for obj_id in plate_object_ids.get(idx, [])
                    ]

                plate_name = meta.get("name")
                if not plate_name:
                    plate_name = plate_names.get(idx)
                if not plate_name and objects:
                    plate_name = objects[0]

                plates.append(
                    {
                        "index": idx,
                        "name": plate_name,
                        "objects": objects,
                        "object_count": len(objects),
                        "has_thumbnail": has_thumbnail,
                        "thumbnail_url": f"/api/v1/archives/{archive_id}/plate-thumbnail/{idx}"
                        if has_thumbnail
                        else None,
                        "print_time_seconds": meta.get("prediction"),
                        "filament_used_grams": meta.get("weight"),
                        "filaments": meta.get("filaments", []),
                    }
                )

    except Exception as e:
        logger.warning("Failed to parse plates from archive %s: %s", archive_id, e)

    return {
        "archive_id": archive_id,
        "filename": archive.filename,
        "plates": plates,
        "is_multi_plate": len(plates) > 1,
    }


@router.get("/{archive_id}/plate-thumbnail/{plate_index}")
async def get_plate_thumbnail(
    archive_id: int,
    plate_index: int,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get the thumbnail image for a specific plate.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            thumb_path = f"Metadata/plate_{plate_index}.png"
            if thumb_path in zf.namelist():
                data = zf.read(thumb_path)
                return Response(content=data, media_type="image/png")
    except Exception:
        pass  # Fall through to 404 if archive is unreadable or thumbnail missing

    raise HTTPException(404, f"Thumbnail for plate {plate_index} not found")


@router.get("/{archive_id}/filament-requirements")
async def get_filament_requirements(
    archive_id: int,
    plate_id: int | None = None,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get filament requirements from the archived 3MF file.

    Returns the filaments used in this print with their slot IDs, types, colors,
    and usage amounts. This can be compared with current AMS state before reprinting.

    Args:
        archive_id: The archive ID
        plate_id: Optional plate index to filter filaments for (for multi-plate files)
    """
    import defusedxml.ElementTree as ET

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    filaments = []

    try:
        with zipfile.ZipFile(file_path, "r") as zf:
            # Parse slice_info.config for filament requirements
            if "Metadata/slice_info.config" in zf.namelist():
                content = zf.read("Metadata/slice_info.config").decode()
                root = ET.fromstring(content)

                # If plate_id is specified, find filaments for that specific plate
                if plate_id is not None:
                    # Find the plate element with matching index
                    for plate_elem in root.findall(".//plate"):
                        plate_index = None
                        for meta in plate_elem.findall("metadata"):
                            if meta.get("key") == "index":
                                try:
                                    plate_index = int(meta.get("value", "0"))
                                except ValueError:
                                    pass  # Skip plate with non-numeric index metadata
                                break

                        if plate_index == plate_id:
                            # Extract filaments from this plate element
                            for filament_elem in plate_elem.findall("filament"):
                                filament_id = filament_elem.get("id")
                                filament_type = filament_elem.get("type", "")
                                filament_color = filament_elem.get("color", "")
                                used_g = filament_elem.get("used_g", "0")
                                used_m = filament_elem.get("used_m", "0")

                                tray_info_idx = filament_elem.get("tray_info_idx", "")

                                try:
                                    used_grams = float(used_g)
                                except (ValueError, TypeError):
                                    used_grams = 0

                                if used_grams > 0 and filament_id:
                                    filaments.append(
                                        {
                                            "slot_id": int(filament_id),
                                            "type": filament_type,
                                            "color": filament_color,
                                            "used_grams": round(used_grams, 1),
                                            "used_meters": float(used_m) if used_m else 0,
                                            "tray_info_idx": tray_info_idx,
                                        }
                                    )
                            break
                else:
                    # No plate_id specified - extract all filaments with used_g > 0
                    # This is the legacy behavior for single-plate files
                    for filament_elem in root.findall(".//filament"):
                        filament_id = filament_elem.get("id")
                        filament_type = filament_elem.get("type", "")
                        filament_color = filament_elem.get("color", "")
                        used_g = filament_elem.get("used_g", "0")
                        used_m = filament_elem.get("used_m", "0")

