/**** 
* 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,
		width: 200,
		height: 200
	});
	self.speed = 6.25;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -10) {
			self.destroy();
		}
	};
});
// Define a class for the far background layer
var FarBackground = Container.expand(function () {
	var self = Container.call(this);
	var farBackgroundGraphics = self.attachAsset('farBackground', {
		anchorX: 0,
		anchorY: 0,
		height: 2732 / 1.8 // Half of the screen height
	});
	self.speed = 1;
	self.update = function () {
		self.x -= self.speed;
		if (self.x <= -2048) {
			if (self === farBackground1) {
				self.x = farBackground2.x + 2048;
			} else if (self === farBackground2) {
				self.x = farBackground1.x + 2048;
			}
		}
	};
});
// Define a class for flying enemies
var FlyingEnemy = Container.expand(function () {
	var self = Container.call(this);
	var flyingEnemyGraphics = self.attachAsset('flyingEnemy', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 200,
		height: 200
	});
	self.speed = 8.75; // Faster speed for flying enemies
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -10) {
			self.destroy();
		}
	};
});
// Define a class for the ground layer of the background
var Ground = Container.expand(function () {
	var self = Container.call(this);
	var groundGraphics = self.attachAsset('ground', {
		anchorX: 0,
		anchorY: 0,
		height: 2732 / 1.9 // Half of the screen height
	});
	self.speed = 6.25;
	self.update = function () {
		self.x -= self.speed;
		self.y = 2732 / 2.1; // Player's y position
		if (self.x <= -2040) {
			if (self === ground1) {
				self.x = ground2.x + 2040;
			} else if (self === ground2) {
				self.x = ground1.x + 2040;
			}
		}
	};
});
// Define a class for the near background layer
var NearBackground = Container.expand(function () {
	var self = Container.call(this);
	var nearBackgroundGraphics = self.attachAsset('nearBackground', {
		anchorX: 0,
		anchorY: 0,
		height: 2732 / 1.8 // Half of the screen height
	});
	self.speed = 3;
	self.update = function () {
		self.x -= self.speed;
		if (self.x <= -2048) {
			if (self === nearBackground1) {
				self.x = nearBackground2.x + 2048;
			} else if (self === nearBackground2) {
				self.x = nearBackground1.x + 2048;
			}
		}
	};
});
//<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 = 6.25;
	self.jumpHeight = 40;
	self.isJumping = false;
	self.velocityY = 0;
	self.update = function () {
		if (self.isJumping) {
			self.y += self.velocityY;
			self.velocityY += 0.7; // Decreased gravity effect by 30%
			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
****/ 
// Play background music
LK.playMusic('backgroundMusic');
// Initialize the ground layer
var ground1 = new Ground();
ground1.x = 0;
ground1.y = 2732; // Position at the bottom of the screen
var ground2 = new Ground();
ground2.x = 2048;
ground2.y = 2732; // Position at the bottom of the screen
// Initialize the near background layer
var nearBackground1 = game.addChild(new NearBackground());
nearBackground1.x = 0;
nearBackground1.y = 0;
var nearBackground2 = game.addChild(new NearBackground());
nearBackground2.x = 2048;
nearBackground2.y = 0;
// Initialize the far background layer
var farBackground1 = game.addChild(new FarBackground());
farBackground1.x = 0;
farBackground1.y = 0;
var farBackground2 = game.addChild(new FarBackground());
farBackground2.x = 2048;
farBackground2.y = 0;
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 4; // Position player closer to the left side of the screen
player.y = 2732 / 2;
// Initialize enemies
var enemies = [];
var enemySpawnInterval = 100;
var enemySpawnCounter = 0;
// 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 right of the screen
LK.gui.topRight.addChild(scoreText);
scoreText.x = -150;
scoreText.y = 0;
// Move score text to the top layer
