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

namespace Znyc.Recruitment.Admin.Commons.Helpers
{
    /// <summary>
    ///     时间类型格式数据处理
    /// </summary>
    public class DateTimeJsonConverter : JsonConverter<DateTime>
    {
        /// <summary>
        ///     时间格式
        /// </summary>
        private readonly string _dateFormatString;

        /// <summary>
        /// </summary>
        public DateTimeJsonConverter()
        {
            _dateFormatString = "yyyy-MM-dd HH:mm:ss";
        }

        /// <summary>
        /// </summary>
        /// <param name="dateFormatString">时间格式</param>
        public DateTimeJsonConverter(string dateFormatString)
        {
            _dateFormatString = dateFormatString;
        }

        /// <summary>
        /// </summary>
        /// <param name="reader"></param>
        /// <param name="typeToConvert"></param>
        /// <param name="options"></param>
        /// <returns></returns>
        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.String)
            {
                if (DateTime.TryParse(reader.GetString(), out DateTime date))
                {
                    return date;
                }
            }

            return reader.GetDateTime();
        }

        /// <summary>
        /// </summary>
        /// <param name="writer"></param>
        /// <param name="value"></param>
        /// <param name="options"></param>
        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value.ToString("yyyy-MM-dd HH:mm:ss"));
        }
    }

    public class DateTimeNullableConverter : JsonConverter<DateTime?>
    {
        public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            return string.IsNullOrEmpty(reader.GetString()) ? default(DateTime?) : DateTime.Parse(reader.GetString());
        }

        public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value?.ToString("yyyy-MM-dd HH:mm:ss"));
        }
    }
}