"""
Bambu Lab Cloud API Service

Handles authentication and profile management with Bambu Lab's cloud services.
"""

import logging
from datetime import datetime, timedelta

import httpx

logger = logging.getLogger(__name__)

BAMBU_API_BASE = "https://api.bambulab.com"
BAMBU_API_BASE_CN = "https://api.bambulab.cn"


class BambuCloudError(Exception):
    """Base exception for Bambu Cloud errors."""

    pass


class BambuCloudAuthError(BambuCloudError):
    """Authentication related errors."""

    pass


class BambuCloudService:
    """Service for interacting with Bambu Lab Cloud API."""

    def __init__(self, region: str = "global"):
        self.base_url = BAMBU_API_BASE if region == "global" else BAMBU_API_BASE_CN
        self.access_token: str | None = None
        self.refresh_token: str | None = None
        self.token_expiry: datetime | None = None
        self._client = httpx.AsyncClient(timeout=30.0)

    @property
    def is_authenticated(self) -> bool:
        """Check if we have a valid token."""
        if not self.access_token:
            return False
        return not (self.token_expiry and datetime.now() > self.token_expiry)

    def _get_headers(self) -> dict:
        """Get headers for authenticated requests."""
        headers = {
            "Content-Type": "application/json",
            "User-Agent": "Bambuddy/1.0",
        }
        if self.access_token:
            headers["Authorization"] = f"Bearer {self.access_token}"
        return headers

    async def login_request(self, email: str, password: str) -> dict:
        """
        Initiate login - this will trigger a verification code email.

        Returns dict with login status and whether verification is needed.
        """
        try:
            response = await self._client.post(
                f"{self.base_url}/v1/user-service/user/login",
                headers={"Content-Type": "application/json"},
                json={
                    "account": email,
                    "password": password,
                },
            )

            data = response.json()

            if response.status_code == 200:
                # Check if we need verification code
                # Bambu API returns loginType or may require tfaKey
                if data.get("loginType") == "verifyCode" or "tfaKey" in data:
                    return {"success": False, "needs_verification": True, "message": "Verification code sent to email"}

                # Direct login success (rare, usually needs 2FA)
                if "accessToken" in data:
                    self._set_tokens(data)
                    return {"success": True, "needs_verification": False, "message": "Login successful"}

            # Handle specific error codes
            error_msg = data.get("message") or data.get("error") or "Login failed"
            return {"success": False, "needs_verification": False, "message": error_msg}

        except Exception as e:
            logger.error(f"Login request failed: {e}")
            raise BambuCloudAuthError(f"Login request failed: {e}")

    async def verify_code(self, email: str, code: str) -> dict:
        """
        Complete login with verification code.
        """
        try:
            response = await self._client.post(
                f"{self.base_url}/v1/user-service/user/login",
                headers={"Content-Type": "application/json"},
                json={
                    "account": email,
                    "code": code,
                },
            )

            data = response.json()

            if response.status_code == 200 and "accessToken" in data:
                self._set_tokens(data)
                return {"success": True, "message": "Login successful"}

            return {"success": False, "message": data.get("message", "Verification failed")}

        except Exception as e:
            logger.error(f"Verification failed: {e}")
            raise BambuCloudAuthError(f"Verification failed: {e}")

    def _set_tokens(self, data: dict):
        """Set tokens from login response."""
        self.access_token = data.get("accessToken")
        self.refresh_token = data.get("refreshToken")
        # Token typically valid for ~3 months, but we'll refresh more often
        self.token_expiry = datetime.now() + timedelta(days=30)

    def set_token(self, access_token: str):
        """Set access token directly (for stored tokens)."""
        self.access_token = access_token
        self.token_expiry = datetime.now() + timedelta(days=30)

    def logout(self):
        """Clear authentication state."""
        self.access_token = None
        self.refresh_token = None
        self.token_expiry = None

    async def get_user_profile(self) -> dict:
        """Get user profile information."""
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.get(
                f"{self.base_url}/v1/design-user-service/my/preference", headers=self._get_headers()
            )

            if response.status_code == 200:
                return response.json()

            raise BambuCloudError(f"Failed to get profile: {response.status_code}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def get_slicer_settings(self, version: str = "02.04.00.70") -> dict:
        """
        Get all slicer settings (filament, printer, process presets).

        Args:
            version: Slicer version string
        """
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.get(
                f"{self.base_url}/v1/iot-service/api/slicer/setting",
                headers=self._get_headers(),
                params={"version": version},
            )

            data = response.json()

            if response.status_code == 200:
                return data

            raise BambuCloudError(f"Failed to get settings: {response.status_code}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def get_setting_detail(self, setting_id: str) -> dict:
        """Get detailed information for a specific setting/preset."""
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.get(
                f"{self.base_url}/v1/iot-service/api/slicer/setting/{setting_id}", headers=self._get_headers()
            )

            if response.status_code == 200:
                return response.json()

            raise BambuCloudError(f"Failed to get setting detail: {response.status_code}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def create_setting(
        self, preset_type: str, name: str, base_id: str, setting: dict, version: str = "2.0.0.0"
    ) -> dict:
        """
        Create a new slicer preset/setting.

