"""
Daily.co API Client

Complete async client for Daily.co REST API with Pydantic models.

Reference: https://docs.daily.co/reference/rest-api
"""

from http import HTTPStatus
from typing import Any, Literal
from uuid import UUID

import httpx
import structlog

from reflector.utils.string import NonEmptyString

from .requests import (
    CreateMeetingTokenRequest,
    CreateRoomRequest,
    CreateWebhookRequest,
    UpdateWebhookRequest,
)
from .responses import (
    MeetingParticipantsResponse,
    MeetingResponse,
    MeetingTokenResponse,
    RecordingResponse,
    RoomPresenceResponse,
    RoomResponse,
    WebhookResponse,
)

logger = structlog.get_logger(__name__)

RecordingType = Literal["cloud", "raw-tracks"]


class DailyApiError(Exception):
    """Daily.co API error with full request/response context."""

    def __init__(self, operation: str, response: httpx.Response):
        self.operation = operation
        self.response = response
        self.status_code = response.status_code
        self.response_body = response.text
        self.url = str(response.url)
        self.request_body = (
            response.request.content.decode() if response.request.content else None
        )

        super().__init__(
            f"Daily.co API error: {operation} failed with status {self.status_code}: {response.text}"
        )


class DailyApiClient:
    """
    Complete async client for Daily.co REST API.

    Usage:
        # Direct usage
        client = DailyApiClient(api_key="your_api_key")
        room = await client.create_room(CreateRoomRequest(name="my-room"))
        await client.close()  # Clean up when done

        # Context manager (recommended)
        async with DailyApiClient(api_key="your_api_key") as client:
            room = await client.create_room(CreateRoomRequest(name="my-room"))
    """

    BASE_URL = "https://api.daily.co/v1"
    DEFAULT_TIMEOUT = 10.0

    def __init__(
        self,
        api_key: NonEmptyString,
        webhook_secret: NonEmptyString | None = None,
        timeout: float = DEFAULT_TIMEOUT,
        base_url: NonEmptyString | None = None,
    ):
        """
        Initialize Daily.co API client.

        Args:
            api_key: Daily.co API key (Bearer token)
            webhook_secret: Base64-encoded HMAC secret for webhook verification.
                Must match the 'hmac' value provided when creating webhooks.
                Generate with: base64.b64encode(os.urandom(32)).decode()
            timeout: Default request timeout in seconds
            base_url: Override base URL (for testing)
        """
        self.api_key = api_key
        self.webhook_secret = webhook_secret
        self.timeout = timeout
        self.base_url = base_url or self.BASE_URL

        self.headers = {
            "Authorization": f"Bearer {api_key}",
            "Content-Type": "application/json",
        }

        self._client: httpx.AsyncClient | None = None

    async def __aenter__(self):
        return self

    async def __aexit__(self, exc_type, exc_val, exc_tb):
        await self.close()

    async def _get_client(self) -> httpx.AsyncClient:
        if self._client is None:
            self._client = httpx.AsyncClient(timeout=self.timeout)
        return self._client

    async def close(self):
        if self._client is not None:
            await self._client.aclose()
            self._client = None

    async def _handle_response(
        self, response: httpx.Response, operation: str
    ) -> dict[str, Any]:
        """
        Handle API response with error logging.

        Args:
            response: HTTP response
            operation: Operation name for logging (e.g., "create_room")

        Returns:
            Parsed JSON response

        Raises:
            DailyApiError: If request failed with full context
        """
        if response.status_code >= 400:
            logger.error(
                f"Daily.co API error: {operation}",
                status_code=response.status_code,
                response_body=response.text,
                request_body=response.request.content.decode()
                if response.request.content
                else None,
                url=str(response.url),
            )
            raise DailyApiError(operation, response)

        return response.json()

    # ============================================================================
    # ROOMS
    # ============================================================================

    async def create_room(self, request: CreateRoomRequest) -> RoomResponse:
        """
        Create a new Daily.co room.

        Reference: https://docs.daily.co/reference/rest-api/rooms/create-room

        Args:
            request: Room creation request with name, privacy, and properties

        Returns:
            Created room data including URL and ID

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.post(
            f"{self.base_url}/rooms",
            headers=self.headers,
            json=request.model_dump(exclude_none=True),
        )

        data = await self._handle_response(response, "create_room")
        return RoomResponse(**data)

    async def get_room(self, room_name: NonEmptyString) -> RoomResponse:
        """
        Get room configuration.

        Args:
            room_name: Daily.co room name

        Returns:
            Room configuration data

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/rooms/{room_name}",
            headers=self.headers,
        )

        data = await self._handle_response(response, "get_room")
        return RoomResponse(**data)

    async def get_room_presence(
        self, room_name: NonEmptyString
    ) -> RoomPresenceResponse:
        """
        Get current participants in a room (real-time presence).

