var SpecialObject = Container.expand(function () {
	var self = Container.call(this);
	var specialObjectGraphics = self.createAsset('specialObject', 'Special Object', .5, .5);
	specialObjectGraphics.scale.x *= 4;
	self.speed = 0.5;
	self.move = function () {
		self.y += self.speed;
	};
});
var GraySquare = Container.expand(function () {
	var self = Container.call(this);
	var graySquareGraphics = self.createAsset('graySquare', 'Gray Square', .5, .5);
	graySquareGraphics.width = 150;
	graySquareGraphics.height = 150;
	graySquareGraphics.tint = 0x808080;
});
var GreenPowerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.createAsset('greenPowerup', 'Green Powerup', .5, .5);
	self.amplitude = 10;
	self.frequency = 0.05;
	self.baseY = self.y;
	self.move = function () {
		self.y = self.baseY + self.amplitude * Math.sin(LK.ticks * self.frequency);
	};
});
var BloodSplatter = Container.expand(function () {
	var self = Container.call(this);
	var scale = (0.5 + Math.random() * 0.5) * 2.5;
	var splatterGraphics = self.createAsset('bloodSplatter', 'Blood splatter effect', .5, .5);
	splatterGraphics.scale.set(scale, scale);
	self.lifeSpan = 500;
	self.on('tick', function () {
		self.lifeSpan -= 16.6667;
		if (self.lifeSpan <= 0) {
			LK.setTimeout(function () {
				self.destroy();
			}, 3000);
		}
	});
});
var Santa = Container.expand(function () {
	var self = Container.call(this);
	var santaGraphics = self.createAsset('santa', 'Santa character', .5, .5);
	santaGraphics.rotation = -Math.PI / 2;
	self.direction = 1;
	self.speed = 15;
	self.move = function () {
		if (self.x >= 2048 - this.width / 2 || self.x <= this.width / 2) {
			self.direction *= -1;
		}
		self.x += self.speed * self.direction;
	};
	self.fire = function () {
		this.direction *= -1;
	};
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var scale = 0.5 + Math.random() * 0.5;
	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', .5, .5);
	bulletGraphics.scale.set(scale, scale);
	self.speed = 20;
	self.move = function () {
		self.y -= self.speed;
	};
});
var YellowEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('yellowEnemy', 'Yellow Enemy character', .5, .5);
	self.speed = 3;
	self.move = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
var BlueEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('blueEnemy', 'Blue Enemy character', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
var RedEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('redEnemy', 'Red Enemy character', .5, .5);
	self.speed = 8;
	self.move = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Game background', 0, 0);
	background.width = 2048;
	background.height = 2732;
	self.addChildAt(background, 0);
	var santa = self.addChild(new Santa());
	var greenPowerup;
	var greenPowerupSpawnTimer;
	var score = 0;
	var specialObject;
	var specialObjectSpawned = false;
	var scoreTxt = new Text2(score.toString(), {
		size: 100,
		fill: "#ffffff"
	});
	scoreTxt.y += 94;
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	var remainingBulletsTxt = new Text2('Bullets: 4', {
		size: 70,
		fill: "#ffffff"
	});
	remainingBulletsTxt.y = scoreTxt.height + 114;
	remainingBulletsTxt.anchor.set(0.5, 0);
	LK.gui.topCenter.addChild(remainingBulletsTxt);
	var bullets = [];
	var enemies = [];
	santa.x = 2048 / 2;
	santa.y = 2732 - santa.height;
	var spawnEnemy = function () {
		var enemyType = Math.random();
		var enemy;
		if (enemyType < 0.33) {
			enemy = new YellowEnemy();
		} else if (enemyType < 0.66) {
			enemy = new BlueEnemy();
		} else {
			enemy = new RedEnemy();
		}
		enemy.x = Math.random() * 2048;
		enemy.y = 0;
		enemies.push(enemy);
		if (specialObject && specialObject.parent === self) {
