// 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.Collections.Generic;
using System.Windows.Controls;
using System.Windows.Data;
using ICSharpCode.Decompiler;
using ICSharpCode.Decompiler.Metadata;
using ICSharpCode.ILSpy.TreeNodes;
using ICSharpCode.ILSpy.ViewModels;

namespace ICSharpCode.ILSpy.Metadata
{
	class DosHeaderTreeNode : ILSpyTreeNode
	{
		private PEFile module;

		public DosHeaderTreeNode(PEFile module)
		{
			this.module = module;
		}

		public override object Text => "DOS Header";

		public override object Icon => Images.Literal;

		public override bool View(TabPageModel tabPage)
		{
			tabPage.Title = Text.ToString();
			tabPage.SupportsLanguageSwitching = false;

			var view = Helpers.PrepareDataGrid(tabPage, this);
			var reader = module.Reader.GetEntireImage().GetReader(0, 64);

			var entries = new List<Entry>();

			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_magic", "Magic Number (MZ)"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_cblp", "Bytes on last page of file"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_cp", "Pages in file"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_crlc", "Relocations"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_cparhdr", "Size of header in paragraphs"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_minalloc", "Minimum extra paragraphs needed"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_maxalloc", "Maximum extra paragraphs needed"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_ss", "Initial (relative) SS value"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_sp", "Initial SP value"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_csum", "Checksum"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_ip", "Initial IP value"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_cs", "Initial (relative) CS value"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_lfarlc", "File address of relocation table"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_ovno", "Overlay number"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res[0]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res[1]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res[2]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res[3]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_oemid", "OEM identifier (for e_oeminfo)"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_oeminfo", "OEM information; e_oemid specific"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[0]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[1]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[2]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[3]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[4]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[5]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[6]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[7]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[8]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadUInt16(), 2, "e_res2[9]", "Reserved words"));
			entries.Add(new Entry(reader.Offset, reader.ReadInt32(), 4, "e_lfanew", "File address of new exe header"));

			view.ItemsSource = entries;

			tabPage.Content = view;
			return true;
		}

		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
		{
			language.WriteCommentLine(output, "DOS Header");
		}
	}
}