XTime = XTime or {}

local floor = math.floor
local CsTime = CS.UnityEngine.Time

local ServerTimeWhenStartupList = {} --客户端启动时，服务器的时间戳
local ServerTimeMaxCount = 10 --保存服务端时间的最大个数
local CurrentSaveIndex = 1 --当前保存到的下标
local ServerTimeWhenStartupAverage = 0 --客户端启动时，服务器的时间戳平局值

local PingTimeList = {}
local PingTimeIndex = 0
local PingTimeLength = 10

-- 一星期中的第几天	(3)[1 - 6 = 星期天 - 星期六]
local WeekOfDay = {
    Sun = 0,
    Mon = 1,
    Tues = 2,
    Wed = 3,
    Thur = 4,
    Fri = 5,
    Sat = 6,
    NorSun = 7
}

local WeekOfDayIndex = {
    [WeekOfDay.Mon] = 1,
    [WeekOfDay.Tues] = 2,
    [WeekOfDay.Wed] = 3,
    [WeekOfDay.Thur] = 4,
    [WeekOfDay.Fri] = 5,
    [WeekOfDay.Sat] = 6,
    [WeekOfDay.Sun] = 7,
    [WeekOfDay.NorSun] = 7
}
local WeekLength = 7
local sec_of_a_day = 24 * 60 * 60
local sec_of_one_hour = 60 * 60
local sec_of_refresh_time = 7 * 60 * 60
XTime.Seconds = {
    Day = sec_of_a_day --86400
}

--==============================--
--desc: 获取服务器当前时间戳
--@return 长整型时间戳，单位（秒）
--==============================--
function XTime.GetServerNowTimestamp()
    local sinceStartup = CsTime.realtimeSinceStartup
    return floor(ServerTimeWhenStartupAverage + sinceStartup)
end

--==============================
 ---@desc 获取本地时间戳
 ---@return 长整型时间戳，单位（秒）
--==============================
function XTime.GetLocalNowTimestamp()
    return CS.XDateUtil.GetNowTimestamp()
end

--==============================--
--desc: 同步时间
--@serverTime: 服务器时间
--@reqTime: 发起请求时间
--@resTime: 收到响应时间
--==============================--
function XTime.SyncTime(serverTime, reqTime, resTime)
    local startup = (reqTime + resTime) * 0.5
    local span = serverTime - startup

    if CurrentSaveIndex > ServerTimeMaxCount then
        CurrentSaveIndex = CurrentSaveIndex - ServerTimeMaxCount
    end
    ServerTimeWhenStartupList[CurrentSaveIndex] = span
    CurrentSaveIndex = CurrentSaveIndex + 1

    local count = #ServerTimeWhenStartupList
    local total = 0
    for _, v in ipairs(ServerTimeWhenStartupList) do
        total = total + v
    end
    ServerTimeWhenStartupAverage = total / count

    local gap = resTime - reqTime
    PingTimeIndex = (PingTimeIndex % PingTimeLength) + 1
    PingTimeList[PingTimeIndex] = gap
    -- print(" ======= ping(ms) ... gap: " .. tostring(gap) .. ", avr:" .. tostring(XTime.GetPingTime()) .. ", i:" .. tostring(PingTimeIndex) .. ", t:" .. tostring(CS.UnityEngine.Time.realtimeSinceStartup))
end

-- 获取网络延时 单位: ms
function XTime.GetPingTime()
    if #PingTimeList == 0 then
        return 0
    end

    local total = 0
    for _, v in ipairs(PingTimeList) do
        total = total + v
    end
    return math.floor(total * 1000) / #PingTimeList
end

function XTime.ClearPingTime()
    PingTimeList = {}
    PingTimeIndex = 0
end

--==============================--
--desc: 时间字符串转服务器时区时间戳
--@dateTimeString: 时间字符串
--@return 转失败返回nil
--==============================--
function XTime.ParseToTimestamp(dateTimeString)
    if dateTimeString == nil or dateTimeString == "" then
        return
    end

    local success, timestamp = CS.XDateUtil.TryParseToTimestamp(dateTimeString)
    if not success then
        XLog.Error("XTime.TryParseToTimestamp parse to timestamp failed. try use ParseToTimestampMDY: " .. tostring(dateTimeString))
        return XTime.ParseToTimestampMDY(dateTimeString)
    end

    return timestamp
end

function XTime.ParseToTimestampMDY(dateTimeString)
    local arr = string.Split(dateTimeString, " ")
    local date = arr[1]
    local time = arr[2]
    local dateArr = string.Split(date, "/")
    local m = dateArr[1]
    local d = dateArr[2]
    local y = dateArr[3]
    dateTimeString = y .. "/" .. m .. "/" .. d .. " " .. time
    local success, timestamp = CS.XDateUtil.TryParseToTimestamp(dateTimeString)
    if not success then
        XLog.Error("XTime.TryParseToTimestamp parse to timestamp failed. invalid time argument: " .. tostring(dateTimeString))
        return -- 该类在CS中不存在，且在1.18版本出现时区格式问题
        -- return CS.XDate.GetTime(dateTimeString)
    end

    return timestamp
end

--时间戳转utc时间字符串
function XTime.TimestampToUtcDateTimeString(timestamp, format)
    format = format or "yyyy-MM-dd HH:mm:ss"
    local dt = CS.XDateUtil.GetUtcDateTime(timestamp)
    return dt:ToString(format)
end

