var Cloud = Container.expand(function () {
	var self = Container.call(this);
	var cloudGraphics = self.createAsset('cloud', 'Cloud asset', 0.5, 0.5);
	cloudGraphics.alpha = 0.7;
	self.speed = -0.2;
	self.move = function () {
		self.x += self.speed;
		if (self.x <= -self.width) {
			self.x = 2048 + self.width;
		}
	};
});
var SecondBackground = Container.expand(function () {
	var self = Container.call(this);
	var bg1 = self.createAsset('second_background', 'Game Second Background', 0, 0);
	var bg2 = self.createAsset('second_background', 'Game Second Background', 0, 0);
	bg1.width = bg2.width = 2048;
	bg1.height = bg2.height = 2732;
	bg2.x = 2048;
	self.addChild(bg1);
	self.addChild(bg2);
	self.move = function () {
		bg1.x += 0.5;
		bg2.x += 0.5;
		if (bg1.x >= 2048) bg1.x = bg2.x - 2048;
		if (bg2.x >= 2048) bg2.x = bg1.x - 2048;
	};
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.createAsset('obstacle', 'Obstacle', .5, .5);
	self.baseSpeed = -5;
	self.speedIncrease = 0;
	self.move = function () {
		self.x += self.baseSpeed - self.speedIncrease;
		self.y += Math.sin(LK.ticks / 60) * 1;
	};
});
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Hero Bullet', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero character', .5, .5);
	var wingGraphics = self.createAsset('wing', 'Hero Wing', .7, .8);
	wingGraphics.direction = 1;
	self.speed = 0;
	self.bullets = [];
	self.gravity = 0.2;
	self.jump = function () {
		self.speed = -10;
	};
	self.update = function () {
		self.speed += self.gravity;
		self.y += self.speed;
		self.rotation = self.speed * 0.05;
		wingGraphics.y += wingGraphics.direction * 2 || -2;
		if (wingGraphics.y > 10 || wingGraphics.y < -10) {
			wingGraphics.direction = -wingGraphics.direction;
		}
		for (var i = self.bullets.length - 1; i >= 0; i--) {
			self.bullets[i].move();
			if (self.bullets[i].y > 2732) {
				self.bullets[i].destroy();
				self.bullets.splice(i, 1);
			}
		}
	};
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	self.isHit = false;
	var enemyAssetIds = ['enemy1', 'enemy2', 'enemy3'];
	var selectedAssetId = enemyAssetIds[Math.floor(Math.random() * enemyAssetIds.length)];
	var enemyGraphics = self.createAsset(selectedAssetId, 'Enemy', .5, .5);
	self.speedX = -1.8 * (1 + Math.random() * 0.5) * 1.5;
	self.speedY = 0;
	self.verticalMovementRange = 50;
	self.verticalSpeed = self.verticalMovementRange / (5 * 60);
	self.verticalDirection = 1;
	self.initialY = 0;
	self.move = function () {
		self.x += self.isHit ? self.speedX * 4 : self.speedX;
		if (self.initialY === 0) self.initialY = self.y + 20;
		self.y += self.verticalSpeed * self.verticalDirection;
		if (Math.abs(self.y - self.initialY) >= self.verticalMovementRange) {
			self.verticalDirection *= -1;
		}
	};
});
var Background = Container.expand(function () {
	var self = Container.call(this);
	var bg1 = self.createAsset('background', 'Game Background 1', 0, 0);
	var bg2 = self.createAsset('background', 'Game Background 2', 0, 0);
	var dimOverlay = new Container();
	var dimGraphics = dimOverlay.createAsset('dimOverlay', 'Dim Overlay', 0, 0);
	dimGraphics.width = 2048;
	dimGraphics.height = 2732;
	dimGraphics.alpha = 0.3;
	bg1.width = bg2.width = 2048;
	bg1.height = bg2.height = 2732;
	bg2.x = 2048;
	self.addChild(bg1);
	self.addChild(bg2);
	self.addChild(dimOverlay);
