const sendEmail = (email, details) => {
  const output = (details !== undefined)
    ? `
    <p>You have a new message</p>
    <h3>Contact Details</h3>
    <ul>
      <li>Firstname: ${details.firstname}</li>
      <li>lastname: ${details.lastname}</li>
      <li>Email: ${details.email}</li>
      <li>Phone: ${details.telno}</li>
    </ul>
    <h3>Message</h3>
    <p>${details.message}</p>
    `
    :  `
    <p>You have a new contact request</p>
    <h3>Contact Details</h3>
    <ul>
      <li>Email: ${email}</li>
    </ul>
  `;

  // create reusable transporter object using the default SMTP transport
  const transporter = nodemailer.createTransport({
    host: 'mail.dptechnics.com',
    port: 587,
    secure: false, // true for 465, false for other ports
    auth: {
        user: 'website@hydropool.be', // generated ethereal user
        pass: 'makkelijkwachtwoord'  // generated ethereal password
    },
    tls:{
      rejectUnauthorized:false
    }
  });

  readFile('./data/emails.json')
    .then(res => {
      const json = JSON.parse(res);
      const emails = json.emails;


      // setup email data with unicode symbols
      const mailOptions = {
        from: `"${email}" <${email}>`, // sender address
        to: emails, // list of receivers
        subject: 'Node Contact Request', // Subject line
        html: output // html body
      };

      console.log(mailOptions);


      // send mail with defined transport object
      transporter.sendMail(mailOptions, (error, info) => {
        (error)
          ? console.log(error)
          : console.log(info)
      });
    })
    .catch(err => console.log(err))

};