import asyncio
import logging
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from sqlalchemy import select
from app.api.router import api_router
from app.core.config import get_settings
from app.core.db import SessionLocal
from app.core.logging import configure_logging
from app.core.security import hash_password
from app.models.models import User
from app.services.collector import collector_loop

settings = get_settings()
configure_logging(settings.log_level)
logger = logging.getLogger(__name__)

collector_task: asyncio.Task | None = None
collector_stop_event = asyncio.Event()


async def ensure_admin_user() -> None:
    async with SessionLocal() as db:
        admin = await db.scalar(select(User).where(User.email == settings.init_admin_email))
        if admin:
            return
        user = User(
            email=settings.init_admin_email,
            password_hash=hash_password(settings.init_admin_password),
            role="admin",
        )
        db.add(user)
        await db.commit()
        logger.info("created initial admin user")


@asynccontextmanager
async def lifespan(_: FastAPI):
    global collector_task
    await ensure_admin_user()
    collector_task = asyncio.create_task(collector_loop(collector_stop_event))
    try:
        yield
    finally:
        collector_stop_event.set()
        if collector_task:
            await collector_task


app = FastAPI(title=settings.app_name, lifespan=lifespan)
app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins_list,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)
app.include_router(api_router, prefix=settings.api_v1_prefix)