var ScoreText = Container.expand(function (score, x, y) {
	var self = Container.call(this);
	self.x = x;
	self.y = y;
	var scoreText = new Text2(score.toString(), {
		size: 50,
		fill: '#ffffff',
		weight: 800,
		dropShadow: true,
		dropShadowColor: '#000000',
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 6
	});
	scoreText.anchor.set(.5, .5);
	self.addChild(scoreText);
	self.move = function () {
		self.y -= 2;
		self.alpha -= 0.02;
		if (self.alpha <= 0) self.destroy();
	};
});
var Particle = Container.expand(function (x, y, index) {
	var self = Container.call(this, x, y);
	self.index = index;
	var particleGraphics = self.createAsset('particle', 'Particle Graphic', 0.5, 0.5);
	self.x = x;
	self.y = y;
	var angle = index % 20 * (Math.PI * 2 / 20);
	self.fixedSpeed = 30;
	self.angle = angle;
	self.move = function () {
		self.fixedSpeed *= 0.95;
		self.x += Math.cos(self.angle) * self.fixedSpeed;
		self.y += Math.sin(self.angle) * self.fixedSpeed;
		self.cachedAlpha = (self.cachedAlpha || 3) - 0.04;
		self.alpha = Math.max(0, self.cachedAlpha);
		if (self.cachedAlpha <= 0) self.destroy();
	};
});
var ParallaxLayer = Container.expand(function (speed) {
	var self = Container.call(this);
	self.actualY = 0;
	self.speed = typeof speed !== 'undefined' ? speed : 1;
	self.setParallaxY = function (y) {
		self.actualY = y * self.speed;
		self.y = self.actualY;
	};
});
var Bell = Container.expand(function (score) {
	var self = Container.call(this);
	self.score = score;
	var bellBackground = self.createAsset('bellBackground', 'Bell Background', .5, .5);
	self.addChild(bellBackground);
	var bellGraphics = self.createAsset('bell', 'Christmas Bell', .5, .5);
	bellGraphics.blendMode = 1;
	self.addChild(bellGraphics);
	self.move = function () {
		self.y += self.parent.parent.bellSpeed;
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	self.targetX = self.x;
	var playerGraphics = self.createAsset('player', 'Player Character', .5, .5);
	self.hasJumped = false;
	self.jump = function () {
		if (!self.hasJumped) {
			self.speedy = -30;
			self.hasJumped = true;
		}
	};
	self.fall = function () {};
	self.update = function () {
		var distance = Math.abs(self.x - self.targetX);
		var speed = Math.max(1, distance / 25);
		if (self.x < self.targetX) {
			self.x += Math.min(speed, self.targetX - self.x);
			playerGraphics.scale.x = -1;
		} else if (self.x > self.targetX) {
			self.x -= Math.min(speed, self.x - self.targetX);
			playerGraphics.scale.x = 1;
		}
		self.y += self.speedy;
		self.speedy += 0.28;
	};
});
var Snowflake = Container.expand(function () {
	var self = Container.call(this);
	var flakeGraphics = self.createAsset('snowflake', 'Snowflake Graphic', 0.5, 0.5);
	self.speedy = Math.random() * 2 + 1;
	self.speedx = Math.random() * 1 - 0.5;
	self.rotationSpeed = Math.random() * 0.05 - 0.025;
	self.move = function () {
		self.y += self.speedy;
		self.scale.set(self.speedy / 3, self.speedy / 3);
		self.x += self.speedx;
		self.rotation += self.rotationSpeed;
		if (self.y > 2732 - self.parent.actualY) {
			self.y = -50 - self.parent.actualY;
		}
		if (self.x > 2048) {
			self.x = -50;
		} else if (self.x < -50) {
			self.x = 2048;
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.bellSpeed = 5;
	self.bellSpeedIncreaseFactor = 0.001;
	self.totalTicks = 0;
	self.layers = [];
	var background = self.createAsset('backgroundGraphics', 'Background Graphics', 0.5, 0.5);
	background.x = 2048 / 2;
	background.y = 2732 / 2;
	background.alpha = 0.5;
	self.addChildAt(background, 0);
	var mountains = self.addChild(new ParallaxLayer(.3 / 4 / 4 / 4));
	var mountainGraphics = mountains.createAsset('mountainGraphics', 'Background Element', .5, 1);
	mountainGraphics.x = 2048 / 2;
	mountainGraphics.y = 2732;
	mountains.addChild(mountainGraphics);
	self.layers.push(mountains);
	var valley = self.addChild(new ParallaxLayer(.3 / 4 / 4));
	var valleyGraphics = valley.createAsset('valleyGraphics', 'Background Element', .5, 1);
	valleyGraphics.x = 2048 / 2;
