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

namespace Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.AsyncCompletion;

[Export(typeof(IAsyncCompletionItemManagerProvider))]
[Name("Roslyn Completion Service Provider")]
[ContentType(ContentTypeNames.RoslynContentType)]
[method: ImportingConstructor]
[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
internal sealed class ItemManagerProvider(RecentItemsManager recentItemsManager, EditorOptionsService editorOptionsService) : IAsyncCompletionItemManagerProvider
{
    private readonly ItemManager _instance = new(recentItemsManager, editorOptionsService);

    public IAsyncCompletionItemManager? GetOrCreate(ITextView textView)
    {
        if (textView.IsInLspEditorContext())
        {
            // If we're in an LSP editing context, we want to avoid returning a completion item manager.
            // Otherwise, we'll interfere with the LSP client manager and disrupt filtering.
            return null;
        }

        return _instance;
    }
}
