const { useState } = React;

export function Board() {
  const [squares, setSquares] = useState(Array(9).fill(null));
  const [xIsNext, setXIsNext] = useState(true);

  const calculateWinner = (squares) => {
    const lines = [
      [0, 1, 2], [3, 4, 5], [6, 7, 8], 
      [0, 3, 6], [1, 4, 7], [2, 5, 8], 
      [0, 4, 8], [2, 4, 6]             
    ];
    for (let i = 0; i < lines.length; i++) {
      const [a, b, c] = lines[i];
      if (squares[a] && squares[a] === squares[b] && squares[a] === squares[c]) {
        return squares[a];
      }
    }
    return null;
  };

  const winner = calculateWinner(squares);
  const isDraw = !winner && squares.every(square => square !== null);

  const handleClick = (i) => {
    if (winner || squares[i]) return;

    const nextSquares = squares.slice();
    nextSquares[i] = xIsNext ? "X" : "O";
    setSquares(nextSquares);
    setXIsNext(!xIsNext);
  };

  const handleReset = () => {
    setSquares(Array(9).fill(null));
    setXIsNext(true);
  };

  let status;
  if (winner) {
    status = `Winner: ${winner}`;
  } else if (isDraw) {
    status = "Result: Draw";
  } else {
    status = `Next player: ${xIsNext ? "X" : "O"}`;
  }

  return (
    <div className="game-container">
      <div className="status">{status}</div>
      <div className="board-grid">
        {squares.map((value, i) => (
          <button 
            key={i} 
            className="square" 
            onClick={() => handleClick(i)}
          >
            {value}
          </button>
        ))}
      </div>
      <button id="reset" onClick={handleReset}>Reset Game</button>
    </div>
  );
}