// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Threading;
using ICSharpCode.Decompiler.TypeSystem;
using ICSharpCode.ILSpy.Docking;
using ICSharpCode.ILSpy.Properties;
using ICSharpCode.ILSpy.TextView;
using ICSharpCode.ILSpy.TreeNodes;

namespace ICSharpCode.ILSpy.Commands
{
	[ExportContextMenuEntry(Header = nameof(Resources.DecompileToNewPanel), InputGestureText = "MMB", Icon = "images/Search", Category = nameof(Resources.Analyze), Order = 90)]
	internal sealed class DecompileInNewViewCommand : IContextMenuEntry
	{
		public bool IsVisible(TextViewContext context)
		{
			return context.SelectedTreeNodes != null || context.Reference?.Reference is IEntity;
		}

		public bool IsEnabled(TextViewContext context)
		{
			return GetNodes(context).Any();
		}

		public void Execute(TextViewContext context)
		{
			DecompileNodes(GetNodes(context).ToArray());
		}

		IEnumerable<ILSpyTreeNode> GetNodes(TextViewContext context)
		{
			if (context.SelectedTreeNodes != null) {
				if (context.TreeView != MainWindow.Instance.AssemblyTreeView) {
					return context.SelectedTreeNodes.OfType<IMemberTreeNode>().Select(FindTreeNode).Where(n => n != null);
				} else {
					return context.SelectedTreeNodes.OfType<ILSpyTreeNode>().Where(n => n != null);
				}
			} else if (context.Reference?.Reference is IEntity entity) {
				if (MainWindow.Instance.FindTreeNode(entity) is ILSpyTreeNode node) {
					return new[] { node };
				}
			}
			return Array.Empty<ILSpyTreeNode>();

			ILSpyTreeNode FindTreeNode(IMemberTreeNode node)
			{
				if (node is ILSpyTreeNode ilspyNode)
					return ilspyNode;
				return MainWindow.Instance.FindTreeNode(node.Member);
			}
		}

		static void DecompileNodes(ILSpyTreeNode[] nodes)
		{
			if (nodes.Length == 0)
				return;

			MainWindow.Instance.SelectNodes(nodes, inNewTabPage: true);
			MainWindow.Instance.Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)MainWindow.Instance.RefreshDecompiledView);
		}
	}
}
