// 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.Collections.Immutable;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeFixes;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Editing;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Shared.Extensions;
 
namespace Microsoft.CodeAnalysis.RemoveUnnecessarySuppressions;
 
[ExportCodeFixProvider(LanguageNames.CSharp, LanguageNames.VisualBasic, Name = PredefinedCodeFixProviderNames.RemoveUnnecessaryAttributeSuppressions), Shared]
[method: ImportingConstructor]
[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
internal sealed class RemoveUnnecessaryAttributeSuppressionsCodeFixProvider() : SyntaxEditorBasedCodeFixProvider
{
    public override ImmutableArray<string> FixableDiagnosticIds
        => [IDEDiagnosticIds.InvalidSuppressMessageAttributeDiagnosticId];
 
    public override async Task RegisterCodeFixesAsync(CodeFixContext context)
    {
        var root = await context.Document.GetRequiredSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
        foreach (var diagnostic in context.Diagnostics)
        {
            // Register code fix with a defensive check
            if (root.FindNode(diagnostic.Location.SourceSpan) != null)
            {
                RegisterCodeFix(context, AnalyzersResources.Remove_unnecessary_suppression, nameof(AnalyzersResources.Remove_unnecessary_suppression));
            }
        }
    }
 
    protected override Task FixAllAsync(Document document, ImmutableArray<Diagnostic> diagnostics, SyntaxEditor editor, CancellationToken cancellationToken)
    {
        foreach (var diagnostic in diagnostics)
        {
            var node = editor.OriginalRoot.FindNode(diagnostic.Location.SourceSpan);
            editor.RemoveNode(node);
        }
 
        return Task.CompletedTask;
    }
}