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

namespace DG.Core
{
    public class JsonOptionsExtensions : JsonConverter<DateTime>
	{
		private readonly string Format;
		public JsonOptionsExtensions(string format = "yyyy-MM-dd HH:mm:ss")
		{
			Format = format;
		}
		public override void Write(Utf8JsonWriter writer, DateTime date, JsonSerializerOptions options)
		{
			writer.WriteStringValue(date.ToString(Format));
		}
		public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
		{
			// 获取时间类型的字符串
			var dt = reader.GetString();
			if (!string.IsNullOrEmpty(dt))
			{
				//将日期与时间之间的"T"替换为一个空格，将结尾的"Z"去掉，否则会报错
				dt = dt.Replace("T", " ").Replace("Z", "");
				//取到秒，毫秒内容也要去掉，经过测试，不去掉会报错
				if (dt.Length > 19)
				{
					dt = dt.Substring(0, 19);
				}
				return DateTime.ParseExact(dt, Format, null);
			}
			return DateTime.Now;
		}
	}
}