                        tray_info_idx = filament_elem.get("tray_info_idx", "")

                        # Only include filaments that are actually used
                        try:
                            used_grams = float(used_g)
                        except (ValueError, TypeError):
                            used_grams = 0

                        if used_grams > 0 and filament_id:
                            filaments.append(
                                {
                                    "slot_id": int(filament_id),
                                    "type": filament_type,
                                    "color": filament_color,
                                    "used_grams": round(used_grams, 1),
                                    "used_meters": float(used_m) if used_m else 0,
                                    "tray_info_idx": tray_info_idx,
                                }
                            )

            # Sort by slot ID
            filaments.sort(key=lambda x: x["slot_id"])

            # Enrich with nozzle mapping for dual-nozzle printers
            nozzle_mapping = extract_nozzle_mapping_from_3mf(zf)
            if nozzle_mapping:
                for filament in filaments:
                    filament["nozzle_id"] = nozzle_mapping.get(filament["slot_id"])

    except Exception as e:
        logger.warning("Failed to parse filament requirements from archive %s: %s", archive_id, e)

    return {
        "archive_id": archive_id,
        "filename": archive.filename,
        "plate_id": plate_id,
        "filaments": filaments,
    }


@router.post("/{archive_id}/reprint")
async def reprint_archive(
    archive_id: int,
    printer_id: int,
    body: ReprintRequest | None = None,
    db: AsyncSession = Depends(get_db),
    auth_result: tuple[User | None, bool] = Depends(
        require_ownership_permission(
            Permission.ARCHIVES_REPRINT_ALL,
            Permission.ARCHIVES_REPRINT_OWN,
        )
    ),
):
    """Dispatch an archived 3MF file for send/start on a printer."""
    from backend.app.models.printer import Printer
    from backend.app.services.background_dispatch import DispatchEnqueueRejected, background_dispatch
    from backend.app.services.printer_manager import printer_manager

    user, can_modify_all = auth_result

    # Use defaults if no body provided
    if body is None:
        body = ReprintRequest()

    # Get archive
    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    # Ownership check
    if not can_modify_all:
        if archive.created_by_id != user.id:
            raise HTTPException(403, "You can only reprint your own archives")

    # Get printer
    result = await db.execute(select(Printer).where(Printer.id == printer_id))
    printer = result.scalar_one_or_none()
    if not printer:
        raise HTTPException(404, "Printer not found")

    # Check printer is connected
    if not printer_manager.is_connected(printer_id):
        raise HTTPException(400, "Printer is not connected")

    if not archive.file_path:
        raise HTTPException(
            404,
            "No 3MF file available for this archive. "
            "The file could not be downloaded from the printer when the print was recorded.",
        )

    # Validate archive file exists
    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    plate_name = body.plate_name
    if not plate_name and body.plate_id is not None:
        plate_name = f"Plate {body.plate_id}"

    dispatch_source_name = archive.filename
    if plate_name:
        dispatch_source_name = f"{archive.filename} • {plate_name}"

    try:
        dispatch_result = await background_dispatch.dispatch_reprint_archive(
            archive_id=archive_id,
            archive_name=dispatch_source_name,
            printer_id=printer_id,
            printer_name=printer.name,
            options=body.model_dump(exclude_none=True),
            requested_by_user_id=user.id if user else None,
            requested_by_username=user.username if user else None,
        )
    except DispatchEnqueueRejected as e:
        raise HTTPException(status_code=409, detail=str(e)) from e

    logger.info(
        "Dispatched reprint archive %s for printer %s (dispatch_job_id=%s, dispatch_position=%s)",
        archive_id,
        printer_id,
        dispatch_result["dispatch_job_id"],
        dispatch_result["dispatch_position"],
    )

    return {
        "status": "dispatched",
        "printer_id": printer_id,
        "archive_id": archive_id,
        "filename": archive.filename,
        "dispatch_job_id": dispatch_result["dispatch_job_id"],
        "dispatch_position": dispatch_result["dispatch_position"],
    }


