package util

import "time"

const (
	DateTimeAsSN   = "20060102150405"
	DateTimeFormat = "2006-01-02 15:04:05"
	DateFormat     = "2006-01-02"
	TimeFormat     = "15:04:05"
)

// TimeLocationBJ 北京、上海、重庆时区
func TimeLocationBJ() *time.Location {
	return time.FixedZone("CST", 28800)
}

// TimeNice 按常用格式输出日期时间
func TimeNice(t time.Time) string {
	return t.In(TimeLocationBJ()).Format(DateTimeFormat)
}

// TimeNowNice 输出当前日期时间
func TimeNowNice() string {
	return time.Now().In(TimeLocationBJ()).Format(DateTimeFormat)
}

// TimeNowAsSN 输出当前日期时间
func TimeNowAsSN() string {
	return time.Now().In(TimeLocationBJ()).Format(DateTimeAsSN)
}

// TimeNowDateNice 输出当前日期
func TimeNowDateNice() string {
	return time.Now().In(TimeLocationBJ()).Format(DateFormat)
}

// TimeNowTimeNice 输出当前时间
func TimeNowTimeNice() string {
	return time.Now().In(TimeLocationBJ()).Format(TimeFormat)
}

// TimeFormStamp 时间戳转时间
func TimeFormStamp(ts int64) string {
	return time.Unix(ts, 0).In(TimeLocationBJ()).Format(DateTimeFormat)
}

// TimeDateFromStamp 时间戳转日期
func TimeDateFromStamp(ts int64) string {
	return time.Unix(ts, 0).In(TimeLocationBJ()).Format(DateFormat)
}

// TimeToStamp 时间转时间戳
func TimeToStamp(str string) (int64, error) {
	if t, err := time.ParseInLocation(DateTimeFormat, str, TimeLocationBJ()); err != nil {
		return 0, err
	} else {
		return t.Unix(), nil
	}
}

// TimeDateToStamp 日期转时间戳
func TimeDateToStamp(str string) (int64, error) {
	if t, err := time.ParseInLocation(DateFormat, str, TimeLocationBJ()); err != nil {
		return 0, err
	} else {
		return t.Unix(), nil
	}
}