The Star Match Game

const StarsDisplay = props => (
  <>
    {utils.range(1, props.count).map(starId =>
      <div key={starId} className="star" />
    )}
  </>
);

const PlayNumber = (props) => (
  <button
    className="number"
    style={{backgroundColor: colors[props.status]}}
    onClick={() => props.onClick(props.number, props.status)}
  >
    {props.number}
  </button>
);

const PlayAgain = props => (
  <div className="game-done">
    <div
      className="message"
      style={{ color: props.gameStatus === 'lost' ? 'red' : 'green' }}
    >
      {props.gameStatus === 'lost' ? 'Game Over' : 'Nice'}
    </div>
    <button onClick={props.onClick}>Play again</button>
  </div>
);

// Hooks que extrae as partes comentadas
const useGameState = () => {
  const [stars, setStars] = useState(utils.random(1,9));
  const [availableNums, setAvailableNums] = useState(utils.range(1, 9));
  const [candidateNums, setCandidateNums] = useState([]);
  const [secondsLeft, setSecondsLeft] = useState(10);

  useEffect(() => {
    if (secondsLeft > 0 && availableNums.length > 0) {
      const timerId = setTimeout(() => {
        setSecondsLeft(secondsLeft - 1);
      }, 1000);
      return () => clearTimeout(timerId);
    }
  });

  const setGameState = (newCandidateNums) => {
    if (utils.sum(newCandidateNums) !== stars) {
      setCandidateNums(newCandidateNums)
    } else {
      const newAvailableNums = availableNums.filter(
        n => !newCandidateNums.includes(n)
      );
      setStars(utils.randomSumIn(newAvailableNums, 9));
      setAvailableNums(newAvailableNums);
      setCandidateNums([]);
    }
  }
  return { stars, availableNums, candidateNums, secondsLeft, setGameState };
}

const Game = (props) => {
//  const [stars, setStars] = useState(utils.random(1,9));
//  const [availableNums, setAvailableNums] = useState(utils.range(1, 9));
//  const [candidateNums, setCandidateNums] = useState([]);
//  const [secondsLeft, setSecondsLeft] = useState(10);
//
//  useEffect(() => {
//    if (secondsLeft > 0 && availableNums.length > 0) {
//      const timerId = setTimeout(() => {
//        setSecondsLeft(secondsLeft - 1);
//      }, 1000);
//      return () => clearTimeout(timerId);
//    }
//  });
  const {
    stars,
    availableNums,
    candidateNums,
    secondsLeft,
    setGameState
  } = useGameState();

  const candidatesAreWrong = utils.sum(candidateNums) > stars;
  const gameStatus = availableNums.length === 0 ?
        'won'
        : secondsLeft === 0 ? 'lost' : 'active'



  const numberStatus = (number) => {
    if (!availableNums.includes(number)) {
      return 'used';
    }
    if (candidateNums.includes(number)) {
      return candidatesAreWrong ? 'wrong' : 'candidate';
    }
    return 'available';
  };

  const onNumberClick = (number, currentStatus) => {
    if (gameStatus !== 'active' || currentStatus == 'used') {
      return
    }
    const newCandidateNums =
      currentStatus === 'available'
        ? candidateNums.concat(number)
        : candidateNums.filter(cn => cn !== number)

//    if (utils.sum(newCandidateNums) !== stars) {
//      setCandidateNums(newCandidateNums)
//    } else {
//      const newAvailableNums = availableNums.filter(
//        n => !newCandidateNums.includes(n)
//      );
//      setStars(utils.randomSumIn(newAvailableNums, 9));
//      setAvailableNums(newAvailableNums);
//      setCandidateNums([]);
//    }
    setGameState(newCandidateNums)
  }

  return (
    <div className="game">
      <div className="help">
        Pick 1 or more numbers that sum to the number of stars
      </div>
      <div className="body">
        <div className="left">
          {gameStatus !== 'active' ? (
            <PlayAgain onClick={props.startNewGame} gameStatus={gameStatus} />
          ) : (
            <StarsDisplay count={stars}/>
          )}
        </div>
        <div className="right">
          {utils.range(1, 9).map(number =>
            <PlayNumber
              key={number}
              status={numberStatus(number)}
              number={number}
              onClick={onNumberClick}
            />
          )}
        </div>
      </div>
      <div className="timer">Time Remaining: {secondsLeft}</div>
    </div>
  );
};

const StarMatch = () => {
  const [gameId, setGameId] = useState(1);
  // Cando se fai click en 'Play Again' chámase a función que se pasa en
  // startNewGame. Esa función modifica a key do compoñente, polo que react
  // desmonta o compoñente e volve montar un novo, reseteando así todos os
  // valores e dando comezo a unha nova partida.
  return <Game key={gameId} startNewGame={() => setGameId(gameId + 1)} />;
}

// Color Theme
const colors = {
  available: 'lightgray',
  used: 'lightgreen',
  wrong: 'lightcoral',
  candidate: 'deepskyblue',
};

// Math science
const utils = {
  // Sum an array
  sum: arr => arr.reduce((acc, curr) => acc + curr, 0),

  // create an array of numbers between min and max (edges included)
  range: (min, max) => Array.from({ length: max - min + 1 }, (_, i) => min + i),

  // pick a random number between min and max (edges included)
  random: (min, max) => min + Math.floor(Math.random() * (max - min + 1)),

  // Given an array of numbers and a max...
  // Pick a random sum (< max) from the set of all available sums in arr
  randomSumIn: (arr, max) => {
    const sets = [[]];
    const sums = [];
    for (let i = 0; i < arr.length; i++) {
      for (let j = 0, len = sets.length; j < len; j++) {
        const candidateSet = sets[j].concat(arr[i]);
        const candidateSum = utils.sum(candidateSet);
        if (candidateSum <= max) {
          sets.push(candidateSet);
          sums.push(candidateSum);
        }
      }
    }
    return sums[utils.random(0, sums.length - 1)];
  },
};

ReactDOM.render(<StarMatch />, mountNode);