34. Symulator rzutu kostką i monetą

function useDiceRoller() {
  const [result, setResult] = useState(null);
  const [history, setHistory] = useState([]);
  const [rolling, setRolling] = useState(false);

  function roll(sides) {
    setRolling(true);
    setTimeout(() => {
      const value = Math.floor(Math.random() * sides) + 1;
      setResult({ sides, value });
      setHistory((h) => [{ sides, value, timestamp: Date.now() }, ...h.slice(0, 49)]);
      setRolling(false);
    }, 600); // animacja trwa 600ms
  }

  const stats = useMemo(() => {
    const filtered = history.filter((h) => h.sides === result?.sides);
    const counts = {};
    filtered.forEach((h) => { counts[h.value] = (counts[h.value] || 0) + 1; });
    return counts;
  }, [history, result]);

  return { result, history, rolling, stats, roll };
}