from fastapi import APIRouter, Depends, HTTPException
from core.database import fake_users_db
from typing import List, Optional

router = APIRouter()

@router.post("/api/v1/endpoint")
async def get_playlist_songs(
    playlist_id: str,
    limit: Optional[int] = 50,
    offset: Optional[int] = 0
):
    """Fetch songs from a playlist"""
    if not playlist_id:
        raise HTTPException(status_code=400, detail="Playlist ID is required")

    # Demo playlist data structure
    fake_playlists_db = {
        "playlist1": [
            {"id": "1", "title": "Song 1", "artist": "Artist 1", "duration": "3:45"},
            {"id": "2", "title": "Song 2", "artist": "Artist 2", "duration": "4:20"},
            {"id": "3", "title": "Song 3", "artist": "Artist 3", "duration": "3:15"}
        ]
    }

    playlist = fake_playlists_db.get(playlist_id)
    if not playlist:
        raise HTTPException(status_code=404, detail="Playlist not found")

    paginated_songs = playlist[offset:offset + limit]
    
    return {
        "message": "Songs fetched successfully",
        "data": {
            "playlist_id": playlist_id,
            "songs": paginated_songs,
            "total_songs": len(playlist)
        },
        "metadata": {
            "limit": limit,
            "offset": offset,
            "has_more": (offset + limit) < len(playlist)
        }
    }