import {
  DEFAULT_POLL_INTERVAL,
  fetchNotificationCount,
  getNotificationsUrl,
  getNotificationsUrlPattern,
} from "@/utils/api";
import { renderCount, renderError } from "@/utils/badge";
import { notificationCount } from "@/utils/storage";

const scheduleNextPoll = (intervalSeconds: number): void => {
  browser.alarms.clear("poll");
  browser.alarms.create("poll", {
    delayInMinutes: Math.max(intervalSeconds / 60, 1),
  });
};

const updateCount = async (): Promise<void> => {
  try {
    const { count, pollInterval } = await fetchNotificationCount();
    await notificationCount.setValue(count);
    renderCount(count);
    scheduleNextPoll(pollInterval);
  } catch {
    renderError();
    scheduleNextPoll(DEFAULT_POLL_INTERVAL);
  }
};

export default defineBackground(() => {
  const action = browser.action ?? browser.browserAction;

  browser.alarms.onAlarm.addListener((alarm) => {
    if (alarm.name === "poll") updateCount();
  });

  action.onClicked.addListener(async () => {
    const tabs = await browser.tabs.query({
      currentWindow: true,
      url: getNotificationsUrlPattern(),
    });

    if (tabs[0]?.id) {
      browser.tabs.update(tabs[0].id, { active: true });
      browser.tabs.reload(tabs[0].id);
    } else {
      browser.tabs.create({ url: getNotificationsUrl() });
    }

    setTimeout(updateCount, 2000);
  });

  updateCount();
});