from fastapi import FastAPI, Header, HTTPException
from pydantic import BaseModel

from app.config import settings
from app.summarizer import summarize
from app.transcript import SkipVideo, extract_video_id, fetch_transcript

app = FastAPI(title="News Summary Bot")


class SummarizeRequest(BaseModel):
    video_url: str
    title: str = ""
    channel_name: str = ""


@app.post("/summarize")
async def summarize_video(
    req: SummarizeRequest,
    x_api_secret: str = Header(default=""),
):
    if settings.api_secret and x_api_secret != settings.api_secret:
        raise HTTPException(status_code=401, detail="Unauthorized")

    title = req.title or "제목 없음"

    channel_name = req.channel_name or ""
    base = {"video_url": req.video_url, "title": title, "channel_name": channel_name}

    try:
        video_id = extract_video_id(req.video_url)
        transcript = fetch_transcript(video_id)
        summary = summarize(transcript, title)
    except SkipVideo as e:
        return {**base, "status": "skipped", "reason": str(e)}
    except Exception as e:
        return {
            **base,
            "status": "error",
            "error_type": type(e).__name__,
            "error_message": str(e),
        }

    return {**base, "status": "ok", **summary}


@app.get("/health")
async def health():
    return {"status": "ok"}