// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Controls;

using ILSpy.Debugger.Models.TreeModel;

namespace Debugger.AddIn.Tooltips
{
	/// <summary>
	/// Control displaying and executing <see cref="IVisualizerCommand">visualizer commands</see>.
	/// </summary>
	public class VisualizerPicker : ComboBox
	{
		public VisualizerPicker()
		{
			this.SelectionChanged += VisualizerPicker_SelectionChanged;
		}

		void VisualizerPicker_SelectionChanged(object sender, SelectionChangedEventArgs e)
		{
			if (this.SelectedItem == null) {
				return;
			}
			var clickedCommand = this.SelectedItem as IVisualizerCommand;
			if (clickedCommand == null) {
				throw new InvalidOperationException(
					string.Format("{0} clicked, only instances of {1} must be present in {2}.",
								  this.SelectedItem.GetType().ToString(), typeof(IVisualizerCommand).Name, typeof(VisualizerPicker).Name));
			}

			clickedCommand.Execute();
			// Make no item selected, so that multiple selections of the same item always execute the command.
			// This triggers VisualizerPicker_SelectionChanged again, which returns immediately.
			this.SelectedIndex = -1;
		}

		public new IEnumerable<IVisualizerCommand> ItemsSource
		{
			get { return (IEnumerable<IVisualizerCommand>)base.ItemsSource; }
			set { base.ItemsSource = value; }
		}
	}
}