// 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.ComponentModel.Composition;
using Microsoft.CodeAnalysis.Editor.Host;
using Microsoft.CodeAnalysis.Editor.Shared.Extensions;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.Shared.TestHooks;
using Microsoft.VisualStudio.Language.Intellisense.AsyncCompletion;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Utilities;

namespace Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.AsyncCompletion
{
    [Export(typeof(IAsyncCompletionSourceProvider))]
    [Name("Roslyn Completion Source Provider")]
    [ContentType(ContentTypeNames.RoslynContentType)]
    [method: ImportingConstructor]
    [method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    internal class CompletionSourceProvider(
        IThreadingContext threadingContext,
        IUIThreadOperationExecutor operationExecutor,
        IAsynchronousOperationListenerProvider listenerProvider,
        Lazy<IStreamingFindUsagesPresenter> streamingPresenter,
        EditorOptionsService editorOptionsService) : IAsyncCompletionSourceProvider
    {
        private readonly IThreadingContext _threadingContext = threadingContext;
        private readonly IUIThreadOperationExecutor _operationExecutor = operationExecutor;
        private readonly Lazy<IStreamingFindUsagesPresenter> _streamingPresenter = streamingPresenter;
        private readonly IAsynchronousOperationListener _listener = listenerProvider.GetListener(FeatureAttribute.CompletionSet);
        private readonly EditorOptionsService _editorOptionsService = editorOptionsService;

        public IAsyncCompletionSource? GetOrCreate(ITextView textView)
        {
            if (textView.IsInLspEditorContext())
                return null;

            return new CompletionSource(textView, _streamingPresenter, _threadingContext, _operationExecutor, _listener, _editorOptionsService);
        }
    }
}
