using Microsoft.AspNetCore.Mvc;
using System.ComponentModel.DataAnnotations;
using System.Security.Cryptography;
using System.Text;

namespace EnvelopeGenerator.Application.DTOs.Receiver;

/// <summary>
/// 
/// </summary>
[ApiExplorerSettings(IgnoreApi = true)]
public record ReceiverCreateDto
{
    /// <summary>
    /// 
    /// </summary>
    public ReceiverCreateDto()
    {
        _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);
        });
    }

    /// <summary>
    /// 
    /// </summary>
    [EmailAddress]
    public required string EmailAddress { get; init; }

    /// <summary>
    /// 
    /// </summary>
    public string? TotpSecretkey { get; init; }

    /// <summary>
    /// var bytes_arr = Encoding.UTF8.GetBytes(EmailAddress.ToUpper());<br/>
    /// var hash_arr = SHA256.HashData(bytes_arr);
    /// var hexa_str = BitConverter.ToString(hash_arr);
    /// return hexa_str.Replace("-", string.Empty);
    /// </summary>
    public string Signature => _sha256HexOfMail.Value;

    private readonly Lazy<string> _sha256HexOfMail;

    /// <summary>
    /// Default value is DateTime.Now
    /// </summary>
    public DateTime AddedWhen { get; } = DateTime.Now;
};