			self.addChildAt(enemy, self.getChildIndex(specialObject));
		} else {
			if (specialObject && specialObject.parent === self) {
				self.addChildAt(enemy, self.getChildIndex(specialObject) - 1);
			} else {
				self.addChild(enemy);
			}
		}
	};
	var fireBullet = function () {
		if (bullets.length < 4) {
			santa.fire();
			var bullet = new Bullet();
			bullet.x = santa.x;
			bullet.y = santa.y - santa.height / 2 - bullet.height / 2;
			var graySquare = new GraySquare();
			graySquare.x = bullet.x;
			graySquare.y = bullet.y + 50;
			self.addChild(graySquare);
			LK.setTimeout(function () {
				graySquare.destroy();
			}, 500);
			bullets.push(bullet);
			self.addChild(bullet);
			bullet.move();
			remainingBulletsTxt.setText('Bullets: ' + (4 - bullets.length).toString());
		}
	};
	stage.on('down', function (obj) {
		fireBullet();
	});
	LK.on('tick', function () {
		santa.move();
		bullets.forEach(function (bullet, bulletIndex) {
			bullet.move();
			if (bullet.y < -bullet.height) {
				bullet.destroy();
				bullets.splice(bulletIndex, 1);
				remainingBulletsTxt.setText('Bullets: ' + (4 - bullets.length).toString());
				return;
			}
			enemies.forEach(function (enemy, enemyIndex) {
				if (bullet.intersects(enemy)) {
					bullet.destroy();
					var splatter = new BloodSplatter();
					splatter.x = enemy.x;
					splatter.y = enemy.y;
					self.addChild(splatter);
					enemy.destroy();
					enemies.forEach(function (e) {
						e.speed *= 1.1;
					});
					score += 1;
					if (score >= 13 && !specialObjectSpawned) {
						specialObject = new SpecialObject();
						specialObject.x = 2048 / 2;
						specialObject.y = -1300;
						self.addChild(specialObject);
						specialObjectSpawned = true;
					}
					scoreTxt.setText(score.toString());
					santa.speed += 1;
					bullets.splice(bulletIndex, 1);
					enemies.splice(enemyIndex, 1);
					remainingBulletsTxt.setText('Bullets: ' + (4 - bullets.length).toString());
				} else if (greenPowerup && bullet.intersects(greenPowerup)) {
					bullets.splice(bulletIndex, 1);
					bullet.destroy();
					enemies.forEach(function (e) {
						var splatter = new BloodSplatter();
						splatter.x = e.x;
						splatter.y = e.y;
						self.addChild(splatter);
						e.destroy();
						score += 1;
					});
					enemies.length = 0;
					greenPowerup.destroy();
					LK.effects.flashScreen(0xFFA500, 1000);
					greenPowerup = undefined;
					scoreTxt.setText(score.toString());
					remainingBulletsTxt.setText('Bullets: ' + (4 - bullets.length).toString());
				}
			});
		});
		if (specialObject) {
			specialObject.move();
			if (santa.intersects(specialObject)) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				isGameOver = true;
			}
		}
		enemies.forEach(function (enemy) {
			enemy.move();
			if (santa.intersects(enemy)) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				isGameOver = true;
			}
		});
	});
	var enemySpawnTimer = LK.setInterval(spawnEnemy, 1000);
	greenPowerupSpawnTimer = LK.setInterval(function () {
		if (greenPowerup && !greenPowerup.isDestroyed) {
			return;
		}
		greenPowerup = new GreenPowerup();
		var centerX = 2048 / 2;
		var centerY = 2732 / 2;
		var randomOffsetX = (Math.random() - 0.5) * 1200;
		var randomOffsetY = (Math.random() - 0.5) * 1200;
		greenPowerup.x = centerX + randomOffsetX - greenPowerup.width / 2;
		greenPowerup.y = centerY + randomOffsetY - greenPowerup.height / 2;
		greenPowerup.move = function () {
			this.angle += 0.05;
			this.x = this.center.x + this.radius * Math.cos(this.angle);
			this.y = this.center.y + this.radius * Math.sin(this.angle);
		};
		self.addChild(greenPowerup);
	}, 10000);
});