        Reference: https://docs.daily.co/reference/rest-api/rooms/get-room-presence

        Args:
            room_name: Daily.co room name

        Returns:
            List of currently present participants with join time and duration

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/rooms/{room_name}/presence",
            headers=self.headers,
        )

        data = await self._handle_response(response, "get_room_presence")
        return RoomPresenceResponse(**data)

    async def delete_room(self, room_name: NonEmptyString) -> None:
        """
        Delete a room (idempotent - succeeds even if room doesn't exist).

        Reference: https://docs.daily.co/reference/rest-api/rooms/delete-room

        Args:
            room_name: Daily.co room name

        Raises:
            httpx.HTTPStatusError: If API request fails (except 404)
        """
        client = await self._get_client()
        response = await client.delete(
            f"{self.base_url}/rooms/{room_name}",
            headers=self.headers,
        )

        # Idempotent delete - 404 means already deleted
        if response.status_code == HTTPStatus.NOT_FOUND:
            logger.debug("Room not found (already deleted)", room_name=room_name)
            return

        await self._handle_response(response, "delete_room")

    # ============================================================================
    # MEETINGS
    # ============================================================================

    async def get_meeting(self, meeting_id: NonEmptyString) -> MeetingResponse:
        """
        Get full meeting information including participants.

        Reference: https://docs.daily.co/reference/rest-api/meetings/get-meeting-information

        Args:
            meeting_id: Daily.co meeting/session ID

        Returns:
            Meeting metadata including room, duration, participants, and status

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/meetings/{meeting_id}",
            headers=self.headers,
        )

        data = await self._handle_response(response, "get_meeting")
        return MeetingResponse(**data)

    async def get_meeting_participants(
        self,
        meeting_id: NonEmptyString,
        limit: int | None = None,
        joined_after: NonEmptyString | None = None,
        joined_before: NonEmptyString | None = None,
    ) -> MeetingParticipantsResponse:
        """
        Get historical participant data from a completed meeting (paginated).

        Reference: https://docs.daily.co/reference/rest-api/meetings/get-meeting-participants

        Args:
            meeting_id: Daily.co meeting/session ID
            limit: Maximum number of participant records to return
            joined_after: Return participants who joined after this participant_id
            joined_before: Return participants who joined before this participant_id

        Returns:
            List of participants with join times and duration

        Raises:
            httpx.HTTPStatusError: If API request fails (404 when no more participants)

        Note:
            For pagination, use joined_after with the last participant_id from previous response.
            Returns 404 when no more participants remain.
        """
        params = {}
        if limit is not None:
            params["limit"] = limit
        if joined_after is not None:
            params["joined_after"] = joined_after
        if joined_before is not None:
            params["joined_before"] = joined_before

        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/meetings/{meeting_id}/participants",
            headers=self.headers,
            params=params,
        )

        data = await self._handle_response(response, "get_meeting_participants")
        return MeetingParticipantsResponse(**data)

    # ============================================================================
    # RECORDINGS
    # ============================================================================

    async def get_recording(self, recording_id: NonEmptyString) -> RecordingResponse:
        """
        https://docs.daily.co/reference/rest-api/recordings/get-recording-information
        Get recording metadata and status.
        """
        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/recordings/{recording_id}",
            headers=self.headers,
        )

        data = await self._handle_response(response, "get_recording")
        return RecordingResponse(**data)

    async def list_recordings(
        self,
        room_name: NonEmptyString | None = None,
        starting_after: str | None = None,
        ending_before: str | None = None,
        limit: int = 100,
    ) -> list[RecordingResponse]:
        """
        List recordings with optional filters.

        Reference: https://docs.daily.co/reference/rest-api/recordings

        Args:
            room_name: Filter by room name
            starting_after: Pagination cursor - recording ID to start after
            ending_before: Pagination cursor - recording ID to end before
            limit: Max results per page (default 100, max 100)

        Note: starting_after/ending_before are pagination cursors (recording IDs),
        NOT time filters. API returns recordings in reverse chronological order.
        """
        client = await self._get_client()

        params = {"limit": limit}
        if room_name:
            params["room_name"] = room_name
        if starting_after:
            params["starting_after"] = starting_after
        if ending_before:
            params["ending_before"] = ending_before

        response = await client.get(
            f"{self.base_url}/recordings",
            headers=self.headers,
            params=params,
        )

        data = await self._handle_response(response, "list_recordings")

        if not isinstance(data, dict) or "data" not in data:
            logger.error(
                "Daily.co API returned unexpected format for list_recordings",
                data_type=type(data).__name__,
                data_keys=list(data.keys()) if isinstance(data, dict) else None,
                data_sample=str(data)[:500],
                room_name=room_name,
                operation="list_recordings",
            )
            raise httpx.HTTPStatusError(
                message=f"Unexpected response format from list_recordings: {type(data).__name__}",
                request=response.request,
                response=response,
            )

        return [RecordingResponse(**r) for r in data["data"]]

    async def start_recording(
        self,
        room_name: NonEmptyString,
        recording_type: RecordingType,
        instance_id: UUID,
    ) -> dict[str, Any]:
        """Start recording via REST API.

