using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;

using CamBooth.App.Core.AppSettings;
using CamBooth.App.Core.Logging;
using CamBooth.App.Features.Camera;

using EOSDigital.API;

namespace CamBooth.App.Features.LiveView;

public partial class LiveViewPage : Page
{
	private readonly AppSettingsService _appSettings;

	private readonly CameraService _cameraService;

	private readonly Logger _logger;

	private readonly ImageBrush bgbrush = new();

	private readonly Action<BitmapImage> SetImageAction;


	public LiveViewPage(Logger logger, AppSettingsService appSettings, CameraService cameraService)
	{
		this._logger = logger;
		this._appSettings = appSettings;
		this._cameraService = cameraService;
		this.InitializeComponent();
		this.SetImageAction = img => { this.bgbrush.ImageSource = img; };
		
		// Mirror the LiveView image horizontally
		ScaleTransform scaleTransform = new ScaleTransform(-1, 1, 0.5, 0.5);
		this.bgbrush.Transform = scaleTransform;
		
		this.LVCanvas.Background = this.bgbrush;
		cameraService.ConnectCamera();
		cameraService._mainCamera.LiveViewUpdated += this.MainCamera_OnLiveViewUpdated;
	}


	private void MainCamera_OnLiveViewUpdated(ICamera sender, Stream img)
	{
		try
		{
			using WrapStream s = new(img);
			img.Position = 0;
			BitmapImage EvfImage = new();
			EvfImage.BeginInit();
			EvfImage.StreamSource = s;
			EvfImage.CacheOption = BitmapCacheOption.OnLoad;
			EvfImage.EndInit();
			EvfImage.Freeze();
			Application.Current.Dispatcher.BeginInvoke(this.SetImageAction, EvfImage);
		}
		catch (Exception ex)
		{
			this._logger.Error(ex.Message);
		}
	}
	
	public void Dispose()
	{
		this._cameraService.Dispose();
	}
}