import options = require("../../services/options");
import totp_secret = require("../../services/encryption/totp_secret");
import passwordEncryptionService = require('../../services/encryption/password_encryption');
import { Request } from "express";
import totp_fs = require("../../services/totp_secret");
import ValidationError = require('../../errors/validation_error');
const speakeasy = require("speakeasy");

function verifyOTPToken(guessedToken: any) {
  const tokenValidates = speakeasy.totp.verify({
    secret: process.env.MFA_SECRET,
    encoding: "base32",
    token: guessedToken,
    window: 1,
  });

  return tokenValidates;
}

function generateSecret() {
  return { success: "true", message: speakeasy.generateSecret().base32 };
}

function checkForTOTP() {
  const totpEnabled = options.getOptionBool("totpEnabled");
  return { success: "true", message: totpEnabled };
}

function enableTOTP() {
  options.setOption("totpEnabled", true);
  return { success: "true" };
}

function disableTOTP() {
  options.setOption("totpEnabled", false);

  return { success: totp_fs.removeTotpSecret() };
}

function setTotpSecret(req: Request) {

  if(!passwordEncryptionService.verifyPassword(req.body.password))
    throw new ValidationError("Incorrect password reset confirmation");

  const regex = /[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+/;
  if (req.body.secret.length != 52) return;
  if (regex.test(req.body.secret)) return;

  totp_fs.saveTotpSecret(req.body.secret);
}

function getSecret() {
  return totp_fs.getTotpSecret();
}

export = {
  verifyOTPToken,
  generateSecret,
  checkForTOTP,
  enableTOTP,
  disableTOTP,
  setTotpSecret,
  getSecret,
};