// 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.Runtime.Serialization;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Host;
using Roslyn.Utilities;

namespace Microsoft.CodeAnalysis.Packaging;

internal interface IPackageInstallerService : IWorkspaceService
{
    bool IsEnabled(ProjectId projectId);

    bool IsInstalled(ProjectId projectId, string packageName);

    Task<bool> TryInstallPackageAsync(
        Workspace workspace, DocumentId documentId,
        string? source, string packageName,
        string? version, bool includePrerelease,
        IProgress<CodeAnalysisProgress> progressTracker, CancellationToken cancellationToken);

    ImmutableArray<string> GetInstalledVersions(string packageName);

    ImmutableArray<Project> GetProjectsWithInstalledPackage(Solution solution, string packageName, string version);
    bool CanShowManagePackagesDialog();
    void ShowManagePackagesDialog(string packageName);

    /// <summary>
    /// Attempts to get the package sources applicable to the workspace.  Note: this call is made on a best effort
    /// basis.  If the results are not available (for example, they have not been computed, and doing so would
    /// require switching to the UI thread), then an empty array can be returned.
    /// </summary>
    /// <returns>
    /// <para>A collection of package sources.</para>
    /// </returns>
    ImmutableArray<PackageSource> TryGetPackageSources();

    event EventHandler PackageSourcesChanged;
}

[DataContract]
internal readonly struct PackageSource(string name, string source) : IEquatable<PackageSource>
{
    [DataMember(Order = 0)]
    public readonly string Name = name;

    [DataMember(Order = 1)]
    public readonly string Source = source;

    public override bool Equals(object? obj)
        => obj is PackageSource source && Equals(source);

    public bool Equals(PackageSource other)
        => Name == other.Name && Source == other.Source;

    public override int GetHashCode()
        => Hash.Combine(Name, Source.GetHashCode());
}