"""FastAPI application factory."""

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from starlette.middleware.gzip import GZipMiddleware

from app.api.router import api_router
from app.core.config import Settings, get_settings
from app.core.exceptions import AppException, app_exception_handler
from app.core.logging import configure_logging


def create_app(settings: Settings | None = None) -> FastAPI:
    resolved_settings = settings or get_settings()
    configure_logging(resolved_settings.log_level)

    application = FastAPI(
        title=resolved_settings.app_name,
        version=resolved_settings.app_version,
        debug=resolved_settings.debug,
    )
    application.add_middleware(
        CORSMiddleware,
        allow_origins=list(resolved_settings.cors_allow_origins),
        allow_credentials=True,
        allow_methods=["GET", "POST", "PATCH", "DELETE", "OPTIONS"],
        allow_headers=["Authorization", "Content-Type", "Accept"],
    )
    application.add_middleware(GZipMiddleware, minimum_size=1000, compresslevel=5)
    application.add_exception_handler(AppException, app_exception_handler)
    application.include_router(api_router)
    return application


app = create_app()