# =============================================================================
# Project Page API
# =============================================================================


@router.get("/{archive_id}/project-page")
async def get_project_page(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Get the project page data from the 3MF file."""
    from backend.app.schemas.archive import ProjectPageResponse
    from backend.app.services.archive import ProjectPageParser

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    parser = ProjectPageParser(file_path)
    data = parser.parse(archive_id)

    return ProjectPageResponse(**data)


@router.patch("/{archive_id}/project-page")
async def update_project_page(
    archive_id: int,
    update_data: dict,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_OWN),
):
    """Update project page metadata in the 3MF file."""
    from backend.app.services.archive import ProjectPageParser

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    parser = ProjectPageParser(file_path)
    success = parser.update_metadata(update_data)

    if not success:
        raise HTTPException(500, "Failed to update project page")

    # Return updated data
    data = parser.parse(archive_id)
    return data


@router.get("/{archive_id}/project-image/{image_path:path}")
async def get_project_image(
    archive_id: int,
    image_path: str,
    db: AsyncSession = Depends(get_db),
    _: None = RequireCameraStreamTokenIfAuthEnabled,
):
    """Get an image from the 3MF project page.

    Requires a stream token query param (?token=xxx) when auth is enabled.
    """
    from backend.app.services.archive import ProjectPageParser

    service = ArchiveService(db)
    archive = await service.get_archive(archive_id)
    if not archive:
        raise HTTPException(404, "Archive not found")

    file_path = settings.base_dir / archive.file_path
    if not file_path.is_file():
        raise HTTPException(404, "Archive file not found")

    parser = ProjectPageParser(file_path)
    result = parser.get_image(image_path)

    if not result:
        raise HTTPException(404, "Image not found in 3MF file")

    image_data, content_type = result
    return Response(
        content=image_data,
        media_type=content_type,
        headers={"Cache-Control": "max-age=3600"},
    )


# =============================================================================
# Source 3MF API (Original Project Files)
# =============================================================================


@router.post("/{archive_id}/source")
async def upload_source_3mf(
    archive_id: int,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_OWN),
):
    """Upload the original source 3MF project file for an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not file.filename or not file.filename.endswith(".3mf"):
        raise HTTPException(400, "File must be a .3mf file")

    # Get archive directory and create source subdirectory
    file_path = settings.base_dir / archive.file_path
    archive_dir = file_path.parent
    source_dir = archive_dir / "source"
    source_dir.mkdir(exist_ok=True)

    # Delete old source file if exists
    if archive.source_3mf_path:
        old_source_path = settings.base_dir / archive.source_3mf_path
        if old_source_path.exists():
            old_source_path.unlink()

    # Save the source 3MF file - preserve original filename
    source_filename = file.filename
    source_path = source_dir / source_filename

    content = await file.read()
    source_path.write_bytes(content)

    # Update archive with source path (relative to base_dir)
    archive.source_3mf_path = str(source_path.relative_to(settings.base_dir))

    await db.commit()
    await db.refresh(archive)

    return {
        "status": "uploaded",
        "source_3mf_path": archive.source_3mf_path,
        "filename": source_filename,
    }


@router.get("/{archive_id}/source")
async def download_source_3mf(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Download the source 3MF project file."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.source_3mf_path:
        raise HTTPException(404, "No source 3MF attached to this archive")

    source_path = settings.base_dir / archive.source_3mf_path
    if not source_path.exists():
        raise HTTPException(404, "Source 3MF file not found on disk")

    # Use the actual filename from the path
    filename = source_path.name

    return FileResponse(
        path=source_path,
        filename=filename,
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
    )


