var HealingPickup = Container.expand(function () {
	var self = Container.call(this);
	var pickupGraphics = self.createAsset('healingPickup', 'Healing Pickup', .5, .5);
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', .5, .5);
	self.speed = 20;
	self.move = function () {
		self.x += self.speed * Math.cos(self.angle);
		self.y += self.speed * Math.sin(self.angle);
		self.rotation += 0.1;
	};
});
var Enemy = Container.expand(function (hero) {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
	self.move = function () {
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 50) {
			self.x += dx / distance * 1.8;
			self.y += dy / distance * 1.8 + Math.sin(LK.ticks / 10) * 2;
		}
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero character', .5, .5);
	self.health = 100;
	self.healthBarBorder = self.createAsset('healthBarBorder', 'Health Bar Border', 0.5, 1);
	self.healthBarBorder.y = -115;
	self.healthBar = self.createAsset('healthBar', 'Health Bar', 0.5, 1);
	self.healthBar.y = -120;
	self.healthBarBorder.x = self.healthBar.x;
	self.healthBarBorder.width = self.healthBar.width + 10;
	self.healthBarBorder.height = self.healthBar.height + 10;
	self.move = function () {
		self.healthBar.scale.x = self.health / 100;
		if (self.targetPos) {
			var dx = self.targetPos.x - self.x;
			var dy = self.targetPos.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance > 5) {
				self.x += dx / distance * 10;
				self.y += dy / distance * 10;
			} else {
				self.x = self.targetPos.x;
				self.y = self.targetPos.y;
				self.targetPos = null;
			}
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var grass = self.createAsset('grass', 'Grass Background', 0, 0);
	grass.width = 2048;
	grass.height = 2732;
	self.addChild(grass);
	var hero = self.addChild(new Hero());
	var canMove = false;
	var score = 0;
	var scoreTxt = new Text2('Score: ' + score, {
		size: 150,
		fill: '#ffffff'
	});
	LK.gui.topCenter.addChild(scoreTxt);
	hero.enemies = [];
	var heroBullets = [];
	var enemyBullets = [];
	hero.x = 2048 / 2;
	hero.y = 2732 / 2;
	self.targetPos = null;
	stage.on('down', function (obj) {
		canMove = true;
		hero.targetPos = obj.event.getLocalPosition(self);
	});
	stage.on('move', function (obj) {
		hero.targetPos = obj.event.getLocalPosition(self);
	});
	var spawnEnemy = function () {
		var side = Math.floor(Math.random() * 4);
		var enemy = new Enemy(hero);
		switch (side) {
			case 0:
				enemy.x = Math.random() * 2048;
				enemy.y = 0;
				break;
			case 1:
				enemy.x = 2048;
				enemy.y = Math.random() * 2732;
				break;
			case 2:
				enemy.x = Math.random() * 2048;
				enemy.y = 2732;
				break;
			case 3:
				enemy.x = 0;
				enemy.y = Math.random() * 2732;
				break;
		}
		hero.enemies.push(enemy);
		self.addChild(enemy);
	};
	LK.on('tick', function () {
		hero.move();
		for (var i = 0; i < heroBullets.length; i++) {
			heroBullets[i].move();
			if (heroBullets[i].x < 0 || heroBullets[i].x > 2048 || heroBullets[i].y < 0 || heroBullets[i].y > 2732) {
				heroBullets[i].destroy();
				heroBullets.splice(i, 1);
				i--;
			}
		}
		for (var i = 0; i < enemyBullets.length; i++) {
			enemyBullets[i].move();
		}
		for (var i = 0; i < hero.enemies.length; i++) {
			hero.enemies[i].move();
			for (var j = 0; j < heroBullets.length; j++) {
				if (heroBullets[j].intersects(hero.enemies[i])) {
					heroBullets[j].destroy();
					heroBullets.splice(j, 1);
					hero.enemies[i].destroy();
					hero.enemies.splice(i, 1);
					score++;
					scoreTxt.setText('Score: ' + score);
					if (Math.random() < 0.1) {
						var pickup = new HealingPickup();
						pickup.x = hero.x;
						pickup.y = hero.y;
						self.addChild(pickup);
					}
					i--;
					j--;
				}
			}
			if (hero.intersects(hero.enemies[i])) {
				hero.health -= 1;
				if (hero.health <= 0) {
					LK.showGameOver();
				}
			}
		}
		for (var i = 0; i < self.children.length; i++) {
			if (self.children[i] instanceof HealingPickup && hero.intersects(self.children[i])) {
				hero.health = Math.min(100, hero.health + 10);
				self.children[i].destroy();
			}
		}
		if (LK.ticks % 30 === 0) {
			spawnEnemy();
		}
		if (LK.ticks % 20 === 0 && hero.targetPos) {
			var bullet = new Bullet();
			bullet.x = hero.x;
			bullet.y = hero.y;
			var dx = hero.targetPos.x - hero.x;
			var dy = hero.targetPos.y - hero.y;
			bullet.angle = Math.atan2(dy, dx);
			heroBullets.push(bullet);
			self.addChild(bullet);
		}
	});
});