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

namespace YLErp.Serialization
{
    public class CustomDateTimeConverter : JsonConverter<DateTime>
    {
        private readonly string Format;

        public CustomDateTimeConverter(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)
        {
            if (reader.TokenType == JsonTokenType.Null)
            {
                return DateTime.MinValue;
            }
            if (reader.TokenType == JsonTokenType.String)
            {
                var str = reader.GetString();
                if (string.IsNullOrEmpty(str))
                {
                    return DateTime.MinValue;
                }
                if (DateTime.TryParse(str, out var dt))
                {
                    return dt;
                }
            }
            throw new JsonException("解析为日期对象失败:");
        }
    }

    public class CustomJsonConverterForNullableDateTime : JsonConverter<DateTime?>
    {
        private readonly string Format;

        public CustomJsonConverterForNullableDateTime(string format = "yyyy-MM-dd HH:mm:ss")
        {
            Format = format;
        }

        public override void Write(Utf8JsonWriter writer, DateTime? date, JsonSerializerOptions options)
        {
            if (date == null)
            {
                writer.WriteStringValue("");
            }
            else
            {
                writer.WriteStringValue(date.Value.ToString(Format));
            }
        }

        public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.Null)
            {
                return null;
            }
            if (reader.TokenType == JsonTokenType.String)
            {
                var str = reader.GetString();
                if (string.IsNullOrEmpty(str))
                {
                    return null;
                }
                if (DateTime.TryParse(str, out var dt))
                {
                    return dt;
                }
            }
            throw new JsonException("解析为日期对象失败:");
        }
    }

    //public class CustomDateOnlyConverter : JsonConverter<DateOnly>
    //{
    //    private readonly string Format;
    //    public CustomDateOnlyConverter(string format)
    //    {
    //        Format = format;
    //    }
    //    public override void Write(Utf8JsonWriter writer, DateOnly date, JsonSerializerOptions options)
    //    {
    //        writer.WriteStringValue(date.ToString(Format));
    //    }
    //    public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    //    {
    //        return DateOnly.ParseExact(reader.GetString(), Format);
    //    }
    //}

    //public class CustomTimeOnlyConverter : JsonConverter<TimeOnly>
    //{
    //    private readonly string Format;
    //    public CustomTimeOnlyConverter(string format)
    //    {
    //        Format = format;
    //    }
    //    public override void Write(Utf8JsonWriter writer, TimeOnly date, JsonSerializerOptions options)
    //    {
    //        writer.WriteStringValue(date.ToString(Format));
    //    }
    //    public override TimeOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    //    {
    //        return TimeOnly.ParseExact(reader.GetString(), Format);
    //    }
    //}
}