using System;
using System.Collections.Generic;
using System.Globalization;
using ET;

namespace GFGGame
{
    public partial class TimeUtil
    {
        public static int HOURS_PER_DAY = 24; //每天的小时数
        public static int MUNITE_PER_HOUR = 60; //每小时的分钟数
        public static int SECOND_PER_MUNITE = 60; //每分钟的秒数
        public static long SECOND_PER_HOUR = 3600; //一小时的秒数
        public static long SECOND_PER_DAY = 86400; //一天的秒数
        public static long SECOND_PER_WEEK = 604800; //一个星期的妙数
        public static long FIRST_YEAR_ZERO_POINT_MUNITE = 57600; //计算机元年第二天的0点，即1970-01-02 00:00:00的时间戳 57600 秒级

        //NextZeroTime
        public static int NextZeroSecs
        {
            get
            {
                //转换为时间对象必须使用此接口
                DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
                var todayZero = new DateTime(current.Year, current.Month, current.Day, 0, 0, 0);
                if (current.Ticks < todayZero.Ticks)
                {
                    //转换为时间戳必须使用此接口
                    return (int)(TimeInfo.Instance.Transition(todayZero) / 1000);
                }

                var timeSpan = new TimeSpan(24, 0, 0);
                var tomorrowZero = todayZero.Add(timeSpan);
                return (int)(TimeInfo.Instance.Transition(tomorrowZero) / 1000);
            }
        }


        public static int NextResetSecs
        {
            get
            {
                //转换为时间对象必须使用此接口
                DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
                var today5 = new DateTime(current.Year, current.Month, current.Day, GameConst.DAILY_RESET_HOUR, 0, 0);
                if (current.Ticks < today5.Ticks)
                {
                    //转换为时间戳必须使用此接口
                    return (int)(TimeInfo.Instance.Transition(today5) / 1000);
                }

                TimeSpan timeSpan = new TimeSpan(24, 0, 0);
                var tomorrow5 = today5.Add(timeSpan);
                return (int)(TimeInfo.Instance.Transition(tomorrow5) / 1000);
            }
        }

        public static int NextWeekSecs
        {
            get
            {
                var current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
                var monday = current.AddDays(-(int)current.DayOfWeek + 1).Date;
                var mondayFive = monday.AddHours(GameConst.DAILY_RESET_HOUR);
                if (current.Ticks < mondayFive.Ticks)
                {
                    //转换为时间戳必须使用此接口
                    return (int)(TimeInfo.Instance.Transition(mondayFive) / 1000);
                }

                mondayFive = mondayFive.AddDays(7);
                return (int)(TimeInfo.Instance.Transition(mondayFive) / 1000);
            }
        }

        public static int NextMouthSecs
        {
            get
            {
                var current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
                var firstDay = current.AddDays(1 - current.Day).Date;
                var firstDayFive = firstDay.AddHours(GameConst.DAILY_RESET_HOUR);
                if (current.Ticks < firstDayFive.Ticks)
                {
                    //转换为时间戳必须使用此接口
                    return (int)(TimeInfo.Instance.Transition(firstDayFive) / 1000);
                }

                firstDayFive = firstDayFive.AddMonths(1);
                return (int)(TimeInfo.Instance.Transition(firstDayFive) / 1000);
            }
        }

        public static int NextYearSecs
        {
            get
            {
                var current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
                var firstDay = current.AddDays(1 - current.DayOfYear).Date;
                var firstDayFive = firstDay.AddHours(GameConst.DAILY_RESET_HOUR);
                if (current.Ticks < firstDayFive.Ticks)
                {
                    //转换为时间戳必须使用此接口
                    return (int)(TimeInfo.Instance.Transition(firstDayFive) / 1000);
                }

                firstDayFive = firstDayFive.AddYears(1);
                return (int)(TimeInfo.Instance.Transition(firstDayFive) / 1000);
            }
        }

        public static long TodayRestTime()
        {
            var current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            var today5 = new DateTime(current.Year, current.Month, current.Day, GameConst.DAILY_RESET_HOUR, 0, 0);
            //转换为时间戳必须使用此接口
            return TimeInfo.Instance.Transition(today5);
        }


