package timez

import (
	"joybuywork/internal/consts"
	"joybuywork/internal/utils"
	"time"

	"github.com/golang-module/carbon/v2"
)

var utc = map[int32]string{
	-12: "UTC-12", -11: "UTC-11", -10: "UTC-10",
	-9: "UTC-9", -8: "UTC-8", -7: "UTC-7",
	-6: "UTC-6", -5: "UTC-5", -4: "UTC-4",
	-3: "UTC-3", -2: "UTC-2", -1: "UTC-1",
	0: "UTC",
	1: "UTC+1", 2: "UTC+2", 3: "UTC+3",
	4: "UTC+4", 5: "UTC+5", 6: "UTC+6",
	7: "UTC+7", 8: "UTC+8", 9: "UTC+9",
	10: "UTC+10", 11: "UTC+11", 12: "UTC+12",
}

type Time struct {
}

const (
	ShortDateOnly = "20060102"
	ListDate      = "2006/01/02 15:04:05" // 列表使用的时间格式
	PointYmdHi    = "2006.01.02 15:04"    // 点样式时间格式
)

// GMT 北京时间的时间戳变成GMT时间时间戳
func GMT(tt int64, tOffset int32) int64 {
	if tt == 0 {
		return 0
	}
	return tt + int64((consts.CampaignTzOffset-tOffset)*3600)
}

// GMTInsideEndless 转换成GMT时间做区间比较，如果为结束为0代表正无穷
func GMTInsideEndless(tOffset int32, start, end int64, vals ...int64) bool {
	var val = time.Now().Unix()
	if len(vals) > 0 {
		val = vals[0]
	}

	start, end = GMT(start, tOffset), GMT(end, tOffset)

	if end == 0 {
		return val >= start
	}

	return val >= start && val <= end
}

// STZ GMT时间的时间戳变成北京时间时间戳
func STZ(tt int64, tOffset int32) int64 {
	if tt == 0 {
		return 0
	}
	return tt + int64((tOffset-consts.CampaignTzOffset)*3600)
}

// GMTCarbon GMT的carbon组件
func GMTCarbon(tOffset int32) carbon.Carbon {
	return carbon.SetLocation(Location(tOffset))
}

// GMTTime GMT的time组件
func GMTTime(tOffset int32, sec ...int64) time.Time {
	if len(sec) > 0 && sec[0] > 0 {
		return time.Unix(sec[0], 0).In(Location(tOffset))
	}

	return time.Now().In(Location(tOffset))
}

// GMTTimeStart GMT的time组件变成那一天的开始
func GMTTimeStart(tOffset int32, sec ...int64) (time.Time, error) {
	t := GMTTime(tOffset, sec...)

	// 当地是哪一天的
	day := t.Format(time.DateOnly)

	// 变成当天的开始
	return time.ParseInLocation(time.DateOnly, day, Location(tOffset))
}

// GMTStartAndEndTs 基于时区的开始和结束 如：2024-10-19 00:00:00 - 2024-10-19 23:59:59
func GMTStartAndEndTs(tOffset int32, sec ...int64) (day string, start, end int64) {
	st, _ := GMTTimeStart(tOffset, sec...)

	return st.Format(time.DateOnly), st.Unix(), st.Unix() + 86399
}

// GetWeekEnd 获取某个节点一周的开始和结束 如：2024-10-19 00:00:00 - 2024-10-26 23:59:59
func GetWeekEnd(tOffset, weekNum int32) (start, end int64) {
	t, _ := GMTTimeStart(tOffset)
	w := utils.Ternary[int32](t.Weekday() == 0, 7, int32(t.Weekday()))

	var ws int64 = 7 * 86400
	if w < weekNum {
		end = t.Unix() + int64((weekNum-w)*86400)
	} else {
		end = t.Unix() + int64((7-(w-weekNum))*86400)
	}

	return end - ws, end - 1
}

// Location 活动时区
func Location(tOffset int32) *time.Location {
	return time.FixedZone(utc[tOffset], int(tOffset)*3600)
}