@router.get("/{archive_id}/source/{filename}")
async def download_source_3mf_for_slicer(
    archive_id: int,
    filename: str,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Download source 3MF with filename in URL."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.source_3mf_path:
        raise HTTPException(404, "No source 3MF attached to this archive")

    source_path = settings.base_dir / archive.source_3mf_path
    if not source_path.exists():
        raise HTTPException(404, "Source 3MF file not found on disk")

    return FileResponse(
        path=source_path,
        filename=filename if filename.endswith(".3mf") else f"{filename}.3mf",
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
    )


@router.post("/{archive_id}/source-slicer-token")
async def create_source_slicer_token(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Create a short-lived download token for opening source 3MF in slicer."""
    from backend.app.core.auth import create_slicer_download_token

    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")
    if not archive.source_3mf_path:
        raise HTTPException(404, "No source 3MF attached to this archive")

    token = create_slicer_download_token("source", archive_id)
    return {"token": token}


@router.get("/{archive_id}/source-dl/{token}/{filename}")
async def download_source_3mf_for_slicer_with_token(
    archive_id: int,
    token: str,
    filename: str,
    db: AsyncSession = Depends(get_db),
):
    """Download source 3MF using a slicer download token.

    Token-authenticated (no auth headers needed). The token is short-lived
    and single-use, created by POST /{archive_id}/source-slicer-token.
    """
    from backend.app.core.auth import verify_slicer_download_token

    if not verify_slicer_download_token(token, "source", archive_id):
        raise HTTPException(403, "Invalid or expired download token")

    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.source_3mf_path:
        raise HTTPException(404, "No source 3MF attached to this archive")

    source_path = settings.base_dir / archive.source_3mf_path
    if not source_path.exists():
        raise HTTPException(404, "Source 3MF file not found on disk")

    return FileResponse(
        path=source_path,
        filename=filename if filename.endswith(".3mf") else f"{filename}.3mf",
        media_type="application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
    )


@router.post("/upload-source")
async def upload_source_3mf_by_name(
    file: UploadFile = File(...),
    print_name: str = Query(None, description="Match archive by print name"),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_ALL),
):
    """Upload source 3MF and match to archive by print name.

    This endpoint is designed for slicer post-processing scripts.
    It finds the most recent archive matching the print name and attaches the source.
    """
    if not file.filename or not file.filename.endswith(".3mf"):
        raise HTTPException(400, "File must be a .3mf file")

    # Derive print name from filename if not provided
    if not print_name:
        # Remove .3mf extension and common suffixes
        print_name = file.filename.rsplit(".3mf", 1)[0]
        # Remove _source suffix if present
        if print_name.endswith("_source"):
            print_name = print_name[:-7]

    # Find matching archive - try exact match first, then fuzzy
    result = await db.execute(
        select(PrintArchive)
        .where(PrintArchive.print_name == print_name)
        .order_by(PrintArchive.created_at.desc())
        .limit(1)
    )
    archive = result.scalar_one_or_none()

    if not archive:
        # Try matching filename without .gcode.3mf
        result = await db.execute(
            select(PrintArchive)
            .where(PrintArchive.filename.like(f"{print_name}%"))
            .order_by(PrintArchive.created_at.desc())
            .limit(1)
        )
        archive = result.scalar_one_or_none()

    if not archive:
        # Try case-insensitive partial match on print_name
        result = await db.execute(
            select(PrintArchive)
            .where(PrintArchive.print_name.ilike(f"%{print_name}%"))
            .order_by(PrintArchive.created_at.desc())
            .limit(1)
        )
        archive = result.scalar_one_or_none()

    if not archive:
        raise HTTPException(404, f"No archive found matching '{print_name}'")

    # Get archive directory and create source subdirectory
    file_path = settings.base_dir / archive.file_path
    archive_dir = file_path.parent
    source_dir = archive_dir / "source"
    source_dir.mkdir(exist_ok=True)

