//// 
//// ReferenceFinder.cs
////  
//// Author:
////       Mike Krüger <mkrueger@novell.com>
//// 
//// Copyright (c) 2011 Novell, Inc (http://www.novell.com)
//// 
//// 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 Mono.Addins;
//using MonoDevelop.Core;
//using MonoDevelop.Projects;
//using ICSharpCode.NRefactory.TypeSystem;
//using MonoDevelop.Ide.TypeSystem;
//using System.Threading.Tasks;
//
//namespace MonoDevelop.Ide.FindInFiles
//{
//	public abstract class ReferenceFinder
//	{
//		public bool IncludeDocumentation {
//			get;
//			set;
//		}
//		
//		/*
//		Project project;
//		protected Project Project {
//			get {
//				if (project == null)
//					project = Content.GetProject ();
//				return project;
//			}
//		}*/
//		
//		static List<ReferenceFinderCodon> referenceFinderCodons = new List<ReferenceFinderCodon> ();
//		
//		static ReferenceFinder ()
//		{
//			AddinManager.AddExtensionNodeHandler ("/MonoDevelop/Ide/ReferenceFinder", delegate(object sender, ExtensionNodeEventArgs args) {
//				var codon = (ReferenceFinderCodon)args.ExtensionNode;
//				switch (args.Change) {
//				case ExtensionChange.Add:
//					referenceFinderCodons.Add (codon);
//					break;
//				case ExtensionChange.Remove:
//					referenceFinderCodons.Remove (codon);
//					break;
//				}
//			});
//		}
//		
//		static ReferenceFinder GetReferenceFinder (string mimeType)
//		{
//			var codon = referenceFinderCodons.FirstOrDefault (c => c.SupportedMimeTypes.Any (mt => mt == mimeType));
//			return codon != null ? codon.CreateFinder () : null;
//		}
//		
//		public static IEnumerable<MemberReference> FindReferences (object member, bool searchForAllOverloads, IProgressMonitor monitor = null)
//		{
//			return FindReferences (IdeApp.ProjectOperations.CurrentSelectedSolution, member, searchForAllOverloads, RefactoryScope.Unknown, monitor);
//		}
//
//		public static IEnumerable<MemberReference> FindReferences (object member, bool searchForAllOverloads, RefactoryScope scope, IProgressMonitor monitor = null)
//		{
//			return FindReferences (IdeApp.ProjectOperations.CurrentSelectedSolution, member, searchForAllOverloads, scope, monitor);
//		}
//		
//		static SearchCollector.FileList GetFileList (string fileName)
//		{
//			var doc = IdeApp.Workbench.GetDocument (fileName);
//			if (doc != null)
//				return new SearchCollector.FileList (doc.Project, null, new [] { (FilePath)fileName });
//			return null;
//		}
//
//		static IEnumerable<SearchCollector.FileList> GetFileNames (Solution solution, object node, RefactoryScope scope, 
//		                                                           IProgressMonitor monitor, IEnumerable<object> searchNodes)
//		{
//			if (!(node is IField) && !(node is IParameter) && node is IVariable || scope == RefactoryScope.File) {
//				string fileName;
//				if (node is IEntity) {
//					fileName = ((IEntity)node).Region.FileName;
//				} else if (node is ITypeParameter) {
//					fileName = ((ITypeParameter)node).Region.FileName;
//				} else {
//					fileName = ((IVariable)node).Region.FileName;
//				}
//				var fileList =  GetFileList (fileName);
//				if (fileList != null)
//					yield return fileList;
//				yield break;
//			}
//			
//			if (node is ITypeParameter) {
//				var typeParameter = node as ITypeParameter;
//				if (typeParameter.Owner != null) {
//					yield return SearchCollector.CollectDeclaringFiles (typeParameter.Owner);
//					yield break;
//				}
//				var fileList =  GetFileList (typeParameter.Region.FileName);
//				if (fileList != null)
//					yield return fileList;
//				yield break;
//			}
//			var par = node as IParameter;
//			if (par != null) {
//				node = par.Owner;
