using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Sog
{
    public static class ConfigStringTimeParse
    {
        public static long ParseConfigTime(string time)
        {
            if (string.IsNullOrEmpty(time))
            {
                return 0;
            }

            DateTime result;
            bool bSuccess = DateTime.TryParse(time, out result);
            if (bSuccess == false)
            {
                return 0;
            }
            long timeSecond = AppTime.GetTimeSecond(result);
            return timeSecond;
        }
        /// <summary>
        /// 获取当地服务器时区时间，
        /// 以本地时区为准。
        /// </summary>
        /// <param name="time">来源时间</param>
        /// <param name="localTimeZone">本地时区，最终时区</param>
        /// <param name="targetTimeZone">来源时区</param>
        /// <returns></returns>
        public static long ParseConfigTimeWithTimeZone(string time, int localTimeZone, int targetTimeZone)
        {
            if (string.IsNullOrEmpty(time))
            {
                return 0;
            }

            DateTime result;
            bool bSuccess = DateTime.TryParse(time, out result);
            if (bSuccess == false)
            {
                return 0;
            }

            long timeSecond = AppTime.GetTimeSecond(result);
            //0也是时区！
            //if (targetTimeZone != 0)
            {
                long diffTimeZone = (localTimeZone - targetTimeZone) * 3600;
                timeSecond += diffTimeZone;
            }
            return timeSecond;
        }
        /// <summary>
        /// 兼容AddServerTime的时间判断,时间填的是一天里的时间，比如10:12:16
        /// </summary>
        /// <param name="dailyTime"></param>
        /// <returns></returns>
        public static long ParseDailyConfigTime(long nowSecond, string dailyTime)
        {
            if (string.IsNullOrEmpty(dailyTime))
            {
                return 0;
            }

            DateTime now = AppTime.ConvertUnixTimeToDateTime(nowSecond * 1000);
            string stringNow = now.ToString("u").Substring(0, 11);
            string descStartTime = stringNow + dailyTime;

            DateTime result;
            bool bSuccess = DateTime.TryParse(descStartTime, out result);
            if (bSuccess == false)
            {
                return 0;
            }

            long timeSecond = AppTime.GetTimeSecond(result);

            return timeSecond;
        }

        public static bool ParseConfigTime(string time, out DateTime dateTime)
        {
            dateTime = DateTime.Now;

            if (string.IsNullOrEmpty(time))
            {
                return false;
            }

            //DateTime result;
            bool bSuccess = DateTime.TryParse(time, out dateTime);
            if (bSuccess == false)
            {
                return false;
            }

            return true;
        }
    }
}