"""NanoClaude — 비동기 job 기반 AI Gateway (Phase 3: Synology Chat 연동)."""

from __future__ import annotations

import logging
from contextlib import asynccontextmanager

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse

from config import settings
from db.database import init_db
from routers import chat, synology
from services.backend_registry import backend_registry
from services import job_queue as jq_module

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


@asynccontextmanager
async def lifespan(app: FastAPI):
    await init_db()
    backend_registry.init_from_settings(settings)
    backend_registry.start_health_loop(settings.health_check_interval)
    jq_module.init_queue(settings.max_concurrent_jobs)
    yield
    backend_registry.stop_health_loop()


app = FastAPI(
    title="NanoClaude",
    version="0.2.0",
    description="비동기 job 기반 AI Gateway — Phase 2 (EXAONE → Gemma 파이프라인)",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.middleware("http")
async def check_api_key(request: Request, call_next):
    """Optional API key check. 설정이 비어있으면 통과."""
    if settings.api_key:
        auth = request.headers.get("Authorization", "")
        if request.url.path not in ("/", "/health") and auth != f"Bearer {settings.api_key}":
            return JSONResponse(status_code=401, content={"detail": "Invalid API key"})
    return await call_next(request)


app.include_router(chat.router)
app.include_router(synology.router)


@app.get("/")
async def root():
    return {"service": "NanoClaude", "version": "0.2.0", "phase": 2}


@app.get("/health")
async def health():
    return {
        "status": "ok",
        "backends": backend_registry.health_summary(),
        "queue": jq_module.job_queue.stats if jq_module.job_queue else {},
    }