const nodemailer = require('nodemailer');
const pug = require('pug');
const juice = require('juice');
const htmlToText = require('html-to-text');
const promisify = require('es6-promisify');

const transport = nodemailer.createTransport({
  host: process.env.MAIL_HOST,
  port: process.env.MAIL_PORT,
  auth: {
    user: process.env.MAIL_USER,
    pass: process.env.MAIL_PASS
  }
});

const generateHTML = (filename, options={}) => {
  const html = pug.renderFile(`${__dirname}/../views/email/${filename}.pug`);
  const inlinedCSS = juice(html);
  return inlinedCSS;
};

exports.send = async (options) => {
  // console.log(options);
  const html = generateHTML(options.filename, options);
  const text = htmlToText.fromString(html);
  const optionMail = {
  from: 'Gromov <test@gmail.com>',
    to: options.user.email,
    filename: 'password-reset',
    subject: options.subject,
    html,
    text
  };
  const sendMail = promisify(transport.sendMail, transport);
  return sendMail(optionMail);
};