// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.ComponentModel.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.VisualStudio.LiveShare;
using Microsoft.VisualStudio.Shell.Interop;
using Microsoft.VisualStudio.Threading;
 
namespace Microsoft.VisualStudio.Razor.LiveShare;
 
/// <summary>
/// In cloud scenarios a client will not have a project system which means any code running on the client needs to have the ability to
/// query the remote project system. That is what this class is responsible for.
/// </summary>
[ExportCollaborationService(
    typeof(IRemoteHierarchyService),
    Name = nameof(IRemoteHierarchyService),
    Scope = SessionScope.Host,
    Role = ServiceRole.RemoteService)]
[method: ImportingConstructor]
internal sealed class RemoteHierarchyServiceFactory(
    IVsService<SVsUIShellOpenDocument, IVsUIShellOpenDocument> vsUIShellOpenDocumentService,
    JoinableTaskContext joinableTaskContext) : ICollaborationServiceFactory
{
    public Task<ICollaborationService?> CreateServiceAsync(CollaborationSession session, CancellationToken cancellationToken)
    {
        return Task.FromResult<ICollaborationService?>(
            new RemoteHierarchyService(session, vsUIShellOpenDocumentService, joinableTaskContext.Factory));
    }
}