from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.core.database import SessionLocal
from app.services.seed import seed_initial_data
from app.services.scheduler.watchdog import start_watchdog, stop_watchdog
from app.api.v1.router import api_router


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Startup
    db = SessionLocal()
    try:
        seed_initial_data(db)
    finally:
        db.close()
    start_watchdog()
    yield
    # Shutdown
    stop_watchdog()


app = FastAPI(
    title="Virtual MIS API",
    version="2.0.0",
    description="SaaS 虛擬 MIS 平台管理後端",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["http://localhost:10280", "http://localhost:10290"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(api_router, prefix="/api/v1")


@app.get("/health")
def health():
    return {"status": "ok", "service": "vmis-backend"}