using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;

namespace PlaneSale
{
    class Functions
    {
        private System.Threading.Timer timerBegin = null;
        private System.Threading.Timer timerEnd = null;
        private System.Threading.Timer timerWarn = null;
        
        public string GetMessage(string key)
        {
            string str = null;
            try
            {
              str = Global.doc.GetElementsByTagName(key)[0].ChildNodes[0].Value;  
            }
            catch(Exception ex)
            {
                
            }
            return str;    
        }
        
        /// <summary>
        /// 根據輸入的Code和要取得信息的key來取得相應的信息
        /// </summary>
        /// <param name="key"></param>
        /// <param name="code"></param>
        /// <returns></returns>
        public string GetMessageByCode(string key,string code)
        {
            string str = null;
            try
            {
                string tmp = "//info/" + key + "/text()[../../Code/text()='" + code + "']";
                str = Global.doc.SelectSingleNode(tmp).Value;
            }
            catch (Exception ex)
            {

            }
            return str;
        }
        
        /// <summary>
        /// 設定開始時間
        /// </summary>
        private TimeSpan SetBeginTimeSpan()
        {
            DateTime t_now = DateTime.Now;
            DateTime t_begin = DateTime.Parse(Global.BeginTime);
            TimeSpan ts = t_begin.Subtract(t_now);
            int i_day = ts.Days;
            int i_hour = ts.Hours;
            int i_minutes = ts.Minutes;
            int i_second = ts.Seconds;
            if (i_day >= 0 && i_hour >= 0 && i_minutes >= 0 && i_second >= 0)
            {
               Global.form.AddMessage(string.Format("離活動開始還有{0}天{1}小時{2}分{3}秒", i_day, i_hour, i_minutes, i_second));
               Global.DOProcessTag = 0;
            }
            else
            {
                Global.form.AddMessage(string.Format("活動已經開始{0}天{1}小時{2}分{3}秒", 0-i_day, 0-i_hour, 0-i_minutes, 0-i_second));
                ts = TimeSpan.MinValue;
            }
            return ts;
        }
        
        private void StartBeingTimer()
        {
            TimeSpan ts = SetBeginTimeSpan();
            if(!ts.Equals(TimeSpan.MinValue))
                timerBegin = new Timer(BeginTimerDo, null, ts, TimeSpan.Zero);
        }
        
        /// <summary>
        /// 到達活動開始時間時，需要處理的內容
        /// </summary>
        /// <param name="state"></param>
        private void BeginTimerDo(object state)
        {
            Global.form.AddMessage("活動正式開始");
            Global.DOProcessTag = 1;
        }
        
        /// <summary>
        /// 設定結束時間
        /// </summary>
        /// <returns></returns>
        private TimeSpan  SetEndTimeSpan()
        {
            DateTime t_now = DateTime.Now;
            DateTime t_end = DateTime.Parse(Global.EndTime);
            TimeSpan ts = t_end.Subtract(t_now);
            int i_day = ts.Days;
            int i_hour = ts.Hours;
            int i_minutes = ts.Minutes;
            int i_second = ts.Seconds;
            if (i_day >= 0 && i_hour >= 0 && i_minutes >= 0 && i_second >= 0)
            {
                Global.form.AddMessage(string.Format("離活動結束還有{0}天{1}小時{2}分{3}秒", i_day, i_hour, i_minutes, i_second));
            }
            else
            {
                Global.form.AddMessage(string.Format("活動已經結束{0}天{1}小時{2}分{3}秒", 0 - i_day, 0 - i_hour, 0 - i_minutes, 0 - i_second));
                ts = TimeSpan.MinValue;
            }
            return ts;
        }
        
        /// <summary>
        /// 到達活動結束時間后的處理動作
        /// </summary>
        /// <param name="state"></param>
        private void EndTimerDo(object state)
        {
            Global.form.AddMessage("活動已經結束");
            Global.DOProcessTag = 2;
        }

        /// <summary>
        /// 設定結束時間Timer
        /// </summary>
        private void StartEndTimer()
        {
            TimeSpan ts = SetEndTimeSpan();
            if (!ts.Equals(TimeSpan.MinValue))
                timerEnd = new Timer(EndTimerDo, null, ts, TimeSpan.Zero);
        }

        /// <summary>
        /// 設定結束時間
        /// </summary>
        /// <returns></returns>
        private TimeSpan SetWarnTimeSpan()
        {
            DateTime t_now = DateTime.Now;
            DateTime t_end = DateTime.Parse(Global.WarnTime);
            TimeSpan ts = t_end.Subtract(t_now);
            int i_day = ts.Days;
            int i_hour = ts.Hours;
            int i_minutes = ts.Minutes;
            int i_second = ts.Seconds;
            if (i_day >= 0 && i_hour >= 0 && i_minutes >= 0 && i_second >= 0)
            {
                Global.form.AddMessage(string.Format("離預警處理還有{0}天{1}小時{2}分{3}秒", i_day, i_hour, i_minutes, i_second));
            }
            else
            {
                Global.form.AddMessage(string.Format("預警處理已經結束{0}天{1}小時{2}分{3}秒", 0 - i_day, 0 - i_hour, 0 - i_minutes, 0 - i_second));
                ts = TimeSpan.MinValue;
            }
            return ts;
        }

        /// <summary>
        /// 到預警時間后的處理動作
        /// </summary>
        /// <param name="state"></param>
        private void WarnTimerDo(object state)
        {
            Global.form.AddMessage("預警處理線程啟動");
            Global g = new Global();
            g.WarnDo();
        }

        /// <summary>
        /// 設定結束時間Timer
        /// </summary>
        private void StartWarnTimer()
        {
            TimeSpan ts = SetWarnTimeSpan();
            if (!ts.Equals(TimeSpan.MinValue))
                timerWarn = new Timer(WarnTimerDo, null, ts, TimeSpan.Zero);
        }
        
        
        /// <summary>
        /// 啟動系統所有的Timer
        /// </summary>
        public void StartAllTimer()
        {
            StartBeingTimer();
            StartWarnTimer();
            StartEndTimer();
        }
        
    }
}