// 
// RedundantCommaInArrayInitializerIssue.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 ICSharpCode.NRefactory.Refactoring;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	[IssueDescription ("Redundant comma in array initializer",
						Description = "Redundant comma in array initializer.",
						Category = IssueCategories.Redundancies,
						Severity = Severity.Warning,
						IssueMarker = IssueMarker.GrayOut,
                        ResharperDisableKeyword = "RedundantCommaInArrayInitializer")]
	public class RedundantCommaInArrayInitializerIssue : ICodeIssueProvider
	{
		public IEnumerable<CodeIssue> GetIssues (BaseRefactoringContext context)
		{
			return new GatherVisitor (context).GetIssues ();
		}

		class GatherVisitor : GatherVisitorBase<RedundantCommaInArrayInitializerIssue>
		{
			public GatherVisitor (BaseRefactoringContext ctx)
				: base (ctx)
			{
			}

			public override void VisitArrayInitializerExpression (ArrayInitializerExpression arrayInitializerExpression)
			{
				base.VisitArrayInitializerExpression (arrayInitializerExpression);

				if (arrayInitializerExpression.IsSingleElement)
					return;

				var commaToken = arrayInitializerExpression.RBraceToken.PrevSibling as CSharpTokenNode;
				if (commaToken == null || commaToken.ToString () != ",")
					return;
				string initializerType;
				if (arrayInitializerExpression.Parent is ObjectCreateExpression) {
					if (arrayInitializerExpression.Elements.FirstOrNullObject () is NamedExpression) {
                        initializerType = ctx.TranslateString("Remove redundant comma in object initializer");
					} else {
                        initializerType = ctx.TranslateString("Remove redundant comma in collection initializer");
					}
				} else {
                    initializerType = ctx.TranslateString("Remove redundant comma in array initializer");
				}
				AddIssue (commaToken,
                    initializerType,
					script => script.Remove (commaToken));
			}
		}
	}
}
