package tools

import (
	"fmt"
	"strings"
	"time"
)

// GetUtcTime 获取本地时间戳
func GetUtcTime(tm time.Time) int64 {
	return tm.Unix() //- 8*60*60
}

// UnixToTime 时间戳转换为time
func UnixToTime(timestamp int64) time.Time {
	return time.Unix(timestamp, 0)
}

// GetHour 当前时间向上取整点
func GetHour(timestamp int64) int {
	//	formaTime := time.Format("2006-01-02 15:04:05")
	tm := time.Unix(timestamp, 0)
	return tm.Hour()
}

// GetLastDayCurrentTime 获取offset天的现在时间:注意时区
func GetLastDayCurrentTime(timestamp int64, offset int) time.Time {
	tm := time.Unix(timestamp, 0)
	yesDay := tm.AddDate(0, 0, 1*offset)
	return yesDay
}

// GetTimeWeek 获取给定时间的星期
func GetTimeWeek(timestamp int64) int {
	tm := time.Unix(timestamp, 0)
	weekDay := tm.Weekday().String()
	var week int = 0
	switch weekDay {
	case "Monday":
		week = 1
	case "Tuesday":
		week = 2
	case "Wednesday":
		week = 3
	case "Thursday":
		week = 4
	case "Friday":
		week = 5
	case "Saturday":
		week = 6
	default:
		week = 0
	}
	return week
}

// GetHour0 获取向上整时时间
func GetHour0(timestamp int64) time.Time {
	tm := time.Unix(timestamp, 0)
	tStr := tm.Format("2006-01-02 15") + ":00:00"
	return StrToTime(tStr, "2006-01-02 15:04:05", nil)
}

// GetUtcHour0 获取向上整时时间
func GetUtcHour0(tm time.Time) int64 {
	return tm.Unix() - int64(tm.Second()) - int64((60 * tm.Minute()))
}

// GetUtcMinute0 获取向上整时时间
func GetUtcMinute0(tm time.Time) int64 {
	return tm.Unix() - int64(tm.Second())
}

// GetDay0 获取给定日期的零点时间
func GetDay0(timestamp int64) time.Time {
	tm := time.Unix(timestamp, 0)
	tStr := tm.Format("2006-01-02") + " 00:00:00"

	return StrToTime(tStr, "2006-01-02 15:04:05", nil)
}

// GetUtcDay0 获取给定日期的零点时间
func GetUtcDay0(tm time.Time) int64 {
	return tm.Unix() - int64(tm.Second()) - int64(60*tm.Minute()) - int64(60*60*tm.Hour())
}

// // GetUtcDay0 获取offset 0点时间
// func GetUtcDay0(now time.Time, timeZone *time.Location) int64 {
// 	tm := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
// 	return tm.Unix()
// }

// StrToTime 字符串转时间
func StrToTime(tStr, format string, timeZone *time.Location) time.Time {
	if len(format) == 0 {
		format = "2006-01-02 15:04:05"
	}
	if timeZone == nil {
		//chinaLocal, _ := time.LoadLocation("Local")
		timeZone = time.Local
	}

	ti, _ := time.ParseInLocation(format, tStr, timeZone)
	return ti
}

// StringTimetoUnix 给定字符串时间转换成本地时间戳
func StringTimetoUnix(timestr string) int64 {
	return StrToTime(timestr, "2006-01-02 15:04:05", time.Local).Unix()
}

// GetWeek0 获取最近上个星期天的零点日期
func GetWeek0(timestamp int64) time.Time {
	weekday := GetTimeWeek(timestamp)
	tm0 := GetDay0(timestamp)
	return tm0.AddDate(0, 0, -1*weekday)
}

// GetUtcWeek0 获取最近上个星期天的零点日期
func GetUtcWeek0(timestamp int64) int64 {
	weekday := GetTimeWeek(timestamp)
	tm0 := GetDay0(timestamp)
	tm0 = tm0.AddDate(0, 0, -1*weekday)

	return tm0.Unix()
}

// GetMonth0 获取给定时间的当月1号零点时间
func GetMonth0(timestamp int64) time.Time {
	tm0 := GetDay0(timestamp)
	month0 := tm0.Day() - 1
	tm0 = tm0.AddDate(0, 0, -1*month0) //这个月1号
	return tm0
}

// TimerByHour 整点执行操作
func TimerByHour(f func()) {
	for {
		now := time.Now()
		// 计算下一个整点
		next := now.Add(time.Hour * 1)
		next = time.Date(next.Year(), next.Month(), next.Day(), next.Hour(), 0, 0, 0, next.Location())
		t := time.NewTimer(next.Sub(now))
		<-t.C
		//以下为定时执行的操作
		f()
	}
}

// GetLocalTime 获取本地时间
func GetLocalTime(tm time.Time) time.Time {
	local, _ := time.LoadLocation("Local")
	return tm.In(local)
	//return tm.Add(8 * 60 * 60 * time.Second)
}

// GetSysTimeLayout 获取系统时间的格式
func GetSysTimeLayout() string {
	t := time.Date(2006, 1, 2, 15, 4, 5, 0, time.UTC)
	strLayout := strings.Replace(t.String(), "+0000 UTC", "", -1)
	return strings.TrimSpace(strLayout)
}

// FormatTime 格式化时间
func FormatTime(tm time.Time, forStr string) string {
	return tm.Format(forStr)
}

// GetTimeStr 获取时间字符串
func GetTimeStr(tm time.Time) string {
	return FormatTime(tm, "2006-01-02 15:04:05")
}

// GetDayStr 获取日期字符串
func GetDayStr(tm time.Time) string {
	return FormatTime(tm, "2006-01-02")
}

// Time json marsh 重写
type Time struct {
	time.Time
}

// UnmarshalJSON ...
func (t *Time) UnmarshalJSON(data []byte) (err error) {
	tmp := string(data)
	str := `"2006-01-02 15:04:05"`
	if len(tmp) <= 20 {
		str = `"2006-01-02"`
	}
	if tmp != `""` {
		now, err1 := time.ParseInLocation(str, tmp, time.Local)
		err = err1
		*t = Time{now}
	}

	return
}

// MarshalJSON ...
func (t Time) MarshalJSON() ([]byte, error) {
	var stamp = fmt.Sprintf(`"%s"`, t.Format("2006-01-02 15:04:05"))
	return []byte(stamp), nil
}

// String ...
func (t Time) String() string {
	return t.Format("2006-01-02 15:04:05")
}