import logging
import time
from uuid import uuid4

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from pythonjsonlogger import jsonlogger

from app.api.routes import router
from app.config import get_settings
from app.infrastructure.database import init_db


def configure_logging() -> None:
    handler = logging.StreamHandler()
    handler.setFormatter(jsonlogger.JsonFormatter("%(asctime)s %(levelname)s %(name)s %(message)s %(request_id)s %(latency_ms)s"))
    logging.basicConfig(level=logging.INFO, handlers=[handler], force=True)


def create_app() -> FastAPI:
    configure_logging()
    settings = get_settings()
    app = FastAPI(title=settings.app_name, version="0.1.0")
    app.add_middleware(
        CORSMiddleware,
        allow_origins=settings.cors_origins,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    app.include_router(router)

    @app.on_event("startup")
    def startup() -> None:
        init_db()

    @app.middleware("http")
    async def request_logging(request: Request, call_next):
        request_id = request.headers.get("x-request-id", str(uuid4()))
        start = time.perf_counter()
        response = await call_next(request)
        latency_ms = round((time.perf_counter() - start) * 1000, 2)
        logging.getLogger("app.request").info(
            "request complete",
            extra={"request_id": request_id, "latency_ms": latency_ms, "path": request.url.path, "status_code": response.status_code},
        )
        response.headers["x-request-id"] = request_id
        return response

    return app


app = create_app()