// 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.Diagnostics.CodeAnalysis;
 
namespace Microsoft.VisualStudio.LanguageServices.Packaging;
 
internal partial class PackageInstallerService
{
    private readonly struct ProjectState
    {
        public static readonly ProjectState Disabled = new(isEnabled: false, ImmutableDictionary<string, string>.Empty);
 
        public readonly bool IsEnabled;
 
        private readonly ImmutableDictionary<string, string> InstalledPackageToVersion;
 
        private ProjectState(bool isEnabled, ImmutableDictionary<string, string> installedPackageToVersion)
        {
            IsEnabled = isEnabled;
            InstalledPackageToVersion = installedPackageToVersion;
        }
 
        public ProjectState(ImmutableDictionary<string, string> installedPackageToVersion)
            : this(isEnabled: true, installedPackageToVersion)
        {
        }
 
        public bool IsInstalled(string package)
            => IsEnabled && InstalledPackageToVersion.ContainsKey(package);
 
        public bool TryGetInstalledVersion(string packageName, [MaybeNullWhenAttribute(false)] out string version)
            => InstalledPackageToVersion.TryGetValue(packageName, out version);
    }
}