        //星期天是0，依次递增
        public static bool CheckDayOfWeek(int dayOfWeek)
        {
            //转换为时间对象必须使用此接口
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            if ((int)current.DayOfWeek == dayOfWeek)
            {
                return true;
            }

            return false;
        }

        //星期天是0，依次递增
        public static bool CheckDayOfWeek(int[] dayOfWeeks)
        {
            if (dayOfWeeks.Length == 0)
            {
                return true;
            }

            //转换为时间对象必须使用此接口
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            foreach (var dayOfWeek in dayOfWeeks)
            {
                if ((int)current.DayOfWeek == dayOfWeek)
                {
                    return true;
                }
            }

            return false;
        }
        public static bool CheckDayOfWeek(List<int> dayOfWeeks)
        {
            if (dayOfWeeks.Count == 0)
            {
                return true;
            }

            //转换为时间对象必须使用此接口
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            foreach (var dayOfWeek in dayOfWeeks)
            {
                if ((int)current.DayOfWeek == dayOfWeek)
                {
                    return true;
                }
            }

            return false;
        }

        //检测两个时间是否为同一天
        public static bool CheckIsSameTime(long time1, long time2)
        {
            DateTime date1 = TimeInfo.Instance.ToDateTime(time1);
            string str1 = date1.ToString("yyyy-MM-dd ");
            DateTime date2 = TimeInfo.Instance.ToDateTime(time2);
            string str2 = date2.ToString("yyyy-MM-dd ");

            return str1 == str2;
        }

        /// <summary>
        /// 检测两个时间是否为同一天(秒时间戳入参)
        /// </summary>
        /// <param name="time1"></param>
        /// <param name="time2"></param>
        /// <returns></returns>
        public static bool CheckIsSameTimeExt(long time1, long time2)
        {
            long daysDifference = DaysDifference(time1, time2);
            if (daysDifference == 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        //两个时间戳的差值天数（秒 时间戳入参），结果为正负，假设：time1 < time2 的话，差值为-1
        public static long DaysDifference(long time1, long time2)
        {
            //先设置一个计算机元年第二天的0点，即1970-01-02 00:00:00的时间戳（FIRST_YEAR_ZERO_POINT_MUNITE=57600,有两个时间戳字段x和y，假设x和y满足,(x - m) / 86400 - (y - m) / 86400 = 0，即x和y处在同一天。（其中 / 表示整除）
            return (time1 - FIRST_YEAR_ZERO_POINT_MUNITE) / SECOND_PER_DAY -
                   (time2 - FIRST_YEAR_ZERO_POINT_MUNITE) / SECOND_PER_DAY;
        }

        //检查今天是否是指定日子
        public static bool CheckDayOfMonth(int dayOfMonth)
        {
            //转换为时间对象必须使用此接口
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            if ((int)current.Day == dayOfMonth)
            {
                return true;
            }

            return false;
        }

        /// <summary>
        ///判断是否在当前服务器时间之前
        /// </summary>
        /// <param name="time"> 策划配置时间串 格式 [年][月][日][时:分]</param>
        /// <param name="isSame">是否检查时间相等, 默认不检查</param>
        /// <returns></returns>
        public static bool IsBeforeCurTime(string time, bool isSame = false)
        {
            if (time.Contains("24:00:00"))
            {
                time = time.Replace("24:00:00", "23:59:59");
            }

            if (time.Contains("24:00"))
            {
                time = time.Replace("24:00", "23:59:59");
            }

            DateTime date = GetDateTime(time);

            // if (time.EndsWith("24:00:00"))
            // {
            //     time = time.Substring(0, time.Length - 8) + " 23:59:59";
            // }
            // DateTime date = DateTime.Parse(time);
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            if (isSame)
            {
                return date <= current;
            }

            return date < current;
        }

        /// <summary>
        /// 判断是否在当前服务器时间之后
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static bool IsLaterCurTime(string time)
        {
            if (time.Contains("24:00:00"))
            {
                time = time.Replace("24:00:00", "23:59:59");
            }

            if (time.Contains("24:00"))
            {
                time = time.Replace("24:00", "23:59");
            }

            DateTime date = GetDateTime(time);
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            return date > current;
        }

