from fastapi import FastAPI
from starlette.middleware.sessions import SessionMiddleware

from app.config import Settings, get_settings
from app.db.session import create_db_engine, create_session_factory, initialize_schema
from app.web.routes import router as web_router


def create_app(settings: Settings | None = None) -> FastAPI:
    resolved = settings or get_settings()
    resolved.data_dir.mkdir(parents=True, exist_ok=True)
    resolved.tokens_dir.mkdir(parents=True, exist_ok=True)
    resolved.activities_dir.mkdir(parents=True, exist_ok=True)

    app = FastAPI(title="MyWhoosh Garmin Sync")
    app.state.settings = resolved

    engine = create_db_engine(resolved.database_url)
    initialize_schema(engine)
    app.state.db_engine = engine
    app.state.session_factory = create_session_factory(engine)

    app.add_middleware(
        SessionMiddleware,
        secret_key=resolved.secret_key,
        same_site="lax",
        https_only=False,
    )
    app.include_router(web_router)

    @app.get("/healthz")
    def healthz() -> dict[str, str]:
        return {"status": "ok"}

    return app


app = create_app()