// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using Microsoft.DotNet.MSBuildSdkResolver;
using Strings = Microsoft.NET.Sdk.Localization.Strings;

namespace Microsoft.NET.Sdk.WorkloadManifestReader
{
    public class ManifestVersion : IEquatable<ManifestVersion>, IComparable<ManifestVersion>
    {
        private FXVersion? _version;

        public ManifestVersion(string? version)
        {
            if (!FXVersion.TryParse(version, out _version))
            {
                throw new ArgumentException(Strings.InvalidManifestVersion, version);
            }
        }

        public bool Equals(ManifestVersion? other)
        {
            return ToString().Equals(other?.ToString());
        }

        public int CompareTo(ManifestVersion? other)
        {
            return FXVersion.Compare(_version!, other?._version!);
        }

        public override bool Equals(object? obj)
        {
            return obj is ManifestVersion version && Equals(version);
        }

        public override int GetHashCode()
        {
            //  FXVersion doesn't define its own hashcode, so convert to string and get its hashcode
            return ToString().GetHashCode();
        }

        public override string ToString()
        {
            return _version?.ToString() ?? string.Empty;
        }
    }
}