/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Apple = Container.expand(function () {
	var self = Container.call(this);
	// Glow layer
	var glowGraphics = self.attachAsset('appleGlow', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.4
	});
	// Main apple
	var appleGraphics = self.attachAsset('apple', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Highlight
	var highlightGraphics = self.attachAsset('appleHighlight', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -8,
		y: -8,
		alpha: 0.9
	});
	// Add floating animation
	self.floatDirection = 1;
	self.baseY = 0;
	self.update = function () {
		self.y = self.baseY + Math.sin(LK.ticks * 0.05) * 3;
		glowGraphics.alpha = 0.4 + Math.sin(LK.ticks * 0.08) * 0.2;
		tween.stop(glowGraphics);
		tween(glowGraphics, {
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 1000,
			easing: tween.easeInOut
		});
		tween(glowGraphics, {
			scaleX: 1.0,
			scaleY: 1.0
		}, {
			duration: 1000,
			delay: 1000,
			easing: tween.easeInOut
		});
	};
	self.spawn = function () {
		var gridSize = 40;
		var padding = 100; // Better padding for modern mobile devices
		var maxX = Math.floor((2048 - padding * 2) / gridSize);
		var maxY = Math.floor((2732 - padding * 2) / gridSize);
		self.x = padding + Math.floor(Math.random() * maxX) * gridSize + gridSize / 2;
		self.baseY = padding + Math.floor(Math.random() * maxY) * gridSize + gridSize / 2;
		self.y = self.baseY;
		// Add spawn animation
		self.scale.set(0);
		tween(self.scale, {
			x: 1.2,
			y: 1.2
		}, {
			duration: 200,
			easing: tween.easeOut
		});
		tween(self.scale, {
			x: 1.0,
			y: 1.0
		}, {
			duration: 150,
			delay: 200,
			easing: tween.easeIn
		});
	};
	return self;
});
var Particle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add sparkle effect
	var sparkleGraphics = self.attachAsset('sparkle', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.8
	});
	self.vx = (Math.random() - 0.5) * 15;
	self.vy = (Math.random() - 0.5) * 15;
	self.life = 1.0;
	self.maxLife = 90;
	self.rotationSpeed = (Math.random() - 0.5) * 0.3;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
		self.vx *= 0.98; // Air resistance
		self.vy *= 0.98;
		self.life -= 1.0 / self.maxLife;
		self.alpha = self.life;
		self.scale.set(self.life * (1 + Math.sin(LK.ticks * 0.2) * 0.1));
		self.rotation += self.rotationSpeed;
		// Color transition from gold to white
		var colorFactor = self.life;
		sparkleGraphics.alpha = (1 - self.life) * 0.8;
		if (self.life <= 0) {
			self.destroy();
		}
	};
	return self;
});
var SnakeHead = Container.expand(function () {
	var self = Container.call(this);
	// Glow layer
	var glowGraphics = self.attachAsset('snakeHeadGlow', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.3
	});
	// Main head
	var headGraphics = self.attachAsset('snakeHead', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add pulsing glow effect
	self.glowDirection = 1;
	self.update = function () {
		glowGraphics.alpha += self.glowDirection * 0.01;
		if (glowGraphics.alpha >= 0.6) self.glowDirection = -1;
		if (glowGraphics.alpha <= 0.2) self.glowDirection = 1;
	};
	return self;
});
var SnakeSegment = Container.expand(function () {
	var self = Container.call(this);
	// Outer segment
	var segmentGraphics = self.attachAsset('snakeSegment', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Inner highlight
	var innerGraphics = self.attachAsset('snakeSegmentInner', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.8
	});
	return self;
});
var TouchIndicator = Container.expand(function () {
	var self = Container.call(this);
