export const zones = ['shore', 'rocks', 'pool'];

export function nextZone(currentIndex, direction) {
  const step = direction === 'previous' ? -1 : 1;
  return (currentIndex + step + zones.length) % zones.length;
}

export function directionForKey(key) {
  if (key === 'ArrowLeft' || key === 'ArrowUp') return 'previous';
  if (key === 'ArrowRight' || key === 'ArrowDown') return 'next';
  return null;
}