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

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Game configuration
var segmentLength = 40,
	startingSegments = 10,
	spawn = {
		x: 1024,
		y: 1366
	},
	snakeSpeed = 2000,
	baseSnakeSpeed = 2,
	speedIncrement = 2000,
	maxApples = 3,
	appleLife = 300,
	segmentsPerApple = 2,
	snakeWidth = 30,
	appleWidth = 25,
	cursorSize = 20,
	snake,
	target,
	apples,
	score,
	gameState,
	deathMeans,
	smoothMovement = true,
	movementQueue = [];
function distance(p1, p2) {
	var dx = p2.x - p1.x;
	var dy = p2.y - p1.y;
	return Math.sqrt(dx * dx + dy * dy);
}
function lineIntersect(p0_x, p0_y, p1_x, p1_y, p2_x, p2_y, p3_x, p3_y) {
	var s1_x = p1_x - p0_x,
		s1_y = p1_y - p0_y,
		s2_x = p3_x - p2_x,
		s2_y = p3_y - p2_y,
		s = (-s1_y * (p0_x - p2_x) + s1_x * (p0_y - p2_y)) / (-s2_x * s1_y + s1_x * s2_y),
		t = (s2_x * (p0_y - p2_y) - s2_y * (p0_x - p2_x)) / (-s2_x * s1_y + s1_x * s2_y);
	if (s >= 0 && s <= 1 && t >= 0 && t <= 1) {
		return true;
	}
	return false;
}
function SGM(angle, x, y) {
	this.x = x || 0;
	this.y = y || 0;
	this.angle = angle || 0;
	this.parent = null;
}
;
SGM.prototype.endX = function () {
	return this.x + Math.cos(this.angle) * segmentLength;
};
SGM.prototype.endY = function () {
	return this.y + Math.sin(this.angle) * segmentLength;
};
SGM.prototype.pointAt = function (x, y) {
	var dx = x - this.x,
		dy = y - this.y;
	this.angle = Math.atan2(dy, dx);
};
SGM.prototype.target = function (x, y) {
	this.targetX = x;
	this.targetY = y;
	this.arrived = false;
	this.totalDist = distance({
		x: this.endX(),
		y: this.endY()
	}, {
		x: this.targetX,
		y: this.targetY
	});
	this.currentDist = parseInt(this.totalDist);
};
SGM.prototype.gotoTarget = function () {
	if (!this.arrived) {
		if (this.targetX > this.x + segmentLength || this.targetX < this.x - segmentLength || this.targetY > this.y + segmentLength || this.targetY < this.y - segmentLength) {
			this.pointAt(this.targetX, this.targetY);
		} else {
			this.arrived = true;
		}
		this.currentDist = distance({
			x: this.endX(),
			y: this.endY()
		}, {
			x: this.targetX,
			y: this.targetY
		});
	}
	// Smooth movement with tweening
	if (smoothMovement) {
		var moveSpeed = snakeSpeed * 1.2; // Faster movement
		var newX = this.x + (this.endX() - this.x) / moveSpeed;
		var newY = this.y + (this.endY() - this.y) / moveSpeed;
		// Use tween for very smooth transitions
		tween(this, {
			x: newX,
			y: newY
		}, {
			duration: 15,
			easing: tween.easeOut
		});
	} else {
		this.x += (this.endX() - this.x) / snakeSpeed;
		this.y += (this.endY() - this.y) / snakeSpeed;
	}
	if (this.parent) {
		this.parent.drag(this.x, this.y);
	}
};
SGM.prototype.drag = function (x, y) {
	this.pointAt(x, y);
	var newX = x - Math.cos(this.angle) * segmentLength;
	var newY = y - Math.sin(this.angle) * segmentLength;
	if (smoothMovement) {
		// Smooth transition for body segments
		tween(this, {
			x: newX,
			y: newY
		}, {
			duration: 20,
			easing: tween.easeInOut
		});
	} else {
		this.x = newX;
		this.y = newY;
	}
	if (this.parent) {
		// Delay the parent drag slightly for smoother chain movement
		var self = this;
		LK.setTimeout(function () {
			self.parent.drag(self.x, self.y);
		}, 5);
	}
};
SGM.prototype.render = function (context) {
	context.lineTo(this.endX(), this.endY());
};
function IKR(x, y) {
	this.ix = x || 0;
	this.iy = y || 0;
	this.sgms = [];
	this.lastArm = null;
}
;
IKR.prototype.addSeg = function (angle) {
	var arm = new SGM(angle);
	if (this.lastArm !== null) {
		arm.x = this.lastArm.endX();
		arm.y = this.lastArm.endY();
		arm.parent = this.lastArm;
	} else {
		arm.x = this.ix;
		arm.y = this.iy;
	}
	this.sgms.push(arm);
	this.lastArm = arm;
};
IKR.prototype.grow = function () {
	var tail = this.sgms[0],
		arm = new SGM(tail.angle);
	arm.x = tail.x - Math.cos(tail.angle) * segmentLength;
	arm.y = tail.y - Math.sin(tail.angle) * segmentLength;
	tail.parent = arm;
	this.sgms.unshift(arm);
};
