using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
using Tango.ScreenCapture;

namespace WpfApp1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private ScreenCaptureEngine _capture;
        private Bitmap _currentBitmap;

        public MainWindow()
        {

            InitializeComponent();
            ContentRendered += MainWindow_ContentRendered;

            _capture = new ScreenCaptureEngine()
            {
                CaptureRegion = new CaptureRegion(0, 0, 1280, 800)
            };
            _capture.Interval = TimeSpan.FromMilliseconds(100);
            _capture.CaptureCursor = true;
            _capture.CaptureMethod = new DirectXScreenCapture();
            _capture.ScreenFrameReceived += _capture_ScreenFrameReceived;
        }

        private void MainWindow_ContentRendered(object sender, EventArgs e)
        {
            _capture.Start();
        }

        private void _capture_ScreenFrameReceived(object sender, ScreenCaptureFrameReceivedEventArgs e)
        {
            BitmapSource preview = null;

            int size = 0;

            if (e.Frame.HasDifferenceFrame)
            {
                size = e.Frame.ToDifferenceCaptureFrame().ToPng().Length;

                //using (Graphics g = Graphics.FromImage(_currentBitmap))
                //{
                //    g.DrawImage(e.Frame.ToBitmap(), new System.Drawing.Point(0, 0));
                //    ScreenCaptureFrame frame = new ScreenCaptureFrame(_currentBitmap, null);
                //    preview = frame.ToBitmapSource();
                //}
            }
            else
            {
                _currentBitmap = e.Frame.ToBitmap().Clone() as Bitmap;
                preview = e.Frame.ToBitmapSource();
                size = e.Frame.ToPng().Length;
            }

            //Debug.WriteLine($"Actual frame size on network: {size / 1000} kb");

            //Dispatcher.BeginInvoke(new Action(() =>
            //{
            //    img.Source = preview;
            //}));

            e.Frame.Dispose();
        }
    }
}