const canvas = document.getElementById('gameCanvas');
const ctx = canvas.getContext('2d');
const scoreSpan = document.getElementById('score-value');
const restartBtn = document.getElementById('restart-btn');
const gameOverDiv = document.getElementById('game-over-message');

const ballRadius = 8;
let x, y, dx, dy;
const paddleHeight = 12, paddleWidth = 75;
let paddleX;
const brickRowCount = 5, brickColumnCount = 7;
const brickWidth = 60, brickHeight = 20, brickPadding = 10, brickOffsetTop = 30, brickOffsetLeft = 30;
let bricks = [];
let score, gameOver;

function setupBricks() {
  bricks = [];
  for(let c=0; c<brickColumnCount; c++) {
    bricks[c] = [];
    for(let r=0; r<brickRowCount; r++) {
      bricks[c][r] = { x:0, y:0, status:1 };
    }
  }
}

function startGame() {
  x = canvas.width/2;
  y = canvas.height-30;
  dx = 3;
  dy = -3;
  paddleX = (canvas.width-paddleWidth)/2;
  score = 0;
  scoreSpan.textContent = score;
  gameOver = false;
  gameOverDiv.textContent = '';
  setupBricks();
  document.addEventListener("mousemove", mouseMoveHandler);
  draw();
}

function mouseMoveHandler(e) {
  const rect = canvas.getBoundingClientRect();
  let relativeX = e.clientX - rect.left;
  if(relativeX > 0 && relativeX < canvas.width) {
    paddleX = relativeX - paddleWidth/2;
    if(paddleX < 0) paddleX = 0;
    if(paddleX + paddleWidth > canvas.width) paddleX = canvas.width - paddleWidth;
  }
}

function collisionDetection() {
  for(let c=0; c<brickColumnCount; c++) {
    for(let r=0; r<brickRowCount; r++) {
      const b = bricks[c][r];
      if(b.status == 1) {
        if(x > b.x && x < b.x+brickWidth && y > b.y && y < b.y+brickHeight) {
          dy = -dy;
          b.status = 0;
          score++;
          scoreSpan.textContent = score;
          if(score == brickRowCount*brickColumnCount) {
            gameOver = true;
            gameOverDiv.textContent = "¡Ganaste! 🏆";
            return;
          }
        }
      }
    }
  }
}

function drawBall() {
  ctx.beginPath();
  ctx.arc(x, y, ballRadius, 0, Math.PI*2);
  ctx.fillStyle = "#f9d923";
  ctx.fill();
  ctx.closePath();
}

function drawPaddle() {
  ctx.beginPath();
  ctx.rect(paddleX, canvas.height-paddleHeight-5, paddleWidth, paddleHeight);
  ctx.fillStyle = "#e94560";
  ctx.fill();
  ctx.closePath();
}

function drawBricks() {
  for(let c=0; c<brickColumnCount; c++) {
    for(let r=0; r<brickRowCount; r++) {
      if(bricks[c][r].status == 1) {
        const brickX = (c*(brickWidth+brickPadding))+brickOffsetLeft;
        const brickY = (r*(brickHeight+brickPadding))+brickOffsetTop;
        bricks[c][r].x = brickX;
        bricks[c][r].y = brickY;
        ctx.beginPath();
        ctx.rect(brickX, brickY, brickWidth, brickHeight);
        ctx.fillStyle = "#393e46";
        ctx.strokeStyle = "#f9d923";
        ctx.fill();
        ctx.stroke();
        ctx.closePath();
      }
    }
  }
}

function draw() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  drawBricks();
  drawBall();
  drawPaddle();
  collisionDetection();

  // Rebote en las paredes
  if(x + dx > canvas.width-ballRadius || x + dx < ballRadius) {
    dx = -dx;
  }
  if(y + dy < ballRadius) {
    dy = -dy;
  } else if(y + dy > canvas.height-ballRadius-paddleHeight-5) {
    // Rebote en la paleta
    if(x > paddleX && x < paddleX + paddleWidth) {
      dy = -dy;
    } else if (y + dy > canvas.height-ballRadius) {
      // GAME OVER
      gameOver = true;
      gameOverDiv.textContent = "¡Game Over! 😢";
      return;
    }
  }

  x += dx;
  y += dy;

  if(!gameOver) {
    requestAnimationFrame(draw);
  }
}

restartBtn.onclick = function() {
  document.removeEventListener("mousemove", mouseMoveHandler);
  startGame();
};

// Inicio
startGame();