/**** 
* Classes
****/ 
// Define a class for enemies
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2; // Default speed, will be overridden when spawned
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -50) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
// Define a class for the player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.jumpHeight = 40;
	self.isJumping = false;
	self.velocityY = 0;
	self.update = function () {
		if (self.isJumping) {
			self.y += self.velocityY;
			// Calculate gravity based on score - decreases by 5% for each point
			var gravityReduction = LK.getScore() * 0.05;
			var currentGravity = 0.56 * (1 - gravityReduction);
			// Ensure gravity doesn't become negative or too small
			currentGravity = Math.max(currentGravity, 0.1);
			self.velocityY += currentGravity;
			if (self.y >= 2732 / 2) {
				// Ground level
				self.y = 2732 / 2;
				self.isJumping = false;
				self.velocityY = 0;
			}
		}
	};
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.velocityY = -self.jumpHeight;
		}
	};
});

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

/**** 
* Game Code
****/ 
var background = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0
}));
background.x = 0;
background.y = 0;
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 / 2;
// Initialize enemies
var enemies = [];
var enemySpawnInterval = 100;
var enemySpawnCounter = 0;
var baseEnemySpeed = 2; // Base speed for enemies at start
// Create a new Text2 object to display the score
var scoreText = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
// Add the score text to the game GUI at the top center of the screen
LK.gui.top.addChild(scoreText);
scoreText.x = 2048 / 2;
scoreText.y = 0;
// Handle game updates
game.update = function () {
	player.update();
	// Spawn enemies
	enemySpawnCounter++;
	if (enemySpawnCounter >= enemySpawnInterval) {
		var enemy = new Enemy();
		enemy.x = 2048;
		enemy.y = 2732 / 2;
		// Set enemy speed based on current score - increases by 0.5 for each point
		// Plus additional 7% increase for each gravity reduction (each point scored)
		var gravityReductions = LK.getScore();
		var additionalSpeedBoost = baseEnemySpeed * gravityReductions * 0.07;
		enemy.speed = baseEnemySpeed + LK.getScore() * 0.5 + additionalSpeedBoost;
		enemies.push(enemy);
		game.addChild(enemy);
		// Randomize the spawn interval for the next enemy
		enemySpawnInterval = Math.floor(Math.random() * 150) + 50;
		enemySpawnCounter = 0;
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].update();
		// Reduce collision sensitivity by checking distance instead of full intersection
		var dx = player.x - enemies[j].x;
		var dy = player.y - enemies[j].y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		// Only trigger collision if very close (reduced from full hitbox to smaller radius)
		// Reduced by 6% from 40 to 37.6
		if (distance < 37.6) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		} else if (player.x > enemies[j].x && !enemies[j].passed) {
			enemies[j].passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreText.setText(LK.getScore());
			// Boost player forward by 10%
			player.x += player.speed * 0.1;
			// Make camera follow the player by moving all game elements backwards
			var cameraOffset = player.speed * 0.1;
			background.x -= cameraOffset;
			for (var k = 0; k < enemies.length; k++) {
				enemies[k].x -= cameraOffset;
			}
		}
	}
};
// Handle player jump
game.down = function (x, y, obj) {
	player.jump();
};