        /// <summary>
        /// 将utc时间转换成时间戳
        /// </summary>
        /// <param name="time"></param>
        /// <returns></returns>
        public static long DateTimeToTimestamp(string time)
        {
            // if (time.EndsWith("24:00:00"))
            // {
            //     time = time.Substring(0, time.Length - 8) + " 23:59:59";
            // }
            //
            // DateTime date = DateTime.Parse(time);
            if (time.Contains("24:00:00"))
            {
                time = time.Replace("24:00:00", "23:59:59");
            }

            if (time.Contains("24:00"))
            {
                time = time.Replace("24:00", "23:59");
            }

            DateTime date = GetDateTime(time);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 根据时间戳获取当天指定时间（如传入当天7点的时间戳获取当天5点的时间戳）
        /// </summary>
        /// <param name="timeMilliSec">时间戳，单位毫秒</param>
        /// <returns></returns>
        public static long GetDayTimeBySec(long timeMilliSec, string time = "00:00:00")
        {
            DateTime date = TimeInfo.Instance.ToDateTime(timeMilliSec);
            string str = date.ToString("yyyy-MM-dd ") + time;
            DateTime date1 = DateTime.Parse(str);
            return TimeInfo.Instance.Transition(date1);
        }

        /// <summary>
        /// 获取明天指定时间的时间戳,返回毫秒
        /// </summary>
        /// <returns></returns>
        public static long GetTomorrowTime(string time = "00:00:00")
        {
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            DateTime dt = current.AddDays(1);
            string str = dt.ToString("yyyy-MM-dd ") + time;
            DateTime date = DateTime.Parse(str);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取下月一号指定时间的时间戳,返回毫秒
        /// /// </summary>
        /// <returns></returns>
        public static long GetNextMonthTime(string time = "00:00:00")
        {
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            DateTime date = DateTime.Parse(current.ToString("yyyy-MM-01 ")).AddMonths(1);
            string str = date.ToString("yyyy-MM-dd ") + time;
            date = DateTime.Parse(str);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取下周一指定时间的时间戳,返回毫秒
        /// /// </summary>
        /// <returns></returns>
        public static long GetNextWeekTime(string time = "00:00:00")
        {
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int week = Convert.ToInt32(current.DayOfWeek);
            week = week == 0 ? 7 : week;
            var start_time_next_week = current.AddDays(1 - week + 7).ToString("yyyy-MM-dd ") + time;
            DateTime date = DateTime.Parse(start_time_next_week);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取下周一指定时间的时间戳,返回毫秒
        /// /// </summary>
        /// <returns></returns>
        public static long GetNextWeekTime(int _week, string time = "00:00:00")
        {
            _week = _week == 0 ? 7 : _week;

            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int _curweek = Convert.ToInt32(current.DayOfWeek);
            _curweek = _curweek == 0 ? 7 : _curweek;

            var end_time_last_week = current.AddDays(_week - _curweek + 7).ToString("yyyy-MM-dd ") + time;
            DateTime date = DateTime.Parse(end_time_last_week);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取本周某天指定时间时间戳，返回毫秒
        /// </summary>
        /// <returns></returns>
        public static long GetCurWeekTime(int _week, string time = "00:00:00")
        {
            _week = _week == 0 ? 7 : _week;

            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int _curweek = Convert.ToInt32(current.DayOfWeek);
            _curweek = _curweek == 0 ? 7 : _curweek;

            var start_time_current_week = current.AddDays(_week - _curweek).ToString("yyyy-MM-dd ") + time;
            DateTime date = DateTime.Parse(start_time_current_week);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取上周某天指定时间时间戳，返回毫秒
        /// /// </summary>
        /// <returns></returns>
        public static long GetLastWeekTime(int _week, string time = "00:00:00")
        {
            _week = _week == 0 ? 7 : _week;

            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int _curweek = Convert.ToInt32(current.DayOfWeek);
            _curweek = _curweek == 0 ? 7 : _curweek;

            var end_time_last_week = current.AddDays(_week - _curweek - 7).ToString("yyyy-MM-dd ") + time;
            DateTime date = DateTime.Parse(end_time_last_week);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取今天时间时间戳，返回毫秒
        /// </summary>
        /// <returns/>
        public static long GetCurDayTime(string time = "00:00:00")
        {
            var current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            var targetTimeStar = current.ToString("yyyy-MM-dd ") + time;
            var date = DateTime.Parse(targetTimeStar);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取下一个指定时间
        /// </summary>
        /// <param name="time"></param>
        public static long GetNextTime(string time = "00:00:00")
        {
            var curDayTime = GetCurDayTime(time);
            var curTime = TimeInfo.Instance.ServerNow();
            return curDayTime > curTime ? curDayTime : GetTomorrowTime(time);
        }