IKR.prototype.drag = function (x, y) {
	this.lastArm.drag(x, y);
};
function CUR(x, y) {
	this.x = x;
	this.y = y;
	this.rotation = 0;
}
;
CUR.prototype.render = function (context) {
	context.save();
	context.translate(this.x, this.y);
	context.rotate(this.rotation);
	context.beginPath();
	context.moveTo(0, -cursorSize);
	context.lineTo(0, -cursorSize / 2);
	context.moveTo(0, cursorSize / 2);
	context.lineTo(0, cursorSize);
	context.moveTo(-cursorSize, 0);
	context.lineTo(-cursorSize / 2, 0);
	context.moveTo(cursorSize / 2, 0);
	context.lineTo(cursorSize, 0);
	context.stroke();
	context.restore();
	this.rotation = (this.rotation + cursorSpin) % 360;
};
function Apple(x, y) {
	this.x = x;
	this.y = y;
	this.life = appleLife;
	this.rotation = 0;
}
Apple.prototype.update = function () {
	this.life--;
};
Apple.prototype.render = function (context) {
	context.beginPath();
	context.arc(this.x, this.y, appleWidth, 0, Math.PI * 2);
	context.fill();
	if (gameState !== 'dead') {
		context.save();
		context.fillStyle = 'white';
		context.font = '8px sans-serif';
		context.fillText(this.life, this.x + 10, this.y + 10);
		context.restore();
		CUR.prototype.render.call(this, context);
	}
};
function init() {
	snake = new IKR(spawn.x, spawn.y);
	cursor = new CUR(-20, -20);
	target = new CUR(spawn.x + segmentLength * (startingSegments + 5), spawn.y);
	apples = [];
	score = 0;
	snakeSpeed = baseSnakeSpeed; // Reset speed to base value
	for (var i = 0; i < startingSegments; i++) {
		snake.addSeg();
	}
	snake.lastArm.target(target.x, target.y);
	gameState = 'play';
}
init();
// Touch events handled by game object
game.down = function (x, y, obj) {
	switch (gameState) {
		case 'play':
			target.x = x;
			target.y = y;
			snake.lastArm.target(target.x, target.y);
			break;
		case 'dead':
			init();
			break;
	}
};
function badPlacement(apple) {
	for (var s = 0; s < snake.sgms.length; s++) {
		var seg = snake.sgms[s];
		if (Math.min(distance(apple, {
			x: seg.endX(),
			y: seg.endY()
		}), distance(apple, {
			x: seg.x,
			y: seg.y
		})) < appleWidth * 2) {
			return true;
		}
	}
	return false;
}
function addScoreSegments() {
	for (var i = 0; i < segmentsPerApple; i++) {
		snake.grow();
	}
	// Increase snake speed progressively
	snakeSpeed = Math.max(200, snakeSpeed + speedIncrement);
}
function update() {
	if (gameState !== 'dead') {
		snake.lastArm.gotoTarget();
		if (snake.lastArm.endX() > 2048 - 50 || snake.lastArm.endX() < 50 || snake.lastArm.endY() > 2732 - 50 || snake.lastArm.endY() < 50) {
			gameState = 'dead';
			deathMeans = 'Hit the wall!';
			LK.showGameOver();
			return;
		}
		for (var s = 0; s < snake.sgms.length - 2; s++) {
			var seg = snake.sgms[s];
			if (lineIntersect(snake.lastArm.x, snake.lastArm.y, snake.lastArm.endX(), snake.lastArm.endY(), seg.x, seg.y, seg.endX(), seg.endY())) {
				gameState = 'dead';
				deathMeans = 'You bit yourself';
				LK.showGameOver();
				return;
			}
			for (var a in apples) {
				var apple = apples[a];
				if (Math.min(distance(apple, {
					x: seg.endX(),
					y: seg.endY()
				}), distance(apple, {
					x: seg.x,
					y: seg.y
				})) < appleWidth * 2) {
					score += Math.round(apple.life / 2); // half  score if absorbed by the tail
					apples.splice(a, 1);
					addScoreSegments();
				}
			}
		}
		for (var a in apples) {
			var apple = apples[a];
			apple.update();
			if (apple.life <= 0) {
				apples.splice(a, 1);
				continue;
			}
			if (distance(apple, {
				x: snake.lastArm.endX(),
				y: snake.lastArm.endY()
			}) < appleWidth * 2) {
				score += apple.life;
				apples.splice(a, 1);
				addScoreSegments();
			}
		}
		if (apples.length < maxApples && Math.random() < 0.02) {
			var offset = appleWidth * 4,
				apple = new Apple(offset + Math.floor(Math.random() * (2048 - offset * 2)), offset + Math.floor(Math.random() * (2732 - offset * 2)));
			while (badPlacement(apple)) {
				apple.x = offset + Math.floor(Math.random() * (2048 - offset * 2));
