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using System;
using System.Windows;
using System.Windows.Media.Imaging;
using System.Windows.Threading;

namespace ProgramLib.GUI.View
{
   /// <summary>
   /// Interaction logic for WaitWindow.xaml
   /// </summary>
   internal partial class WaitWindow : Window
   {
      private DispatcherTimer _timer;
      private int _delayMs;
      private const int _timerTickIntervalMs = 25;
      private DateTime _startDateTime;

      public WaitWindow(string message, double delaySec)
      {
         InitializeComponent();

         Uri iconUri = new Uri($"pack://application:,,,/{GetType().Assembly.GetName().Name};component/Resources/Icons/app.ico");
         this.Icon = BitmapFrame.Create(iconUri);

         WindowStartupLocation = System.Windows.WindowStartupLocation.CenterScreen;

         tbMessage.Text = message;

         _delayMs = (int)(delaySec * 1000.0);

         _timer = new DispatcherTimer();
         _timer.Interval = TimeSpan.FromMilliseconds(_timerTickIntervalMs);
         _timer.Tick += new EventHandler(Timer_Tick);
         _timer.Start();

         _startDateTime = DateTime.Now;
      }

      private void Window_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
      {
         DragMove();
      }

      protected override void OnContentRendered(EventArgs e)
      {
         base.OnContentRendered(e);

         // Content of window may be black in case of SizeToContent is set. 
         // This eliminates the problem. 
         // Do not use InvalidateVisual because it may implicitly break your markup.
         InvalidateMeasure();
      }

      /// <summary>
      /// Show count down timer
      /// </summary>
      private void Timer_Tick(object sender, EventArgs e)
      {
         TimeSpan ts = DateTime.Now - _startDateTime;
         int remainingMs = _delayMs - (int)ts.TotalMilliseconds;
         if (remainingMs >= 0)
         {
            TimeSpan ts2 = TimeSpan.FromMilliseconds(remainingMs);
            tbCountDownTimer.Text = String.Format(@"{0:mm\:ss\.ff}", ts2);
         }
         else
         {
            _timer.Stop();
            this.Close();
         }
      }
   }
}