using System;

using OtpNet;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var headBase32Bytes = GetRandomSecret();

        var tailBase32Bytes = GetRandomSecret();

        var headTotp = new Totp(headBase32Bytes, 30, OtpHashMode.Sha256, totpSize:8);

        var tailTotp = new Totp(tailBase32Bytes, 30, OtpHashMode.Sha256, totpSize:8);

        var dateTime = DateTime.Now;

        var headTotpCode = headTotp.ComputeTotp(dateTime);

        var tailTotpCode = tailTotp.ComputeTotp(dateTime);

        var randomCode = $"{headTotpCode}{tailTotpCode}";

        Console.WriteLine($"random code is : {randomCode}");

    }

    private static byte[] GetRandomSecret()

    {

        var key = KeyGeneration.GenerateRandomKey(20);

        var base32String = Base32Encoding.ToString(key);

        //Console.WriteLine(base32String);

        var base32Bytes = OtpNet.Base32Encoding.ToBytes(base32String);

        return base32Bytes;

    }

}