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

/**** 
* Classes
****/ 
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	// Main body
	var shipBody = self.attachAsset('enemyShipBody', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Wings
	var wings = self.attachAsset('enemyShipWings', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -15
	});
	// Core/cockpit
	var core = self.attachAsset('enemyShipCore', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 0
	});
	// Thruster
	var thruster = self.attachAsset('enemyShipThruster', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 30
	});
	self.speed = 3;
	self.health = 1;
	self.shootTimer = 0;
	self.shootInterval = 60 + Math.random() * 120; // Random shooting interval
	self.update = function () {
		self.y += self.speed;
		// Enemy shooting logic
		self.shootTimer++;
		if (self.shootTimer >= self.shootInterval) {
			self.shootTimer = 0;
			self.shootInterval = 60 + Math.random() * 120; // Reset with new random interval
			// Create enemy bullet
			var bullet = new EnemyBullet();
			bullet.x = self.x;
			bullet.y = self.y + 40;
			bullet.lastY = bullet.y;
			enemyBullets.push(bullet);
			game.addChild(bullet);
		}
	};
	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 = -12;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	// Main body
	var shipBody = self.attachAsset('playerShipBody', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Wings
	var leftWing = self.attachAsset('playerShipWings', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 20
	});
	// Cockpit
	var cockpit = self.attachAsset('playerShipCockpit', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: -15
	});
	// Engine thrusters
	var leftEngine = self.attachAsset('playerShipEngines', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -25,
		y: 35
	});
	var rightEngine = self.attachAsset('playerShipEngines', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 25,
		y: 35
	});
	// Shield visual effect (initially hidden)
	var shieldGraphics = self.attachAsset('shieldEffect', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 0,
		alpha: 0
	});
	self.shieldGraphics = shieldGraphics;
	self.shootTimer = 0;
	self.shootInterval = 15; // Shoot every 15 ticks (4 times per second)
	self.update = function () {
		// Auto-shooting logic
		self.shootTimer++;
		var currentShootInterval = playerUpgrades.rapidFire ? Math.floor(self.shootInterval / 2) : self.shootInterval;
		if (self.shootTimer >= currentShootInterval) {
			self.shootTimer = 0;
			if (playerUpgrades.tripleShot) {
				// Triple shot
				for (var shotIndex = 0; shotIndex < 3; shotIndex++) {
					var bullet = new PlayerBullet();
					bullet.x = self.x + (shotIndex - 1) * 30; // Spread shots
					bullet.y = self.y - 50;
					bullet.lastY = bullet.y;
					playerBullets.push(bullet);
					game.addChild(bullet);
				}
			} else {
				// Single shot
				var bullet = new PlayerBullet();
				bullet.x = self.x;
				bullet.y = self.y - 50;
				bullet.lastY = bullet.y;
				playerBullets.push(bullet);
				game.addChild(bullet);
			}
			LK.getSound('shoot').play();
		}
	};
	return self;
});
var Upgrade = Container.expand(function (type) {
	var self = Container.call(this);
	self.type = type;
	self.speed = 4;
	var upgradeGraphics = self.attachAsset('upgrade' + type, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Pulsing animation
	tween(upgradeGraphics, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 800,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			tween(upgradeGraphics, {
				scaleX: 1.0,
				scaleY: 1.0
			}, {
				duration: 800,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					// Restart the pulsing animation
					if (self.parent) {
						tween(upgradeGraphics, {
							scaleX: 1.2,
							scaleY: 1.2
						}, {
							duration: 800,
							easing: tween.easeInOut,
							onFinish: arguments.callee.caller
						});
					}
				}
			});
		}
	});
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
