// 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.
 
#nullable disable
 
using System;
using System.ComponentModel.Composition;
using Microsoft.CodeAnalysis.Editor.Shared.Extensions;
using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.VisualStudio.Language.Intellisense;
using Microsoft.VisualStudio.Text;
using Microsoft.VisualStudio.Text.Editor;
using Microsoft.VisualStudio.Utilities;
 
namespace Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.SignatureHelp.Presentation;
 
[Export(typeof(ISignatureHelpSourceProvider))]
[Export(typeof(IIntelliSensePresenter<ISignatureHelpPresenterSession, ISignatureHelpSession>))]
[Name(PredefinedSignatureHelpPresenterNames.RoslynSignatureHelpPresenter)]
[ContentType(ContentTypeNames.RoslynContentType)]
internal sealed partial class SignatureHelpPresenter : IIntelliSensePresenter<ISignatureHelpPresenterSession, ISignatureHelpSession>, ISignatureHelpSourceProvider
{
    private static readonly object s_augmentSessionKey = new();
    private readonly IThreadingContext _threadingContext;
    private readonly ISignatureHelpBroker _sigHelpBroker;
 
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public SignatureHelpPresenter(IThreadingContext threadingContext, ISignatureHelpBroker sigHelpBroker)
    {
        _threadingContext = threadingContext;
        _sigHelpBroker = sigHelpBroker;
    }
 
    ISignatureHelpPresenterSession IIntelliSensePresenter<ISignatureHelpPresenterSession, ISignatureHelpSession>.CreateSession(ITextView textView, ITextBuffer subjectBuffer, ISignatureHelpSession sessionOpt)
    {
        _threadingContext.ThrowIfNotOnUIThread();
        return new SignatureHelpPresenterSession(_threadingContext, _sigHelpBroker, textView);
    }
 
    ISignatureHelpSource ISignatureHelpSourceProvider.TryCreateSignatureHelpSource(ITextBuffer textBuffer)
    {
        _threadingContext.ThrowIfNotOnUIThread();
        return new SignatureHelpSource(_threadingContext);
    }
}