/**** 
* Classes
****/ 
var BodyPart = Container.expand(function () {
	var self = Container.call(this);
	var bodyPart = self.attachAsset('head', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var BonusFood = Container.expand(function () {
	var self = Container.call(this);
	// Create the bonus food
	var bonusFood = self.attachAsset('bonusFood', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Food = Container.expand(function () {
	var self = Container.call(this);
	// Create the food
	var food = self.attachAsset('food', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Life = Container.expand(function () {
	var self = Container.call(this);
	// Create the life
	var life = self.attachAsset('life', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Pause = Container.expand(function () {
	var self = Container.call(this);
	// Create the pause button
	var pause = self.attachAsset('pause', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Event handler called when a press happens on element.
	self.down = function (x, y, obj) {
		if (!game.paused) {
			game.paused = true;
			pause.id = 'resume';
		} else {
			game.paused = false;
			pause.id = 'pause';
		}
	};
});
var Poison = Container.expand(function () {
	var self = Container.call(this);
	// Create the poison
	var poison = self.attachAsset('poison', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var Snake = Container.expand(function () {
	var self = Container.call(this);
	// Create the head of the snake
	var head = self.attachAsset('head', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Initialize the snake's direction and speed
	self.direction = 'up';
	self.speed = 5;
	self.moveHead = function (newDirection) {
		if (newDirection === 'up' && this.direction !== 'down') {
			this.direction = 'up';
		} else if (newDirection === 'down' && this.direction !== 'up') {
			this.direction = 'down';
		} else if (newDirection === 'left' && this.direction !== 'right') {
			this.direction = 'left';
		} else if (newDirection === 'right' && this.direction !== 'left') {
			this.direction = 'right';
		}
	};
});

/**** 
* Initialize Game
****/ 
//<Assets used in the game will automatically appear here>
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
// Add a background to the game
var background = game.addChild(LK.getAsset('newBackground', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2
}));
// Initialize pause button
var pause = game.addChild(new Pause());
// Position the pause button a little to the left from the top right corner of the game
pause.x = 2048 - pause.width;
pause.y = 50; // Move the pause button a little down
var snake = game.addChild(new Snake());
snake.body = [];
// Position the snake at the center of the game
snake.x = 2048 / 2;
snake.y = 2732 / 2;
// Initialize food
var food = game.addChild(new Food());
// Position the food at a random location within the game
food.x = Math.random() * 2048;
food.y = Math.random() * 2732;
// Initialize poison
var bonusFood = game.addChild(new BonusFood());
// Hide the bonus food when the game starts
bonusFood.x = -100;
bonusFood.y = -100;
var poison = game.addChild(new Poison());
// Initialize life
var life = game.addChild(new Life());
// Hide the life when the game starts
life.x = -100;
life.y = -100;
// Hide the poison when the game starts
poison.x = -100;
poison.y = -100;
game.update = function () {
	if (game.paused) {
		return;
	}
	// Update the snake's position based on its direction and speed
	if (snake.direction === 'up') {
		snake.y -= snake.speed * 2.25;
	} else if (snake.direction === 'down') {
		snake.y += snake.speed * 2.25;
	} else if (snake.direction === 'left') {
		snake.x -= snake.speed * 2.25;
	} else if (snake.direction === 'right') {
		snake.x += snake.speed * 2.25;
	}
	// Update the position of the body parts to follow the head
	for (var i = snake.body.length - 1; i > 0; i--) {
		snake.body[i].x = snake.body[i - 1].x;
		snake.body[i].y = snake.body[i - 1].y;
	}
	if (snake.body.length > 0) {
		snake.body[0].x = snake.x;
		snake.body[0].y = snake.y;
	}
	// Check if the snake's head intersects with the food
	if (snake.intersects(food)) {
		// Increase the score
		score += 10;
		// Update the score text
		scoreTxt.setText('Score: ' + score);
		// Increase the food consumed count
		foodConsumed += 1;
		// Add a new body part to the snake
		var newBodyPart = new BodyPart();
		if (snake.body.length === 0) {
			// Add the first body part to the edge of the head
			if (snake.direction === 'up') {
				newBodyPart.x = snake.x;
				newBodyPart.y = snake.y + snake.height;
			} else if (snake.direction === 'down') {
				newBodyPart.x = snake.x;
				newBodyPart.y = snake.y - snake.height;
			} else if (snake.direction === 'left') {
				newBodyPart.x = snake.x + snake.width;
				newBodyPart.y = snake.y;
			} else if (snake.direction === 'right') {
				newBodyPart.x = snake.x - snake.width;
				newBodyPart.y = snake.y;
			}
		} else {
			// Add subsequent body parts to the edge of the last body part
			var lastBodyPart = snake.body[snake.body.length - 1];
			if (snake.direction === 'up') {
				newBodyPart.x = lastBodyPart.x;
				newBodyPart.y = lastBodyPart.y + lastBodyPart.height;
			} else if (snake.direction === 'down') {
