// 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.
 
namespace Roslyn.LanguageServer.Protocol;
 
using System;
using System.Text.Json.Serialization;
 
/// <summary>
/// <see cref="VSImageId"/> represents the unique identifier for a Visual Studio image asset.
/// The identified is composed by a <see cref="Guid" /> and an integer.
/// A list of valid image ids can be retrieved from the <see href="https://docs.microsoft.com/en-us/dotnet/api/microsoft.visualstudio.imaging.knownmonikers">KnownMonikers class</see>
/// from the Visual Studio SDK.
/// </summary>
internal sealed class VSImageId : IEquatable<VSImageId>
{
    /// <summary>
    /// Gets or sets the <see cref="Guid" /> component of the unique identifier.
    /// </summary>
    [JsonPropertyName("_vs_guid")]
    public Guid Guid
    {
        get;
        set;
    }
 
    /// <summary>
    /// Gets or sets the integer component of the unique identifier.
    /// </summary>
    [JsonPropertyName("_vs_id")]
    public int Id
    {
        get;
        set;
    }
 
    /// <inheritdoc/>
    public override bool Equals(object obj)
    {
        return this.Equals(obj as VSImageId);
    }
 
    /// <inheritdoc/>
    public bool Equals(VSImageId? other)
    {
        return other != null &&
               this.Guid == other.Guid &&
               this.Id == other.Id;
    }
 
    /// <inheritdoc/>
    public override int GetHashCode()
    {
        var hashCode = 184147724;
        hashCode = (hashCode * -1521134295) + this.Guid.GetHashCode();
        hashCode = (hashCode * -1521134295) + this.Id.GetHashCode();
        return hashCode;
    }
}