package middleware

import (
	"log/slog"
	"net/http"
	"time"
)

// responseWriter 是用于捕获状态码的响应写入器
type responseWriter struct {
	http.ResponseWriter
	statusCode int
}

func (rw *responseWriter) WriteHeader(code int) {
	rw.statusCode = code
	rw.ResponseWriter.WriteHeader(code)
}

// Logging 中间件记录请求日志
func Logging(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		start := time.Now()
		rw := &responseWriter{ResponseWriter: w, statusCode: http.StatusOK}

		next.ServeHTTP(rw, r)

		duration := time.Since(start)
		slog.Info("http_request",
			"method", r.Method,
			"path", r.URL.Path,
			"status", rw.statusCode,
			"duration_ms", float64(duration.Microseconds())/1000,
			"remote_addr", r.RemoteAddr,
		)
	})
}