using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Threading;

namespace Tango.FirmwareUpdateLib.WPF
{
    public class ProgressDispatcher
    {
        private Dispatcher _dispatcher;
        private Window _dummyWindow; //Dummy window for the video dispatcher.
        private Thread _windowThread; //The video dispatcher thread.
        private bool _initialized;

        public void Initialize()
        {
            if (!_initialized)
            {
                _windowThread = new Thread(VideoThreadMethod);
                _windowThread.Name = "Progress Thread";
                _windowThread.SetApartmentState(ApartmentState.STA);
                _windowThread.Start();

                while (!_initialized)
                {
                    Thread.Sleep(10);
                }
            }
        }

        private void VideoThreadMethod()
        {
            _dummyWindow = new Window();
            _dummyWindow.Width = 0;
            _dummyWindow.Height = 0;
            _dummyWindow.WindowStyle = WindowStyle.None;
            _dummyWindow.ShowInTaskbar = false;
            _dummyWindow.ShowActivated = false;
            _dummyWindow.ResizeMode = ResizeMode.NoResize;
            _dummyWindow.Visibility = Visibility.Hidden;
            _dummyWindow.Opacity = 0;

            _dummyWindow.Closed += (x, y) => _dummyWindow.Dispatcher.InvokeShutdown();
            _dummyWindow.Loaded += (x, y) =>
            {
                _dummyWindow.Width = 0;
                _dummyWindow.Height = 0;
                _dummyWindow.WindowStyle = WindowStyle.None;
                _dummyWindow.ShowInTaskbar = false;
                _dummyWindow.ShowActivated = false;
                _dummyWindow.ResizeMode = ResizeMode.NoResize;
                _dummyWindow.Visibility = Visibility.Hidden;
                _dummyWindow.Opacity = 0;

                _dispatcher = _dummyWindow.Dispatcher;
                _initialized = true;
            };

            Debug.WriteLine("Progress Dispatcher Initialized!");
            _dummyWindow.Show();
            Dispatcher.Run();

        }

        public void Invoke(Action action)
        {
            _dispatcher.BeginInvoke(action);
        }

        public void Close()
        {
            _dispatcher.InvokeShutdown();
        }
    }
}