// 📁 Helpers/DateOnlyJsonConverter.cs

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

namespace vendorApproverBackend.Settings
{
    public class DateOnlyJsonConverter : JsonConverter<DateTime?>
    {
        public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            if (reader.TokenType == JsonTokenType.Null)
            {
                return null;
            }

            if (reader.TokenType == JsonTokenType.String)
            {
                string? dateString = reader.GetString();
                if (string.IsNullOrEmpty(dateString))
                {
                    return null;
                }

                if (DateTime.TryParse(dateString, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime result))
                {
                
                    return result.ToUniversalTime();
                }

                throw new JsonException($"Unable to parse the date: '{dateString}'.");
            }

            return JsonSerializer.Deserialize<DateTime?>(ref reader, options);
        }

        public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
        {
            JsonSerializer.Serialize(writer, value, options);
        }
    }
}