// This code executes in its own worker or thread
self.addEventListener("install", event => {
  checkNotificationPromise();
  interval = setInterval(() => fetchAndCacheLatestNews(), 1000);
});

self.addEventListener("fetch", (e) => {
  console.log(`[Service Worker] Fetched resource ${e.request.url}`);
});

let interval = 0;

function handleNotification(title, notif) {
    if (checkNotificationPromise()) {
      self.registration.showNotification(title, notif);
    } else {
      self.registration.showNotification(title, notif);
    }
}

async function fetchAndCacheLatestNews() {
        const response = await fetch('/api/teasense');
  const data = await response.json();
      const temp = data[data.length - 1].value;
      if (temp) {
        if (temp >= ALERT_THRESHOLD) {
          handleNotification('TeaSense Alert', {
            body: '♨️ ',
            tag: 1,
          });
        } else if (temp < ALERT_THRESHOLD && temp > WARNING_THRESHOLD) {
          handleNotification('TeaSense Warning', {
            body: '🫖',
            tag: 1,
          });
        }
      }

}

function checkNotificationPromise() {
  try {
    Notification.requestPermission().then();
  } catch (e) {
    return false;
  }

  return true;
}

const ALERT_THRESHOLD = 80.0;
const WARNING_THRESHOLD = 75.0;