--时间戳转设备本地时间字符串
function XTime.TimestampToLocalDateTimeString(timestamp, format)
    format = format or "yyyy-MM-dd HH:mm:ss"
    local dt = CS.XDateUtil.GetLocalDateTime(timestamp)
    return dt:ToString(format)
end

--时间戳转游戏指定时区时间字符串
function XTime.TimestampToGameDateTimeString(timestamp, format)
    format = format or "yyyy-MM-dd HH:mm:ss"
    local dt = CS.XDateUtil.GetGameDateTime(timestamp)
    return dt:ToString(format)
end

-- c#星期枚举转整形数
function XTime.DayOfWeekToInt(dayOfWeek, isNormlSunDay)
    if dayOfWeek == CS.System.DayOfWeek.Sunday then
        return isNormlSunDay and 7 or 0
    elseif dayOfWeek == CS.System.DayOfWeek.Monday then
        return 1
    elseif dayOfWeek == CS.System.DayOfWeek.Tuesday then
        return 2
    elseif dayOfWeek == CS.System.DayOfWeek.Wednesday then
        return 3
    elseif dayOfWeek == CS.System.DayOfWeek.Thursday then
        return 4
    elseif dayOfWeek == CS.System.DayOfWeek.Friday then
        return 5
    else
        return 6
    end
end

--获取今天时间
function XTime.GetTodayTime(hour, min, sec)
    hour = hour or 0
    min = min or 0
    sec = sec or 0
    local nowTime = XTime.GetServerNowTimestamp()
    local dt = CS.XDateUtil.GetGameDateTime(nowTime)
    return dt.Date:AddHours(hour):AddMinutes(min):AddSeconds(sec):ToTimestamp()
end

function XTime.GeyServerTime(hour, min, sec)
    hour = hour or 0
    min = min or 0
    sec = sec or 0
    local nowTime = XTime.GetServerNowTimestamp()
    local dt = CS.XDateUtil.GetGameDateTime(nowTime)
    dt = dt.Date;
    dt = dt:AddSeconds(sec)
    dt = dt:AddMinutes(min)
    dt = dt:AddHours(hour)
    return dt:ToTimestamp()
end

-- 获取距离下一个星期x的时间,默认每周第一天为周一
function XTime.GetNextWeekOfDayStartWithMon(weekOfDay, offsetTime)
    local needTime
    local nowTime = XTime.GetServerNowTimestamp()
    local dateTime = CS.XDateUtil.GetGameDateTime(nowTime)
    local weekZero = CS.XDateUtil.GetFirstDayOfThisWeek(dateTime):ToTimestamp()

    local resetTime = (WeekOfDayIndex[weekOfDay] - 1) * sec_of_a_day + offsetTime + weekZero
    if nowTime < resetTime then
        needTime = resetTime - nowTime
    else
        needTime = WeekLength * sec_of_a_day - (nowTime - resetTime)
    end

    return needTime
end

-- 获取最近一个未到达的星期X的服务器更新时间
function XTime.GetSeverNextWeekOfDayRefreshTime(weekOfDay)
    local needTime = XTime.GetNextWeekOfDayStartWithMon(weekOfDay, sec_of_refresh_time)
    local nowTime = XTime.GetServerNowTimestamp()
    return nowTime + needTime
end

-- 获取服务器当天5点更新时间戳
function XTime.GetSeverTodayFreshTime()
    local now = XTime.GetServerNowTimestamp()
    local dateTime = CS.XDateUtil.GetGameDateTime(now)
    local dayZero = dateTime.Date:ToTimestamp()

    return dayZero + sec_of_refresh_time
end
--=========================
--获取服务器当天目标时间的时间戳
--oclock : 目标时间，例如晚上8点为20， 8点半为 20.5
--=========================
function XTime.GetServerTodayTargetTime(oclock)
    local now = XTime.GetServerNowTimestamp()
    local dateTime = CS.XDateUtil.GetGameDateTime(now)
    local dayZero = dateTime.Date:ToTimestamp()
    return dayZero + (oclock * sec_of_one_hour)
end

-- 获取服务器明天5点更新时间戳
function XTime.GetSeverTomorrowFreshTime()
    local dayFreshTime = XTime.GetSeverTodayFreshTime()
    return dayFreshTime + sec_of_a_day
end
--=========================
--获取服务器当天目标时间的时间戳
--oclock : 目标时间(例:晚上8点 = 20， 晚上8点30分 = 20.5)
--=========================
function XTime.GetServerTomorrowTargetTime(oclock)
    local dayFreshTime = XTime.GetServerTodayTargetTime(oclock)
    return dayFreshTime + sec_of_a_day
end
-- 获取服务器昨天5点更新时间戳
function XTime.GetSeverYesterdayFreshTime()
    local dayFreshTime = XTime.GetSeverTodayFreshTime()
    return dayFreshTime - sec_of_a_day
end

