// 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;
using System.Composition;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.Text;
 
namespace Microsoft.CodeAnalysis.CodeRefactorings;
 
#pragma warning disable RS0034 // Exported parts should be marked with 'ImportingConstructorAttribute'
[ExportCodeRefactoringProvider(
    LanguageNames.CSharp,
    DocumentKinds = [nameof(TextDocumentKind.AdditionalDocument), nameof(TextDocumentKind.AnalyzerConfigDocument)],
    DocumentExtensions = [".txt", ".editorconfig"])]
[Shared]
public sealed class NonSourceFileRefactoring : CodeRefactoringProvider
{
    public override Task ComputeRefactoringsAsync(CodeRefactoringContext context)
    {
        context.RegisterRefactoring(CodeAction.Create(nameof(NonSourceFileRefactoring),
            createChangedSolution: async ct =>
            {
                var document = context.TextDocument;
                var text = await document.GetTextAsync(ct).ConfigureAwait(false);
                var newText = SourceText.From(text.ToString() + Environment.NewLine + "# Refactored");
                if (document is AdditionalDocument)
                    return document.Project.Solution.WithAdditionalDocumentText(document.Id, newText);
                return document.Project.Solution.WithAnalyzerConfigDocumentText(document.Id, newText);
            }));
 
        return Task.CompletedTask;
    }
}