        Args:
            preset_type: Type of preset - "filament", "print", or "printer"
            name: Display name for the preset
            base_id: Base preset ID to inherit from (e.g., "GFSA00")
            setting: Dict of setting key-value pairs (only modified values from base)
            version: Version string for the preset (default: "2.0.0.0")

        Returns:
            Created preset data including the new setting_id
        """
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            # Add timestamp if not present
            import time

            if "updated_time" not in setting:
                setting["updated_time"] = str(int(time.time()))

            payload = {
                "type": preset_type,
                "name": name,
                "version": version,
                "base_id": base_id,
                "setting": setting,
            }

            response = await self._client.post(
                f"{self.base_url}/v1/iot-service/api/slicer/setting", headers=self._get_headers(), json=payload
            )

            data = response.json()

            if response.status_code in (200, 201):
                return data

            error_msg = data.get("message") or data.get("error") or f"HTTP {response.status_code}"
            raise BambuCloudError(f"Failed to create setting: {error_msg}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def update_setting(self, setting_id: str, name: str | None = None, setting: dict | None = None) -> dict:
        """
        Update an existing slicer preset/setting.

        Note: Bambu Cloud API doesn't support true updates. Instead, we:
        1. Fetch the current setting metadata (type, base_id, version)
        2. Use the provided settings as the new complete settings (NOT merged)
        3. Delete the old setting first (to avoid name conflicts)
        4. Create a new setting via POST

        Args:
            setting_id: ID of the preset to update
            name: New display name (optional)
            setting: Dict of setting key-value pairs - this REPLACES the old settings entirely

        Returns:
            Updated preset data with new setting_id
        """
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            # Fetch current setting to get metadata (type, base_id, version)
            current = await self.get_setting_detail(setting_id)
            preset_type = current.get("type", "filament")

            # Use provided settings directly (complete replacement, not merge)
            # This allows the frontend to edit the full settings JSON
            if setting is not None:
                updated_setting = setting.copy()
            else:
                updated_setting = current.get("setting", {}).copy()

            # Extract name from settings_id field in the JSON, or use provided name, or fall back to current
            # The settings_id field contains the name in quotes, e.g., '"My Preset Name"'
            settings_id_key = {
                "filament": "filament_settings_id",
                "print": "print_settings_id",
                "printer": "printer_settings_id",
            }.get(preset_type, "filament_settings_id")

            settings_id_value = updated_setting.get(settings_id_key, "")
            if settings_id_value:
                # Remove surrounding quotes if present (e.g., '"foo"' -> 'foo')
                updated_name = settings_id_value.strip('"')
            elif name is not None:
                updated_name = name
            else:
                updated_name = current.get("name", "Untitled")

            # Update the timestamp
            import time

            updated_setting["updated_time"] = str(int(time.time()))

            # Ensure settings_id field matches the name
            updated_setting[settings_id_key] = f'"{updated_name}"'

            # Delete the old setting FIRST to avoid name conflicts
            await self.delete_setting(setting_id)

            # Create new setting via POST
            payload = {
                "type": preset_type,
                "name": updated_name,
                "version": current.get("version", "2.0.0.0"),
                "base_id": current.get("base_id", ""),
                "setting": updated_setting,
            }

            response = await self._client.post(
                f"{self.base_url}/v1/iot-service/api/slicer/setting", headers=self._get_headers(), json=payload
            )

            data = response.json()

            if response.status_code == 200:
                return data

            error_msg = data.get("message") or data.get("error") or f"HTTP {response.status_code}"
            raise BambuCloudError(f"Failed to update setting: {error_msg}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def delete_setting(self, setting_id: str) -> dict:
        """
        Delete a slicer preset/setting.

        Args:
            setting_id: ID of the preset to delete

        Returns:
            Deletion confirmation
        """
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.delete(
                f"{self.base_url}/v1/iot-service/api/slicer/setting/{setting_id}", headers=self._get_headers()
            )

            if response.status_code in (200, 204):
                return {"success": True, "message": "Setting deleted"}

            data = response.json() if response.content else {}
            error_msg = data.get("message") or data.get("error") or f"HTTP {response.status_code}"
            raise BambuCloudError(f"Failed to delete setting: {error_msg}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def get_devices(self) -> dict:
        """Get list of bound devices."""
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.get(
                f"{self.base_url}/v1/iot-service/api/user/bind", headers=self._get_headers()
            )

            if response.status_code == 200:
                return response.json()

            raise BambuCloudError(f"Failed to get devices: {response.status_code}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def get_firmware_version(self, device_id: str) -> dict:
        """
        Get firmware version info for a device.

        Returns dict with:
        - current_version: Installed firmware version
        - latest_version: Latest available firmware version
        - update_available: Boolean indicating if update is available
        - release_notes: Release notes for latest version
        """
        if not self.is_authenticated:
            raise BambuCloudAuthError("Not authenticated")

        try:
            response = await self._client.get(
                f"{self.base_url}/v1/iot-service/api/user/device/version",
                headers=self._get_headers(),
                params={"device_id": device_id},
            )

            if response.status_code == 200:
                data = response.json()
                # API wraps response in 'data' field
                return data.get("data", data)

            raise BambuCloudError(f"Failed to get firmware version: {response.status_code}")

        except httpx.RequestError as e:
            raise BambuCloudError(f"Request failed: {e}")

    async def close(self):
        """Close the HTTP client."""
        await self._client.aclose()


# Singleton instance
_cloud_service: BambuCloudService | None = None


def get_cloud_service() -> BambuCloudService:
    """Get the singleton cloud service instance."""
    global _cloud_service
    if _cloud_service is None:
        _cloud_service = BambuCloudService()
    return _cloud_service