var HealthBar = Container.expand(function (maxHealth, currentHealth) {
	var self = Container.call(this);
	self.maxHealth = maxHealth;
	self.currentHealth = currentHealth;
	var background = self.createAsset('healthBarBackground', 'Health Bar Background', .5, 1);
	var foreground = self.createAsset('healthBarForeground', 'Health Bar Foreground', .5, 1);
	foreground.y -= 5;
	self.updateHealth = function (newHealth) {
		self.currentHealth = newHealth;
		var healthRatio = self.currentHealth / self.maxHealth;
		foreground.scale.x = healthRatio;
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	self.findNearestZombie = function (zombies) {
		var nearestZombie = null;
		var nearestDistance = Infinity;
		for (var i = 0; i < zombies.length; i++) {
			var dx = zombies[i].x - self.x;
			var dy = zombies[i].y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < nearestDistance) {
				nearestZombie = zombies[i];
				nearestDistance = distance;
			}
		}
		return nearestZombie;
	};
	self.targetX = 2048 / 2;
	self.targetY = 2732 / 2;
	var heroGraphics = self.createAsset('hero', 'Hero character', .4, .3);
	var initialHeroRotation = -0.0872665 - 35 * (Math.PI / 180);
	heroGraphics.rotation = initialHeroRotation;
	self.healthBar = self.addChild(new HealthBar(100, 100));
	self.healthBar.y = -125;
	self.move = function () {
		if (self.targetX !== undefined && self.targetY !== undefined) {
			var dx = self.targetX - self.x;
			var dy = self.targetY - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 5) {
				var speed = 5;
				self.x += dx / distance * speed;
				self.y += dy / distance * speed;
				var angle = Math.atan2(dy, dx);
				heroGraphics.rotation = angle + initialHeroRotation;
			} else {
				self.x = self.targetX;
				self.y = self.targetY;
			}
		}
	};
	self.shootDelay = 0;
	self.shoot = function (zombies) {
		if (self.shootDelay <= 0) {
			var nearestZombie = self.findNearestZombie(zombies);
			if (nearestZombie) {
				var bullet = new Bullet(self, nearestZombie);
				self.parent.addChild(bullet);
				self.shootDelay = 30;
				return bullet;
			}
		}
		self.shootDelay--;
		return null;
	};
});
var Zombie = Container.expand(function (hero) {
	var self = Container.call(this);
	var zombieGraphics = self.createAsset('zombie', 'Zombie character', .5, .5);
	zombieGraphics.rotation = -Math.PI / 2;
	self.target = hero;
	self.healthBar = self.addChild(new HealthBar(100, 100));
	self.healthBar.y = -125;
	self.spawn = function () {
		var side = Math.floor(Math.random() * 4);
		switch (side) {
			case 0:
				self.x = Math.random() * 2048;
				self.y = -50;
				break;
			case 1:
				self.x = 2048 + 50;
				self.y = Math.random() * 2732;
				break;
			case 2:
				self.x = Math.random() * 2048;
				self.y = 2732 + 50;
				break;
			case 3:
				self.x = -50;
				self.y = Math.random() * 2732;
				break;
		}
	};
	self.move = function () {
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			var speed = 2;
			self.x += dx / distance * speed;
			self.y += dy / distance * speed;
			var angle = Math.atan2(dy, dx);
			zombieGraphics.rotation = angle - Math.PI / 2;
		}
	};
	self.hit = function () {
		var newHealth = self.healthBar.currentHealth - 10;
		self.healthBar.updateHealth(newHealth);
		if (newHealth <= 0) return true;
	};
});
var Bullet = Container.expand(function (shooter, target) {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', .5, .5);
	self.speed = 10;
	self.x = shooter.x;
	self.y = shooter.y;
	self.target = target;
	self.hit = false;
	self.move = function () {
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 0) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
			var angle = Math.atan2(dy, dx);
			bulletGraphics.rotation = angle + Math.PI / 2;
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Game Background', .5, .5);
	background.x = 2048 / 2 - 80;
	background.y = 2732 / 2;
	background.alpha = .2;
	var hero, zombies = [], bullets = [];
	var scoreTxt, timer;
	hero = self.addChild(new Hero());
	hero.x = 2048 / 2;
	hero.y = 2732 / 2;
	scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	scoreTxt.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(scoreTxt);
	LK.on('tick', function () {
		hero.move();
		if (hero.shootDelay <= 0) {
			var newBullet = hero.shoot(zombies);
			if (newBullet) {
				bullets.push(newBullet);
			}
		}
		hero.shootDelay--;
		for (var i = 0; i < zombies.length; i++) {
			zombies[i].move();
		}
		for (var i = bullets.length - 1; i >= 0; i--) {
			bullets[i].move();
		}
		for (var i = zombies.length - 1; i >= 0; i--) {
			for (var j = bullets.length - 1; j >= 0; j--) {
				if (bullets[j].intersects(zombies[i]) && !bullets[j].hit) {
					bullets[j].hit = true;
					if (zombies[i].hit()) {
						zombies[i].destroy();
						zombies.splice(i, 1);
					}
					bullets[j].destroy();
					bullets.splice(j, 1);
				}
			}
		}
		if (isGameOver()) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	});
	stage.on('down', function (obj) {
		var pos = obj.event.getLocalPosition(self);
		hero.targetX = pos.x;
		hero.targetY = pos.y;
	});
	timer = LK.setInterval(function () {
		var zombie = new Zombie(hero);
		zombie.spawn();
		zombies.push(zombie);
		self.addChild(zombie);
	}, 2000);
	function isGameOver() {}
});