"""Request logging for the API."""

from __future__ import annotations

import logging
import time
import uuid

logger = logging.getLogger("IoTAnalyzer.request")


class RequestLogMiddleware:
    """Log one line per API request with duration, status, user and a request id."""

    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        started = time.time()
        request_id = request.headers.get("X-Request-ID") or uuid.uuid4().hex[:12]
        request.request_id = request_id
        try:
            response = self.get_response(request)
        except Exception:
            logger.exception("%s %s failed after %.0f ms [rid=%s]", request.method,
                             request.get_full_path(), (time.time() - started) * 1000, request_id)
            raise
        response["X-Request-ID"] = request_id
        if request.path.startswith("/api/") and request.path != "/api/health":
            user = getattr(getattr(request, "user", None), "username", None) or "-"
            level = logging.WARNING if response.status_code >= 500 else \
                logging.INFO if response.status_code >= 400 else logging.DEBUG
            logger.log(level, "%s %s -> %s in %.0f ms user=%s [rid=%s]", request.method,
                       request.get_full_path(), response.status_code,
                       (time.time() - started) * 1000, user, request_id)
        return response