	var indicatorGraphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	indicatorGraphics.width = 80;
	indicatorGraphics.height = 80;
	indicatorGraphics.alpha = 0.6;
	self.visible = false;
	self.show = function (x, y) {
		self.x = x;
		self.y = y;
		self.visible = true;
		self.scale.set(0.5);
		tween(self.scale, {
			x: 1.2,
			y: 1.2
		}, {
			duration: 150,
			easing: tween.easeOut
		});
		tween(self.scale, {
			x: 1,
			y: 1
		}, {
			duration: 100,
			delay: 150,
			easing: tween.easeIn
		});
	};
	self.hide = function () {
		tween(self, {
			alpha: 0
		}, {
			duration: 200
		});
		LK.setTimeout(function () {
			self.visible = false;
			self.alpha = 0.6;
		}, 200);
	};
	return self;
});
var TrailEffect = Container.expand(function () {
	var self = Container.call(this);
	var trailGraphics = self.attachAsset('trail', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.life = 1.0;
	self.update = function () {
		self.life -= 0.02;
		self.alpha = self.life * 0.5;
		self.scale.set(self.life);
		if (self.life <= 0) {
			self.destroy();
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1B5E20
});

/**** 
* Game Code
****/ 
var gridSize = 40;
var snake = [];
var snakeDirection = {
	x: 1,
	y: 0
};
var nextDirection = {
	x: 1,
	y: 0
};
var apple = null;
var gameSpeed = 4; // Balanced modern speed
var moveCounter = 0;
var isMoving = false; // Track if snake is currently moving
var isGameRunning = true;
var particles = [];
var trails = [];
var combo = 0;
var maxCombo = 0;
var scoreTxt = new Text2('SCORE: 0', {
	size: 90,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var comboTxt = new Text2('', {
	size: 60,
	fill: 0xFFD700
});
comboTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(comboTxt);
// Initialize snake with 3 segments
function initializeSnake() {
	snake = [];
	var startX = 1024;
	var startY = 1366;
	// Create head
	var head = game.addChild(new SnakeHead());
	head.x = startX;
	head.y = startY;
	snake.push(head);
	// Create initial body segments
	for (var i = 1; i < 3; i++) {
		var segment = game.addChild(new SnakeSegment());
		segment.x = startX - i * gridSize;
		segment.y = startY;
		snake.push(segment);
	}
}
// Create apple
function createApple() {
	if (apple) {
		apple.destroy();
	}
	apple = game.addChild(new Apple());
	apple.spawn();
	// Make sure apple doesn't spawn on snake
	var appleOnSnake = true;
	var attempts = 0;
	while (appleOnSnake && attempts < 50) {
		appleOnSnake = false;
		for (var i = 0; i < snake.length; i++) {
			if (Math.abs(apple.x - snake[i].x) < gridSize && Math.abs(apple.y - snake[i].y) < gridSize) {
				appleOnSnake = true;
				apple.spawn();
				break;
			}
		}
		attempts++;
	}
}
// Move snake
function moveSnake() {
	if (!isGameRunning || isMoving) {
		return;
	}
	isMoving = true;
	snakeDirection.x = nextDirection.x;
	snakeDirection.y = nextDirection.y;
	var head = snake[0];
	var newX = head.x + snakeDirection.x * gridSize;
	var newY = head.y + snakeDirection.y * gridSize;
	// Check wall collisions
	if (newX < 50 || newX > 1998 || newY < 50 || newY > 2682) {
		combo = 0; // Reset combo on collision
		isMoving = false;
		gameOver();
		return;
	}
	// Check self collision
	for (var i = 1; i < snake.length; i++) {
		if (Math.abs(newX - snake[i].x) < gridSize && Math.abs(newY - snake[i].y) < gridSize) {
			combo = 0; // Reset combo on collision
			isMoving = false;
			gameOver();
			return;
		}
	}
	// Check apple collision
	var ateApple = false;
	if (apple && Math.abs(newX - apple.x) < gridSize && Math.abs(newY - apple.y) < gridSize) {
		ateApple = true;
		combo++;
		var scoreBonus = Math.max(1, Math.floor(combo / 3));
