// 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;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Editor.Xaml.Features.OrganizeImports;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.RemoveUnnecessaryImports;
 
namespace Microsoft.CodeAnalysis.Editor.Xaml.OrganizeImports
{
    [ExportLanguageService(typeof(IRemoveUnnecessaryImportsService), StringConstants.XamlLanguageName), Shared]
    internal class XamlRemoveUnnecessaryImportsService : IRemoveUnnecessaryImportsService
    {
        private readonly IXamlRemoveUnnecessaryNamespacesService _removeService;
 
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public XamlRemoveUnnecessaryImportsService(IXamlRemoveUnnecessaryNamespacesService removeService)
        {
            _removeService = removeService;
        }
 
        public Task<Document> RemoveUnnecessaryImportsAsync(Document document, CancellationToken cancellationToken)
            => RemoveUnnecessaryImportsAsync(document, predicate: null, cancellationToken: cancellationToken);
 
        public Task<Document> RemoveUnnecessaryImportsAsync(
            Document document, Func<SyntaxNode, bool>? predicate, CancellationToken cancellationToken)
        {
            return _removeService.RemoveUnnecessaryNamespacesAsync(document, cancellationToken) ?? Task.FromResult(document);
        }
    }
}