package main

import (
	"log"
	"os"
	"sync"
	"time"
)

var (
	accessLogger  *log.Logger
	accessLogDate string
	accessLogMu   sync.Mutex
)

func logAccess(format string, v ...interface{}) {
	accessLogMu.Lock()
	defer accessLogMu.Unlock()

	today := time.Now().Format("2006-01-02")
	if accessLogDate != today {
		if accessLog != nil {
			accessLog.Close()
		}
		f, err := os.OpenFile("/tank/inou/logs/access-"+today+".log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
		if err != nil {
			return
		}
		accessLog = f
		accessLogger = log.New(f, "", 0)
		accessLogDate = today
	}
	if accessLogger != nil {
		accessLogger.Printf(format, v...)
	}
}