	valleyGraphics.y = 2732;
	valley.addChild(valleyGraphics);
	self.layers.push(valley);
	var forest = new ParallaxLayer(.3 / 2);
	var forestGraphics = forest.createAsset('forestGraphics', 'Background Element', .5, 1);
	forestGraphics.x = 2048 / 2;
	forestGraphics.y = 2732 - 150 + 50;
	forest.addChild(forestGraphics);
	self.layers.push(forest);
	var foreground = new ParallaxLayer();
	self.layers.push(foreground);
	self.particles = [];
	for (var i = 0; i < 100; i++) {
		var snowflake = new Snowflake();
		snowflake.x = Math.random() * 2048;
		snowflake.y = Math.random() * 2732;
		forest.addChild(snowflake);
		self.particles.push(snowflake);
	}
	var groundLayer = new ParallaxLayer(.3);
	var groundGraphics = groundLayer.createAsset('groundGraphics', 'Ground Element', .5, 1);
	groundGraphics.x = 2048 / 2;
	groundGraphics.y = 2732 + 195;
	groundLayer.addChild(groundGraphics);
	self.layers.push(groundLayer);
	self.addChild(forest);
	self.addChild(foreground);
	self.addChild(groundLayer);
	var player = foreground.addChild(new Player());
	player.x = 2048 / 2;
	player.targetX = player.x;
	player.y = 2732 - player.height - 80;
	self.score = 0;
	scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff",
		weight: 800,
		dropShadow: true,
		dropShadowColor: '#000000',
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 6
	});
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	var bells = [];
	self.addBell = function () {
		var lastBellY = bells.length > 0 ? bells[bells.length - 1].y : 2732;
		var nextScore = bells.length > 0 ? bells[bells.length - 1].score + 1 : 1;
		var bell = foreground.addChild(new Bell(nextScore));
		bell.x = Math.random() * (2048 - bell.width);
		bell.y = lastBellY - (Math.random() * (2732 / 2 - 2732 / 3) + 2732 / 3);
		bells.push(bell);
	};
	for (var i = 0; i < 5; i++) {
		self.addBell();
	}
	var player;
	var scoreTxt;
	var isGameOver = false;
	LK.on('tick', function () {
		player.update();
		var targetParallaxValue = 1366 - player.y;
		var currentParallaxValue = foreground.actualY;
		var parallaxDifference = targetParallaxValue - currentParallaxValue;
		var parallaxSpeed = Math.max(1, Math.abs(parallaxDifference) / 10);
		background.alpha = Math.min(1, (-2790 - player.y) / 500000 + 0.5);
		if (currentParallaxValue < targetParallaxValue) {
			self.layers.forEach(function (layer) {
				layer.setParallaxY(currentParallaxValue + Math.min(parallaxSpeed, targetParallaxValue - currentParallaxValue));
			});
		}
		for (var i = 0; i < bells.length; i++) {
			bells[i].move();
			if (player.intersects(bells[i])) {
				player.speedy = -25;
				player.hasJumped = true;
				self.score += bells[i].score;
				scoreTxt.setText(self.score);
				for (var p = 0; p < 20; p++) {
					var layerDeltaY = forest.actualY - foreground.actualY;
					var particle = new Particle(bells[i].x, bells[i].y - layerDeltaY, self.particles.length);
					self.particles.push(particle);
					forest.addChild(particle);
					var scoreText = new ScoreText(bells[i].score, bells[i].x, bells[i].y - layerDeltaY);
					self.particles.push(scoreText);
					forest.addChild(scoreText);
				}
				bells[i].destroy();
				bells.splice(i, 1);
				self.addBell();
			} else if (bells[i].y + foreground.actualY > 2832) {
				bells[i].destroy();
				bells.splice(i, 1);
				self.addBell();
			}
		}
		if (player.y + foreground.y > 2732) {
			isGameOver = true;
		}
		self.particles.forEach(function (particle) {
			particle.move();
			if (particle.alpha <= 0) {
				var index = self.particles.indexOf(particle);
				if (index > -1) {
					self.particles.splice(index, 1);
				}
			}
		});
		self.totalTicks++;
		self.bellSpeed += self.bellSpeedIncreaseFactor;
		if (isGameOver) {
			LK.effects.flashScreen(0xffffff, 1000);
			LK.showGameOver();
		}
	});
	stage.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		player.targetX = pos.x;
		player.jump();
	});
	stage.on('move', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		player.targetX = pos.x;
	});
});