from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from typing import List, Optional
from pydantic import BaseModel
from ..db.database import get_db
from ..models.lofi import LofiChannel
from ..schemas.lofi import LofiChannelResponse


class AddLofiChannelRequest(BaseModel):
    name: str
    stream_url: str
    image_path: Optional[str] = ""
    description: Optional[str] = ""
    source_platform: Optional[str] = "youtube"

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

DEFAULT_CHANNELS = [
    {"id": "lofi-girl", "name": "Lofi Girl - beats to relax/study to", "stream_url": "https://www.youtube.com/live/jfKfPfyJRdk", "image_path": "/lofi/rain.jpg", "description": "The original lofi hip hop radio", "source_platform": "youtube", "is_active": True},
    {"id": "chillhop", "name": "Chillhop Radio", "stream_url": "https://www.youtube.com/live/5yx6BWtMraY", "image_path": "/lofi/coffee.jpg", "description": "Jazz hop and lofi beats", "source_platform": "youtube", "is_active": True},
    {"id": "lofi-hip-hop", "name": "Lofi Hip Hop", "stream_url": "https://www.youtube.com/live/lTRiuFIWV5U", "image_path": "/lofi/night.jpg", "description": "Chill lofi hip hop beats", "source_platform": "youtube", "is_active": True},
]


@router.get("/channels", response_model=List[LofiChannelResponse])
def list_channels(db: Session = Depends(get_db)):
    _seed_channels(db)
    channels = db.query(LofiChannel).filter(LofiChannel.is_active == True).all()
    return [LofiChannelResponse.model_validate(c) for c in channels]


@router.post("/add")
def add_channel(data: AddLofiChannelRequest, db: Session = Depends(get_db)):
    import uuid
    channel_id = str(uuid.uuid4())[:8]

    existing = db.query(LofiChannel).filter(LofiChannel.name == data.name).first()
    if existing:
        raise HTTPException(status_code=400, detail="Channel already exists")

    channel = LofiChannel(
        id=channel_id,
        name=data.name,
        stream_url=data.stream_url,
        image_path=data.image_path or "",
        description=data.description or "",
        source_platform=data.source_platform or "youtube",
    )
    db.add(channel)
    db.commit()
    db.refresh(channel)
    return LofiChannelResponse.model_validate(channel)


def _seed_channels(db: Session):
    for ch in DEFAULT_CHANNELS:
        existing = db.query(LofiChannel).filter(LofiChannel.id == ch["id"]).first()
        if not existing:
            channel = LofiChannel(**ch)
            db.add(channel)
    db.commit()