--获取服务器下一次5点更新时间戳
function XTime.GetSeverNextRefreshTime()
    local nextRefreshTime

    local dayRefreshTime = XTime.GetSeverTodayFreshTime()
    local nowTime = XTime.GetServerNowTimestamp()
    nextRefreshTime = nowTime > dayRefreshTime and XTime.GetSeverTomorrowFreshTime() or dayRefreshTime

    return nextRefreshTime
end
--=========================
--获取服务器下一次目标时间的时间戳
--oclock : 目标时间(例:晚上8点 = 20， 晚上8点30分 = 20.5)
--=========================
function XTime.GetServerNextTargetTime(oclock)
    local nextTargetTime
    local dayTargetTime = XTime.GetServerTodayTargetTime(oclock)
    local nowTime = XTime.GetServerNowTimestamp()
    nextTargetTime = nowTime > dayTargetTime and XTime.GetServerTomorrowTargetTime(oclock) or dayTargetTime
    return nextTargetTime
end
--=========================
--获取服务器到下一次目标时间的剩余时间(单位秒)
--oclock : 目标时间(例:晚上8点 = 20， 晚上8点30分 = 20.5)
--=========================
function XTime.GetServerLeftTimeToTargetTime(oclock)
    local nextTargetTime = XTime.GetServerNextTargetTime(oclock)
    local now = XTime.GetServerNowTimestamp()
    return nextTargetTime - now
end
-- 判断服务器当下是否是周末
function XTime.CheckWeekend()
    local now = XTime.GetServerNowTimestamp()
    local weekday = XTime.GetWeekDay(now, false)

    if weekday == WeekOfDay.Sun then
        return true
    elseif weekday == WeekOfDay.Sat then
        local todayFreshTime = XTime.GetSeverTodayFreshTime()
        return now >= todayFreshTime
    elseif weekday == WeekOfDay.Mon then
        local todayFreshTime = XTime.GetSeverTodayFreshTime()
        return now < todayFreshTime
    else
        return false
    end
end

-- 判断时间戳是周几
function XTime.GetWeekDay(time, isNormlSunDay)
    local dateTime = CS.XDateUtil.GetGameDateTime(time)
    local weekday = XTime.DayOfWeekToInt(dateTime.DayOfWeek, isNormlSunDay)
    return weekday
end

--获取一个时间戳的当天刷新的时间
function XTime.GetTimeDayFreshTime(time)
    local todayRefreshTime

    local dateTime = CS.XDateUtil.GetGameDateTime(time)
    local dayZero = dateTime.Date:ToTimestamp()
    todayRefreshTime = dayZero + sec_of_refresh_time

    return todayRefreshTime
end

function XTime.GetWeekDayText(time)
    local weekDay = XTime.GetWeekDay(time, true)
    if weekDay == 1 then
        return CSXTextManagerGetText("Monday")
    elseif weekDay == 2 then
        return CSXTextManagerGetText("Tuesday")
    elseif weekDay == 3 then
        return CSXTextManagerGetText("Wednesday")
    elseif weekDay == 4 then
        return CSXTextManagerGetText("Thursday")
    elseif weekDay == 5 then
        return CSXTextManagerGetText("Friday")
    elseif weekDay == 6 then
        return CSXTextManagerGetText("Saturday")
    elseif weekDay == 7 then
        return CSXTextManagerGetText("Sunday")
    end
end

--判断两个时间戳是否在同一天
function XTime.IsToday(formTime, toTime)
    local formDateTime = CS.XDateUtil.GetGameDateTime(formTime)
    local toDateTime = CS.XDateUtil.GetGameDateTime(toTime)

    local formDay = formDateTime.Day
    local formMonth = formDateTime.Month
    local formYear = formDateTime.Year

    local toDay = toDateTime.Day
    local toMonth = toDateTime.Month
    local toYear = toDateTime.Year

    return formDay == toDay and formMonth == toMonth and formYear == toYear
end

---判断今天距某个时间戳隔了多少天 正为已过X天 负为还有X天
---@param toTime number|nil
---@param isBaseServer boolean
---@return number
function XTime.GetDayCountUntilTime(toTime, isBaseServer)
    if toTime == nil then
        return 0
    end
    local from_time = XTime.GetServerNowTimestamp()
    local to_Time = isBaseServer and XTime.GetTimeDayFreshTime(toTime) or toTime
    local fromDateTime = CS.XDateUtil.GetGameDateTime(from_time)
    local toDateTime = CS.XDateUtil.GetGameDateTime(to_Time)
    local fromSpan = CS.System.TimeSpan(fromDateTime.Ticks)
    local toSpan = CS.System.TimeSpan(toDateTime.Ticks)
    return math.floor(fromSpan.TotalDays - toSpan.TotalDays)
    -- 服务端刷新时间为基准点
end