/**** 
* Classes
****/ 
// Bruiser class representing a tougher enemy
var Bruiser = Container.expand(function () {
	var self = Container.call(this);
	var bruiserGraphics = self.attachAsset('Bruiser', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.HitPoints = 10; // Higher hit points for Bruiser
	self.speed = 1.5; // Slower speed compared to Drone
	self.update = function () {
		// Implement heavy mech movement
		var stepCycle = LK.ticks % 72; // 1.2 seconds at 60 FPS
		if (stepCycle < 36) {
			self.y += self.speed * 0.5; // Slow rise
			self.x += Math.sin(LK.ticks / 20) * 0.5; // Slight side-to-side sway
		} else {
			self.y += self.speed * 2; // Sharp down movement
			self.x -= Math.sin(LK.ticks / 20) * 0.5; // Slight side-to-side sway
			if (stepCycle === 36) {
				LK.effects.flashScreen(0xff0000, 100); // Brief screen shake effect using flashScreen
			}
		}
		self.rotation = Math.sin(LK.ticks / 20) * 0.1; // Slight forward lean during movement
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// BruiserPiece class for bruiser destruction effect
var BruiserPiece = Container.expand(function (assetType) {
	var self = Container.call(this);
	var pieceGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = Math.random() * 4 - 2; // Random horizontal speed
	self.speedY = Math.random() * 4 - 2; // Random vertical speed
	self.alphaDecay = 0.02; // Rate at which the piece fades out
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		pieceGraphics.alpha -= self.alphaDecay;
		if (pieceGraphics.alpha <= 0) {
			self.destroy();
		}
	};
});
// Enemy class representing the enemy robots
var Drone = Container.expand(function () {
	var self = Container.call(this);
	var droneGraphics = self.attachAsset('Drone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.HitPoints = 3;
	self.randomOffset = Math.random() * 100; // Random timing for each drone
	self.speed = 2.25;
	self.update = function () {
		// Add robotic hover effects
		self.y += self.speed * (Math.random() > 0.1 ? 1 : 0); // Brief pauses in downward movement
		self.x += Math.sin(LK.ticks / 10 + self.randomOffset) * 2; // Small jerky side-to-side movements
		if (Math.random() > 0.95) {
			self.x += Math.random() * 4 - 2; // Quick position corrections
		}
		// Pulse effect on hit
		if (self.pulseEffect) {
			droneGraphics.scale.x = 1.2;
			droneGraphics.scale.y = 1.2;
			self.pulseEffect = false;
		} else {
			droneGraphics.scale.x = 1.0;
			droneGraphics.scale.y = 1.0;
		}
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// DronePiece class for drone destruction effect
var DronePiece = Container.expand(function (assetType) {
	var self = Container.call(this);
	var pieceGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = Math.random() * 4 - 2; // Random horizontal speed
	self.speedY = Math.random() * 4 - 2; // Random vertical speed
	self.alphaDecay = 0.02; // Rate at which the piece fades out
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		pieceGraphics.alpha -= self.alphaDecay;
		if (pieceGraphics.alpha <= 0) {
			self.destroy();
		}
	};
});
// Dust class for dust particles
var Dust = Container.expand(function () {
	var self = Container.call(this);
	var dustGraphics = self.attachAsset('Dust', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	dustGraphics.alpha = 0.75;
	self.speed = Math.random() * 3 + 1;
	self.rotationSpeed = Math.random() * 0.02 - 0.01; // Random rotation speed between -0.01 and 0.01
	self.direction = Math.random() * Math.PI * 0.5;
	self.update = function () {
		self.y += self.speed;
		self.x += Math.sin(self.direction) * self.speed; // Add slight X travel based on direction
		self.rotation += self.rotationSpeed; // Add rotation
		dustGraphics.alpha -= 0.01; // fade out at a medium pace
		if (self.y > 2732 || dustGraphics.alpha <= 0) {
			self.destroy();
		}
	};
});
// Assets will be automatically created and loaded by the LK engine based on their usage in the code.
