(function () {
  let settings = DEFAULT_SETTINGS;
  const recentClicks = new WeakMap();
  const CLICK_COOLDOWN_MS = 1500;

  function isSkipIntroButton(text) {
    return text.indexOf("skip intro") !== -1;
  }

  function isSkipCreditsButton(text) {
    return text.indexOf("skip credit") !== -1;
  }

  function isVisible(el) {
    const style = window.getComputedStyle(el);
    return style.display !== "none" && style.visibility !== "hidden" && style.opacity !== "0";
  }

  function canClick(el) {
    const last = recentClicks.get(el);
    if (last && Date.now() - last < CLICK_COOLDOWN_MS) return false;
    recentClicks.set(el, Date.now());
    return true;
  }

  function scanAndClick() {
    if (!settings.skipIntro && !settings.skipCredits) return;
    if (!hostMatchesConfig(window.location.hostname, settings.plexUrl)) return;

    const nodes = document.querySelectorAll('button, [role="button"]');
    nodes.forEach((el) => {
      const text = (el.innerText || el.textContent || "").trim().toLowerCase();
      if (!text) return;
      if (!isVisible(el)) return;

      const wantsIntroSkip = settings.skipIntro && isSkipIntroButton(text);
      const wantsCreditsSkip = settings.skipCredits && isSkipCreditsButton(text);
      if (!wantsIntroSkip && !wantsCreditsSkip) return;

      if (canClick(el)) el.click();
    });
  }

  function start() {
    const observer = new MutationObserver(scanAndClick);
    observer.observe(document.documentElement, { childList: true, subtree: true });
    scanAndClick();
  }

  chrome.storage.sync.get(DEFAULT_SETTINGS, (loaded) => {
    settings = loaded;
    start();
  });

  chrome.storage.onChanged.addListener((changes, area) => {
    if (area !== "sync") return;
    Object.keys(changes).forEach((key) => {
      settings[key] = changes[key].newValue;
    });
  });
})();