// 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.Collections.Immutable;
using System.Threading;
using System.Threading.Tasks;
 
namespace Microsoft.VisualStudio.LanguageServices.ExternalAccess.ProjectSystem.Api;
 
// Interface to be implemented and MEF exported by Project System
internal interface IProjectSystemReferenceCleanupService
{
    /// <summary>
    /// Return the set of direct Project and Package References for the given project. This
    /// is used to get the initial state of the TreatAsUsed attribute for each reference.
    /// </summary>
    Task<ImmutableArray<ProjectSystemReferenceInfo>> GetProjectReferencesAsync(
        string projectPath,
        CancellationToken cancellationToken);
 
    /// <summary>
    /// Updates the project’s references by removing or marking references as
    /// TreatAsUsed in the project file.
    /// </summary>
    /// <returns>True, if the reference was updated.</returns>
    Task<bool> TryUpdateReferenceAsync(
        string projectPath,
        ProjectSystemReferenceUpdate referenceUpdate,
        CancellationToken cancellationToken);
}