/**** 
* Classes
****/
var Acorn = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('acorn', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.blinking = false;
	self.blink = function () {
		self.blinking = !self.blinking;
		self.alpha = self.blinking ? 0.5 : 1;
	};
	LK.setInterval(self.blink, 500);
	self.update = function () {
		self.y += platformSpeed;
		if (self.y > 2732) {
			self.y = -self.height;
			self.x = Math.random() * 2048;
		}
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lastPlatform = -1;
	self.speedY = 0;
	self.gravity = 0.5;
	self.jumpForce = -25;
	self.jump = function () {
		self.speedY = self.jumpForce;
		self.onPlatform = false;
	};
	self.update = function () {
		self.y += self.speedY;
		self.speedY += self.gravity;
		// Prevent hero from falling below the ground
		if (self.y > 2732 - 25) {
			self.y = 2732 - 25;
			self.speedY = 0;
		}
		// Make the player land on platforms
		for (var i = 0; i < obstacles.length; i++) {
			if (self.intersects(obstacles[i])) {
				if (self.y < obstacles[i].y) {
					self.y = obstacles[i].y - obstacles[i].height / 2 - self.height / 2;
					self.speedY = 0;
					self.onPlatform = true;
				} else {
					self.onPlatform = false;
				}
				if (self.y > obstacles[i].y) {
					self.speedY = 10;
				}
			}
		}
	};
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	self.update = function () {
		self.y += platformSpeed;
	};
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});
var TreeTrunk = Container.expand(function () {
	var self = Container.call(this);
	self.attachAsset('treeTrunk', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.update = function () {
		self.y += platformSpeed;
		if (self.y >= 2732) {
			self.y = 0;
		}
	};
});

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

/**** 
* Game Code
****/
// Create static platforms
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
game.on('move', function (obj) {
	var pos = obj.event.getLocalPosition(game);
	hero.x = pos.x;
});
var obstacles = [];
var nbPlatform = 10;
var gap = 2732 / (nbPlatform - 2);
var platformSpeed = 1;
var treeTrunk1 = game.addChild(new TreeTrunk());
treeTrunk1.x = 2048 / 2;
treeTrunk1.y = 0;
var treeTrunk2 = game.addChild(new TreeTrunk());
treeTrunk2.x = 2048 / 2;
treeTrunk2.y = -treeTrunk2.height;
for (var i = 0; i < nbPlatform; i++) {
	var platform = new Obstacle();
	if (i < 2) {
		platform.width = 2732;
		platform.x = 2048 / 2;
	} else {
		platform.width = (Math.random() * (0.3 - 0.1) + 0.1) * 2048;
		platform.x = Math.random() * (2048 - platform.width);
	}
	platform.y = 2732 - i * gap;
	platform.height = 40;
	obstacles.push(game.addChild(platform));
}
var lastPlatformSpawned = nbPlatform - 1;
var hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 / 2;
var acorn = game.addChild(new Acorn());
acorn.x = Math.random() * 2048;
acorn.y = -acorn.height;
// Handle touch to make the hero jump
game.on('down', function () {
	if (hero.onPlatform) {
		hero.jump();
	}
});
LK.on('tick', function () {
	hero.update();
	acorn.update();
	if (hero.intersects(acorn)) {
		LK.setScore(LK.getScore() + 1);
		scoreTxt.setText(LK.getScore());
		acorn.y = -acorn.height;
		acorn.x = Math.random() * 2048;
	}
	// Game tick
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].update();
		if (obstacles[i].y > 2732) {
			obstacles[i].y = obstacles[lastPlatformSpawned].height - gap;
			obstacles[i].x = Math.random() * (2048 - obstacles[i].width);
			obstacles[i].width = (Math.random() * (0.3 - 0.1) + 0.1) * 2048;
			platformSpeed += 0.1;
			lastPlatformSpawned = i;
			for (var i = 0; i < obstacles.length; i++) {
				obstacles[i].speedY = platformSpeed;
			}
		}
	}
	treeTrunk1.update();
	treeTrunk2.update();
	// Game over when hero touches bottom of the screen
	if (hero.y >= 2732 - hero.height) {
		LK.showGameOver();
	}
});