/*
 * @Name:
 * @Descripttion:
 * @Warning:
 * @version:
 * @Author: moo
 * @Date: 2021-01-06 14:22:20
 * @LastEditors: moo
 * @LastEditTime: 2021-05-28 15:16:07
 */
package utils

import (
	"time"
)

const (
	TIME_LAYOUT      string = "2006-01-02 15:04:05"
	TIME_DATE_LAYOUT string = "2006-01-02"
)

func CurrLocation() *time.Location {
	now := time.Now()
	location := now.Location()
	return location
}

// 计算日期相差多少天
// 返回值day>0, t1晚于t2; day<0, t1早于t2
func GapDays(t1, t2 time.Time) int {
	var i int
	d := t2.Sub(t1)

	i = int(d.Hours() / 24)

	return i
}

func GapMonth(t1, t2 time.Time) (month int) {
	y1 := t1.Year()
	y2 := t2.Year()
	m1 := int(t1.Month())
	m2 := int(t2.Month())
	d1 := t1.Day()
	d2 := t2.Day()

	yearInterval := y1 - y2
	// 如果 d1的 月-日 小于 d2的 月-日 那么 yearInterval-- 这样就得到了相差的年数
	if m1 < m2 || m1 == m2 && d1 < d2 {
		yearInterval--
	}
	// 获取月数差值
	monthInterval := (m1 + 12) - m2
	if d1 < d2 {
		monthInterval--
	}
	monthInterval %= 12
	month = yearInterval*12 + monthInterval
	return
}

/* 获取两个时间相差多少小时 */
func HourDiffer(start_time, end_time time.Time) int64 {
	var hour int64
	diff := end_time.Unix() - start_time.Unix()
	hour = diff / 3600
	return hour
}

/* 获取两个时间相差多少分钟 */
func MinuteDiffer(start_time, end_time time.Time) int64 {
	var m int64
	diff := end_time.Unix() - start_time.Unix()
	m = diff / 60
	return m
}

//获取传入的时间所在月份的第一天，即某月第一天的0点。如传入time.Now(), 返回当前月份的第一天0点时间。
func GetFirstDateOfMonth(d time.Time) time.Time {
	d = d.AddDate(0, 0, -d.Day()+1)
	return GetZeroTime(d)
}

//获取传入的时间所在月份的最后一天，即某月最后一天的0点。如传入time.Now(), 返回当前月份的最后一天0点时间。
func GetLastDateOfMonth(d time.Time) time.Time {
	return GetFirstDateOfMonth(d).AddDate(0, 1, -1)
}

//获取某一天的0点时间
func GetZeroTime(d time.Time) time.Time {
	return time.Date(d.Year(), d.Month(), d.Day(), 0, 0, 0, 0, d.Location())
}
func GetLastTime(d time.Time) time.Time {
	return time.Date(d.Year(), d.Month(), d.Day(), 23, 59, 59, 59, d.Location())
}

func TimeStrToTime(s string) time.Time {
	now := time.Now()
	locatoin := now.Location()
	t, _ := time.ParseInLocation(TIME_LAYOUT, s, locatoin)
	return t
}

func DateStrToTime(s string) time.Time {
	now := time.Now()
	locatoin := now.Location()
	t, _ := time.ParseInLocation(TIME_DATE_LAYOUT, s, locatoin)
	return t
}

func DateStrToZeroTime(s string) time.Time {
	var sTime string = s
	if len(s) > 10 {
		sTime = s[:10]
	}
	t := DateStrToTime(sTime)
	t = GetZeroTime(t)
	return t
}

func DateStrToLastTime(s string) time.Time {
	var sTime string = s
	if len(s) > 10 {
		sTime = s[:10]
	}
	t := DateStrToTime(sTime)
	t = GetLastTime(t)
	return t
}

func DateToStr(t time.Time) string {
	s := t.Format(TIME_DATE_LAYOUT)
	return s
}

func TimeToStr(t time.Time) string {
	s := t.Format(TIME_LAYOUT)
	return s
}