        private static readonly string[] Formats =
        {
            "HH:mm",
            "'['yyyy']['M']['dd']'",
            "'['yyyy']['MM']['d']'",
            "'['yyyy']['M']['d']'",
            "'['yyyy']['MM']['dd']'",
            "'['yyyy']['MM']['dd']['HH:mm']'",
            "'['yyyy']['MM']['dd']['H:mm']'",
            "'['yyyy']['M']['dd']['HH:mm']'",
            "'['yyyy']['M']['dd']['H:mm']'",
            "'['yyyy']['MM']['d']['HH:mm']'",
            "'['yyyy']['MM']['d']['H:mm']'",
            "'['yyyy']['M']['d']['HH:mm']'",
            "'['yyyy']['M']['d']['H:mm']'",
            "'['yyyy']['MM']['dd']['HH:mm:ss']'",
            "'['yyyy']['M']['dd']['HH:mm:ss']'",
            "'['yyyy']['MM']['d']['HH:mm:ss']'",
            "'['yyyy']['M']['d']['HH:mm:ss']'",
        };

        public static DateTime GetDateTime(string timeStr)
        {
            if (DateTime.TryParseExact(timeStr, Formats, null, DateTimeStyles.None, out var result))
            {
                return result;
            }

            throw new FormatException($"Invalid date format. timeStr:{timeStr}");
        }

        //转换成时间戳，单位毫秒
        public static long GetTimestamp(string timeStr)
        {
            var dateTime = GetDateTime(timeStr);
            return TimeInfo.Instance.Transition(dateTime);
        }

        //当前时间加N天
        public static long AddDays(int day)
        {
            return TimeInfo.Instance.ServerNow() + day * SECOND_PER_DAY * 1000;
        }

        /// <summary>
        ///  获取指定年月位周几， 周一为1  周日为7
        /// </summary>
        /// <param name="month"></param>
        /// <param name="day"></param>
        /// <returns>周几</returns>
        public static int GetWeekday(int month, int day)
        {
            TimeInfo.Instance.ServerNow();
            var date = new DateTime(DateTime.Now.Year, month, day);
            var weekdayNum = (int)date.DayOfWeek + 1;
            if (weekdayNum == 7)
            {
                weekdayNum = 1;
            }

            return weekdayNum;
        }

        /// <summary>
        /// 判断当前时间是否在时间段内
        /// </summary>
        public static bool IsInTime(string startTimeStr, string endTimeStr)
        {
            var startTime = GetDateTime(startTimeStr);
            var endTime = GetDateTime(endTimeStr);
            var dateTime = DateTime.Now;
            return dateTime >= startTime && dateTime < endTime;
        }

        /// <summary>
        /// 获取日清时间戳  格式 ['yyyy']['M']['dd'] ['yyyy']['MM']['d'] 等  会自动加到真实日清时间点 GameConst.DAILY_RESET_HOUR
        /// 返回到DateTime
        /// </summary>
        public static DateTime GetResetTime(string timeStr)
        {
            var time = GetDateTime(timeStr);
            var resetTime = new DateTime(time.Year, time.Month, time.Day, GameConst.DAILY_RESET_HOUR, 0, 0);
            return resetTime;
        }

        public static long GetResetTimeSec(string timeStr)
        {
            var dateTime = GetResetTime(timeStr);
            return TimeInfo.Instance.Transition(dateTime);
        }

        /// <summary>
        /// 当前时间是否在传入时间日清时间之后
        /// </summary>
        public static bool IsAfterResetTime(string timeStr)
        {
            var resetTime = GetResetTime(timeStr);
            return DateTime.Now > resetTime;
        }

        /// <summary>
        /// 获取当前时间属于那一年(1月1号5点前算上一年，5点后算今年)
        /// </summary>
        /// <returns></returns>
        public static int GetCurYear()
        {
            //这个是东8时区的0时间戳,然后去获取服务器时间
            DateTime unixStartTime = new DateTime(1970, 1, 1, 8, 0, 0);
            DateTime dateTime = unixStartTime.AddMilliseconds(TimeHelper.ServerNow());
            if (dateTime.Hour < 5 && dateTime.Month == 1 && dateTime.Day == 1)
            {
                return dateTime.Year - 1;
            }
            else
            {
                return dateTime.Year;
            }
        }