	self.move = function () {
		bg1.x -= 1;
		bg2.x -= 1;
		if (bg1.x <= -2048) bg1.x = bg2.x + 2048;
		if (bg2.x <= -2048) bg2.x = bg1.x + 2048;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var secondBackground = self.addChild(new SecondBackground());
	var clouds = [];
	for (var i = 0; i < 5; i++) {
		var cloud = new Cloud();
		cloud.x = Math.random() * 2048;
		cloud.y = Math.random() * 2732 * 0.3;
		var randomScale = 0.5 + Math.random() * 0.5;
		cloud.scale.x = randomScale;
		cloud.scale.y = randomScale;
		clouds.push(cloud);
		self.addChild(cloud);
	}
	var background = self.addChild(new Background());
	self.setChildIndex(secondBackground, 0);
	var hero = self.addChild(new Hero());
	hero.x = 2048 / 2 - 200;
	hero.y = 2732 / 2;
	var obstacles = [];
	var score = 0;
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff",
		font: "Gamer",
		dropShadow: true,
		dropShadowColor: "#000000",
		dropShadowBlur: 4,
		dropShadowAngle: Math.PI / 6,
		dropShadowDistance: 6
	});
	LK.gui.topCenter.addChild(scoreTxt);
	scoreTxt.anchor.set(.5, 0);
	var isGameOver = false;
	var tickOffset = 0;
	var speedIncreaseFactor = 0;
	var obstacleSpawnInterval = 36 * 4;
	LK.on('tick', function () {
		secondBackground.move();
		clouds.forEach(function (cloud) {
			cloud.move();
		});
		background.move();
		hero.update();
		if (hero.y > 2732 || hero.y < 0) {
			isGameOver = true;
		}
		for (var i = obstacles.length - 1; i >= 0; i--) {
			obstacles[i].move();
			if (obstacles[i].x < -50) {
				obstacles[i].destroy();
				obstacles.splice(i, 1);
				scoreTxt.setText(score);
			}
			var threshold = 100;
			if (hero.intersects(obstacles[i], threshold)) {
				isGameOver = true;
			} else {
				for (var j = hero.bullets.length - 1; j >= 0; j--) {
					if (hero.bullets[j].intersects(obstacles[i])) {
						if (obstacles[i] instanceof Enemy) {
							obstacles[i].isHit = true;
							obstacles[i].addChild(hero.bullets[j]);
							hero.bullets[j].x = 0;
							hero.bullets[j].y = -250;
							hero.bullets[j].width = 100;
							hero.bullets[j].height = 100;
							if (!obstacles[i].scoreAwarded) {
								score++;
								obstacles[i].scoreAwarded = true;
							}
							scoreTxt.setText(score);
						} else {
							hero.bullets[j].destroy();
							hero.bullets.splice(j, 1);
						}
					}
				}
			}
		}
		if (tickOffset++ % obstacleSpawnInterval == 0) {
			var newObstacle = new Obstacle();
			newObstacle.x = 2048;
			newObstacle.y = Math.random() * (2732 - 500 - newObstacle.height) + newObstacle.height;
			newObstacle.speedIncrease = speedIncreaseFactor;
			obstacles.push(newObstacle);
			self.addChild(newObstacle);
		}
		if (tickOffset % 600 == 0) {
			speedIncreaseFactor += 0.5;
			obstacleSpawnInterval = Math.max(30, obstacleSpawnInterval - 15);
		}
		var enemySpawnVariance = Math.random() > 0.5 ? 1.5 : 0.5;
		if (tickOffset % Math.floor(360 * enemySpawnVariance) == 0) {
			var enemy = new Enemy();
			enemy.x = 2048;
			enemy.y = 2732 - enemy.height / 2;
			self.addChild(enemy);
			obstacles.push(enemy);
		}
		if (isGameOver) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	});
	stage.on('down', function (obj) {
		hero.jump();
		var bullet = new HeroBullet();
		bullet.x = hero.x;
		bullet.y = hero.y;
		self.addChild(bullet);
		hero.bullets.push(bullet);
	});
});