// 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 System.Composition;
using System.Diagnostics.CodeAnalysis;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeCleanup;
using Microsoft.CodeAnalysis.CodeRefactorings;
using Microsoft.CodeAnalysis.Shared.Extensions;
 
namespace Microsoft.CodeAnalysis.ChangeSignature
{
    [ExportCodeRefactoringProvider(LanguageNames.CSharp, LanguageNames.VisualBasic,
        Name = PredefinedCodeRefactoringProviderNames.ChangeSignature), Shared]
    internal class ChangeSignatureCodeRefactoringProvider : CodeRefactoringProvider
    {
        [ImportingConstructor]
        [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
        public ChangeSignatureCodeRefactoringProvider()
        {
        }
 
        public sealed override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
        {
            var (document, span, cancellationToken) = context;
            if (span.IsEmpty)
            {
                var service = document.GetLanguageService<AbstractChangeSignatureService>();
                var actions = await service.GetChangeSignatureCodeActionAsync(document, span, context.Options, cancellationToken).ConfigureAwait(false);
                context.RegisterRefactorings(actions);
            }
        }
    }
}