// 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.

#nullable disable

using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace Microsoft.CodeAnalysis.CSharp.ReplacePropertyWithMethods;

internal sealed partial class CSharpReplacePropertyWithMethodsService
{
    private sealed class ConvertValueToReturnsRewriter : CSharpSyntaxRewriter
    {
        public static readonly CSharpSyntaxRewriter Instance = new ConvertValueToReturnsRewriter();

        private ConvertValueToReturnsRewriter()
        {
        }

        private static XmlNameSyntax ConvertToReturns(XmlNameSyntax name)
            => name.ReplaceToken(name.LocalName, SyntaxFactory.Identifier("returns"));

        public override SyntaxNode VisitXmlElementStartTag(XmlElementStartTagSyntax node)
            => IsValueName(node.Name)
                ? node.ReplaceNode(node.Name, ConvertToReturns(node.Name))
                : base.VisitXmlElementStartTag(node);

        public override SyntaxNode VisitXmlElementEndTag(XmlElementEndTagSyntax node)
            => IsValueName(node.Name)
                ? node.ReplaceNode(node.Name, ConvertToReturns(node.Name))
                : base.VisitXmlElementEndTag(node);
    }
}