		LK.setScore(LK.getScore() + scoreBonus);
		scoreTxt.setText('SCORE: ' + LK.getScore());
		if (combo > maxCombo) {
			maxCombo = combo;
		}
		if (combo > 2) {
			comboTxt.setText('COMBO x' + combo);
			tween(comboTxt, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 200,
				easing: tween.easeOut
			});
			tween(comboTxt, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 200,
				delay: 200,
				easing: tween.easeIn
			});
		} else {
			comboTxt.setText('');
		}
		// Create eating particles
		for (var p = 0; p < 8; p++) {
			var particle = game.addChild(new Particle());
			particle.x = apple.x;
			particle.y = apple.y;
			particles.push(particle);
		}
		// Screen shake effect
		tween(game, {
			x: 5
		}, {
			duration: 50
		});
		tween(game, {
			x: -5
		}, {
			duration: 50,
			delay: 50
		});
		tween(game, {
			x: 0
		}, {
			duration: 50,
			delay: 100
		});
		LK.getSound('eat').play();
		createApple();
	}
	// Store old positions for smooth animation
	var oldPositions = [];
	for (var i = 0; i < snake.length; i++) {
		oldPositions[i] = {
			x: snake[i].x,
			y: snake[i].y
		};
	}
	// Move all segments
	if (!ateApple) {
		// Remove tail if not growing
		var tail = snake.pop();
		tail.destroy();
	}
	// Add new head
	var newHead = game.addChild(new SnakeHead());
	newHead.x = head.x; // Start at current position
	newHead.y = head.y;
	snake.unshift(newHead);
	// Convert old head to body segment
	if (snake.length > 1) {
		var oldHead = snake[1];
		var newSegment = game.addChild(new SnakeSegment());
		newSegment.x = oldHead.x;
		newSegment.y = oldHead.y;
		snake[1] = newSegment;
		oldHead.destroy();
	}
	// Animate movement smoothly
	var animationDuration = 120; // Smooth modern animation
	tween(snake[0], {
		x: newX,
		y: newY
	}, {
		duration: animationDuration,
		easing: tween.easeOut
	});
	// Animate body segments to follow with slight delay for more natural movement
	for (var i = 1; i < snake.length; i++) {
		if (i < oldPositions.length) {
			tween(snake[i], {
				x: oldPositions[i - 1].x,
				y: oldPositions[i - 1].y
			}, {
				duration: animationDuration,
				easing: tween.easeOut
			});
		}
	}
	// Reset movement flag after animation completes
	LK.setTimeout(function () {
		isMoving = false;
	}, animationDuration);
}
function gameOver() {
	isGameRunning = false;
	LK.getSound('gameOver').play();
	LK.showGameOver();
}
// Touch controls
var touchStartX = 0;
var touchStartY = 0;
var minSwipeDistance = 50; // Increased for better swipe detection
var touchIndicator = game.addChild(new TouchIndicator());
var lastTouchTime = 0;
var doubleTapDelay = 300; // Milliseconds for double tap detection
game.down = function (x, y, obj) {
	touchStartX = x;
	touchStartY = y;
	// Show touch indicator at touch position
	touchIndicator.show(x, y);
};
game.up = function (x, y, obj) {
	// Hide touch indicator
	touchIndicator.hide();
	if (!isGameRunning) {
		return;
	}
	var currentTime = Date.now();
	var deltaX = x - touchStartX;
	var deltaY = y - touchStartY;
	var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
	// Check for double tap (faster speed boost)
	if (distance < minSwipeDistance && currentTime - lastTouchTime < doubleTapDelay) {
		// Double tap detected - temporary speed boost
		if (gameSpeed > 2) {
			var originalSpeed = gameSpeed;
			gameSpeed = 2;
			// Flash effect to show speed boost
			tween(game, {
				tint: 0xFFFF00
			}, {
				duration: 100
			});
			tween(game, {
				tint: 0xFFFFFF
			}, {
				duration: 100,
				delay: 100
			});
			// Reset speed after 3 seconds
			LK.setTimeout(function () {
				gameSpeed = originalSpeed;
