"""music-render FastAPI entry — health + lifespan + sync forward endpoints.

NAS music-lab이 sync helpers(lyrics, credits, timestamped, style-boost)를
httpx로 forward해서 이 endpoint들을 호출.
"""
from __future__ import annotations

import asyncio
import logging
from contextlib import asynccontextmanager

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel

import worker
from providers.sync_ops import (
    generate_lyrics, get_credits,
    get_timestamped_lyrics, generate_style_boost,
)

logging.basicConfig(level=logging.INFO, format="%(asctime)s %(name)s %(levelname)s %(message)s")
logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    worker_task = asyncio.create_task(worker.worker_loop())
    logger.info("music-render lifespan 시작")
    try:
        yield
    finally:
        worker_task.cancel()
        try:
            await worker_task
        except asyncio.CancelledError:
            pass
        logger.info("music-render lifespan 종료")


app = FastAPI(lifespan=lifespan)


@app.get("/health")
def health():
    return {"ok": True, "service": "music-render"}


# ── Sync forward endpoints ──────────────────────────────────────────────
# NAS music-lab의 /api/music/lyrics 등 sync helpers가 이 endpoint들로 forward.

class LyricsRequest(BaseModel):
    prompt: str


@app.post("/api/music-render/sync/lyrics")
def sync_lyrics(req: LyricsRequest):
    result = generate_lyrics(req.prompt)
    if not result:
        raise HTTPException(502, "가사 생성 실패")
    return result


@app.get("/api/music-render/sync/credits")
def sync_credits():
    result = get_credits()
    if result is None:
        raise HTTPException(502, "크레딧 조회 실패")
    return result


@app.get("/api/music-render/sync/timestamped-lyrics")
def sync_timestamped_lyrics(task_id: str, suno_id: str):
    result = get_timestamped_lyrics(task_id, suno_id)
    if not result:
        raise HTTPException(502, "타임스탬프 가사 조회 실패")
    return result


class StyleBoostRequest(BaseModel):
    content: str


@app.post("/api/music-render/sync/style-boost")
def sync_style_boost(req: StyleBoostRequest):
    result = generate_style_boost(req.content)
    if not result:
        raise HTTPException(502, "스타일 부스트 생성 실패")
    return result