class OTP:ITwoFactorCodeProvider
    {

        public string otpAuth = string.Empty;
        private double m_mailretentionSeconds;
        private string m_popServer;
        private int m_popPort;
        private string m_popUserName;
        private string m_popPassword;


        public OTP(double mailretentionSeconds, string popServer, int popPort, string popUserName, string popPassword)
        {
            m_mailretentionSeconds = mailretentionSeconds;
            m_popServer = popServer;
            m_popPort = popPort;
            m_popUserName = popUserName;
            m_popPassword = popPassword;
        }
        public async Task<string> GetTwoFactorCodeAsync()
        {
            await GetMail();
            return await Task.FromResult<string>(otpAuth);

            throw new NotImplementedException();
        }

        public async Task GetMail()
        {
            List<Mail> mailList = new List<Mail>();
            Regex regex = new Regex(@"y=\([0-9]\)\([0-9]\)(\s|)\+(\s+|)[0-9]");
            Match match = regex.Match("y=(4)(5)+6");
            bool deleteMails = true;

            while (otpAuth == string.Empty)
            {
                while (mailList.Count < 1)
                {
                    MailProvider mailProv_get = new MailProvider(m_popServer, m_popPort, m_popUserName, m_popPassword);
                    mailList = mailProv_get.GetMails(deleteMails);
                    mailList.Reverse();
                    await Task.Delay(2000);
                }
                foreach (Mail mail in mailList)
                {
                    DateTime dateMail = Convert.ToDateTime(mail.Date);
                    if (mail.SenderMail.Contains("ea.com") == true && DateTime.Now < dateMail.AddSeconds(m_mailretentionSeconds))
                    {
                        otpAuth = Convert.ToString(Convert.ToString(ConvertToInt(mail.Title)));
                    }
                }
            }
            mailList.Clear();
            MailProvider mailProv_delete = new MailProvider(m_popServer, m_popPort, m_popUserName, m_popPassword);
            mailList = mailProv_delete.GetMails(deleteMails);
        }

        public async Task DeleteMail()
        {
            await Task.Delay(1);

            bool deleteMails = true;
            List<Mail> mailList = new List<Mail>();
            MailProvider mailProv_get = new MailProvider(m_popServer, m_popPort, m_popUserName, m_popPassword);
            mailList = mailProv_get.GetMails(deleteMails);
        }

        public static string ConvertToInt(String input)
        {
            Match match = Regex.Match(input, "-?[0-9]+");

            if (match.Success)
            {
                return match.Value;
            }
            return match.Value;
        }
    }