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

/**** 
* Classes
****/ 
var Particle = Container.expand(function () {
	var self = Container.call(this);
	var particleGraphics = self.attachAsset('particle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.tint = 0xffffff * Math.random();
	self.rotation = Math.PI * 2 * Math.random();
	particleGraphics.blendMode = 1;
});

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

/**** 
* Game Code
****/ 
for (var i = 0; i < 300; i++) {
	var particle = game.addChild(new Particle());
	var angle = Math.random() * Math.PI * 2;
	var radius = Math.random() * 200;
	particle.x = 1024 + Math.cos(angle) * radius;
	particle.y = 1366 + Math.sin(angle) * radius;
	particle.scale.set(4, 4);
}
var clickMeText = new Text2('Click Me', {
	size: 150,
	fill: 0x000000,
	weight: 800
});
clickMeText.anchor.set(0.5, 0.5);
clickMeText.x = 2048 / 2;
clickMeText.y = 2732 / 2;
game.addChild(clickMeText);
// Create a grid of positions for the particles
var gridPositions = [];
var gridSize = 7;
var elementWidth = 250; // width of the particle element
for (var i = 0; i < gridSize; i++) {
	for (var j = 0; j < gridSize; j++) {
		gridPositions.push({
			x: i * elementWidth + elementWidth / 2 + (2048 - elementWidth * gridSize) / 2,
			y: j * elementWidth + elementWidth / 2 + (2732 - elementWidth * gridSize) / 2
		});
	}
}
game.down = function () {
	if (clickMeText) {
		tween(clickMeText, {
			y: -200
		}, {
			duration: 500,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				if (clickMeText) {
					clickMeText.destroy();
					clickMeText = null;
				}
			}
		});
	}
	var tweenFunctions = [tween.linear, tween.easeIn, tween.easeOut, tween.elasticIn, tween.elasticOut, tween.bounceIn, tween.bounceOut, tween.easeInOut, tween.bounceInOut, tween.elasticInOut];
	var randomTweenFunction = tweenFunctions[Math.floor(Math.random() * tweenFunctions.length)];
	var useGrid = Math.random() < .5;
	game.children.forEach(function (child, index) {
		if (child instanceof Particle) {
			var size = Math.random() * 1;
			var targetPosition;
			// Half of the time, use a grid position, half of the time use a random position
			if (useGrid) {
				targetPosition = gridPositions[index % gridPositions.length];
			} else {
				targetPosition = {
					x: Math.random() * 2048,
					y: Math.random() * 2732
				};
			}
			tween(child, {
				x: targetPosition.x,
				y: targetPosition.y,
				scaleX: size,
				scaleY: size,
				rotation: Math.random() * Math.PI * 2,
				tint: Math.random() * 0xffffff
			}, {
				duration: 1000,
				easing: randomTweenFunction
			});
		}
	});
};