package main

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

// Logger interface
type Logger interface {
	Println(v ...interface{})
	Printf(format string, v ...interface{})
}

// LoggerHandler interface
type LoggerHandler interface {
	Logger
	ServeHTTP(http.ResponseWriter, *http.Request, http.HandlerFunc)
}

// NewLogger returns a logger interface
func NewLogger() LoggerHandler {
	return &logger{log.New(os.Stdout, appLabel, log.Ldate|log.Lmicroseconds)}
}

type logger struct {
	Logger
}

func (l *logger) ServeHTTP(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
	start := time.Now()
	next(rw, r)
	l.Printf("Completed %s to %s in %v", r.Method, r.URL.Path, time.Since(start))
}