// Hero class representing the player's spaceship
var Hero = Container.expand(function () {
	var self = Container.call(this);
	self.prevX = self.x; // Initialize prevX with the current x position
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		if (self.y > 2375) {
			self.y -= self.speed;
		}
		// Add rotation based on movement direction
		if (self.x > self.prevX) {
			self.rotation += Math.PI / 180 * 1; // Rotate 1 degree to the right
			if (self.rotation > Math.PI / 180 * 5) {
				self.rotation = Math.PI / 180 * 5;
			}
		} else if (self.x < self.prevX) {
			self.rotation -= Math.PI / 180 * 1; // Rotate 1 degree to the left
			if (self.rotation < Math.PI / 180 * -5) {
				self.rotation = Math.PI / 180 * -5;
			}
		} else {
			if (self.rotation > 0) {
				self.rotation -= Math.PI / 180 * 1;
				if (self.rotation < 0) {
					self.rotation = 0;
				}
			} else if (self.rotation < 0) {
				self.rotation += Math.PI / 180 * 1;
				if (self.rotation > 0) {
					self.rotation = 0;
				}
			}
		}
		self.prevX = self.x; // Store the current x position for the next frame
		// Add scale change to simulate footsteps
		if (LK.ticks % 24 < 12) {
			self.scale.x = 1.02;
		} else {
			self.scale.x = 0.98;
		}
	};
});
// Bullet class for hero's bullets
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	self.Type = 'standard'; // Default type for bullets
	self.Power = 1; // Default power level for bullets
	self.update = function () {
		self.y += self.speed;
		if (self.y < 0) {
			self.destroy();
		}
	};
});
// RailingLeft class for the scrolling left railing
var RailingLeft = Container.expand(function (assetType) {
	var self = Container.call(this);
	var railingGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0
	});
	self.speed = 2;
	self.update = function () {
		self.y += self.speed;
		if (self.y >= 2732) {
			self.y = -2732;
		}
	};
});
// RailingRight class for the scrolling right railing
var RailingRight = Container.expand(function (assetType) {
	var self = Container.call(this);
	var railingGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0
	});
	self.speed = 2;
	self.update = function () {
		self.y += self.speed;
		if (self.y >= 2732) {
			self.y = -2732;
		}
	};
});
// RoadScroll class for the scrolling road
var RoadScroll = Container.expand(function (assetType) {
	var self = Container.call(this);
	var roadGraphics = self.attachAsset(assetType, {
		anchorX: 0.5,
		anchorY: 0
	});
	if (assetType === 'CityBackgroundHD') {
		self.speed = 1;
	} else {
		self.speed = 2;
	}
	self.update = function () {
		self.y += self.speed;
		if (self.y >= 2732) {
			self.y = -2732;
		}
	};
});
// TitleScreen class for the title screen
var TitleScreen = Container.expand(function () {
	var self = Container.call(this);
	// Attach game logo
	var logo = self.attachAsset('GameLogoHD', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	logo.x = 2048 / 2;
	logo.y = 2732 / 2 - 200;
	// Attach play button
	var playButton = self.attachAsset('PlayButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	playButton.x = 2048 / 2;
	playButton.y = logo.y + logo.height / 2 + playButton.height / 2 + 50;
	// Event handler for play button
	playButton.down = function (x, y, obj) {
		isTitle = false;
		isStarted = true;
		self.destroy();
		startGame();
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 //Init game with black background
});

/**** 
* Game Code
****/ 
// Initialize the city background for parallax effect
var cityBackground1 = game.addChild(new RoadScroll('CityBackgroundHD'));
var cityBackground2 = game.addChild(new RoadScroll('CityBackgroundHD'));
cityBackground1.x = 2048 / 2;
cityBackground2.x = 2048 / 2;
cityBackground1.y = 0;
cityBackground2.y = -2732;
// Initialize the road instances
var road1 = game.addChild(new RoadScroll('Road'));
var road2 = game.addChild(new RoadScroll('Road2'));
road2.x = 2048 / 2;
road1.x = 2048 / 2;
road1.y = 0;
road2.y = -2732;
// Initialize the left railing instances
var railingLeft1 = game.addChild(new RailingLeft('RailingStart'));
var railingLeft2 = game.addChild(new RailingLeft('RailingEnd'));
railingLeft1.x = 2048 * 0.16;
railingLeft2.x = 2048 * 0.16;
railingLeft1.y = 0;
railingLeft2.y = -2732;
// Initialize the right railing instances
var railingRight1 = game.addChild(new RailingRight('RailingEnd'));
var railingRight2 = game.addChild(new RailingRight('RailingStart'));
railingRight1.x = 2048 * 0.81; // Moved left by 3%
railingRight2.x = 2048 * 0.81; // Moved left by 3%
railingRight1.y = 0;
railingRight2.y = -2732;
// Initialize game state variables
var isTitle = true;
var isStarted = false;
// Initialize title screen
if (isTitle) {
	var titleScreen = game.addChild(new TitleScreen());
}
// Function to start the game
function startGame() {
	// Initialize hero
	hero = game.addChild(new Hero());
	hero.x = 2048 / 2;
	hero.y = 2732 + hero.height;
	// Initialize enemies and bullets arrays
	enemies = [];
	heroBullets = [];
}
// Initialize variables
var hero;
var enemies = [];
var heroBullets = [];
// Function to handle game updates
