waitc class

  public class WaitC
  {
    int m_hour, m_minute;
    int m_waitMilliSeconds = 0;

    public string TargetDailyTime {
      get {
        return $"{m_hour.ToString("00")}{m_minute.ToString("00")}";
      }
      set {
        /*it will be a tring like 1030, 10 is hours, 30 is minutes,
         this should always be in 24hrs format.*/

        string s = value;
        if (s.Length != 4)
          throw new Exception("dude why is the passed string not a 4 length string with 24hr format???");

        m_hour = int.Parse(s.Substring(0, 2));
        m_minute = int.Parse(s.Substring(2));
        
      }
    }
    public static void Start(string everydayTime, string logmsg, Action act)
    {
      WaitC c = new WaitC();
      c.TargetDailyTime = everydayTime;
      new Thread(() => {
        while (true)
        {
          code.UIProc($"{logmsg} {c.TimeLeftString()}", null);
          c.WaitTillNextTime();
          try
          {
            act();
          }
          catch (Exception exp)
          {
            code.UIProc($"exception in waitc: logmsg '{logmsg}' >> {exp.ToString()}", null);

            
          }
          

        }
      }) { IsBackground = true }.Start();


    }
    DateTime getNextTime(bool nextday)
    {
      var dn = DateTime.Now;
      if (nextday)
        dn = dn.AddDays(1);

      var dtimestart = new DateTime(dn.Year, dn.Month, dn.Day, m_hour, m_minute, 0);

      return dtimestart;

    }

    public TimeSpan getTimeToWait()
    {
      // start time to be something
      var dn = DateTime.Now;
      var dtimestart = new DateTime(dn.Year, dn.Month, dn.Day, m_hour, m_minute, 0);
      DateTime nextTime;
      if (dn > dtimestart)
      {
        // we need to start a timer till next day
        nextTime = getNextTime(true);
      }
      else
      {
        nextTime = getNextTime(false);
      }

      var ts = (nextTime - DateTime.Now);
      var sleepSeconds = ts.TotalSeconds;
      m_waitMilliSeconds = (int)(sleepSeconds * 1000.0);

      return ts;


    }
    public void WaitTillNextTime()
    {
      /*getTimeToWait() calculates when next the event is supposed to occur. */
      getTimeToWait();
      Thread.Sleep(m_waitMilliSeconds);

    }

    public string TimeLeftString()
    {
      var ts = getTimeToWait();
      return $"{ts.Hours} hours, {ts.Minutes} minutes";

    }
  }