var score = 0;
var elves = 0;
var availableGiftsCounter = 0;
var WorkingElf = Container.expand(function () {
	var self = Container.call(this);
	var elfGraphics = self.createAsset('workingElf1', 'Working Elf Graphics', .5, .5);
	self.speed = 3;
	self.move = function () {
		if (self.startFromLeft) {
			self.x += self.speed;
		} else {
			self.x -= self.speed;
			self.scale.x = -1;
		}
	};
});
var ElfGift = Container.expand(function () {
	var self = Container.call(this);
	var elfGiftGraphics = self.createAsset('elfGift', 'Elf Gift Graphics', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var Gift = Container.expand(function () {
	var self = Container.call(this);
	var giftGraphics = self.createAsset('gift', 'Gift Graphics', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var HireElfButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.createAsset('hireElf', 'Hire Elf Button', 0.5, 0.5);
	buttonGraphics.scale.set(2);
	buttonGraphics.tint = 0xffff00;
	self.on('down', function () {
		var elfCost = Math.pow(2, elves) * 5;
		if (score >= elfCost) {
			score -= elfCost;
			elves += 1;
		}
	});
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Background Image', 0, 0);
	background.scale.set(2, 3);
	self.addChildAt(background, 0);
	var giftWrapper = self.createAsset('giftWrapper', 'Big central button', 0.5, 0.5);
	giftWrapper.scale.set(5);
	giftWrapper.x = 2048 / 2;
	giftWrapper.y = 2732 / 2;
	giftWrapper.on('down', function () {
		clickCount++;
		score++;
		availableGiftsCounter++;
		giftWrapper.scale.set(4.5);
		LK.setTimeout(function () {
			giftWrapper.scale.set(5);
		}, 300);
	});
	var gifts = [];
	var workingElves = [];
	var giftsPerSecond = 0;
	var clickCount = 0;
	var startTime = Date.now();
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	var elvesTxt = new Text2('0', {
		size: 100,
		fill: "#ffffff"
	});
	var giftsPerSecondTxt = new Text2('0', {
		size: 50,
		fill: "#ffffff"
	});
	var hireElfButton = self.addChild(new HireElfButton());
	var elfCostTxt = new Text2('5G', {
		size: 50,
		fill: "#ffffff"
	});
	elfCostTxt.anchor.set(0.5, 0);
	hireElfButton.x = 2048 - hireElfButton.width / 2 - 40;
	hireElfButton.y = hireElfButton.height / 2 + 40;
	elfCostTxt.x = 1340;
	elfCostTxt.y = 175;
	LK.gui.addChild(elfCostTxt);
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	LK.gui.topCenter.addChild(elvesTxt);
	elvesTxt.x = scoreTxt.x + 460;
	elvesTxt.y = scoreTxt.y + 40;
	LK.gui.topLeft.addChild(giftsPerSecondTxt);
	giftsPerSecondTxt.anchor.set(0, -1);
	var giftSpawnTimer = LK.setInterval(function () {
		if (elves > 0) {
			score += elves;
			var newElfGift = new ElfGift();
			newElfGift.x = Math.random() * 2048;
			newElfGift.y = 0;
			gifts.push(newElfGift);
			self.addChild(newElfGift);
			if (workingElves.length < elves) {
				var workingElf = new WorkingElf();
				workingElf.startFromLeft = false;
				workingElf.x = workingElf.startFromLeft ? -workingElf.width : 2048 + workingElf.width;
				workingElf.y = Math.random() * (2732 - workingElf.height);
				workingElves.push(workingElf);
				self.addChild(workingElf);
			}
		}
		if (availableGiftsCounter > 0) {
			availableGiftsCounter--;
			giftWrapper.destroy();
			hireElfButton.destroy();
			var newGift = new Gift();
			newGift.x = Math.random() * 2048;
			newGift.y = 0;
			gifts.push(newGift);
			self.addChild(newGift);
			self.addChild(giftWrapper);
			self.addChild(hireElfButton);
		}
	}, 1000);
	LK.on('tick', function () {
		var currentTime = Date.now();
		var elapsedTime = (currentTime - startTime) / 1000;
		giftsPerSecond = (clickCount + elves * elapsedTime) / elapsedTime;
		for (var a = gifts.length - 1; a >= 0; a--) {
			gifts[a].move();
			if (gifts[a].y > 2732 + gifts[a].height) {
				gifts[a].destroy();
				gifts.splice(a, 1);
			}
		}
		for (var e = workingElves.length - 1; e >= 0; e--) {
			workingElves[e].move();
			if (workingElves[e].startFromLeft && workingElves[e].x > 2048 + workingElves[e].width || !workingElves[e].startFromLeft && workingElves[e].x < -200) {
				workingElves[e].destroy();
				workingElves.splice(e, 1);
			}
		}
		scoreTxt.setText(score + 'G');
		elvesTxt.setText(elves);
		var elfCost = Math.pow(2, elves) * 5;
		elfCostTxt.setText(elfCost + 'G');
		hireElfButton.alpha = score < elfCost ? 0.5 : 1;
		hireElfButton.interactive = score >= elfCost;
		giftsPerSecondTxt.setText('Gifts/sec: ' + Math.round(giftsPerSecond));
	});
	stage.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		for (var a = gifts.length - 1; a >= 0; a--) {
			if (gifts[a].intersects({
				x: pos.x,
				y: pos.y,
				width: 1,
				height: 1
			})) {
				clickCount++;
				gifts[a].destroy();
				gifts.splice(a, 1);
				score++;
			}
		}
	});
});