/**** 
* Classes
****/
// LivesDisplay class
var LivesDisplay = Container.expand(function () {
	var self = Container.call(this);
	self.livesText = new Text2('Lives: 3', {
		size: 100,
		fill: "#ffffff"
	});
	self.livesText.anchor.set(0.5, 0);
	LK.gui.top.addChild(self.livesText);
	self.updateLives = function (lives) {
		self.livesText.setText('Lives: ' + lives);
	};
});
// ScoreDisplay class
var ScoreDisplay = Container.expand(function () {
	var self = Container.call(this);
	self.scoreText = new Text2('Score: 0', {
		size: 100,
		fill: "#ffffff"
	});
	self.scoreText.anchor.set(0.5, 0);
	self.scoreText.y = 150; // Offset from the LivesDisplay
	LK.gui.top.addChild(self.scoreText);
	self.updateScore = function (score) {
		self.scoreText.setText('Score: ' + score);
	};
});
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero character', 0.5, 0.5);
	self.x = 2048 / 2;
	self.y = 2732 / 2;
	self.lives = 3; // Hero starts with 3 lives
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy character', 0.5, 0.5);
	self.speed = 2;
	self.move = function () {
		// Movement towards the hero's position
		var dx = hero.x - self.x;
		var dy = hero.y - self.y;
		var angle = Math.atan2(dy, dx);
		self.x += Math.cos(angle) * self.speed;
		self.y += Math.sin(angle) * self.speed;
	};
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('bullet', 'Bullet Graphics', 0.5, 0.5);
	self.speed = 10;
	self.move = function () {
		self.y -= self.speed;
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundAsset: 'swamp',
	// Add swamp background asset
	backgroundColor: 0x000000 // Init game with black background
});

/**** 
* Game Code
****/
// Initialize hero, lives display, and score display
var hero = game.addChild(new Hero());
var livesDisplay = game.addChild(new LivesDisplay());
var scoreDisplay = game.addChild(new ScoreDisplay());
var score = 0; // Global score variable

// Update the lives display when hero's lives change
Hero.prototype.updateLives = function () {
	livesDisplay.updateLives(this.lives);
};

// Initialize enemies and bullets arrays
var enemies = [];
var bullets = [];
// Initialize firing rate, enemy spawn rate, and wave system
var firingRate = 30; // Increased firing rate (ticks)
var spawnRate = 180; // Increased enemy spawn rate (ticks) to decrease intensity
var waveCount = 0; // Number of waves that have passed
var enemiesPerWave = 10; // Base number of enemies per wave
var enemySpeedIncrease = 0.01; // Speed increase per wave
var waveCounterDisplay = new Text2('Wave: 1', {
	size: 100,
	fill: "#ffffff"
});
waveCounterDisplay.anchor.set(0.5, 0);
waveCounterDisplay.y = 300; // Offset from the ScoreDisplay
LK.gui.top.addChild(waveCounterDisplay);
var score = 0; // Global score variable

// Function to spawn enemies
function spawnEnemy() {
	waveCount++;
	waveCounterDisplay.setText('Wave: ' + waveCount);
	var enemiesToSpawn = enemiesPerWave + waveCount;
	for (var i = 0; i < enemiesToSpawn; i++) {
		var angle = Math.random() * Math.PI * 2; // Random angle
		var radius = 1200; // Spawn circle radius
		var enemy = new Enemy();
		enemy.speed += enemy.speed * waveCount * enemySpeedIncrease; // Increase speed by 1% per wave
		enemy.x = 1024 + radius * Math.cos(angle);
		enemy.y = 1366 + radius * Math.sin(angle);
		enemies.push(enemy);
		game.addChild(enemy);
	}
}

// Function to fire a bullet
function fireBullet() {
	if (enemies.length === 0) {
		return;
	} // No enemies to shoot at
	var nearestEnemy = enemies.reduce(function (closest, enemy) {
		var closestDist = Math.sqrt(Math.pow(closest.x - hero.x, 2) + Math.pow(closest.y - hero.y, 2));
		var enemyDist = Math.sqrt(Math.pow(enemy.x - hero.x, 2) + Math.pow(enemy.y - hero.y, 2));
		return enemyDist < closestDist ? enemy : closest;
	}, enemies[0]);
	var angleToNearestEnemy = Math.atan2(nearestEnemy.y - hero.y, nearestEnemy.x - hero.x);
	var bullet = new Bullet();
	bullet.x = hero.x;
	bullet.y = hero.y;
	bullet.move = function () {
		this.x += Math.cos(angleToNearestEnemy) * this.speed;
		this.y += Math.sin(angleToNearestEnemy) * this.speed;
	};
	bullets.push(bullet);
	game.addChild(bullet);
}

// Game tick event
LK.on('tick', function () {
	// Move the hero towards the touch position
	if (game.touchPosition) {
		hero.x += (game.touchPosition.x - hero.x) * 0.1;
		hero.y += (game.touchPosition.y - hero.y) * 0.1;
	}

	// Move bullets and check for collisions with enemies
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].move();
		// Check for bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			if (bullets[i] && bullets[i].intersects(enemies[j])) {
				// Destroy enemy and update score
				score += 1; // Increment score
				scoreDisplay.updateScore(score); // Update score display
				spawnRate = Math.max(30, spawnRate - 5); // Decrease spawn rate by 5 ticks to a minimum of 30 ticks
				enemies[j].destroy();
				enemies.splice(j, 1);
				// Destroy bullet
				bullets[i].destroy();
				bullets.splice(i, 1);
				break; // Break out of the enemies loop since the bullet is destroyed
			}
		}
		// Remove bullets that are off-screen
		if (bullets[i] && bullets[i].y < 0) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}

	// Move enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].move();
		if (enemies[j].intersects(hero)) {
			hero.lives -= 1; // Decrease hero's lives by one
			hero.updateLives(); // Update the lives display
			LK.effects.flashScreen(0xff0000, 500); // Flash screen red for half a second
			if (hero.lives <= 0) {
				LK.showGameOver(); // If no lives left, show game over
				return;
			}
			enemies[j].destroy(); // Destroy the enemy that collided with the hero
			enemies.splice(j, 1);
		}
	}

	// Spawn enemies only if the previous wave has been cleared
	if (LK.ticks % spawnRate === 0 && enemies.length === 0) {
		spawnEnemy();
	}

	// Fire bullets
	if (LK.ticks % firingRate === 0) {
		fireBullet();
	}
}); // Track touch position
var touchPosition = null;
game.on('move', function (obj) {
	var event = obj.event;
	touchPosition = event.getLocalPosition(game);
	game.touchPosition = touchPosition;
});