using System;
using System.Collections.Generic;

namespace Umbraco.Cms.Infrastructure.PublishedCache.DataSource
{
    /// <summary>
    /// The serialization result from <see cref="IContentCacheDataSerializer"/> for which the serialized value
    /// will be either a string or a byte[]
    /// </summary>
    public struct ContentCacheDataSerializationResult : IEquatable<ContentCacheDataSerializationResult>
    {
        public ContentCacheDataSerializationResult(string? stringData, byte[]? byteData)
        {
            StringData = stringData;
            ByteData = byteData;
        }

        public string? StringData { get; }
        public byte[]? ByteData { get; }

        public override bool Equals(object? obj)
            => obj is ContentCacheDataSerializationResult result && Equals(result);

        public bool Equals(ContentCacheDataSerializationResult other)
            => StringData == other.StringData &&
                   EqualityComparer<byte[]>.Default.Equals(ByteData, other.ByteData);

        public override int GetHashCode()
        {
            var hashCode = 1910544615;
            if (StringData is not null)
            {
                hashCode = hashCode * -1521134295 + EqualityComparer<string>.Default.GetHashCode(StringData);
            }

            if (ByteData is not null)
            {
                hashCode = hashCode * -1521134295 + EqualityComparer<byte[]>.Default.GetHashCode(ByteData);
            }

            return hashCode;
        }

        public static bool operator ==(ContentCacheDataSerializationResult left, ContentCacheDataSerializationResult right)
            => left.Equals(right);

        public static bool operator !=(ContentCacheDataSerializationResult left, ContentCacheDataSerializationResult right)
            => !(left == right);
    }

}