package middleware

import (
	"fmt"
	"net/http"

	"github.com/fatih/color"
	"github.com/gomods/athens/pkg/log"
	logrus "github.com/sirupsen/logrus"
)

type responseWriter struct {
	http.ResponseWriter
	statusCode int
}

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

// RequestLogger logs request params to standard output
// it should only be used during dev.
func RequestLogger(h http.Handler) http.Handler {
	f := func(w http.ResponseWriter, r *http.Request) {
		rw := &responseWriter{w, 0}
		h.ServeHTTP(rw, r)
		log.EntryFromContext(r.Context()).WithFields(logrus.Fields{
			"http-status": fmtResponseCode(rw.statusCode),
		}).Infof("incoming request")
	}
	return http.HandlerFunc(f)
}

func fmtResponseCode(statusCode int) string {
	if statusCode == 0 {
		statusCode = 200
	}
	status := fmt.Sprint(statusCode)
	switch {
	case statusCode < http.StatusBadRequest:
		status = color.GreenString("%v", status)
	case statusCode >= http.StatusBadRequest && statusCode < http.StatusInternalServerError:
		status = color.HiYellowString("%v", status)
	default:
		status = color.HiRedString("%v", status)
	}
	return status
}