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

/**** 
* 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 = 5;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -50) {
			self.destroy();
		}
	};
});
// Define a class for flying enemies
var FlyingEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('flyingEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 7;
	self.amplitude = 100;
	self.frequency = 0.03;
	self.initialY = 0;
	self.angle = Math.random() * Math.PI * 2;
	self.passed = false;
	self.update = function () {
		self.x -= self.speed;
		self.y = self.initialY + Math.sin(self.angle) * self.amplitude;
		self.angle += self.frequency;
		if (self.x < -100) {
			self.destroy();
		}
	};
	return self;
});
// Define a class for plant enemies
var PlantEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('plantEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 4;
	self.passed = false;
	self.canJump = true;
	self.jumpInterval = Math.floor(Math.random() * 100) + 50;
	self.jumpCounter = 0;
	self.velocityY = 0;
	self.isJumping = false;
	self.update = function () {
		self.x -= self.speed;
		// Jump logic
		self.jumpCounter++;
		if (self.jumpCounter >= self.jumpInterval && self.canJump && !self.isJumping) {
			self.isJumping = true;
			self.velocityY = -15;
			self.jumpCounter = 0;
		}
		if (self.isJumping) {
			self.y += self.velocityY;
			self.velocityY += 0.6;
			if (self.y >= 2732 / 2 * 1.664) {
				self.y = 2732 / 2 * 1.664;
				self.isJumping = false;
				self.velocityY = 0;
			}
		}
		if (self.x < -100) {
			self.destroy();
		}
	};
	return self;
});
//<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 = 25;
	self.isJumping = false;
	self.velocityY = 0;
	self.update = function () {
		if (self.isJumping) {
			self.y += self.velocityY;
			self.velocityY += 0.3; // Decreased gravity effect by 30%
			if (self.y >= 2732 / 2 * 1.664) {
				// Ground level
				self.y = 2732 / 2 * 1.664;
				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
****/ 
// Create multiple backgrounds for seamless scrolling
var backgrounds = [];
// Create two background instances to create infinite scrolling effect
for (var i = 0; i < 2; i++) {
	var background = game.addChild(LK.getAsset('background', {
		anchorX: 0,
		anchorY: 0
	}));
	background.x = i * 2048; // Position backgrounds side by side
	background.y = 0;
	backgrounds.push(background);
}
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 / 2 * 1.664; // Move down by 66.4% (46.4% + 20%)
// Initialize enemies
var enemies = [];
var enemySpawnInterval = 100;
var enemySpawnCounter = 0;
var lastEnemyType = -1; // Track the last enemy type that was spawned
var sameTypeCount = 0; // Counter for consecutive same-type enemies
var canSpawn = true; // Flag to control enemy spawning
// 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();
	// Update background positions for scrolling effect
	for (var i = 0; i < backgrounds.length; i++) {
		// Move backgrounds to the left
		backgrounds[i].x -= 3; // Slower than enemies for parallax effect
		// When a background moves completely off screen to the left, move it to the right
		if (backgrounds[i].x <= -2048) {
			backgrounds[i].x = 2048;
		}
	}
	// Spawn enemies
	enemySpawnCounter++;
	if (enemySpawnCounter >= enemySpawnInterval && canSpawn) {
		// Check if any enemies are at the screen edge (about to enter)
		var enemiesEnteringScreen = false;
		for (var i = 0; i < enemies.length; i++) {
			if (enemies[i].x >= 2048 - 300) {
				// Buffer zone at screen edge
				enemiesEnteringScreen = true;
				break;
			}
		}
		if (!enemiesEnteringScreen) {
			// Randomly choose enemy type
			var enemyType = Math.floor(Math.random() * 3);
			// Check if we need to avoid the same enemy type
			if (enemyType === lastEnemyType) {
				sameTypeCount++;
				// If we already have 2 of the same type, choose a different type
				if (sameTypeCount >= 2) {
					do {
						enemyType = Math.floor(Math.random() * 3);
					} while (enemyType === lastEnemyType);
					sameTypeCount = 0;
				}
			} else {
				sameTypeCount = 0;
			}
			var enemy;
			if (enemyType === 0) {
				enemy = new Enemy();
				enemy.x = 2048;
				enemy.y = 2732 / 2 * 1.664; // Move down by 66.4% (46.4% + 20%)
			} else if (enemyType === 1) {
				enemy = new FlyingEnemy();
				enemy.x = 2048;
				enemy.y = 2732 / 3 * 1.664; // Flying enemy starts higher, moved down by 66.4% (46.4% + 20%)
				enemy.initialY = enemy.y;
			} else {
				enemy = new PlantEnemy();
				enemy.x = 2048;
				enemy.y = 2732 / 2 * 1.664; // Move down by 66.4% (46.4% + 20%)
			}
			// Save the current enemy type as the last one
			lastEnemyType = enemyType;
			enemy.passedMiddle = false; // Initialize the middle crossing property
			enemies.push(enemy);
			game.addChild(enemy);
			// Randomize the spawn interval for the next enemy
			enemySpawnInterval = Math.floor(Math.random() * 150) + 50;
			enemySpawnCounter = 0;
			// Prevent new enemies from spawning until current one crosses the middle
			canSpawn = false;
		}
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].update();
		// Check if enemy has just crossed the middle of the screen
		if (enemies[j].x < 2048 / 2 && !enemies[j].passedMiddle) {
			enemies[j].passedMiddle = true;
			// Allow new enemy to spawn when current enemy passes the middle
			canSpawn = true;
		}
		if (player.intersects(enemies[j])) {
			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());
		}
	}
};
// Handle player jump
game.down = function (x, y, obj) {
	player.jump();
};
// Import tween plugin for animations