"""FastAPI application factory."""
from fastapi import FastAPI

from app.api.routes import api_router
from app.core.cache import init_cache, shutdown_cache
from app.core.config import settings
from app.core.middleware.cache_monitor import CacheAvailabilityMiddleware


def create_app() -> FastAPI:
    """Build FastAPI application instance."""
    application = FastAPI(title=settings.project_name, version=settings.version)
    application.include_router(api_router)
    application.add_middleware(CacheAvailabilityMiddleware)

    @application.on_event("startup")
    async def _startup() -> None:
        await init_cache()

    @application.on_event("shutdown")
    async def _shutdown() -> None:
        await shutdown_cache()

    return application


app = create_app()