from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
import os
from tortoise import Tortoise

from app.core.exceptions import SettingNotFound
from app.core.init_app import (
    init_data,
    make_middlewares,
    register_exceptions,
    register_routers,
)
from app.core.clickhouse import clickhouse_manager
from app.core.scheduler import start_scheduler, shutdown_scheduler

try:
    from app.settings.config import settings
except ImportError:
    raise SettingNotFound("Can not import settings")


@asynccontextmanager
async def lifespan(app: FastAPI):
    await Tortoise.init(config=settings.TORTOISE_ORM)
    await Tortoise.generate_schemas()
    await init_data()
    start_scheduler()
    yield
    # 清理所有数据库连接
    await Tortoise.close_connections()
    await clickhouse_manager.close()
    shutdown_scheduler()


def create_app() -> FastAPI:
    app = FastAPI(
        title=settings.APP_TITLE,
        description=settings.APP_DESCRIPTION,
        version=settings.VERSION,
        openapi_url="/openapi.json",
        middleware=make_middlewares(),
        lifespan=lifespan,
    )
    register_exceptions(app)
    register_routers(app, prefix="/api")
    
    # Mount static files
    static_dir = os.path.join(settings.BASE_DIR, "static")
    if os.path.exists(static_dir):
        app.mount("/static", StaticFiles(directory=static_dir), name="static")
        
    return app


app = create_app()