        /// <summary>
        /// 获取服务器 当前时间属于那个月(1号5点前算上个月，5点后算本月)
        /// </summary>
        /// <returns></returns>
        public static int GetCurMonth()
        {
            //这个是东8时区的0时间戳,然后去获取服务器时间
            DateTime unixStartTime = new DateTime(1970, 1, 1, 8, 0, 0);
            DateTime dateTime = unixStartTime.AddMilliseconds(TimeHelper.ServerNow());
            //if (TimeHelper.ServerNow() < TimeUtil.GetCurDayTime(GlobalCfgArray.globalCfg.refreshTime))
            if (dateTime.Hour < 5 && dateTime.Day == 1)
            {
                if (dateTime.Month == 1)
                {
                    return 12;
                }
                else
                {
                    return dateTime.Month - 1;
                }
            }
            else
            {
                return dateTime.Month;
            }
        }

        /// <summary>
        /// 获取当前时间是本月的那一天（5点前算上一天，5点后算当天）
        /// </summary>
        /// <returns></returns>
        public static int GetCurDay()
        {
            int _month = 0;
            //这个是东8时区的0时间戳,然后去获取服务器时间
            DateTime unixStartTime = new DateTime(1970, 1, 1, 8, 0, 0);
            DateTime dateTime = unixStartTime.AddMilliseconds(TimeHelper.ServerNow());
            //if (TimeHelper.ClientNow() < TimeUtil.GetCurDayTime(GlobalCfgArray.globalCfg.refreshTime))
            if (dateTime.Hour < 5)
            {
                if (dateTime.Day == 1)
                {
                    if (dateTime.Month == 1)
                    {
                        _month = 12;
                    }
                    else
                    {
                        _month = dateTime.Month - 1;
                    }

                    return DateTime.DaysInMonth(dateTime.Year, _month);
                }
                else
                {
                    return dateTime.Day - 1;
                }
            }
            else
            {
                return dateTime.Day;
            }
        }

        //检查两个时间区间是否有重合
        public static bool CheckTimeOverlap(long start1, long end1, long start2, long end2)
        {
            if (start1 >= start2 && start1 < end2) return true;
            if (end1 >= start2 && end1 < end2) return true;
            return start1 <= start2 && end1 >= end2;
        }

        //通过开始时间结束时间,算出是第几天，  单位毫秒
        public static int GetDayByTime(long startTime, long endTime)
        {
            var day = (endTime - startTime) / (SECOND_PER_DAY * 1000);
            return (int)day;
        }

        //通过开始时间结束时间,算出是第几天,每天5点是一天的开始时间  单位毫秒
        public static int GetDay5(long startTime)
        {
            var serverNow = TimeInfo.Instance.ServerNow();
            var startDay5Time = GetDay5Time(startTime);
            var nowDay5Time = GetDay5Time(serverNow);
            var day = (nowDay5Time - startDay5Time) / (SECOND_PER_DAY * 1000);
            //开始时间在5点之前，算一天
            if (startTime < startDay5Time) day++;
            //当前时间在5点之后，算一天
            if (serverNow > nowDay5Time) day++;
            return (int)day;
        }

        public static long GetDay5Time(long time)
        {
            var date = TimeInfo.Instance.ToDateTime(time);
            var todayFive = new DateTime(date.Year, date.Month, date.Day, 5, 0, 0);
            return TimeInfo.Instance.Transition(todayFive);
        }

        //从一组周几数据中,匹配拿到周几,往前匹配,可用来做开始时间
        public static int GetWeekDay(int[] days)
        {
            // 当前的“周几”数字，周日=0, 周一=1,..., 周六=6
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int today = (int)current.DayOfWeek;

            // 如果数组中包含今天，则返回今天
            if (Array.Exists(days, day => day == today))
            {
                return today;
            }

            // 查找最近的之前的“周几”
            for (int i = 1; i <= 7; i++)
            {
                int previousDay = (today - i + 7) % 7; // 加7和取模是为了保证值在0-6之间
                if (Array.Exists(days, day => day == previousDay))
                {
                    return previousDay;
                }
            }

