using System;
using System.Globalization;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace MediaBrowser.Common.Json.Converters
{
    /// <summary>
    /// Converts a GUID object or value to/from JSON.
    /// </summary>
    public class JsonNullableGuidConverter : JsonConverter<Guid?>
    {
        /// <inheritdoc />
        public override Guid? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var guidStr = reader.GetString();
            return guidStr == null ? null : new Guid(guidStr);
        }

        /// <inheritdoc />
        public override void Write(Utf8JsonWriter writer, Guid? value, JsonSerializerOptions options)
        {
            if (value == null || value == Guid.Empty)
            {
                writer.WriteNullValue();
            }
            else
            {
                writer.WriteStringValue(value.Value.ToString("N", CultureInfo.InvariantCulture));
            }
        }
    }
}