package main

import (
	"os"
	"errors"
	"math/rand"
	"time"
	"log"
	"strconv"
)

func init() {
	rand.Seed(time.Now().Unix())
	file := "/www/logs/test.log";
	logFile, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0766)
	if err != nil {
		panic(err)
	}
	log.SetOutput(logFile) // 将文件设置为log输出的文件
	log.SetPrefix("[elk-test]")
	log.SetFlags(log.LstdFlags | log.Lshortfile | log.LUTC)
}


func main() {
	

	for {
		go func() {
			strs := []string{"浏览页面", "评论商品", "加入收藏", "加入购物车", "提交订单", "使用优惠券", "领取优惠券", "搜索", "查看订单"}

			a, _ := Random(strs, 1)


			now := time.Now()
			date := now.Format("2006-01-02 15:04:05")

			userId := rand.Intn(10000)

			result := "brady|" +strconv.Itoa(userId+1) + "|" + a + "|" + date;

			log.Println(result) // log 还是可以作为输出的前缀
		}()

		time.Sleep(1*time.Second)
	}


}

func Random(strings []string, length int) (string, error) {
	if len(strings) <= 0 {
		return "", errors.New("the length of the parameter strings should not be less than 0")
	}

	if length <= 0 || len(strings) <= length {
		return "", errors.New("the size of the parameter length illegal")
	}

	for i := len(strings) - 1; i > 0; i-- {
		num := rand.Intn(i + 1)
		strings[i], strings[num] = strings[num], strings[i]
	}

	str := ""
	for i := 0; i < length; i++ {
		str += strings[i]
	}
	return str, nil
}