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

namespace RobotNet.VDA5050;

public class DateTimeConverter : JsonConverter<DateTime>
{
    private const string Format = "yyyy-MM-ddTHH:mm:ss.fffZ";

    public override DateTime Read(ref Utf8JsonReader reader, System.Type typeToConvert, JsonSerializerOptions options)
    {
        var str = reader.GetString();
        if (str != null && str.EndsWith('Z'))
        {
            str = str[..^1];
            return DateTime.ParseExact(str, "yyyy-MM-ddTHH:mm:ss.fff", null, System.Globalization.DateTimeStyles.AssumeUniversal);
        }
        return DateTime.Parse(str!, null, System.Globalization.DateTimeStyles.AssumeUniversal);
    }

    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
    {
        var utc = value.ToUniversalTime();
        writer.WriteStringValue(utc.ToString(Format));
    }
}