            // 如果没有找到，则返回数组中的第一个“周几”
            return days[0];
        }

        //从一组周几数据中,匹配拿到周几,往后匹配,可用来做结束时间
        public static int GetNextWeekDay(int[] days)
        {
            // 当前的“周几”数字，周日=0, 周一=1,..., 周六=6
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int today = (int)current.DayOfWeek;

            // 排序days数组以便查找
            Array.Sort(days);

            // 查找最近的下一个“周几”
            foreach (int day in days)
            {
                if (day > today)
                {
                    return day;
                }
            }

            // 如果没有找到下一个“周几”，则返回数组中的第一个，表示下一周的那一天
            return days[0];
        }

        /// <summary>
        /// 从一组周几数据中,匹配拿到周几,往前匹配,可用来做开始时间
        /// </summary>
        /// <param name="days"></param>
        /// <returns></returns>
        public static DateTime GetWeekDayDateTime(int[] days)
        {
            // 获取当前的“周几”数字，周日=0, 周一=1, ..., 周六=6
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int today = (int)current.DayOfWeek;

            // 如果数组中包含今天，则返回今天的日期对象
            if (Array.Exists(days, day => day == today))
            {
                return current.Date; // 返回当天的日期
            }

            // 查找最近的之前的“周几”
            for (int i = 1; i <= 7; i++)
            {
                int previousDay = (today - i + 7) % 7; // 加7和取模是为了保证值在0-6之间
                if (Array.Exists(days, day => day == previousDay))
                {
                    DateTime previousDateTime = current.AddDays(-i);
                    return previousDateTime.Date; // 返回之前的日期
                }
            }

            // 如果没有找到，则返回本周第一个“周几”的日期
            DateTime firstDay = current.AddDays((days[0] - today + 7) % 7);
            return firstDay.Date;
        }

        /// <summary>
        /// 从一组周几数据中,匹配拿到周几,往后匹配,可用来做结束时间
        /// </summary>
        /// <param name="days"></param>
        /// <returns></returns>
        public static DateTime GetNextWeekDayDateTime(int[] days)
        {
            // 获取当前的“周几”数字，周日=0, 周一=1, ..., 周六=6
            DateTime current = TimeInfo.Instance.ToDateTime(TimeInfo.Instance.ServerNow());
            int today = (int)current.DayOfWeek;

            // 排序days数组以便查找
            Array.Sort(days);

            // 查找最近的下一个“周几”
            foreach (int day in days)
            {
                if (day > today)
                {
                    DateTime nextDateTime = current.AddDays(day - today);
                    return nextDateTime.Date; // 返回下一个工作日的日期
                }
            }

            // 如果没有找到下一个“周几”，返回本周的第一个工作日的日期
            DateTime firstDay = current.AddDays((days[0] + 7 - today) % 7);
            return firstDay.Date;
        }

        /// <summary>
        /// 获取今指定时间的时间戳，返回毫秒
        /// </summary>
        /// <returns/>
        public static long GetAppointedTime(DateTime dateTime, string time = "00:00:00")
        {
            var targetTimeStar = dateTime.ToString("yyyy-MM-dd ") + time;
            var date = DateTime.Parse(targetTimeStar);
            return TimeInfo.Instance.Transition(date);
        }

        /// <summary>
        /// 获取周几 N点的时间
        /// </summary>
        /// <param name="dayOfWeek">DayOfWeek.Wednesday</param>
        /// <param name="hour"></param>
        /// <returns></returns>
        public static long GetNextWednesdayAm(int dayOfWeek, int hour)
        {
            DateTime now = DateTime.UtcNow;
            DayOfWeek currentDayOfWeek = now.DayOfWeek;
            int daysUntilWednesday = (dayOfWeek - (int)currentDayOfWeek + 7) % 7;

            // 如果今天已经过了周三，就计算下周的
            if (daysUntilWednesday == 0 && now.Hour >= hour)
            {
                daysUntilWednesday = 7; // 下周的周三
            }

            DateTime nextWednesday = now.Date.AddDays(daysUntilWednesday).AddHours(hour);
            return TimeInfo.Instance.Transition(nextWednesday);
        }

        // 将 DateTime 转换为 Unix 时间戳
        public static long ConvertToUnixTimestamp(DateTime date)
        {
            DateTime unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            TimeSpan timeSpan = date.ToUniversalTime() - unixEpoch;
            return (long)timeSpan.TotalSeconds;
        }
        
    }
}