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

/**** 
* Classes
****/ 
var Battleship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('battleship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 3;
	self.fireTimer = 0;
	self.fireRate = 20; // Fire every 1/3 second
	self.update = function () {
		self.fireTimer++;
		if (self.fireTimer >= self.fireRate) {
			self.fireTimer = 0;
			var bullet = new PlayerBullet();
			bullet.x = self.x;
			bullet.y = self.y - 50;
			playerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('playerShoot').play();
		}
	};
	return self;
});
var Bomb = Container.expand(function () {
	var self = Container.call(this);
	var bombGraphics = self.attachAsset('bomb', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyPlane = Container.expand(function () {
	var self = Container.call(this);
	var planeGraphics = self.attachAsset('enemyPlane', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 1;
	self.fireTimer = 0;
	self.fireRate = 120; // Fire every 2 seconds
	self.update = function () {
		self.y += self.speed;
		self.fireTimer++;
		// Fire bullets occasionally
		if (self.fireTimer >= self.fireRate && Math.random() < 0.3) {
			self.fireTimer = 0;
			var bullet = new EnemyBullet();
			bullet.x = self.x;
			bullet.y = self.y + 30;
			enemyBullets.push(bullet);
			game.addChild(bullet);
		}
		// Drop bombs occasionally
		if (Math.random() < 0.002) {
			var bomb = new Bomb();
			bomb.x = self.x;
			bomb.y = self.y + 30;
			bombs.push(bomb);
			game.addChild(bomb);
		}
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x001122
});

/**** 
* Game Code
****/ 
// Game variables
var battleship;
var playerBullets = [];
var enemyPlanes = [];
var enemyBullets = [];
var bombs = [];
var waveTimer = 0;
var waveSize = 3;
var enemySpawnRate = 180; // 3 seconds
var dragNode = null;
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var healthTxt = new Text2('Health: 3', {
	size: 50,
	fill: 0xFF0000
});
healthTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(healthTxt);
// Create battleship
battleship = game.addChild(new Battleship());
battleship.x = 2048 / 2;
battleship.y = 2732 - 150;
// Touch/Mouse controls
function handleMove(x, y, obj) {
	if (dragNode) {
		dragNode.x = Math.max(60, Math.min(2048 - 60, x));
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	dragNode = battleship;
	handleMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Spawn enemy waves
function spawnEnemyWave() {
	var formation = Math.floor(Math.random() * 3); // 3 different formations
	for (var i = 0; i < waveSize; i++) {
		var enemy = new EnemyPlane();
		if (formation === 0) {
			// Line formation
			enemy.x = 200 + i * 200;
			enemy.y = -50;
		} else if (formation === 1) {
			// V formation
			enemy.x = 1024 + (i - Math.floor(waveSize / 2)) * 150;
			enemy.y = -50 - Math.abs(i - Math.floor(waveSize / 2)) * 30;
		} else {
			// Scattered formation
			enemy.x = 200 + Math.random() * 1648;
			enemy.y = -50 - Math.random() * 100;
		}
		enemy.speed = 1 + Math.random() * 2;
		enemyPlanes.push(enemy);
		game.addChild(enemy);
	}
}
// Main game update loop
game.update = function () {
	waveTimer++;
	// Spawn enemy waves
	if (waveTimer >= enemySpawnRate) {
		waveTimer = 0;
		spawnEnemyWave();
		// Increase difficulty over time
		if (enemySpawnRate > 60) {
			enemySpawnRate -= 2;
		}
		if (waveSize < 6) {
			waveSize += 0.1;
		}
	}
	// Update and check player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY >= -10 && bullet.y < -10) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemy planes
		var hitEnemy = false;
		for (var j = enemyPlanes.length - 1; j >= 0; j--) {
			var enemy = enemyPlanes[j];
			if (bullet.intersects(enemy)) {
				// Enemy hit
				enemy.health--;
				if (enemy.health <= 0) {
					LK.setScore(LK.getScore() + 100);
					scoreTxt.setText('Score: ' + LK.getScore());
					LK.effects.flashObject(enemy, 0xff0000, 300);
					LK.getSound('enemyHit').play();
					LK.setTimeout(function () {
						enemy.destroy();
					}, 300);
					enemyPlanes.splice(j, 1);
				}
				bullet.destroy();
				playerBullets.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			bullet.lastY = bullet.y;
		}
	}
	// Update and check enemy planes
	for (var i = enemyPlanes.length - 1; i >= 0; i--) {
		var enemy = enemyPlanes[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove enemies that go off screen
		if (enemy.lastY <= 2782 && enemy.y > 2782) {
			enemy.destroy();
			enemyPlanes.splice(i, 1);
			continue;
		}
		enemy.lastY = enemy.y;
	}
	// Update and check enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Remove bullets that go off screen
		if (bullet.lastY <= 2782 && bullet.y > 2782) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with battleship
		if (bullet.intersects(battleship)) {
			battleship.health--;
			healthTxt.setText('Health: ' + battleship.health);
			LK.effects.flashObject(battleship, 0xff0000, 500);
			LK.getSound('playerHit').play();
			bullet.destroy();
			enemyBullets.splice(i, 1);
			if (battleship.health <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			}
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update and check bombs
	for (var i = bombs.length - 1; i >= 0; i--) {
		var bomb = bombs[i];
		if (bomb.lastY === undefined) bomb.lastY = bomb.y;
		// Remove bombs that go off screen
		if (bomb.lastY <= 2782 && bomb.y > 2782) {
			bomb.destroy();
			bombs.splice(i, 1);
			continue;
		}
		// Check collision with battleship
		if (bomb.intersects(battleship)) {
			battleship.health -= 2; // Bombs do more damage
			healthTxt.setText('Health: ' + battleship.health);
			LK.effects.flashObject(battleship, 0xff0000, 800);
			LK.getSound('explosion').play();
			bomb.destroy();
			bombs.splice(i, 1);
			if (battleship.health <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			}
			continue;
		}
		bomb.lastY = bomb.y;
	}
};