// 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 Microsoft.CodeAnalysis.Editor.Shared.Extensions;
 
namespace Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.SignatureHelp;
 
internal sealed partial class Controller
{
    internal sealed partial class Session : Session<Controller, Model, ISignatureHelpPresenterSession>
    {
        public Session(Controller controller, ISignatureHelpPresenterSession presenterSession)
            : base(controller, new ModelComputation<Model>(controller.ThreadingContext, controller), presenterSession)
        {
            this.PresenterSession.ItemSelected += OnPresenterSessionItemSelected;
        }
 
        public override void Stop()
        {
            this.Computation.ThreadingContext.ThrowIfNotOnUIThread();
            this.PresenterSession.ItemSelected -= OnPresenterSessionItemSelected;
            base.Stop();
        }
 
        private void OnPresenterSessionItemSelected(object sender, SignatureHelpItemEventArgs e)
        {
            this.Computation.ThreadingContext.ThrowIfNotOnUIThread();
            Contract.ThrowIfFalse(ReferenceEquals(this.PresenterSession, sender));
 
            SetModelExplicitlySelectedItem(m => e.SignatureHelpItem);
        }
    }
}