//			}
//
//			var compilationProvider = (ICompilationProvider)node;
//			switch (scope) {
//			case RefactoryScope.DeclaringType:
//				var entity = (IEntity)compilationProvider;
//				if (entity.DeclaringTypeDefinition != null)
//					yield return SearchCollector.CollectDeclaringFiles (entity.DeclaringTypeDefinition);
//				else
//					yield return SearchCollector.CollectDeclaringFiles (entity);
//				break;
//			case RefactoryScope.Project:
//				var sourceProject = TypeSystemService.GetProject (compilationProvider.Compilation.MainAssembly.UnresolvedAssembly.Location);
//				foreach (var file in SearchCollector.CollectFiles (sourceProject, searchNodes))
//					yield return file;
//				break;
//			default:
//				var files = SearchCollector.CollectFiles (solution, searchNodes).ToList ();
//				if (monitor != null)
//					monitor.BeginTask (GettextCatalog.GetString ("Searching for references in solution..."), files.Count);
//				foreach (var file in files) {
//					if (monitor != null && monitor.IsCancelRequested)
//						yield break;
//					yield return file;
//					if (monitor != null)
//						monitor.Step (1);
//				}
//				if (monitor != null)
//					monitor.EndTask ();
//				break;
//			}
//		}
//		
//		public static List<Project> GetAllReferencingProjects (Solution solution, Project sourceProject)
//		{
//			var projects = new List<Project> ();
//			projects.Add (sourceProject);
//			foreach (var project in solution.GetAllProjects ()) {
//				if (project.GetReferencedItems (ConfigurationSelector.Default).Any (prj => prj == sourceProject))
//					projects.Add (project);
//			}
//			return projects;
//		}
//
//		public static IEnumerable<MemberReference> FindReferences (Solution solution, object member, bool searchForAllOverloads, RefactoryScope scope = RefactoryScope.Unknown, IProgressMonitor monitor = null)
//		{
//			yield break;
//
////			if (member == null)
////				yield break;
////			if (solution == null && member is IEntity) {
////				var project = TypeSystemService.GetProject ((member as IEntity).Compilation.MainAssembly.UnresolvedAssembly.Location);
////				if (project == null)
////					yield break;
////				solution = project.ParentSolution;
////			}
////			
////			IList<object> searchNodes = new [] { member };
////			if (member is ITypeParameter) {
////				// nothing
////			} else if (member is IType) {
////				searchNodes = CollectMembers ((IType)member).ToList<object> ();
////			} else if (member is IEntity) {
////				var e = (IEntity)member;
////				if (e.SymbolKind == SymbolKind.Destructor) {
////					foreach (var r in FindReferences (solution, e.DeclaringType, searchForAllOverloads, scope, monitor)) {
////						yield return r;
////					}
////					yield break;
////				}
////				if (member is IMember)
////					searchNodes = CollectMembers (solution, (IMember)member, scope, searchForAllOverloads).ToList<object> ();
////			}
////			// prepare references finder
////			var preparedFinders = new List<Tuple<ReferenceFinder, Project, IProjectContent, List<FilePath>>> ();
////			var curList = new List<FilePath> ();
////			int totalFiles = 0;
////			foreach (var info in GetFileNames (solution, member, scope, monitor, searchNodes)) {
////				string oldMime = null;
////				foreach (var file in info.Files) {
////					if (monitor != null && monitor.IsCancelRequested)
////						yield break;
////					
////					string mime = DesktopService.GetMimeTypeForUri (file);
////					if (mime != oldMime) {
////						var finder = GetReferenceFinder (mime);
////						if (finder == null)
////							continue;
////						
////						oldMime = mime;
////						
////						curList = new List<FilePath> ();