			}, 3000);
		}
		lastTouchTime = currentTime;
		return;
	}
	// Handle single tap for direction change
	if (distance < minSwipeDistance) {
		// Enhanced tap controls - turn 90 degrees clockwise or counterclockwise based on tap position
		var screenCenterX = 1024;
		if (x > screenCenterX) {
			// Right side tap - turn clockwise
			if (snakeDirection.x === 1) {
				// Moving right, turn down
				nextDirection = {
					x: 0,
					y: 1
				};
			} else if (snakeDirection.x === -1) {
				// Moving left, turn up  
				nextDirection = {
					x: 0,
					y: -1
				};
			} else if (snakeDirection.y === 1) {
				// Moving down, turn left
				nextDirection = {
					x: -1,
					y: 0
				};
			} else if (snakeDirection.y === -1) {
				// Moving up, turn right
				nextDirection = {
					x: 1,
					y: 0
				};
			}
		} else {
			// Left side tap - turn counterclockwise
			if (snakeDirection.x === 1) {
				// Moving right, turn up
				nextDirection = {
					x: 0,
					y: -1
				};
			} else if (snakeDirection.x === -1) {
				// Moving left, turn down
				nextDirection = {
					x: 0,
					y: 1
				};
			} else if (snakeDirection.y === 1) {
				// Moving down, turn right
				nextDirection = {
					x: 1,
					y: 0
				};
			} else if (snakeDirection.y === -1) {
				// Moving up, turn left
				nextDirection = {
					x: -1,
					y: 0
				};
			}
		}
		lastTouchTime = currentTime;
		return;
	}
	// Enhanced swipe detection with better sensitivity
	var absDeltaX = Math.abs(deltaX);
	var absDeltaY = Math.abs(deltaY);
	// Require minimum distance and clear directional preference
	if (distance >= minSwipeDistance) {
		if (absDeltaX > absDeltaY * 1.5) {
			// Strong horizontal swipe
			if (deltaX > 0 && snakeDirection.x === 0) {
				// Swipe right
				nextDirection = {
					x: 1,
					y: 0
				};
				// Visual feedback for swipe
				tween(touchIndicator, {
					x: touchIndicator.x + 50
				}, {
					duration: 200
				});
			} else if (deltaX < 0 && snakeDirection.x === 0) {
				// Swipe left
				nextDirection = {
					x: -1,
					y: 0
				};
				// Visual feedback for swipe
				tween(touchIndicator, {
					x: touchIndicator.x - 50
				}, {
					duration: 200
				});
			}
		} else if (absDeltaY > absDeltaX * 1.5) {
			// Strong vertical swipe
			if (deltaY > 0 && snakeDirection.y === 0) {
				// Swipe down
				nextDirection = {
					x: 0,
					y: 1
				};
				// Visual feedback for swipe
				tween(touchIndicator, {
					y: touchIndicator.y + 50
				}, {
					duration: 200
				});
			} else if (deltaY < 0 && snakeDirection.y === 0) {
				// Swipe up
				nextDirection = {
					x: 0,
					y: -1
				};
				// Visual feedback for swipe
				tween(touchIndicator, {
					y: touchIndicator.y - 50
				}, {
					duration: 200
				});
			}
		}
	}
};
// Initialize game
initializeSnake();
createApple();
// Add trail creation function
function createTrail(x, y) {
	var trail = game.addChild(new TrailEffect());
	trail.x = x;
	trail.y = y;
	trails.push(trail);
}
// Game update loop
game.update = function () {
	if (!isGameRunning) {
		return;
	}
	// Update particles
	for (var p = particles.length - 1; p >= 0; p--) {
		var particle = particles[p];
		if (particle.destroyed) {
			particles.splice(p, 1);
		}
	}
	// Update trails
	for (var t = trails.length - 1; t >= 0; t--) {
		var trail = trails[t];
		if (trail.destroyed) {
			trails.splice(t, 1);
		}
	}
	// Create trail behind snake head
	if (snake.length > 0 && LK.ticks % 3 === 0) {
		createTrail(snake[0].x, snake[0].y);
	}
	moveCounter++;
	if (moveCounter >= gameSpeed && !isMoving) {
		moveCounter = 0;
		moveSnake();
	}
};