        Reference: https://docs.daily.co/reference/rest-api/rooms/recordings/start

        Args:
            room_name: Daily.co room name
            recording_type: Recording type
            instance_id: UUID for this recording session

        Returns:
            Recording start confirmation from Daily.co API

        Raises:
            DailyApiError: If API request fails
        """
        client = await self._get_client()
        response = await client.post(
            f"{self.base_url}/rooms/{room_name}/recordings/start",
            headers=self.headers,
            json={
                "type": recording_type,
                "instanceId": str(instance_id),
            },
        )
        return await self._handle_response(response, "start_recording")

    # ============================================================================
    # MEETING TOKENS
    # ============================================================================

    async def create_meeting_token(
        self, request: CreateMeetingTokenRequest
    ) -> MeetingTokenResponse:
        """
        Create a meeting token for participant authentication.

        Reference: https://docs.daily.co/reference/rest-api/meeting-tokens/create-meeting-token

        Args:
            request: Token properties including room name, user_id, permissions

        Returns:
            JWT meeting token

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.post(
            f"{self.base_url}/meeting-tokens",
            headers=self.headers,
            json=request.model_dump(exclude_none=True),
        )

        data = await self._handle_response(response, "create_meeting_token")
        return MeetingTokenResponse(**data)

    # ============================================================================
    # WEBHOOKS
    # ============================================================================

    async def list_webhooks(self) -> list[WebhookResponse]:
        """
        List all configured webhooks for this account.

        Reference: https://docs.daily.co/reference/rest-api/webhooks

        Returns:
            List of webhook configurations

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.get(
            f"{self.base_url}/webhooks",
            headers=self.headers,
        )

        data = await self._handle_response(response, "list_webhooks")

        # Daily.co returns array directly (not paginated)
        if isinstance(data, list):
            return [WebhookResponse(**wh) for wh in data]

        # Future-proof: handle potential pagination envelope
        if isinstance(data, dict) and "data" in data:
            return [WebhookResponse(**wh) for wh in data["data"]]

        logger.warning("Unexpected webhook list response format", data=data)
        return []

    async def create_webhook(self, request: CreateWebhookRequest) -> WebhookResponse:
        """
        Create a new webhook subscription.

        Reference: https://docs.daily.co/reference/rest-api/webhooks

        Args:
            request: Webhook configuration with URL, event types, and HMAC secret

        Returns:
            Created webhook with UUID and state

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.post(
            f"{self.base_url}/webhooks",
            headers=self.headers,
            json=request.model_dump(exclude_none=True),
        )

        data = await self._handle_response(response, "create_webhook")
        return WebhookResponse(**data)

    async def update_webhook(
        self, webhook_uuid: NonEmptyString, request: UpdateWebhookRequest
    ) -> WebhookResponse:
        """
        Update webhook configuration.

        Note: Daily.co may not support PATCH for all fields.
        Common pattern is delete + recreate.

        Reference: https://docs.daily.co/reference/rest-api/webhooks

        Args:
            webhook_uuid: Webhook UUID to update
            request: Updated webhook configuration

        Returns:
            Updated webhook configuration

        Raises:
            httpx.HTTPStatusError: If API request fails
        """
        client = await self._get_client()
        response = await client.patch(
            f"{self.base_url}/webhooks/{webhook_uuid}",
            headers=self.headers,
            json=request.model_dump(exclude_none=True),
        )

        data = await self._handle_response(response, "update_webhook")
        return WebhookResponse(**data)

    async def delete_webhook(self, webhook_uuid: NonEmptyString) -> None:
        """
        Delete a webhook.

        Reference: https://docs.daily.co/reference/rest-api/webhooks

        Args:
            webhook_uuid: Webhook UUID to delete

        Raises:
            httpx.HTTPStatusError: If webhook not found or deletion fails
        """
        client = await self._get_client()
        response = await client.delete(
            f"{self.base_url}/webhooks/{webhook_uuid}",
            headers=self.headers,
        )

        await self._handle_response(response, "delete_webhook")

    # ============================================================================
    # HELPER METHODS
    # ============================================================================

    async def find_webhook_by_url(self, url: NonEmptyString) -> WebhookResponse | None:
        """
        Find a webhook by its URL.

        Args:
            url: Webhook endpoint URL to search for

        Returns:
            Webhook if found, None otherwise
        """
        webhooks = await self.list_webhooks()
        for webhook in webhooks:
            if webhook.url == url:
                return webhook
        return None

    async def find_webhooks_by_pattern(
        self, pattern: NonEmptyString
    ) -> list[WebhookResponse]:
        """
        Find webhooks matching a URL pattern (e.g., 'ngrok').

        Args:
            pattern: String to match in webhook URLs

        Returns:
            List of matching webhooks
        """
        webhooks = await self.list_webhooks()
        return [wh for wh in webhooks if pattern in wh.url]