using System.ComponentModel.DataAnnotations;
using System.Security.Cryptography;
using System.Text;

namespace EnvelopeGenerator.Application.DTOs.Receiver
{
    public record ReceiverCreateDto([EmailAddress] string EmailAddress, string? TotpSecretkey = null, DateTime? TotpExpiration = null)
    {
        public string Signature => sha256HexOfMail.Value;

        private readonly Lazy<string> sha256HexOfMail = new(() =>
        {
            var bytes_arr = Encoding.UTF8.GetBytes(EmailAddress.ToUpper());
            var hash_arr = SHA256.HashData(bytes_arr);
            var hexa_str = BitConverter.ToString(hash_arr);
            return hexa_str.Replace("-", string.Empty);
        });

        public DateTime AddedWhen { get; } = DateTime.Now;
    };
}