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const canvas = document.getElementById("gameCanvas");
const ctx = canvas.getContext("2d");

// Ball Properties
let ballRadius = 8;
let x = canvas.width / 2;
let y = canvas.height - 30;
let dx = 2;
let dy = -2;

// Paddle Properties
let paddleHeight = 10;
let paddleWidth = 75;
let paddleX = (canvas.width - paddleWidth) / 2;
let rightPressed = false;
let leftPressed = false;

// Brick Properties
let brickRowCount = 3;
let brickColumnCount = 5;
let brickWidth = 75;
let brickHeight = 20;
let brickPadding = 10;
let brickOffsetTop = 30;
let brickOffsetLeft = 30;

// Game State
let score = 0;
let lives = 3;

// Initialize Bricks Array
let 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 };
    }
}

// Event Listeners
document.addEventListener("keydown", keyDownHandler, false);
document.addEventListener("keyup", keyUpHandler, false);
document.addEventListener("mousemove", mouseMoveHandler, false);

function keyDownHandler(e) {
    if (e.key === "Right" || e.key === "ArrowRight") rightPressed = true;
    else if (e.key === "Left" || e.key === "ArrowLeft") leftPressed = true;
}

function keyUpHandler(e) {
    if (e.key === "Right" || e.key === "ArrowRight") rightPressed = false;
    else if (e.key === "Left" || e.key === "ArrowLeft") leftPressed = false;
}

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

// Collision Detection
function collisionDetection() {
    for (let c = 0; c < brickColumnCount; c++) {
        for (let r = 0; r < brickRowCount; r++) {
            let 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++;
                    if (score === brickRowCount * brickColumnCount) {
                        alert("YOU WIN, CONGRATULATIONS!");
                        document.location.reload();
                    }
                }
            }
        }
    }
}

// Drawing Functions
function drawBall() {
    ctx.beginPath();
    ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
    ctx.fillStyle = "#ff007f";
    ctx.fill();
    ctx.closePath();
}

function drawPaddle() {
    ctx.beginPath();
    ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
    ctx.fillStyle = "#00fff0";
    ctx.fill();
    ctx.closePath();
}

function drawScore() {
    ctx.font = "16px Arial";
    ctx.fillStyle = "#ffffff";
    ctx.fillText("Score: " + score, 8, 20);
}

function drawLives() {
    ctx.font = "16px Arial";
    ctx.fillStyle = "#ffffff";
    ctx.fillText("Lives: " + lives, canvas.width - 65, 20);
}

// Main Game Loop
function draw() {
    ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear screen for redraw
    drawBricks();
    drawBall();
    drawPaddle();
    drawScore();
    drawLives();
    collisionDetection();

// Wall Collision (Left/Right)
    if (x + dx > canvas.width - ballRadius || x + dx < ballRadius) {
        dx = -dx;
    }
    // Wall Collision (Top)
    if (y + dy < ballRadius) {
        dy = -dy;
    } 
    // Bottom Collision (Paddle or Game Over)
    else if (y + dy > canvas.height - ballRadius) {
        if (x > paddleX && x < paddleX + paddleWidth) {
            dy = -dy;
        } else {
            lives--;
            if (!lives) {
                alert("GAME OVER");
                document.location.reload();
            } else {
                // Reset positions
                x = canvas.width / 2;
                y = canvas.height - 30;
                dx = 2;
                dy = -2;
                paddleX = (canvas.width - paddleWidth) / 2;
            }
        }
    }

// Move Paddle
    if (rightPressed && paddleX < canvas.width - paddleWidth) {
        paddleX += 5;
    } else if (leftPressed && paddleX > 0) {
        paddleX -= 5;
    }

// Move Ball
    x += dx;
    y += dy;

requestAnimationFrame(draw);
}

// Start Game Loop
draw();

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