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

namespace HStation.WebApi
{
    /// <summary>
    /// 
    /// </summary>
    public class LongNullableJsonConverter : JsonConverter<long?>
    {


        /// <summary>
        /// 
        /// </summary>
        public override long? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.Number)
            {
                return reader.GetInt64();
            }
            var msg = reader.GetString();
            if (string.IsNullOrEmpty(msg))
            {
                return default;
            }
            return long.Parse(msg);
        }

        /// <summary>
        /// 
        /// </summary>
        public override void Write(Utf8JsonWriter writer, long? value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value?.ToString());
        }

    }
}