using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Wood.Util
{
    public class DateOnlyConverter:JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return objectType == typeof(DateTime) || objectType == typeof(DateTime?);
        }
	
		public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
		{
			if ((reader.Value == null || reader.Value.ToString() == "") && objectType.IsNullableType())
		        return null;
		    return Convert.ToDateTime(reader.Value).Date;
		}

		public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
		{
			if (value == null)
			{
				writer.WriteNull();
				return;
			}
			DateTime? dt = value as DateTime?;
			if (dt == null)
			{
				writer.WriteNull();
				return;
			}
			writer.WriteValue(dt.Value.ToString("yyyy-MM-dd"));
		}
	}
}