    # Delete old source file if exists
    if archive.source_3mf_path:
        old_source_path = settings.base_dir / archive.source_3mf_path
        if old_source_path.exists():
            old_source_path.unlink()

    # Save the source 3MF file - preserve original filename
    source_filename = file.filename
    source_path = source_dir / source_filename

    content = await file.read()
    source_path.write_bytes(content)

    # Update archive with source path
    archive.source_3mf_path = str(source_path.relative_to(settings.base_dir))
    await db.commit()
    await db.refresh(archive)

    return {
        "status": "uploaded",
        "archive_id": archive.id,
        "archive_name": archive.print_name or archive.filename,
        "source_3mf_path": archive.source_3mf_path,
        "filename": source_filename,
    }


@router.delete("/{archive_id}/source")
async def delete_source_3mf(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_DELETE_OWN),
):
    """Delete the source 3MF project file from an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.source_3mf_path:
        raise HTTPException(404, "No source 3MF attached to this archive")

    # Delete the file
    source_path = settings.base_dir / archive.source_3mf_path
    if source_path.exists():
        source_path.unlink()

    # Clear the path in database
    archive.source_3mf_path = None
    await db.commit()

    return {"status": "deleted"}


# =============================================================================
# F3D API (Fusion 360 Design Files)
# =============================================================================


@router.post("/{archive_id}/f3d")
async def upload_f3d(
    archive_id: int,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_UPDATE_OWN),
):
    """Upload a Fusion 360 design file for an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not file.filename or not file.filename.endswith(".f3d"):
        raise HTTPException(400, "File must be a .f3d file")

    # Get archive directory and create f3d subdirectory
    file_path = settings.base_dir / archive.file_path
    archive_dir = file_path.parent
    f3d_dir = archive_dir / "f3d"
    f3d_dir.mkdir(exist_ok=True)

    # Delete old F3D file if exists
    if archive.f3d_path:
        old_f3d_path = settings.base_dir / archive.f3d_path
        if old_f3d_path.exists():
            old_f3d_path.unlink()

    # Save the F3D file - preserve original filename
    f3d_filename = file.filename
    f3d_path = f3d_dir / f3d_filename

    content = await file.read()
    f3d_path.write_bytes(content)

    # Update archive with F3D path (relative to base_dir)
    archive.f3d_path = str(f3d_path.relative_to(settings.base_dir))

    await db.commit()
    await db.refresh(archive)

    return {
        "status": "uploaded",
        "f3d_path": archive.f3d_path,
        "filename": f3d_filename,
    }


@router.get("/{archive_id}/f3d")
async def download_f3d(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_READ),
):
    """Download the Fusion 360 design file."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.f3d_path:
        raise HTTPException(404, "No F3D file attached to this archive")

    f3d_path = settings.base_dir / archive.f3d_path
    if not f3d_path.exists():
        raise HTTPException(404, "F3D file not found on disk")

    # Use the actual filename from the path
    filename = f3d_path.name

    return FileResponse(
        path=f3d_path,
        filename=filename,
        media_type="application/octet-stream",
    )


@router.delete("/{archive_id}/f3d")
async def delete_f3d(
    archive_id: int,
    db: AsyncSession = Depends(get_db),
    _: User | None = RequirePermissionIfAuthEnabled(Permission.ARCHIVES_DELETE_OWN),
):
    """Delete the Fusion 360 design file from an archive."""
    result = await db.execute(select(PrintArchive).where(PrintArchive.id == archive_id))
    archive = result.scalar_one_or_none()
    if not archive:
        raise HTTPException(404, "Archive not found")

    if not archive.f3d_path:
        raise HTTPException(404, "No F3D file attached to this archive")

    # Delete the file
    f3d_path = settings.base_dir / archive.f3d_path
    if f3d_path.exists():
        f3d_path.unlink()

    # Clear the path in database
    archive.f3d_path = None
    await db.commit()

    return {"status": "deleted"}