				newBodyPart.x = lastBodyPart.x;
				newBodyPart.y = lastBodyPart.y - lastBodyPart.height;
			} else if (snake.direction === 'left') {
				newBodyPart.x = lastBodyPart.x + lastBodyPart.width;
				newBodyPart.y = lastBodyPart.y;
			} else if (snake.direction === 'right') {
				newBodyPart.x = lastBodyPart.x - lastBodyPart.width;
				newBodyPart.y = lastBodyPart.y;
			}
		}
		snake.body.push(newBodyPart);
		game.addChild(newBodyPart);
		// Check if it's time to show the bonus food
		if (score % 150 === 0) {
			// Position the bonus food at a new random location within the game, ensuring it does not appear on the border
			do {
				bonusFood.x = Math.random() * (2048 - bonusFood.width) + bonusFood.width / 2;
				bonusFood.y = Math.random() * (2732 - bonusFood.height) + bonusFood.height / 2;
			} while ((bonusFood.x < 100 || bonusFood.x > 1948) && (bonusFood.y < 100 || bonusFood.y > 2632));
			// Show the bonus food for 8 seconds
			LK.setTimeout(function () {
				bonusFood.x = -100;
				bonusFood.y = -100;
			}, 8000);
		}
		// Check if it's time to show the life
		if (score !== 0 && score % 100 === 0 && score != previousScore) {
			previousScore = score;
			// Position the life at a new random location within the game, ensuring it does not appear on the border
			do {
				life.x = Math.random() * (2048 - life.width) + life.width / 2;
				life.y = Math.random() * (2732 - life.height) + life.height / 2;
			} while ((life.x < 100 || life.x > 1948) && (life.y < 100 || life.y > 2632));
			// Show the life for 10 seconds
			LK.setTimeout(function () {
				life.x = -100;
				life.y = -100;
			}, 10000);
		}
		// Check if it's time to show the poison
		if (foodConsumed === 8 && !poisonGenerated) {
			// Position the poison at a new random location within the game, ensuring it does not appear on the border
			do {
				poison.x = Math.random() * (2048 - poison.width) + poison.width / 2;
				poison.y = Math.random() * (2732 - poison.height) + poison.height / 2;
			} while ((poison.x < 100 || poison.x > 1948) && (poison.y < 100 || poison.y > 2632));
			// Show the poison for 8 seconds
			LK.setTimeout(function () {
				poison.x = -100;
				poison.y = -100;
			}, 8000);
			poisonGenerated = true;
			foodConsumed = 0; // Reset the food consumed count after generating poison
		}
		// Position the food at a new random location within the game, ensuring it does not appear on the border
		do {
			food.x = Math.random() * (2048 - food.width) + food.width / 2;
			food.y = Math.random() * (2732 - food.height) + food.height / 2;
		} while ((food.x < 100 || food.x > 1948) && (food.y < 100 || food.y > 2632));
	}
	// Check if the snake's head intersects with the bonus food
	if (snake.intersects(bonusFood)) {
		// Increase the score by 50
		score += 50;
		// Update the score text
		scoreTxt.setText('Score: ' + score);
		// Play the bonus food sound
		LK.getSound('bonusfood').play();
		// Hide the bonus food
		bonusFood.x = -100;
		bonusFood.y = -100;
	}
	// Check if the snake's head intersects with the life
	if (snake.intersects(life)) {
		// Increase the lives by 1, up to a maximum of 8
		if (lives < 8) {
			lives += 1;
			// Update the lives text
			livesTxt.setText('Lives: ' + lives);
			// Play the life sound
			LK.getSound('life').play();
		}
		// Hide the life
		life.x = -100;
		life.y = -100;
	}
	// Check if the snake's head intersects with the poison
	if (snake.intersects(poison)) {
		// Decrease the lives
		lives -= 1;
		// Update the lives text
		livesTxt.setText('Lives: ' + lives);
		// Play the poison sound
		LK.getSound('poison').play();
		// Hide the poison
		poison.x = -100;
		poison.y = -100;
		// Reset the food consumed count after consuming poison
		foodConsumed = 0;
		// Check if the lives have hit 0
		if (lives === 0) {
			// Show game over
			LK.getSound('GameOver').play();
			LK.showGameOver();
		}
	}
	// Check if the snake's head has moved out of the screen
	if (snake.x < 0) {
		snake.x = 2048;
	} else if (snake.x > 2048) {
		snake.x = 0;
	} else if (snake.y < 0) {
		snake.y = 2732;
	} else if (snake.y > 2732) {
		snake.y = 0;
	}
};
// Initialize lives, score, food consumed and poison generated
var lives = 3;
var score = 0;
var previousScore = 0;
var foodConsumed = 0;
var poisonGenerated = false;
// Create lives text
var livesTxt = new Text2('Lives: ' + lives, {
	size: 32,
	fill: "#ffffff"
});
livesTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(livesTxt);
// Create score text
var scoreTxt = new Text2('Score: ' + score, {
	size: 32,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
game.down = function (x, y, obj) {
	if (game.paused) {
		return;
	}
	// Change the snake's direction to always move in the direction of the front area of the snake head which is not connected to the snake body
	if (x > snake.x && snake.direction !== 'left' && snake.direction !== 'right') {
		snake.moveHead('right');
	} else if (x < snake.x && snake.direction !== 'right' && snake.direction !== 'left') {
		snake.moveHead('left');
	} else if (y > snake.y && snake.direction !== 'up' && snake.direction !== 'down') {
		snake.moveHead('down');
	} else if (y < snake.y && snake.direction !== 'down' && snake.direction !== 'up') {
		snake.moveHead('up');
	}
};