// 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.CodeRefactorings;
using Microsoft.CodeAnalysis.Shared.Extensions;

namespace Microsoft.CodeAnalysis.ChangeSignature;

[ExportCodeRefactoringProvider(LanguageNames.CSharp, LanguageNames.VisualBasic,
    Name = PredefinedCodeRefactoringProviderNames.ChangeSignature), Shared]
internal sealed 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, cancellationToken).ConfigureAwait(false);
            context.RegisterRefactorings(actions);
        }
    }
}