// 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.Collections.ObjectModel;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;

using ICSharpCode.Decompiler;
using ICSharpCode.Decompiler.CSharp.ProjectDecompiler;
using ICSharpCode.Decompiler.Metadata;
using ICSharpCode.Decompiler.Util;
using ICSharpCode.ILSpy.Controls;
using ICSharpCode.ILSpy.Properties;
using ICSharpCode.ILSpy.TextView;
using ICSharpCode.ILSpy.ViewModels;

using Microsoft.Win32;

namespace ICSharpCode.ILSpy.TreeNodes
{
	[Export(typeof(IResourceNodeFactory))]
	sealed class ResourcesFileTreeNodeFactory : IResourceNodeFactory
	{
		public ILSpyTreeNode CreateNode(Resource resource)
		{
			if (resource.Name.EndsWith(".resources", StringComparison.OrdinalIgnoreCase))
			{
				return new ResourcesFileTreeNode(resource);
			}
			return null;
		}

		public ILSpyTreeNode CreateNode(string key, object data)
		{
			return null;
		}
	}

	sealed class ResourcesFileTreeNode : ResourceTreeNode
	{
		readonly ICollection<KeyValuePair<string, string>> stringTableEntries = new ObservableCollection<KeyValuePair<string, string>>();
		readonly ICollection<SerializedObjectRepresentation> otherEntries = new ObservableCollection<SerializedObjectRepresentation>();

		public ResourcesFileTreeNode(Resource er)
			: base(er)
		{
			this.LazyLoading = true;
		}

		public override object Icon => Images.ResourceResourcesFile;

		protected override void LoadChildren()
		{
			Stream s = Resource.TryOpenStream();
			if (s == null)
				return;
			s.Position = 0;
			try
			{
				foreach (var entry in new ResourcesFile(s).OrderBy(e => e.Key, NaturalStringComparer.Instance))
				{
					ProcessResourceEntry(entry);
				}
			}
			catch (BadImageFormatException)
			{
				// ignore errors
			}
			catch (EndOfStreamException)
			{
				// ignore errors
			}
		}

		private void ProcessResourceEntry(KeyValuePair<string, object> entry)
		{
			if (entry.Value is string)
			{
				stringTableEntries.Add(new KeyValuePair<string, string>(entry.Key, (string)entry.Value));
				return;
			}

			if (entry.Value is byte[])
			{
				Children.Add(ResourceEntryNode.Create(entry.Key, (byte[])entry.Value));
				return;
			}

			if (entry.Value is MemoryStream ms)
			{
				Children.Add(ResourceEntryNode.Create(entry.Key, ms.ToArray()));
				return;
			}

			if (entry.Value == null)
			{
				otherEntries.Add(new SerializedObjectRepresentation(entry.Key, "null", ""));
			}
			else if (entry.Value is ResourceSerializedObject so)
			{
				otherEntries.Add(new SerializedObjectRepresentation(entry.Key, so.TypeName, "<serialized>"));
			}
			else
			{
				otherEntries.Add(new SerializedObjectRepresentation(entry.Key, entry.Value.GetType().FullName, entry.Value.ToString()));
			}
		}

		public override bool Save(TabPageModel tabPage)
		{
			Stream s = Resource.TryOpenStream();
			if (s == null)
				return false;
			SaveFileDialog dlg = new SaveFileDialog();
			dlg.FileName = Path.GetFileName(WholeProjectDecompiler.SanitizeFileName(Resource.Name));
			dlg.Filter = Resources.ResourcesFileFilter;
			if (dlg.ShowDialog() == true)
			{
				s.Position = 0;
				switch (dlg.FilterIndex)
				{
					case 1:
						using (var fs = dlg.OpenFile())
						{
							s.CopyTo(fs);
						}
						break;
					case 2:
						try
						{
							using (var fs = dlg.OpenFile())
							using (var writer = new ResXResourceWriter(fs))
							{
								foreach (var entry in new ResourcesFile(s))
								{
									writer.AddResource(entry.Key, entry.Value);
								}
							}
						}
						catch (BadImageFormatException)
						{
							// ignore errors
						}
						catch (EndOfStreamException)
						{
							// ignore errors
						}
						break;
				}
			}

			return true;
		}

		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
		{
			EnsureLazyChildren();
			base.Decompile(language, output, options);
			var textView = (DecompilerTextView)Docking.DockWorkspace.Instance.ActiveTabPage.Content;
			if (stringTableEntries.Count != 0)
			{
				ISmartTextOutput smartOutput = output as ISmartTextOutput;
				if (null != smartOutput)
				{
					smartOutput.AddUIElement(
						delegate {
							return new ResourceStringTable(stringTableEntries, textView);
						}
					);
				}
				output.WriteLine();
				output.WriteLine();
			}
			if (otherEntries.Count != 0)
			{
				ISmartTextOutput smartOutput = output as ISmartTextOutput;
				if (null != smartOutput)
				{
					smartOutput.AddUIElement(
						delegate {
							return new ResourceObjectTable(otherEntries, textView);
						}
					);
				}
				output.WriteLine();
			}
		}

		internal class SerializedObjectRepresentation
		{
			public SerializedObjectRepresentation(string key, string type, string value)
			{
				this.Key = key;
				this.Type = type;
				this.Value = value;
			}

			public string Key { get; private set; }
			public string Type { get; private set; }
			public string Value { get; private set; }
		}
	}
}