				apple.y = offset + Math.floor(Math.random() * (2732 - offset * 2));
			}
			apples.push(apple);
			// Create visual apple
			var appleVisual = LK.getAsset('apple', {
				width: appleWidth * 2,
				height: appleWidth * 2,
				color: 0x00ff00,
				shape: 'ellipse',
				anchorX: 0.5,
				anchorY: 0.5
			});
			appleVisual.x = apple.x;
			appleVisual.y = apple.y;
			game.addChild(appleVisual);
			appleObjects.push(appleVisual);
		}
	}
}
// LK rendering system - visual elements handled by game objects
var snakeSegments = [];
var appleObjects = [];
var targetObject = null;
var scoreText = null;
// Initialize visual elements
function initVisuals() {
	// Clear existing visuals
	for (var i = 0; i < snakeSegments.length; i++) {
		snakeSegments[i].destroy();
	}
	for (var i = 0; i < appleObjects.length; i++) {
		appleObjects[i].destroy();
	}
	if (targetObject) {
		targetObject.destroy();
	}
	if (scoreText) {
		scoreText.destroy();
	}
	snakeSegments = [];
	appleObjects = [];
	// Create score text
	scoreText = new Text2('Score: 0', {
		size: 60,
		fill: 0xFFFFFF
	});
	scoreText.anchor.set(0, 0);
	LK.gui.topLeft.addChild(scoreText);
	scoreText.x = 120;
	scoreText.y = 20;
	// Create target indicator
	targetObject = LK.getAsset('target', {
		width: 30,
		height: 30,
		color: 0x0000ff,
		shape: 'ellipse',
		anchorX: 0.5,
		anchorY: 0.5
	});
	game.addChild(targetObject);
}
// Initialize the game
init();
initVisuals();
// LK game update loop
game.update = function () {
	if (gameState === 'play') {
		update();
		// Update score display
		if (scoreText) {
			scoreText.setText('Score: ' + score);
		}
		// Update target position
		if (targetObject && !snake.lastArm.arrived) {
			targetObject.x = target.x;
			targetObject.y = target.y;
			targetObject.visible = true;
		} else if (targetObject) {
			targetObject.visible = false;
		}
		// Update snake visual segments
		updateSnakeVisuals();
		// Update apple visuals
		updateAppleVisuals();
	}
};
function updateSnakeVisuals() {
	// Only update positions if we have existing segments, otherwise recreate
	if (snakeSegments.length !== snake.sgms.length + 1) {
		// Clear existing snake segments
		for (var i = 0; i < snakeSegments.length; i++) {
			snakeSegments[i].destroy();
		}
		snakeSegments = [];
		// Create new snake segments
		for (var s = 0; s < snake.sgms.length; s++) {
			var seg = snake.sgms[s];
			var segmentVisual = LK.getAsset('snakeSegment', {
				width: snakeWidth,
				height: segmentLength,
				color: 0x64ff64,
				shape: 'box',
				anchorX: 0.5,
				anchorY: 0
			});
			segmentVisual.x = seg.x;
			segmentVisual.y = seg.y;
			segmentVisual.rotation = seg.angle + Math.PI / 2;
			game.addChild(segmentVisual);
			snakeSegments.push(segmentVisual);
		}
		// Create snake head with proper sizing
		var head = LK.getAsset('snakeHead', {
			width: 60,
			height: 60,
			anchorX: 0.5,
			anchorY: 0.5
		});
		head.x = snake.lastArm.endX();
		head.y = snake.lastArm.endY();
		game.addChild(head);
		snakeSegments.push(head);
	} else {
		// Update existing segments smoothly
		for (var s = 0; s < snake.sgms.length; s++) {
			var seg = snake.sgms[s];
			var segmentVisual = snakeSegments[s];
			// Smooth visual updates with tweening
			tween(segmentVisual, {
				x: seg.x,
				y: seg.y,
				rotation: seg.angle + Math.PI / 2
			}, {
				duration: 15,
				easing: tween.easeOut
			});
		}
		// Update head smoothly
		var head = snakeSegments[snakeSegments.length - 1];
		tween(head, {
			x: snake.lastArm.endX(),
			y: snake.lastArm.endY()
		}, {
			duration: 15,
			easing: tween.easeOut
		});
	}
}
function updateAppleVisuals() {
	// Remove apples that no longer exist
	for (var i = appleObjects.length - 1; i >= 0; i--) {
		var found = false;
		for (var a = 0; a < apples.length; a++) {
			if (Math.abs(appleObjects[i].x - apples[a].x) < 5 && Math.abs(appleObjects[i].y - apples[a].y) < 5) {
				found = true;
				break;
			}
		}
		if (!found) {
			appleObjects[i].destroy();
			appleObjects.splice(i, 1);
		}
	}
}
;
;