package httpx

import (
	"log/slog"
	"net/http"
	"os"
	"strings"
	"time"

	"github.com/go-chi/chi/v5/middleware"
)

// NewLogger создаёт JSON-логгер с заданным уровнем (debug, info, warn, error).
func NewLogger(level string) *slog.Logger {
	var lvl slog.Level
	if err := lvl.UnmarshalText([]byte(strings.ToUpper(level))); err != nil {
		lvl = slog.LevelInfo
	}
	return slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: lvl}))
}

// AccessLog пишет строку лога на каждый запрос, кроме проб здоровья.
func AccessLog(log *slog.Logger) func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			if r.URL.Path == "/healthz" || r.URL.Path == "/readyz" {
				next.ServeHTTP(w, r)
				return
			}
			ww := middleware.NewWrapResponseWriter(w, r.ProtoMajor)
			start := time.Now()
			next.ServeHTTP(ww, r)
			log.InfoContext(r.Context(), "http",
				"method", r.Method,
				"path", r.URL.Path,
				"status", ww.Status(),
				"bytes", ww.BytesWritten(),
				"duration_ms", time.Since(start).Milliseconds(),
				"request_id", middleware.GetReqID(r.Context()),
			)
		})
	}
}