using System;
using System.Collections.Generic;
using System.Text;

namespace APT.Infrastructure.Core
{
	public class APTThreadTimeRuleParam
	{
		private ThreadTimeRuleLoopType _type;

		public APTThreadTimeRuleParam(ThreadTimeRuleLoopType type)
		{
			_type = type;
		}

		public ThreadTimeRuleLoopType Type { get { return _type; } }

		public int InternalTime { get; set; } 

		public int FiexedDay { get; set; }
		public int FiexedHour { get; set; }
		public int FiexedMinute { get; set; }
		public int FiexedSecond { get; set; }
		public int FiexedMonth { get; set; }
		public int FiexedYear { get; set; }

		public DateTime FiexedTime { get; set; }
	}
	public class APTThreadTimeRule
	{
		private ThreadTimeRuleType _rule = ThreadTimeRuleType.ExecuteOne;
		private int DefaultInternal = 1;
		private APTThreadTimeRuleParam _param;

		public APTThreadTimeRuleParam Param
		{
			get { return _param; }
		}
		public APTThreadTimeRule(ThreadTimeRuleType rule, APTThreadTimeRuleParam param)
		{
			_rule = rule;
			_param = param;
		}

		public bool NextRuleTime(ref DateTime time)
		{
			bool result = false;
			DateTime t = time;
			switch (_rule)
			{
				case ThreadTimeRuleType.EveryDayLoopByTime:
					if (this.Param.Type == ThreadTimeRuleLoopType.Hour)
						t = t.AddHours(this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					else if (this.Param.Type == ThreadTimeRuleLoopType.Second)
						t = t.AddSeconds(this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					else if (this.Param.Type == ThreadTimeRuleLoopType.Minute)
						t = t.AddMinutes( this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					else if (this.Param.Type == ThreadTimeRuleLoopType.Day)
						t = t.AddDays(this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					else if (this.Param.Type == ThreadTimeRuleLoopType.Month)
						t = t.AddMonths( this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					else if (this.Param.Type == ThreadTimeRuleLoopType.Year)
						t = t.AddYears(this.Param.InternalTime <= 0 ? DefaultInternal : this.Param.InternalTime);
					time = t;
					result = true;
					break;
				case ThreadTimeRuleType.EveryDayFiexedTime:
					if ( this.Param.Type == ThreadTimeRuleLoopType.Day)
					{
						t = t.Date.AddDays( this.Param.FiexedDay < 0 ? 1 : this.Param.FiexedDay);
						t = t.AddHours(this.Param.FiexedHour < 1 || this.Param.FiexedHour >= 24 ? 12 : this.Param.FiexedHour);
						t = t.AddMinutes(this.Param.FiexedMinute < 0 || this.Param.FiexedMinute >= 60 ? 0 : this.Param.FiexedMinute);
						t = t.AddSeconds( this.Param.FiexedSecond < 0 || this.Param.FiexedSecond >= 60 ? 0 : this.Param.FiexedSecond);
					}
					else if (this.Param.Type == ThreadTimeRuleLoopType.Hour)
					{
						t = t.Date.AddHours(t.Hour + (this.Param.FiexedHour < 0 ? 1 : this.Param.FiexedHour));
						t = t.AddMinutes( this.Param.FiexedMinute < 0 || this.Param.FiexedMinute >= 60 ? 0 : this.Param.FiexedMinute);
						t = t.AddSeconds( this.Param.FiexedSecond < 0 || this.Param.FiexedSecond >= 60 ? 0 : this.Param.FiexedSecond);
					}
					else if (this.Param.Type == ThreadTimeRuleLoopType.Month)
					{
						int day = t.Day;
						t = t.Date.AddDays(-day).AddMonths(this.Param.FiexedMonth < 0 ? 1 : this.Param.FiexedMonth);
						t = t.AddDays( this.Param.FiexedDay < 1 || this.Param.FiexedDay > MaxDay(t.Year, t.Month) ? 1 : this.Param.FiexedDay);
						t = t.AddHours(this.Param.FiexedHour < 1 || this.Param.FiexedHour >= 24 ? 12 : this.Param.FiexedHour);
						t = t.AddMinutes(this.Param.FiexedMinute < 0 || this.Param.FiexedMinute >= 60 ? 0 : this.Param.FiexedMinute);
						t = t.AddSeconds( this.Param.FiexedSecond < 0 || this.Param.FiexedSecond >= 60 ? 0 : this.Param.FiexedSecond);
					}
					else if (this.Param.Type == ThreadTimeRuleLoopType.Year)
					{
						int day = t.Day;
						int month = t.Month;
						t = t.Date.AddMonths(-month).AddDays(-day).AddYears( this.Param.FiexedYear < 0 ? 1 : this.Param.FiexedYear);
						t = t.AddMonths(this.Param.FiexedMonth < 1 || this.Param.FiexedMonth > 12 ? 1 : this.Param.FiexedMonth);
						t = t.AddDays(this.Param.FiexedDay < 1 || this.Param.FiexedDay > MaxDay(t.Year, t.Month) ? 1 : this.Param.FiexedDay);
						t = t.AddHours( this.Param.FiexedHour < 1 || this.Param.FiexedHour >= 24 ? 12 : this.Param.FiexedHour);
						t = t.AddMinutes( this.Param.FiexedMinute < 0 || this.Param.FiexedMinute >= 60 ? 0 : this.Param.FiexedMinute);
						t = t.AddSeconds(this.Param.FiexedSecond < 0 || this.Param.FiexedSecond >= 60 ? 0 : this.Param.FiexedSecond);
					}
					if (t > time)
					{
						time = t;
						result = true;
					}
					break;
				case ThreadTimeRuleType.FiexedTime:
					DateTime fiexdTime = this.Param.FiexedTime == null ? DateTime.MinValue : this.Param.FiexedTime;
					if (fiexdTime > t)
					{
						time = t;
						result = true;
					}
					break;
				case ThreadTimeRuleType.Always:
					time = t;
					result = true;
					break;
			}
			return result;
		}

		private int MaxDay(int year, int month)
		{
			int maxDay = 0;//用来标识一月几天
			if (month == 2)
			{
				if (year % 4 == 0)//闰年
				{
					maxDay = 29;
				}
				else
					maxDay = 28;
			}
			else
			{
				switch (month)
				{
					case 1:
					case 3:
					case 5:
					case 7:
					case 8:
					case 10:
					case 12: maxDay = 31; break;
					case 4:
					case 6:
					case 9:
					case 11: maxDay = 30; break;
				}
			}
			return maxDay;
		}
	}
}