const Config = require('./config.js');
const nodemailer = require('nodemailer');

class Mailer {
  sender;
  started = false;
  mailer;
  constructor(host, port, email, password) {
    this.mailer = nodemailer.createTransport({
      host: host,
      port: port,
      secure: true,
      auth: {
        user: email,
        pass: password
      }
    });
    this.sender = email;
    this.started = true;
  }
  async sendMail(recipients, subject, content, contentStripped) {
    console.log(`sending mail to ${recipients}`);
    let info = await this.mailer.sendMail({
      from: `"Todo App" <${this.sender}>`,
      to: Array.isArray(recipients) ? recipients.join(', ') : recipients,
      subject: subject,
      text: contentStripped,
      html: content
    });
  }
}

if (!global.mailer || !global.mailer.started) {
  if (
    !Config.config['mail_host'] ||
    !Config.config['mail_port'] ||
    !Config.config['mail_username'] ||
    !Config.config['mail_password']
  ) {
    console.error(`could not create email account as 
mail_host, mail_port, mail_username or mail_password is not set.`);
    process.exit();
  }
  global.mailer = new Mailer(
    Config.config['mail_host'],
    Config.config['mail_port'],
    Config.config['mail_username'],
    Config.config['mail_password']
  );
}

module.exports = global.mailer;