media-player-server/media_server/routes/media.py

"""Media control API endpoints."""

import logging

from fastapi import APIRouter, Depends, HTTPException, Query, WebSocket, WebSocketDisconnect
from fastapi import status
from fastapi.responses import Response

from ..auth import verify_token, verify_token_or_query
from ..config import settings
from ..models import MediaStatus, VolumeRequest, SeekRequest
from ..services import get_media_controller, get_current_album_art
from ..services.websocket_manager import ws_manager

logger = logging.getLogger(__name__)

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


@router.get("/status", response_model=MediaStatus)
async def get_media_status(_: str = Depends(verify_token)) -> MediaStatus:
    """Get current media playback status.

    Returns:
        Current playback state, media info, volume, etc.
    """
    controller = get_media_controller()
    return await controller.get_status()


@router.post("/play")
async def play(_: str = Depends(verify_token)) -> dict:
    """Resume or start playback.

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.play()
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to start playback - no active media session",
        )
    return {"success": True}


@router.post("/pause")
async def pause(_: str = Depends(verify_token)) -> dict:
    """Pause playback.

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.pause()
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to pause - no active media session",
        )
    return {"success": True}


@router.post("/stop")
async def stop(_: str = Depends(verify_token)) -> dict:
    """Stop playback.

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.stop()
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to stop - no active media session",
        )
    return {"success": True}


@router.post("/next")
async def next_track(_: str = Depends(verify_token)) -> dict:
    """Skip to next track.

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.next_track()
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to skip - no active media session",
        )
    return {"success": True}


@router.post("/previous")
async def previous_track(_: str = Depends(verify_token)) -> dict:
    """Go to previous track.

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.previous_track()
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to go back - no active media session",
        )
    return {"success": True}


@router.post("/volume")
async def set_volume(
    request: VolumeRequest, _: str = Depends(verify_token)
) -> dict:
    """Set the system volume.

    Args:
        request: Volume level (0-100)

    Returns:
        Success status with new volume level
    """
    controller = get_media_controller()
    success = await controller.set_volume(request.volume)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to set volume",
        )
    return {"success": True, "volume": request.volume}


@router.post("/mute")
async def toggle_mute(_: str = Depends(verify_token)) -> dict:
    """Toggle mute state.

    Returns:
        Success status with new mute state
    """
    controller = get_media_controller()
    muted = await controller.toggle_mute()
    return {"success": True, "muted": muted}


@router.post("/seek")
async def seek(request: SeekRequest, _: str = Depends(verify_token)) -> dict:
    """Seek to a position in the current track.

    Args:
        request: Position in seconds

    Returns:
        Success status
    """
    controller = get_media_controller()
    success = await controller.seek(request.position)
    if not success:
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail="Failed to seek - no active media session or seek not supported",
        )
    return {"success": True, "position": request.position}


@router.get("/artwork")
async def get_artwork(_: str = Depends(verify_token_or_query)) -> Response:
    """Get the current album artwork.

    Returns:
        The album art image as PNG/JPEG
    """
    art_bytes = get_current_album_art()
    if art_bytes is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="No album artwork available",
        )

    # Try to detect image type from magic bytes
    content_type = "image/png"  # Default
    if art_bytes[:3] == b"\xff\xd8\xff":
        content_type = "image/jpeg"
    elif art_bytes[:8] == b"\x89PNG\r\n\x1a\n":
        content_type = "image/png"
    elif art_bytes[:4] == b"RIFF" and art_bytes[8:12] == b"WEBP":
        content_type = "image/webp"

    return Response(content=art_bytes, media_type=content_type)


@router.websocket("/ws")
async def websocket_endpoint(
    websocket: WebSocket,
    token: str = Query(..., description="API authentication token"),
) -> None:
    """WebSocket endpoint for real-time media status updates.

    Authentication is done via query parameter since WebSocket
    doesn't support custom headers in the browser.

    Messages sent to client:
    - {"type": "status", "data": {...}} - Initial status on connect
    - {"type": "status_update", "data": {...}} - Status changes
    - {"type": "error", "message": "..."} - Error messages

    Client can send:
    - {"type": "ping"} - Keepalive, server responds with {"type": "pong"}
    - {"type": "get_status"} - Request current status
    """
    # Verify token
    if token != settings.api_token:
        await websocket.close(code=4001, reason="Invalid authentication token")
        return

    await ws_manager.connect(websocket)

    try:
        while True:
            # Wait for messages from client (for keepalive/ping)
            data = await websocket.receive_json()

            if data.get("type") == "ping":
                await websocket.send_json({"type": "pong"})
            elif data.get("type") == "get_status":
                # Allow manual status request
                controller = get_media_controller()
                status_data = await controller.get_status()
                await websocket.send_json({
                    "type": "status",
                    "data": status_data.model_dump(),
                })

    except WebSocketDisconnect:
        await ws_manager.disconnect(websocket)
    except Exception as e:
        logger.error("WebSocket error: %s", e)
        await ws_manager.disconnect(websocket)