"""FastAPI application entrypoint."""

from fastapi import FastAPI

from app.config import Settings, get_settings
from app.controllers.v1.delivery import router as delivery_router
from app.runtime.logging import configure_logging
from app.runtime.metrics import configure_metrics
from app.runtime.tracing import configure_tracing


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

    application = FastAPI(title="G2S Aggregator", version="0.1.0")
    application.state.settings = resolved_settings

    application.include_router(delivery_router, prefix=resolved_settings.controller.api_prefix)
    configure_tracing(application, resolved_settings.observability)
    return application


app = create_app()