// Game variables
var playerBullets = [];
var enemyBullets = [];
var enemies = [];
var upgrades = [];
var enemySpawnTimer = 0;
var enemySpawnInterval = 120; // Start with 2 seconds between spawns
var upgradeSpawnTimer = 0;
var upgradeSpawnInterval = 600; // 10 seconds between upgrades
var dragNode = null;
var difficultyTimer = 0;
// Upgrade system
var playerUpgrades = {
	rapidFire: false,
	rapidFireTimer: 0,
	shield: false,
	shieldTimer: 0,
	tripleShot: false,
	tripleShotTimer: 0
};
// Create player ship
var player = game.addChild(new PlayerShip());
player.x = 1024; // Center horizontally
player.y = 2400; // Near bottom of screen
// Create game title
var titleTxt = new Text2('SPACE INVADERS 2.0', {
	size: 80,
	fill: 0x00ff00
});
titleTxt.anchor.set(0.5, 0);
titleTxt.x = 0;
titleTxt.y = 20;
LK.gui.top.addChild(titleTxt);
// Create score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
scoreTxt.y = 120;
LK.gui.top.addChild(scoreTxt);
scoreTxt.setText(LK.getScore());
// Stick control variables
var stickActive = false;
var stickStartX = 0;
var stickStartY = 0;
var stickCurrentX = 0;
var stickCurrentY = 0;
var maxStickDistance = 150;
// Touch controls for stick movement
function handleMove(x, y, obj) {
	if (stickActive) {
		stickCurrentX = x;
		stickCurrentY = y;
		// Calculate distance from start point
		var deltaX = stickCurrentX - stickStartX;
		var deltaY = stickCurrentY - stickStartY;
		var distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
		// Limit stick movement to max distance
		if (distance > maxStickDistance) {
			var angle = Math.atan2(deltaY, deltaX);
			deltaX = Math.cos(angle) * maxStickDistance;
			deltaY = Math.sin(angle) * maxStickDistance;
			stickCurrentX = stickStartX + deltaX;
			stickCurrentY = stickStartY + deltaY;
		}
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	stickActive = true;
	stickStartX = x;
	stickStartY = y;
	stickCurrentX = x;
	stickCurrentY = y;
};
game.up = function (x, y, obj) {
	stickActive = false;
};
game.update = function () {
	// Move player based on stick input
	if (stickActive) {
		var deltaX = stickCurrentX - stickStartX;
		var deltaY = stickCurrentY - stickStartY;
		// Normalize movement based on stick distance
		var moveSpeed = 16;
		var normalizedX = deltaX / maxStickDistance;
		var normalizedY = deltaY / maxStickDistance;
		// Apply movement
		player.x += normalizedX * moveSpeed;
		player.y += normalizedY * moveSpeed;
		// Keep player within screen bounds
		player.x = Math.max(40, Math.min(2008, player.x));
		player.y = Math.max(100, Math.min(2632, player.y));
	}
	// Update difficulty over time
	difficultyTimer++;
	if (difficultyTimer % 600 == 0) {
		// Every 10 seconds
		enemySpawnInterval = Math.max(30, enemySpawnInterval - 10); // Faster spawning, minimum 0.5 seconds
	}
	// Update upgrade timers
	if (playerUpgrades.rapidFire) {
		playerUpgrades.rapidFireTimer--;
		if (playerUpgrades.rapidFireTimer <= 0) {
			playerUpgrades.rapidFire = false;
			// Flash effect when upgrade expires
			LK.effects.flashObject(player, 0x00ff00, 300);
		}
	}
	if (playerUpgrades.shield) {
		playerUpgrades.shieldTimer--;
		if (playerUpgrades.shieldTimer <= 0) {
			playerUpgrades.shield = false;
			player.alpha = 1.0; // Reset transparency
			// Hide shield visual effect
			tween.stop(player.shieldGraphics);
			tween(player.shieldGraphics, {
				alpha: 0
			}, {
				duration: 300,
				easing: tween.easeOut
			});
		}
	}
	if (playerUpgrades.tripleShot) {
		playerUpgrades.tripleShotTimer--;
		if (playerUpgrades.tripleShotTimer <= 0) {
			playerUpgrades.tripleShot = false;
			// Flash effect when upgrade expires
			LK.effects.flashObject(player, 0xff0080, 300);
		}
	}
	// Spawn upgrades
	upgradeSpawnTimer++;
	if (upgradeSpawnTimer >= upgradeSpawnInterval) {
		upgradeSpawnTimer = 0;
		var upgradeTypes = ['RapidFire', 'Shield', 'TripleShot'];
		var randomType = upgradeTypes[Math.floor(Math.random() * upgradeTypes.length)];
		var upgrade = new Upgrade(randomType);
