const smtp = require('./config');
const fs = require('fs');
const handlebars = require('handlebars');

// Sender address for mail service
const sender = 'tymos@auracle.io';

// Fetches a HTML template file for parsing
const getTemplateFile = (path) => {
    return new Promise((resolve, reject) => {
        fs.readFile(path, { encoding: 'utf-8' }, (err, html) => {
            if (err) {
                reject(err);
            } else {
                resolve(html);
            }
        })
    })
};

/**
 * SEND REGISTRATION MAIL FUNCTION
 * @param {Object} data
 * - user
 *    - name
 *    - mail
 *    - token
 */
const sendRegistrationMail = (data) => {
    getTemplateFile(__dirname + '/templates/template-sign-up.html')
        .then(html => {
            let template = handlebars.compile(html);
            let template_parsed = template(data);

            let message = {
                from: sender,
                to: data.user.mail,
                subject: 'Inscription Auracle.io',
                html: template_parsed,
            };

            smtp.transport.sendMail(message, (err, info) => {
                if (err) {
                    throw err;
                } else {
                    console.log(info);
                }
            });
        })
        .catch(err => {
            console.log(err);
        });
}

const sendBanEmail = (date) => {
    return null;
}

module.exports = {
    sendRegistrationMail,
}