// 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;
using System.Resources;
using System.Resources.Tools;
using System.IO;

using ICSharpCode.Core;
using ICSharpCode.SharpDevelop;
using ICSharpCode.SharpDevelop.Dom;
using ICSharpCode.SharpDevelop.Project;

namespace ResourceEditor
{
	public class ResourceCodeGeneratorTool : ICustomTool
	{
		protected bool createInternalClass = true;
		
		public void GenerateCode(FileProjectItem item, CustomToolContext context)
		{
			/*context.GenerateCodeDomAsync(item, context.GetOutputFileName(item, ".Designer"),
			                             delegate {
			                             	return GenerateCodeDom();
			                             });*/
			string inputFilePath = item.FileName;
			
			// Ensure that the generated code will not conflict with an
			// existing class.
			if (context.Project != null) {
				IProjectContent pc = ParserService.GetProjectContent(context.Project);
				if (pc != null) {
					IClass existingClass = pc.GetClass(context.OutputNamespace + "." + StronglyTypedResourceBuilder.VerifyResourceName(Path.GetFileNameWithoutExtension(inputFilePath), pc.Language.CodeDomProvider), 0);
					if (existingClass != null) {
						if (!IsGeneratedResourceClass(existingClass)) {
							context.MessageView.AppendLine(String.Format(System.Globalization.CultureInfo.CurrentCulture, ResourceService.GetString("ResourceEditor.ResourceCodeGeneratorTool.ClassConflict"), inputFilePath, existingClass.FullyQualifiedName));
							return;
						}
					}
				}
			}
			
			IResourceReader reader;
			if (string.Equals(Path.GetExtension(inputFilePath), ".resx", StringComparison.OrdinalIgnoreCase)) {
				reader = new ResXResourceReader(inputFilePath);
				((ResXResourceReader)reader).BasePath = Path.GetDirectoryName(inputFilePath);
			} else {
				reader = new ResourceReader(inputFilePath);
			}
			
			Hashtable resources = new Hashtable();
			foreach (DictionaryEntry de in reader) {
				resources.Add(de.Key, de.Value);
			}
			
			string[] unmatchable = null;
			
			string generatedCodeNamespace = context.OutputNamespace;
			if (context.Project.LanguageProperties == ICSharpCode.SharpDevelop.Dom.LanguageProperties.VBNet) {
				if (generatedCodeNamespace == context.Project.RootNamespace) {
					generatedCodeNamespace = null; // namespace is implicit in VB
				} else if (generatedCodeNamespace.StartsWith(context.Project.RootNamespace + ".", StringComparison.OrdinalIgnoreCase)) {
					generatedCodeNamespace = generatedCodeNamespace.Substring(context.Project.RootNamespace.Length + 1);
				}
			}
			
			context.WriteCodeDomToFile(
				item,
				context.GetOutputFileName(item, ".Designer"),
				StronglyTypedResourceBuilder.Create(
					resources,        // resourceList
					Path.GetFileNameWithoutExtension(inputFilePath), // baseName
					generatedCodeNamespace, // generatedCodeNamespace
					context.OutputNamespace, // resourcesNamespace
					context.Project.LanguageProperties.CodeDomProvider, // codeProvider
					createInternalClass,             // internal class
					out unmatchable
				));
			
			foreach (string s in unmatchable) {
				context.MessageView.AppendLine(String.Format(System.Globalization.CultureInfo.CurrentCulture, ResourceService.GetString("ResourceEditor.ResourceCodeGeneratorTool.CouldNotGenerateResourceProperty"), s));
			}
		}
		
		/// <summary>
		/// Determines whether the specified class is a generated resource
		/// class, based on the attached attributes.
		/// </summary>
		static bool IsGeneratedResourceClass(IClass @class)
		{
			IClass generatedCodeAttributeClass = @class.ProjectContent.GetClass("System.CodeDom.Compiler.GeneratedCodeAttribute", 0);
			if (generatedCodeAttributeClass == null) {
				LoggingService.Info("Could not find the class for 'System.CodeDom.Compiler.GeneratedCodeAttribute'.");
				return false;
			}
			IReturnType generatedCodeAttribute = generatedCodeAttributeClass.DefaultReturnType;
			
			foreach (IAttribute att in @class.Attributes) {
				if (att.AttributeType.Equals(generatedCodeAttribute) &&
				    att.PositionalArguments.Count == 2 &&
				    String.Equals("System.Resources.Tools.StronglyTypedResourceBuilder", att.PositionalArguments[0] as string, StringComparison.Ordinal)) {
					return true;
				}
			}
			return false;
		}
	}
	
	public class PublicResourceCodeGeneratorTool : ResourceCodeGeneratorTool
	{
		public PublicResourceCodeGeneratorTool()
		{
			base.createInternalClass = false;
		}
	}
}