package main

import (
	"fmt"
	"time"
)

var DateFmtYYYYMM = "2006-01"
var DateFmtYYYYMMDD = "2006-01-02"
var DateFmtYYYYMMDDHHmmss = "2006-01-02 15:04:05"

func main() {
	//standard := time.Now().Add(8 * time.Hour)
	//end := fmt.Sprintf("< %s 16:00:00", standard.Format(DateFmtYYYYMMDD))
	//start := fmt.Sprintf("> %s 15:59:59", standard.AddDate(0, 0, -30).Format(DateFmtYYYYMMDD))
	//
	//fmt.Println(start)
	//fmt.Println(end)
	//a := standard.Format(DateFmtYYYYMM)
	//d, err := time.Parse(DateFmtYYYYMM, a)
	//if err != nil {
	//	fmt.Println(err.Error())
	//}
	//fmt.Println(a)
	//b := "2022-13"
	//c, err := time.Parse(DateFmtYYYYMM, b)
	//if err != nil {
	//	fmt.Println(err.Error())
	//}
	//fmt.Println(c.Before(d))
	fmt.Println(time.Now().UnixMilli() % 1000)
	//now := time.Now().Add(8 * time.Hour)
	now := time.Now()
	year := now.Format("2006") //获取年
	month := now.Format("01")  //获取月
	day := now.Format("02")    //获取日
	hour := now.Format("15")
	min := now.Format("04")
	second := now.Format("05")
	//milli := now.UnixMilli() % 1000
	s := fmt.Sprintf("%s%s%s%s%s%s%03d", year, month, day, hour, min, second, 200)
	fmt.Printf(s)
	t := time.Now().AddDate(0, -1, 0).Format(DateFmtYYYYMM)
	fmt.Println()
	fmt.Println(t)

	//nowMonth, err := time.Parse(DateFmtYYYYMM, time.Now().Add(8*time.Hour).Format(DateFmtYYYYMM))
	//fmt.Println(nowMonth)
	//y := "2022-12-23 17:35:76"
	//fmt.Println(y[:7])
	//lastMonth := time.Now().AddDate(0, -1, 0).Add(8 * time.Hour)
	//lastMonthStartDay := lastMonth.AddDate(0, 0, -lastMonth.Day())
	//lastMonthEndDay := lastMonth.AddDate(0, 1, -1)
	//fmt.Println(lastMonthStartDay, lastMonthEndDay)

	now = time.Now()
	lastMonth := now.AddDate(0, -4, 0)
	fmt.Println(lastMonth)
	startDay := lastMonth.AddDate(0, 1, -now.Day()).Format(DateFmtYYYYMMDD)
	//fmt.Println(nowMonth)
	fmt.Println(startDay) //10 -31
	endDay := lastMonth.AddDate(0, 0, -lastMonth.Day()).Format(DateFmtYYYYMMDD)
	//fmt.Println(nowMonth)
	fmt.Println(endDay) //9 -30

	utcZone := time.FixedZone("GMT", 0)
	time.Local = utcZone
	now2 := time.Now()
	expires := now2.Add(3 * time.Minute).Format("2022-10-12T00:00:00.000Z")

	fmt.Println(expires)
}