// 
// VariableHidesMemberIssue.cs
// 
// Author:
//      Mansheng Yang <lightyang0@gmail.com>
// 
// Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.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.Collections.Generic;
using System.Linq;
using ICSharpCode.NRefactory.Semantics;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	public abstract class VariableHidesMemberIssue : ICodeIssueProvider
	{
		public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
		{
			return GetGatherVisitor (context).GetIssues ();
		}

		protected static bool HidesMember(BaseRefactoringContext ctx, AstNode node, string variableName)
		{
			var typeDecl = node.GetParent<TypeDeclaration> ();
			if (typeDecl == null)
				return false;
			var typeResolveResult = ctx.Resolve (typeDecl) as TypeResolveResult;
			if (typeResolveResult == null)
				return false;

			var entityDecl = node.GetParent<EntityDeclaration> ();
			var isStatic = (entityDecl.Modifiers & Modifiers.Static) == Modifiers.Static;

			return typeResolveResult.Type.GetMembers (m => m.Name == variableName && m.IsStatic	== isStatic).Any ();
		}

		internal abstract GatherVisitorBase GetGatherVisitor (BaseRefactoringContext context);

	}
}