"""Channel API routes."""

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from core import youtube

router = APIRouter()


class ChannelCreate(BaseModel):
    channel_id: str
    channel_name: str


@router.get("")
def list_channels():
    return youtube.get_active_channels()


@router.post("", status_code=201)
def create_channel(body: ChannelCreate):
    try:
        row_id = youtube.add_channel(body.channel_id, body.channel_name)
        return {"id": row_id, "channel_id": body.channel_id}
    except Exception as e:
        if "UQ_CHANNELS_CID" in str(e).upper():
            raise HTTPException(409, "Channel already exists")
        raise


@router.post("/{channel_id}/scan")
def scan_channel(channel_id: str):
    """Trigger a scan for new videos from this channel."""
    channels = youtube.get_active_channels()
    ch = next((c for c in channels if c["channel_id"] == channel_id), None)
    if not ch:
        raise HTTPException(404, "Channel not found")

    videos = youtube.fetch_channel_videos(channel_id, max_results=50)
    new_count = 0
    for v in videos:
        row_id = youtube.save_video(ch["id"], v)
        if row_id:
            new_count += 1
    return {"total_fetched": len(videos), "new_videos": new_count}