		upgrade.x = 100 + Math.random() * 1848;
		upgrade.y = -50;
		upgrade.lastY = upgrade.y;
		upgrades.push(upgrade);
		game.addChild(upgrade);
	}
	// Spawn enemies
	enemySpawnTimer++;
	if (enemySpawnTimer >= enemySpawnInterval) {
		enemySpawnTimer = 0;
		var enemy = new EnemyShip();
		enemy.x = 100 + Math.random() * 1848; // Random x position within screen
		enemy.y = -50; // Start above screen
		enemy.lastY = enemy.y;
		enemy.speed = 2 + Math.random() * 3 + LK.getScore() / 50; // Increase speed with score
		enemies.push(enemy);
		game.addChild(enemy);
	}
	// 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 >= -25 && bullet.y < -25) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Enemy destroyed
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText(LK.getScore());
				// Visual effect
				LK.effects.flashObject(enemy, 0xffffff, 200);
				// Clean up
				bullet.destroy();
				enemy.destroy();
				playerBullets.splice(i, 1);
				enemies.splice(j, 1);
				LK.getSound('enemyDestroy').play();
				hitEnemy = true;
				break;
			}
		}
		if (!hitEnemy) {
			bullet.lastY = bullet.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 <= 2757 && bullet.y > 2757) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bullet.intersects(player)) {
			if (!playerUpgrades.shield) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.getSound('playerHit').play();
				LK.showGameOver();
				return;
			} else {
				// Shield absorbs the hit
				bullet.destroy();
				enemyBullets.splice(i, 1);
				LK.effects.flashObject(player, 0x0080ff, 200);
				continue;
			}
		}
		bullet.lastY = bullet.y;
	}
	// Update and check upgrades
	for (var i = upgrades.length - 1; i >= 0; i--) {
		var upgrade = upgrades[i];
		if (upgrade.lastY === undefined) upgrade.lastY = upgrade.y;
		// Remove upgrades that go off screen
		if (upgrade.lastY <= 2757 && upgrade.y > 2757) {
			upgrade.destroy();
			upgrades.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (upgrade.intersects(player)) {
			LK.getSound('upgradePickup').play();
			if (upgrade.type === 'RapidFire') {
				playerUpgrades.rapidFire = true;
				playerUpgrades.rapidFireTimer = 600; // 10 seconds
				LK.effects.flashObject(player, 0x00ff00, 500);
			} else if (upgrade.type === 'Shield') {
				playerUpgrades.shield = true;
				playerUpgrades.shieldTimer = 600; // 10 seconds
				player.alpha = 0.7; // Make player semi-transparent to show shield
				// Show shield visual effect
				player.shieldGraphics.alpha = 0.6;
				// Start pulsing animation for shield
				tween(player.shieldGraphics, {
					alpha: 0.3
				}, {
					duration: 500,
					easing: tween.easeInOut,
					onFinish: function onFinish() {
						if (playerUpgrades.shield) {
							tween(player.shieldGraphics, {
								alpha: 0.6
							}, {
								duration: 500,
								easing: tween.easeInOut,
								onFinish: arguments.callee.caller
							});
						}
					}
				});
				LK.effects.flashObject(player, 0x0080ff, 500);
			} else if (upgrade.type === 'TripleShot') {
				playerUpgrades.tripleShot = true;
				playerUpgrades.tripleShotTimer = 600; // 10 seconds
				LK.effects.flashObject(player, 0xff0080, 500);
			}
			upgrade.destroy();
			upgrades.splice(i, 1);
			continue;
		}
		upgrade.lastY = upgrade.y;
	}
	// Update and check enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		// Remove enemies that go off screen
		if (enemy.lastY <= 2757 && enemy.y > 2757) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (enemy.intersects(player)) {
			if (!playerUpgrades.shield) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.getSound('playerHit').play();
				LK.showGameOver();
				return;
			} else {
				// Shield absorbs the hit and destroys the enemy
				LK.setScore(LK.getScore() + 5); // Bonus points for shield collision
				scoreTxt.setText(LK.getScore());
				LK.effects.flashObject(player, 0x0080ff, 200);
				enemy.destroy();
				enemies.splice(i, 1);
				continue;
			}
		}
		enemy.lastY = enemy.y;
	}
};