// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System.Collections.Generic;
using System.Composition;
using System.Diagnostics.CodeAnalysis;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.SimplifyThisOrMe;
 
namespace Microsoft.CodeAnalysis.CSharp.SimplifyThisOrMe;
 
[ExportCodeFixProvider(LanguageNames.CSharp, Name = PredefinedCodeFixProviderNames.SimplifyThisOrMe), Shared]
[ExtensionOrder(After = PredefinedCodeFixProviderNames.RemoveUnnecessaryCast)]
internal sealed partial class CSharpSimplifyThisOrMeCodeFixProvider
    : AbstractSimplifyThisOrMeCodeFixProvider<MemberAccessExpressionSyntax>
{
    [ImportingConstructor]
    [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
    public CSharpSimplifyThisOrMeCodeFixProvider()
    {
    }
 
    protected override string GetTitle()
        => CSharpFeaturesResources.Remove_this_qualification;
 
    protected override SyntaxNode Rewrite(SyntaxNode root, ISet<MemberAccessExpressionSyntax> memberAccessNodes)
        => new Rewriter(memberAccessNodes).Visit(root);
 
    private sealed class Rewriter(ISet<MemberAccessExpressionSyntax> memberAccessNodes) : CSharpSyntaxRewriter
    {
        private readonly ISet<MemberAccessExpressionSyntax> _memberAccessNodes = memberAccessNodes;
 
        public override SyntaxNode? VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
            => _memberAccessNodes.Contains(node)
                ? node.GetNameWithTriviaMoved()
                : base.VisitMemberAccessExpression(node);
    }
}