from contextlib import asynccontextmanager
from collections.abc import AsyncIterator
import logging

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from sqlalchemy.exc import SQLAlchemyError

from app.api import alerts, assets, auth, health, monitors, notifications
from app.core.config import settings
from app.db.session import SessionLocal
from app.services.bootstrap import ensure_initial_admin

logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(_: FastAPI) -> AsyncIterator[None]:
    try:
        with SessionLocal() as db:
            ensure_initial_admin(db)
    except SQLAlchemyError as exc:
        logger.warning("Initial admin bootstrap skipped because the database is unavailable: %s", exc)
    yield


app = FastAPI(
    title="OrbitalWard API",
    version="0.1.0",
    description="Self-hosted infrastructure monitoring API",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=[str(settings.frontend_url)],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(health.router)
app.include_router(auth.router)
app.include_router(assets.router)
app.include_router(monitors.router)
app.include_router(alerts.router)
app.include_router(notifications.router)