game.update = function () {
	// Update the city background instances for parallax effect
	cityBackground1.update();
	cityBackground2.update();
	// Update the road instances
	road1.update();
	road2.update();
	// Update the left railing instances
	railingLeft1.update();
	railingLeft2.update();
	// Update the right railing instances
	railingRight1.update();
	railingRight2.update();
	if (isStarted) {
		if (dragNode) {
			hero.x = dragNode.x;
			hero.y = dragNode.y;
		}
		// Update enemies
		for (var i = enemies.length - 1; i >= 0; i--) {
			enemies[i].update();
			if (enemies[i].intersects(hero)) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
			}
		}
		// Update hero bullets
		for (var j = heroBullets.length - 1; j >= 0; j--) {
			heroBullets[j].update();
			for (var k = enemies.length - 1; k >= 0; k--) {
				if (heroBullets[j].intersects(enemies[k]) && enemies[k].y > 0) {
					enemies[k].HitPoints -= heroBullets[j].Power;
					// Apply an increased push back effect
					enemies[k].y -= 12; // Push the drone upwards slightly more
					enemies[k].pulseEffect = true; // Trigger pulse effect
					heroBullets[j].destroy();
					heroBullets.splice(j, 1);
					if (enemies[k].HitPoints <= 0) {
						if (enemies[k] instanceof Drone) {
							// Create drone pieces upon destruction
							var centerPiece = new DronePiece('DroneCenterPart');
							centerPiece.x = enemies[k].x;
							centerPiece.y = enemies[k].y;
							game.addChild(centerPiece);
							var leftPiece = new DronePiece('DroneLeftPart');
							leftPiece.x = enemies[k].x - 20;
							leftPiece.y = enemies[k].y;
							game.addChild(leftPiece);
							var rightPiece = new DronePiece('DroneRightPart');
							rightPiece.x = enemies[k].x + 20;
							rightPiece.y = enemies[k].y;
							game.addChild(rightPiece);
						} else if (enemies[k] instanceof Bruiser) {
							// Create bruiser pieces upon destruction
							var centerPiece = new BruiserPiece('BruiserCenterPart');
							centerPiece.x = enemies[k].x;
							centerPiece.y = enemies[k].y;
							game.addChild(centerPiece);
							var leftPiece = new BruiserPiece('BruiserLeftPart');
							leftPiece.x = enemies[k].x - 20;
							leftPiece.y = enemies[k].y;
							game.addChild(leftPiece);
							var rightPiece = new BruiserPiece('BruiserRightPart');
							rightPiece.x = enemies[k].x + 20;
							rightPiece.y = enemies[k].y;
							game.addChild(rightPiece);
						}
						enemies[k].destroy();
						enemies.splice(k, 1);
						LK.setScore(LK.getScore() + 1);
						scoreTxt.setText(LK.getScore());
					}
					break;
				}
			}
		}
		// Spawn Drones in groups of 2-3 within the Road area
		if (LK.ticks % 120 == 0) {
			var numberOfDrones = Math.floor(Math.random() * 2) + 2; // Randomly choose between 2 and 3 drones
			for (var i = 0; i < numberOfDrones; i++) {
				var newDrone = new Drone();
				newDrone.x = 2048 * 0.21 + Math.random() * (2048 * 0.55); // Adjusted x position within the Road area with 5% margin
				newDrone.y = -newDrone.height; // Start just outside the top of the screen
				enemies.push(newDrone);
				game.addChild(newDrone);
			}
		}
		// Spawn Bruisers occasionally
		if (LK.ticks % 360 == 0) {
			var newBruiser = new Bruiser();
			newBruiser.x = 2048 * 0.21 + Math.random() * (2048 * 0.55); // Adjusted x position within the Road area with 5% margin
			newBruiser.y = -newBruiser.height; // Start just outside the top of the screen
			enemies.push(newBruiser);
			game.addChild(newBruiser);
		}
		// Fire bullets
		if (LK.ticks % 18 == 0) {
			var newBullet = new HeroBullet();
			newBullet.x = hero.x;
			newBullet.y = hero.y - hero.height / 2;
			heroBullets.push(newBullet);
			game.addChild(newBullet);
		}
		// Generate dust particles in sync with player pulsing
		if (LK.ticks % 24 == 0) {
			var newDust = new Dust();
			newDust.x = hero.x - hero.width / 4; // Move dust spawn position right half as much as the last move
			newDust.y = hero.y + hero.height / 2 * 0.93; // Move dust spawn point up 3% more
			game.addChild(newDust);
		} else if (LK.ticks % 24 == 12) {
			var newDust = new Dust();
			newDust.x = hero.x + hero.width / 4; // Create another dust spawn point an equal distance in from the right of the player asset
			newDust.y = hero.y + hero.height / 2 * 0.93; // Move dust spawn point up 3% more
			game.addChild(newDust);
		}
	}
};
// Handle touch input for hero movement
var dragNode = null;
game.down = function (x, y, obj) {
	if (isStarted) {
		dragNode = {
			x: hero.x,
			y: hero.y
		};
		// Add a tilt-back effect during initial movement
		hero.rotation = x > hero.x ? Math.PI / 180 * -1 : Math.PI / 180 * 1;
	}
};
game.move = function (x, y, obj) {
	if (isStarted && dragNode) {
		// Add a slight delay to the drag control to make the player feel like it has more weight
		dragNode.x += (x - dragNode.x) * 0.1;
		dragNode.y = hero.y; // Lock the y position to the hero's initial y position
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Display score
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.setText(LK.getScore());