/* istanbul ignore file */
'use strict'
const debug = require('debug')('speckle')

const nodemailer = require('nodemailer')
const modulesDebug = debug.extend('modules')
const errorDebug = debug.extend('errors')

let transporter

const createJsonEchoTransporter = () =>
  nodemailer.createTransport({
    jsonTransport: true
  })

const initSmtpTransporter = async () => {
  try {
    const smtpTransporter = nodemailer.createTransport({
      host: process.env.EMAIL_HOST,
      port: process.env.EMAIL_PORT || 587,
      secure: process.env.EMAIL_SECURE === 'true',
      auth: {
        user: process.env.EMAIL_USERNAME,
        pass: process.env.EMAIL_PASSWORD
      }
    })
    await smtpTransporter.verify()
    return smtpTransporter
  } catch {
    errorDebug('📧 Email provider is misconfigured, check config variables.')
  }
}

const initTransporter = async () => {
  if (process.env.NODE_ENV === 'test') return createJsonEchoTransporter()
  if (process.env.EMAIL === 'true') return await initSmtpTransporter()

  modulesDebug(
    '📧 Email provider is not configured. Server functionality will be limited.'
  )
}

exports.init = async (app) => {
  modulesDebug('📧 Init emails module')
  transporter = await initTransporter()
  require('./rest')(app)
}

exports.finalize = async () => {
  // Nothing to do here.
}

exports.sendEmail = async ({ from, to, subject, text, html }) => {
  // note, the transporter is only initialized with the app init step
  if (!transporter) {
    errorDebug('No email transport present. Cannot send emails.')
    return false
  }
  try {
    const emailFrom = process.env.EMAIL_FROM || 'no-reply@speckle.systems'
    return await transporter.sendMail({
      from: from || `"Speckle" <${emailFrom}>`,
      to,
      subject,
      text,
      html
    })
  } catch (error) {
    errorDebug(error)
  }
}