/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -50;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Crosshair = Container.expand(function () {
	var self = Container.call(this);
	var hunter = self.attachAsset('hunter', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
var Duck = Container.expand(function () {
	var self = Container.call(this);
	var duckBody = self.attachAsset('duck', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var leftWing = self.attachAsset('duckWing', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -30,
		y: -10
	});
	var rightWing = self.attachAsset('duckWing', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 30,
		y: -10
	});
	self.speed = 12;
	self.direction = 1;
	self.wingAnimation = 0;
	self.isHit = false;
	self.update = function () {
		if (self.isHit) return;
		self.x += self.speed * self.direction;
		// Wing flapping animation
		self.wingAnimation += 0.3;
		leftWing.rotation = Math.sin(self.wingAnimation) * 0.5;
		rightWing.rotation = -Math.sin(self.wingAnimation) * 0.5;
	};
	self.hit = function () {
		if (self.isHit) return false;
		self.isHit = true;
		LK.getSound('hit').play();
		// Duck falls down when hit
		tween(self, {
			y: self.y + 200,
			rotation: Math.PI
		}, {
			duration: 800,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
		return true;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Add sky background
var skyBg = game.addChild(LK.getAsset('skyBackground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
}));
// Game variables
var crosshair;
var ducks = [];
var bullets = [];
var duckSpawnTimer = 0;
var gameScore = 0;
var difficulty = 1;
// Initialize crosshair
crosshair = game.addChild(new Crosshair());
crosshair.x = 1024;
crosshair.y = 2600;
// Initialize score display
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game controls
game.move = function (x, y, obj) {
	// Hunter is stuck in position - no movement allowed
};
game.down = function (x, y, obj) {
	// Manual shooting on touch/tap
	var bullet = new Bullet();
	bullet.x = crosshair.x;
	bullet.y = crosshair.y - 50;
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('shoot').play();
};
function spawnDuck() {
	var duck = new Duck();
	// Always spawn from left side
	duck.x = -100;
	duck.direction = 1;
	// Random height in upper half of screen
	duck.y = Math.random() * 800 + 400;
	// Random speed based on difficulty - very fast movement
	duck.speed = 8 + Math.random() * 6 + difficulty * 2;
	ducks.push(duck);
	game.addChild(duck);
	LK.getSound('quack').play();
}
game.update = function () {
	duckSpawnTimer++;
	// Spawn ducks based on difficulty
	var spawnRate = Math.max(60 - difficulty * 5, 30);
	if (duckSpawnTimer >= spawnRate) {
		spawnDuck();
		duckSpawnTimer = 0;
	}
	// Update and check bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Remove bullets that go off screen
		if (bullet.y < -50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-duck collisions
		for (var j = ducks.length - 1; j >= 0; j--) {
			var duck = ducks[j];
			if (!duck.isHit && bullet.intersects(duck)) {
				if (duck.hit()) {
					gameScore += 10 * difficulty;
					LK.setScore(gameScore);
					scoreTxt.setText('Score: ' + gameScore);
					// Remove duck from array
					ducks.splice(j, 1);
					// Remove bullet
					bullet.destroy();
					bullets.splice(i, 1);
					break;
				}
			}
		}
	}
	// Check for ducks that escaped (only check right side since ducks fly left to right)
	for (var k = ducks.length - 1; k >= 0; k--) {
		var duck = ducks[k];
		if (!duck.isHit && duck.x > 2200) {
			duck.destroy();
			ducks.splice(k, 1);
		}
	}
	// Increase difficulty every 100 points
	var newDifficulty = Math.floor(gameScore / 100) + 1;
	if (newDifficulty > difficulty) {
		difficulty = newDifficulty;
	}
	// Win condition - score 500 points
	if (gameScore >= 500) {
		LK.showYouWin();
	}
};