// 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.Collections.Immutable;
using System.Composition;
using System.Linq;
using Microsoft.CodeAnalysis.Host;
using Microsoft.CodeAnalysis.Host.Mef;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Editor.Test;
 
internal sealed class FirstDocumentIsActiveAndVisibleDocumentTrackingService : IDocumentTrackingService
{
    private readonly Workspace _workspace;
 
    [Obsolete(MefConstruction.FactoryMethodMessage, error: true)]
    private FirstDocumentIsActiveAndVisibleDocumentTrackingService(Workspace workspace)
        => _workspace = workspace;
 
    public event EventHandler<DocumentId?> ActiveDocumentChanged { add { } remove { } }
 
    public DocumentId TryGetActiveDocument()
        => _workspace.CurrentSolution.Projects.First().DocumentIds.First();
 
    public ImmutableArray<DocumentId> GetVisibleDocuments()
        => [TryGetActiveDocument()];
 
    [ExportWorkspaceServiceFactory(typeof(IDocumentTrackingService), ServiceLayer.Test), Shared, PartNotDiscoverable]
    public class Factory : IWorkspaceServiceFactory
    {
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public Factory()
        {
        }
 
        [Obsolete(MefConstruction.FactoryMethodMessage, error: true)]
        public IWorkspaceService CreateService(HostWorkspaceServices workspaceServices)
            => new FirstDocumentIsActiveAndVisibleDocumentTrackingService(workspaceServices.Workspace);
    }
}