// 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.Globalization;
using System.Text.Json.Serialization;
using Roslyn.LanguageServer.Protocol;
 
namespace Roslyn.Core.Imaging;
 
//
// Summary:
//     Unique identifier for Visual Studio image asset.
//
// Remarks:
//     On Windows systems, Microsoft.VisualStudio.Core.Imaging.ImageId can be converted
//     to and from various other image representations via the ImageIdExtensions extension
//     methods.
[JsonConverter(typeof(ImageIdConverter))]
internal struct ImageId : IEquatable<ImageId>
{
    //
    // Summary:
    //     The Microsoft.VisualStudio.Core.Imaging.ImageId.Guid identifying the group to
    //     which this image belongs.
    public readonly Guid Guid;
 
    //
    // Summary:
    //     The System.Int32 identifying the particular image from the group that this id
    //     maps to.
    public readonly int Id;
 
    //
    // Summary:
    //     Creates a new instance of ImageId.
    //
    // Parameters:
    //   guid:
    //     The Microsoft.VisualStudio.Core.Imaging.ImageId.Guid identifying the group to
    //     which this image belongs.
    //
    //   id:
    //     The System.Int32 identifying the particular image from the group that this id
    //     maps to.
    public ImageId(Guid guid, int id)
    {
        Guid = guid;
        Id = id;
    }
 
    public override string ToString()
    {
        return ToString(CultureInfo.InvariantCulture);
    }
 
    public string ToString(IFormatProvider provider)
    {
        var guid = Guid;
        var arg = guid.ToString("D", provider);
        var id = Id;
        return string.Format(provider, "{0} : {1}", arg, id.ToString(provider));
    }
 
    bool IEquatable<ImageId>.Equals(ImageId other)
    {
        var id = Id;
        if (id.Equals(other.Id))
        {
            var guid = Guid;
            return guid.Equals(other.Guid);
        }
 
        return false;
    }
 
    public override bool Equals(object other)
    {
        if (other is ImageId)
        {
            var other2 = (ImageId)other;
            return ((IEquatable<ImageId>)this).Equals(other2);
        }
 
        return false;
    }
 
    public static bool operator ==(ImageId left, ImageId right)
    {
        return left.Equals(right);
    }
 
    public static bool operator !=(ImageId left, ImageId right)
    {
        return !(left == right);
    }
 
    public override int GetHashCode()
    {
        var guid = Guid;
        var hashCode = guid.GetHashCode();
        var id = Id;
        return hashCode ^ id.GetHashCode();
    }
}