import { $ } from './dom-utils'

// Ce fichier est généré au build par le plugin parcel-plugin-sw-cache
const swName = './sw.js'
window.isUpdateAvailable = new Promise(function (resolve, reject) {
  // lazy way of disabling service workers while developing
  if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register(swName)
      .then(registration => {
        registration.onupdatefound = () => {
          const installingWorker = registration.installing
          installingWorker.onstatechange = () => {
            switch (installingWorker.state) {
              case 'installed':
                if (navigator.serviceWorker.controller) {
                  // new update available
                  resolve(true)
                } else {
                  // no update available
                  resolve(false)
                }
                break
            }
          }
        }
      })
      .catch(err => console.error('[SW ERROR]', err))
  }
})

window.isUpdateAvailable.then(isAvailable => {
  $('#reload-btn').addEventListener('click', () => window.location.reload())
  $('#update-alert').classList.remove('d-none')
})