//Mail
const nodemailer = require('nodemailer')
const postmarkTransport = require('nodemailer-postmark-transport')


// Google Cloud environment variable used:
// firebase functions:config:set postmark.key="API-KEY-HERE"
const postmarkKey = functions.config().postmark.key
const mailTransport = nodemailer.createTransport(postmarkTransport({
auth: {
    apiKey: postmarkKey
}
}))
exports.OnUserCreation = functions.auth.user().onCreate((user) =>
{
console.log("user created: " + user.data.uid);
sendEmail(user);
})

function sendEmail(user)
{
// Send welcome email to new users
const mailOptions =
{
    from: '"test" <test@test.com>',
    to: user.email,
    subject: 'Welcome!',
    html: 'hello'
}
// Process the sending of this email via nodemailer
return mailTransport.sendMail(mailOptions)
    .then(() => console.log('Welcome confirmation email sent'))
    .catch((error) => console.error('There was an error while sending the welcome email:', error))
}

const mailOptions = {
        from: 'test@test.com',
        to: user.email,
        subject: 'Welcome!',
        textBody: 'hello'
    }