"""Unit tests for bulk spool creation.

Tests:
- SpoolBulkCreate schema validation (quantity bounds)
- Bulk create endpoint creates the requested number of spools
- Bulk create with quantity=1 (single spool)
- Bulk create returns spools with k_profiles loaded
"""

from unittest.mock import AsyncMock, MagicMock

import pytest
from pydantic import ValidationError

from backend.app.schemas.spool import SpoolBulkCreate, SpoolCreate

# ── Schema Validation ──────────────────────────────────────────────────────


class TestSpoolBulkCreateSchema:
    """Tests for the SpoolBulkCreate Pydantic model."""

    def test_default_quantity_is_1(self):
        data = SpoolBulkCreate(spool=SpoolCreate(material="PLA"))
        assert data.quantity == 1

    def test_quantity_within_range(self):
        data = SpoolBulkCreate(spool=SpoolCreate(material="PLA"), quantity=50)
        assert data.quantity == 50

    def test_quantity_max_100(self):
        data = SpoolBulkCreate(spool=SpoolCreate(material="PLA"), quantity=100)
        assert data.quantity == 100

    def test_quantity_zero_rejected(self):
        with pytest.raises(ValidationError, match="greater than or equal to 1"):
            SpoolBulkCreate(spool=SpoolCreate(material="PLA"), quantity=0)

    def test_quantity_negative_rejected(self):
        with pytest.raises(ValidationError, match="greater than or equal to 1"):
            SpoolBulkCreate(spool=SpoolCreate(material="PLA"), quantity=-1)

    def test_quantity_over_100_rejected(self):
        with pytest.raises(ValidationError, match="less than or equal to 100"):
            SpoolBulkCreate(spool=SpoolCreate(material="PLA"), quantity=101)

    def test_spool_fields_preserved(self):
        data = SpoolBulkCreate(
            spool=SpoolCreate(
                material="PETG",
                brand="Polymaker",
                subtype="Basic",
                color_name="Red",
                rgba="FF0000FF",
                label_weight=750,
                note="Test batch",
            ),
            quantity=5,
        )
        assert data.spool.material == "PETG"
        assert data.spool.brand == "Polymaker"
        assert data.spool.label_weight == 750
        assert data.spool.note == "Test batch"
        assert data.quantity == 5

    def test_spool_without_slicer_filament_is_stock(self):
        """A spool without slicer_filament is a 'stock' spool (computed, not stored)."""
        data = SpoolBulkCreate(
            spool=SpoolCreate(material="PLA", label_weight=1000),
            quantity=3,
        )
        assert data.spool.slicer_filament is None

    def test_spool_with_slicer_filament_is_configured(self):
        data = SpoolBulkCreate(
            spool=SpoolCreate(material="PLA", slicer_filament="GFL99"),
            quantity=2,
        )
        assert data.spool.slicer_filament == "GFL99"

    def test_material_required(self):
        with pytest.raises(ValidationError):
            SpoolBulkCreate(spool=SpoolCreate(material=""), quantity=1)


# ── Endpoint Logic ─────────────────────────────────────────────────────────


def _make_mock_spool(spool_id):
    """Create a mock Spool ORM object."""
    spool = MagicMock()
    spool.id = spool_id
    spool.material = "PLA"
    spool.label_weight = 1000
    spool.k_profiles = []
    return spool


class TestBulkCreateEndpoint:
    """Tests for the bulk_create_spools endpoint logic."""

    @pytest.mark.asyncio
    async def test_creates_requested_number_of_spools(self):
        """Verify N spools are created and added to the session."""
        from backend.app.api.routes.inventory import bulk_create_spools

        data = SpoolBulkCreate(
            spool=SpoolCreate(material="PLA", brand="Test", label_weight=1000),
            quantity=3,
        )

        db = AsyncMock()
        added_objects = []
        db.add = lambda obj: added_objects.append(obj)

        # Mock the re-fetch query
        mock_result = MagicMock()
        mock_spools = [_make_mock_spool(i + 1) for i in range(3)]
        mock_result.scalars.return_value.all.return_value = mock_spools
        db.execute = AsyncMock(return_value=mock_result)

        result = await bulk_create_spools(data=data, db=db, _=None)

        assert len(result) == 3
        assert len(added_objects) == 3
        db.commit.assert_awaited_once()

    @pytest.mark.asyncio
    async def test_single_quantity_creates_one_spool(self):
        """Bulk create with quantity=1 should create exactly one spool."""
        from backend.app.api.routes.inventory import bulk_create_spools

        data = SpoolBulkCreate(
            spool=SpoolCreate(material="PETG"),
            quantity=1,
        )

        db = AsyncMock()
        added_objects = []
        db.add = lambda obj: added_objects.append(obj)

        mock_result = MagicMock()
        mock_spools = [_make_mock_spool(1)]
        mock_result.scalars.return_value.all.return_value = mock_spools
        db.execute = AsyncMock(return_value=mock_result)

        result = await bulk_create_spools(data=data, db=db, _=None)

        assert len(result) == 1
        assert len(added_objects) == 1

    @pytest.mark.asyncio
    async def test_all_spools_have_same_fields(self):
        """All created spools should have identical field values."""
        from backend.app.api.routes.inventory import bulk_create_spools

        data = SpoolBulkCreate(
            spool=SpoolCreate(
                material="ABS",
                brand="Bambu Lab",
                color_name="Black",
                rgba="000000FF",
                label_weight=750,
            ),
            quantity=3,
        )

        db = AsyncMock()
        added_objects = []
        db.add = lambda obj: added_objects.append(obj)

        mock_result = MagicMock()
        mock_spools = [_make_mock_spool(i + 1) for i in range(3)]
        mock_result.scalars.return_value.all.return_value = mock_spools
        db.execute = AsyncMock(return_value=mock_result)

        await bulk_create_spools(data=data, db=db, _=None)

        # All added Spool objects should have the same material/brand/color
        for spool_obj in added_objects:
            assert spool_obj.material == "ABS"
            assert spool_obj.brand == "Bambu Lab"
            assert spool_obj.color_name == "Black"
            assert spool_obj.label_weight == 750