package middleware

import (
	"crypto/rand"
	"encoding/hex"
	"log/slog"
	"net/http"
	"time"

	applog "github.com/noderunners/nip05api/internal/log"
)

type statusRecorder struct {
	http.ResponseWriter
	status int
}

func (s *statusRecorder) WriteHeader(code int) {
	s.status = code
	s.ResponseWriter.WriteHeader(code)
}

func newRequestID() string {
	b := make([]byte, 8)
	_, _ = rand.Read(b)
	return hex.EncodeToString(b)
}

func Logging(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		id := r.Header.Get("X-Request-ID")
		if id == "" {
			id = newRequestID()
		}
		w.Header().Set("X-Request-ID", id)
		ctx := applog.WithRequestID(r.Context(), id)
		rec := &statusRecorder{ResponseWriter: w, status: 200}
		start := time.Now()
		next.ServeHTTP(rec, r.WithContext(ctx))
		slog.Info("http",
			"request_id", id,
			"method", r.Method,
			"path", r.URL.Path,
			"status", rec.status,
			"duration_ms", time.Since(start).Milliseconds(),
			"remote", r.RemoteAddr,
		)
	})
}