using OrderSupportTicket.ViewModels;
using System.Linq;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;

namespace OrderSupportTicket.Views;

public partial class TicketComposerView : UserControl
{
	public TicketComposerView() => InitializeComponent();

	private void ChatTextBox_PreviewKeyDown(object sender, KeyEventArgs e)
	{
		var isPaste = (e.Key == Key.V && Keyboard.Modifiers == ModifierKeys.Control)
				   || (e.Key == Key.Insert && Keyboard.Modifiers == ModifierKeys.Shift);
		if (!isPaste || DataContext is not OrderSupportTicketViewModel viewModel)
		{
			return;
		}

		IDataObject data;
		try
		{
			data = Clipboard.GetDataObject();
		}
		catch (ExternalException)
		{
			return;
		}

		if (data == null)
		{
			return;
		}

		if (data.GetDataPresent(DataFormats.Bitmap)
			&& data.GetData(DataFormats.Bitmap) is BitmapSource bitmap)
		{
			viewModel.AddPendingImage(bitmap);
			e.Handled = true;
			return;
		}

		if (!data.GetDataPresent(DataFormats.FileDrop)
			|| data.GetData(DataFormats.FileDrop) is not string[] files)
		{
			return;
		}

		var images = files
			.Where(path => PendingAttachmentViewModel.TryGetMimeType(System.IO.Path.GetExtension(path), out _))
			.ToArray();

		if (images.Length == 0)
		{
			return;
		}

		viewModel.AddPendingImages(images);
		e.Handled = true;
	}
}