// 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;
using Microsoft.CodeAnalysis.Host;

namespace Microsoft.CodeAnalysis.UnusedReferences;

internal interface IReferenceCleanupService : IWorkspaceService
{
    /// <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<ReferenceInfo>> GetProjectReferencesAsync(
        string projectPath,
        CancellationToken cancellationToken);

    /// <summary>
    /// Updates the project’s reference 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,
        ReferenceUpdate referenceUpdate,
        CancellationToken cancellationToken);
}