// Schalter für Hintergrund-Animationen (Matrix-Regen, blinkender Cursor), pro Browser gemerkt.
// Bei "Bewegung reduzieren" im System ist die Animation ohnehin aus.
const KEY = 'p42.calm';
const EVENT = 'p42:motion';

const systemReduced = () => window.matchMedia('(prefers-reduced-motion: reduce)').matches;

export function isCalm() {
  if (systemReduced()) return true;
  try { return localStorage.getItem(KEY) === '1'; } catch { return false; }
}

export function setCalm(calm) {
  try { localStorage.setItem(KEY, calm ? '1' : '0'); } catch { /* ignorieren */ }
  apply();
}

export function onMotionChange(fn) {
  window.addEventListener(EVENT, fn);
  return () => window.removeEventListener(EVENT, fn);
}

export const motionLocked = systemReduced;

function apply() {
  document.documentElement.classList.toggle('calm', isCalm());
  window.dispatchEvent(new Event(EVENT));
}

apply();