/**** 
* 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 = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
var Star = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

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

/**** 
* Game Code
****/ 
// Game state management
var gameState = 'menu'; // 'menu' or 'playing'
// Create stars for background
var stars = [];
for (var i = 0; i < 150; i++) {
	var star = new Star();
	star.x = Math.random() * 2048;
	star.y = Math.random() * 2732;
	stars.push(star);
	game.addChild(star);
}
// Main Menu Elements
var titleText = new Text2('SPACE SHOOTER', {
	size: 120,
	fill: 0xFFFFFF
});
titleText.anchor.set(0.5, 0.5);
titleText.x = 1024;
titleText.y = 800;
game.addChild(titleText);
var startButton = new Text2('TAP TO START', {
	size: 80,
	fill: 0x00FF00
});
startButton.anchor.set(0.5, 0.5);
startButton.x = 1024;
startButton.y = 1400;
game.addChild(startButton);
// Instructions text
var instructionsText = new Text2('Move left and right to avoid bullets', {
	size: 50,
	fill: 0xCCCCCC
});
instructionsText.anchor.set(0.5, 0.5);
instructionsText.x = 1024;
instructionsText.y = 1600;
game.addChild(instructionsText);
function startGame() {
	// Hide menu elements
	titleText.visible = false;
	startButton.visible = false;
	instructionsText.visible = false;
	// Change game state
	gameState = 'playing';
	// Reset game start time
	gameStartTime = Date.now();
}
// Game variables (initialized when game starts)
var player = null;
var bullets = [];
var bulletSpawnTimer = 0;
var bulletSpawnDelay = 60; // Start spawning every 60 ticks (1 second)
var minSpawnDelay = 20; // Minimum spawn delay (maximum difficulty)
var difficultyTimer = 0;
var speedMultiplier = 1;
var gameStartTime = Date.now();
var dragNode = null;
var scoreTxt = null;
var timeTxt = null;
function initializeGameplay() {
	// Create player
	player = game.addChild(new Player());
	player.x = 1024; // Center horizontally
	player.y = 2200; // Near bottom of screen
	// Reset game variables
	bullets = [];
	bulletSpawnTimer = 0;
	speedMultiplier = 1;
	// Score display
	scoreTxt = new Text2('0', {
		size: 100,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(1, 0);
	LK.gui.topRight.addChild(scoreTxt);
	// Time display
	timeTxt = new Text2('Time: 0s', {
		size: 60,
		fill: 0xFFFFFF
	});
	timeTxt.anchor.set(0, 0);
	timeTxt.x = 120;
	timeTxt.y = 20;
	LK.gui.topLeft.addChild(timeTxt);
}
function updateScore() {
	var timeAlive = Math.floor((Date.now() - gameStartTime) / 1000);
	LK.setScore(timeAlive);
	scoreTxt.setText(timeAlive);
	timeTxt.setText('Time: ' + timeAlive + 's');
}
function spawnBullet() {
	var bullet = new Bullet();
	bullet.x = Math.random() * (2048 - 100) + 50; // Random x position with margin
	bullet.y = -30; // Start above screen
	bullet.speed = (6 + Math.random() * 4) * speedMultiplier; // Apply speed multiplier
	bullets.push(bullet);
	game.addChild(bullet);
}
function increaseDifficulty() {
	var currentScore = LK.getScore();
	// Check if we've reached a new 5-point milestone
	if (currentScore > 0 && currentScore % 5 === 0) {
		// Only increase difficulty if we haven't already increased it for this score
		if (currentScore / 5 > speedMultiplier - 1) {
			speedMultiplier = Math.floor(currentScore / 5) + 1;
			// Decrease spawn delay (more bullets spawn)
			bulletSpawnDelay = Math.max(minSpawnDelay, Math.floor(60 / speedMultiplier));
		}
	}
}
function handleMove(x, y, obj) {
	if (dragNode) {
		// Keep player within screen bounds horizontally only
		dragNode.x = Math.max(40, Math.min(2008, x));
		// Keep player locked to bottom area - no vertical movement
		dragNode.y = 2200;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	if (gameState === 'menu') {
		// Start the game when menu is tapped
		startGame();
		initializeGameplay();
	} else if (gameState === 'playing' && player) {
		// Set drag node to player for any touch on screen
		dragNode = player;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.update = function () {
	if (gameState === 'menu') {
		// Add blinking effect to start button
		if (LK.ticks % 60 < 30) {
			startButton.alpha = 1;
		} else {
			startButton.alpha = 0.5;
		}
		return;
	}
	if (gameState === 'playing' && player) {
		updateScore();
		increaseDifficulty();
		// Spawn bullets
		bulletSpawnTimer++;
		if (bulletSpawnTimer >= bulletSpawnDelay) {
			spawnBullet();
			bulletSpawnTimer = 0;
		}
		// Update and check bullets
		for (var i = bullets.length - 1; i >= 0; i--) {
			var bullet = bullets[i];
			// Initialize tracking variables
			if (bullet.lastY === undefined) bullet.lastY = bullet.y;
			if (bullet.lastIntersecting === undefined) bullet.lastIntersecting = false;
			// Check if bullet went off screen
			if (bullet.lastY <= 2800 && bullet.y > 2800) {
				bullet.destroy();
				bullets.splice(i, 1);
				continue;
			}
			// Check collision with player
			var currentIntersecting = bullet.intersects(player);
			if (!bullet.lastIntersecting && currentIntersecting) {
				// Collision detected - game over
				LK.getSound('hit').play();
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			}
			// Update tracking variables
			bullet.lastY = bullet.y;
			bullet.lastIntersecting = currentIntersecting;
		}
	}
};