LK.gui.topRight.setChildIndex(scoreText, LK.gui.topRight.children.length - 1);
// Handle game updates
game.update = function () {
	// Increase speed as time progresses
	var speedIncrease = Math.floor(LK.ticks / 1000) * 2.5; // Increase the speed increase rate by 50%
	nearBackground1.speed = (1 + speedIncrease) * 0.5; // Decrease speed for nearBackground for parallax effect
	nearBackground2.speed = (1 + speedIncrease) * 0.5; // Decrease speed for nearBackground for parallax effect
	farBackground1.speed = (1 + speedIncrease) * 1.5; // Increase speed for farBackground for parallax effect
	farBackground2.speed = (1 + speedIncrease) * 1.5; // Increase speed for farBackground for parallax effect
	player.speed = 5 + speedIncrease;
	ground1.speed = 5 + speedIncrease;
	ground2.speed = 5 + speedIncrease;
	nearBackground1.update();
	nearBackground2.update();
	farBackground1.update();
	farBackground2.update();
	player.update();
	ground1.update();
	ground2.update();
	game.addChild(ground1);
	game.addChild(ground2);
	// Spawn enemies
	enemySpawnCounter++;
	if (enemySpawnCounter >= enemySpawnInterval) {
		var enemy = new Enemy();
		enemy.x = 2100; // Ensure enemy spawns from off screen
		enemy.y = 2732 / 2;
		enemy.speed = 5 + speedIncrease; // Increase enemy speed
		enemies.push(enemy);
		game.addChild(enemy);
		// Spawn flying enemies with a 20% chance
		if (Math.random() < 0.2) {
			var flyingEnemy = new FlyingEnemy();
			flyingEnemy.x = 2100 + Math.random() * 100; // Ensure flying enemy spawns from off screen
			flyingEnemy.y = Math.random() * (2732 / 3 - 100) + 100; // Random height for flying enemy spawn
			flyingEnemy.speed = 7 + speedIncrease; // Increase flying enemy speed
			enemies.push(flyingEnemy);
			game.addChild(flyingEnemy);
		}
		// If score is 5 or more, spawn another row of enemies in the air with reduced frequency
		if (LK.getScore() >= 5 && Math.random() < 0.3) {
			// 30% chance to spawn air enemy
			var airEnemy = new Enemy();
			airEnemy.x = 2100 + Math.random() * 100; // Ensure air enemy spawns from off screen
			airEnemy.y = Math.random() * (2732 / 3 - 100) + 100; // Reduce maximum height for air enemy spawn
			airEnemy.speed = 5 + speedIncrease; // Increase enemy speed
			enemies.push(airEnemy);
			game.addChild(airEnemy);
		}
		// 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();
		if (player.intersects(enemies[j])) {
			// Spawn explosion effect at the player's position if not already present
			if (!game.explosion) {
				game.explosion = LK.getAsset('explosion', {
					x: player.x,
					y: player.y,
					anchorX: 0.5,
					anchorY: 0.5,
					scaleX: 0.1,
					// Start scale at 0.1%
					scaleY: 0.1 // Start scale at 0.1%
				});
				game.addChild(game.explosion);
			}
			// Use tween to scale existing explosion from 0.1% to 100% over 0.5 seconds
			tween(game.explosion, {
				scaleX: 50,
				scaleY: 50
			}, {
				duration: 500,
				easing: tween.easeOut
			});
			// Play explosion sound effect
			LK.getSound('explosionSound').play();
			// Wait 1 second before showing the game over screen
			LK.setTimeout(function () {
				LK.effects.flashScreen(0xff0000, 500);
				LK.showGameOver();
			}, 500);
		} else if (player.x > enemies[j].x && !enemies[j].passed) {
			// Play sound effect for successful jump over an enemy
			LK.getSound('jumpSuccessSound').play();
			enemies[j].passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreText.setText(LK.getScore());
			// Move player further to the right as they score more points
			player.x = Math.min(2048 * 3.0, 2048 / 4 + LK.getScore() * (2048 * 3.0 - 2048 / 4) / 100); // Move player all the way to the right of the screen once they have gotten 100 points
		}
	}
};
// Handle player jump
game.down = function (x, y, obj) {
	player.jump();
	player.speed += 0.5; // Increase player speed for every successful jump
};