// 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>
/// Class representing a description for an error code in a <see cref="Diagnostic"/>.
/// <para>
/// See the <see href="https://microsoft.github.io/language-server-protocol/specifications/specification-current/#codeDescription">Language Server Protocol specification</see> for additional information.
/// </para>
/// </summary>
/// <remarks>Since LSP 3.16</remarks>
internal sealed class CodeDescription : IEquatable<CodeDescription>
{
    /// <summary>
    /// Gets or sets URI to open with more information about the diagnostic error.
    /// </summary>
    [JsonPropertyName("href")]
    [JsonConverter(typeof(DocumentUriConverter))]
    public DocumentUri Href
    {
        get;
        set;
    }
 
    public static bool operator ==(CodeDescription? value1, CodeDescription? value2)
    {
        if (ReferenceEquals(value1, value2))
        {
            return true;
        }
 
        if (ReferenceEquals(null, value2))
        {
            return false;
        }
 
        return value1?.Equals(value2) ?? false;
    }
 
    public static bool operator !=(CodeDescription? value1, CodeDescription? value2)
    {
        return !(value1 == value2);
    }
 
    /// <inheritdoc/>
    public bool Equals(CodeDescription other)
    {
        return other is not null
            && this.Href == other.Href;
    }
 
    /// <inheritdoc/>
    public override bool Equals(object obj)
    {
        if (obj is CodeDescription other)
        {
            return this.Equals(other);
        }
        else
        {
            return false;
        }
    }
 
    /// <inheritdoc/>
    public override int GetHashCode()
    {
        return this.Href == null ? 53 : this.Href.GetHashCode();
    }
}