////						preparedFinders.Add (Tuple.Create (finder, info.Project, info.Content, curList));
////					}
////					curList.Add (file);
////					totalFiles++;
////				}
////			}
////			
////			// execute search
////			if (monitor != null)
////				monitor.BeginTask (GettextCatalog.GetString ("Analyzing files..."), totalFiles);
////			var foundOccurrences = new HashSet<Tuple<string, DomRegion>> ();
////			foreach (var tuple in preparedFinders) {
////				var finder = tuple.Item1;
////				foreach (var foundReference in finder.FindReferences (tuple.Item2, tuple.Item3, tuple.Item4, monitor, searchNodes)) {
////					if (monitor != null && monitor.IsCancelRequested)
////						yield break;
////					var tag = Tuple.Create (foundReference.FileName, foundReference.Region);
////					if (foundOccurrences.Contains (tag))
////						continue;
////					foundOccurrences.Add (tag);
////					yield return foundReference;
////				}
////			}
////			if (monitor != null)
////				monitor.EndTask ();
//		}
//
//		public abstract IEnumerable<MemberReference> FindReferences (Project project, IProjectContent content, IEnumerable<FilePath> files, IProgressMonitor monitor, IEnumerable<object> searchedMembers);
//
//		internal static IEnumerable<IMember> CollectMembers (Solution solution, IMember member, RefactoryScope scope, bool includeOverloads = true)
//		{
//			return MemberCollector.CollectMembers (solution, member, scope, includeOverloads);
//		}
//		
//		internal static IEnumerable<IEntity> CollectMembers (IType type)
//		{
//			var typeDefinition = type.GetDefinition ();
//			if (typeDefinition == null)
//				yield break;
//			yield return (IEntity)typeDefinition;
//			foreach (var c in typeDefinition.GetMembers (m => m.SymbolKind == SymbolKind.Constructor, GetMemberOptions.IgnoreInheritedMembers)) {
//				if (!c.IsSynthetic)
//					yield return c;
//			}
//
//			foreach (var m in type.GetMethods (m  => m.IsDestructor, GetMemberOptions.IgnoreInheritedMembers)) {
//				yield return m;
//			}
//		}
//
//
//		public enum RefactoryScope{ Unknown, File, DeclaringType, Solution, Project}
////		static RefactoryScope GetScope (object o)
////		{
////			IEntity node = o as IEntity;
////			if (node == null)
////				return RefactoryScope.File;
////			
////			// TODO: RefactoringsScope.Hierarchy
////			switch (node.Accessibility) {
////			case Accessibility.Public:
////			case Accessibility.Protected:
////			case Accessibility.ProtectedOrInternal:
////				if (node.DeclaringTypeDefinition != null) {
////					var scope = GetScope (node.DeclaringTypeDefinition);
////					if (scope != RefactoryScope.Solution)
////						return RefactoryScope.Project;
////				}
////				return RefactoryScope.Solution;
////			case Accessibility.Internal:
////			case Accessibility.ProtectedAndInternal:
////				return RefactoryScope.Project;
////			}
////			return RefactoryScope.DeclaringType;
////		}
//	}
//	
//	[ExtensionNode (Description="A reference finder. The specified class needs to inherit from MonoDevelop.Projects.CodeGeneration.ReferenceFinder")]
//	internal class ReferenceFinderCodon : TypeExtensionNode
//	{
//		[NodeAttribute("supportedmimetypes", "Mime types supported by this binding (to be shown in the Open File dialog)")]
//		string[] supportedMimetypes;
//		
//		public string[] SupportedMimeTypes {
//			get {
//				return supportedMimetypes;
//			}
//			set {
//				supportedMimetypes = value;
//			}
//		}
//		
//		public ReferenceFinder CreateFinder ()
//		{
//			return (ReferenceFinder)CreateInstance ();
//		}
//		
//		public override string ToString ()
//		{
//			return string.Format ("[ReferenceFinderCodon: SupportedMimeTypes={0}]", SupportedMimeTypes);
//		}
//	}
//}