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

/**** 
* Classes
****/ 
var EnemyCar = Container.expand(function () {
	var self = Container.call(this);
	// Randomly select car type
	var carTypes = ['enemyCar1', 'enemyCar2', 'enemyCar3'];
	var selectedType = carTypes[Math.floor(Math.random() * carTypes.length)];
	var carGraphics = self.attachAsset(selectedType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.checkedNearMiss = false;
	self.isCrashed = false;
	self.update = function () {
		// Don't move if this specific car crashed
		if (self.isCrashed) {
			return;
		}
		self.y += self.speed;
	};
	return self;
});
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('playerCar1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetX = 2048 / 2;
	self.currentX = 2048 / 2;
	self.update = function () {
		// Don't move if crashed
		if (crashed) {
			return;
		}
		// Smooth movement towards target position
		var diff = self.targetX - self.currentX;
		self.currentX += diff * 0.15;
		self.x = self.currentX;
	};
	return self;
});
var RoadLine = Container.expand(function () {
	var self = Container.call(this);
	var lineGraphics = self.attachAsset('roadLine', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var SmokeParticle = Container.expand(function () {
	var self = Container.call(this);
	var smokeGraphics = self.attachAsset('smokeParticle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedX = (Math.random() - 0.5) * 8;
	self.speedY = -Math.random() * 5 - 2;
	self.life = 300; // 5 seconds at 60fps
	self.maxLife = 300;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
		self.speedY += 0.2; // gravity
		self.speedX *= 0.98; // air resistance
		self.life--;
		var fadeAmount = self.life / self.maxLife;
		self.alpha = fadeAmount;
		self.scaleX = 1 + (1 - fadeAmount) * 2;
		self.scaleY = 1 + (1 - fadeAmount) * 2;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2d2d2d
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var enemyCars = [];
var roadLines = [];
var gameSpeed = 1;
var distanceScore = 0;
var bonusScore = 0;
var totalScore = 0;
var spawnTimer = 0;
var roadLineTimer = 0;
var speedIncreaseTimer = 0;
var smokeParticles = [];
var crashed = false;
var crashTimer = 0;
// Difficulty system
var currentDifficulty = 'medium'; // 'easy', 'medium', 'hard'
var gameStarted = false;
var difficultySettings = {
	easy: {
		initialSpeed: 1.0,
		speedIncrease: 0.1,
		spawnRateBase: 80,
		enemySpeedMultiplier: 1.0,
		speedIncreaseInterval: 900 // 15 seconds
	},
	medium: {
		initialSpeed: 2.0,
		speedIncrease: 0.2,
		spawnRateBase: 60,
		enemySpeedMultiplier: 2.0,
		speedIncreaseInterval: 600 // 10 seconds
	},
	hard: {
		initialSpeed: 5.0,
		speedIncrease: 0.3,
		spawnRateBase: 25,
		enemySpeedMultiplier: 5.0,
		speedIncreaseInterval: 300 // 5 seconds
	}
};
// Lane positions
var lanes = [400, 700, 1000, 1300, 1648];
var laneCount = 5;
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
var speedTxt = new Text2('Speed: 1x', {
	size: 60,
	fill: 0xFFFF00
});
speedTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(speedTxt);
speedTxt.x = -50;
speedTxt.y = 50;
// Difficulty selection UI
var difficultyTxt = new Text2('Select Difficulty', {
	size: 100,
	fill: 0xFFFFFF
});
difficultyTxt.anchor.set(0.5, 0.5);
difficultyTxt.x = 2048 / 2;
difficultyTxt.y = 800;
game.addChild(difficultyTxt);
var easyBtn = new Text2('EASY', {
	size: 80,
	fill: 0x00FF00
});
easyBtn.anchor.set(0.5, 0.5);
easyBtn.x = 2048 / 2 - 300;
easyBtn.y = 1200;
game.addChild(easyBtn);
var mediumBtn = new Text2('MEDIUM', {
	size: 80,
	fill: 0xFFFF00
});
mediumBtn.anchor.set(0.5, 0.5);
mediumBtn.x = 2048 / 2;
mediumBtn.y = 1200;
game.addChild(mediumBtn);
var hardBtn = new Text2('HARD', {
	size: 80,
	fill: 0xFF0000
});
hardBtn.anchor.set(0.5, 0.5);
hardBtn.x = 2048 / 2 + 300;
hardBtn.y = 1200;
game.addChild(hardBtn);
var instructionTxt = new Text2('Touch a difficulty to start!', {
	size: 60,
	fill: 0xCCCCCC
});
instructionTxt.anchor.set(0.5, 0.5);
instructionTxt.x = 2048 / 2;
instructionTxt.y = 1400;
game.addChild(instructionTxt);
// Initialize player
player = game.addChild(new PlayerCar());
player.x = 2048 / 2;
player.y = 2200;
player.alpha = 0.3; // Make player semi-transparent during difficulty selection
// Difficulty button handlers
easyBtn.down = function (x, y, obj) {
	startGameWithDifficulty('easy');
};
mediumBtn.down = function (x, y, obj) {
	startGameWithDifficulty('medium');
};
hardBtn.down = function (x, y, obj) {
	startGameWithDifficulty('hard');
};
function startGameWithDifficulty(difficulty) {
	currentDifficulty = difficulty;
	gameStarted = true;
	gameSpeed = difficultySettings[currentDifficulty].initialSpeed;
	// Hide difficulty selection UI
	difficultyTxt.alpha = 0;
	easyBtn.alpha = 0;
	mediumBtn.alpha = 0;
	hardBtn.alpha = 0;
	instructionTxt.alpha = 0;
	// Make player fully visible
	player.alpha = 1;
	// Update speed display
	speedTxt.setText('Speed: ' + gameSpeed.toFixed(1) + 'x');
	// Show difficulty indicator
	var difficultyIndicator = new Text2('Difficulty: ' + currentDifficulty.toUpperCase(), {
		size: 50,
		fill: currentDifficulty === 'easy' ? 0x00FF00 : currentDifficulty === 'medium' ? 0xFFFF00 : 0xFF0000
	});
	difficultyIndicator.anchor.set(0, 0);
	LK.gui.topLeft.addChild(difficultyIndicator);
	difficultyIndicator.x = 120;
	difficultyIndicator.y = 20;
}
// Touch controls
var isDragging = false;
game.down = function (x, y, obj) {
	if (gameStarted) {
		isDragging = true;
		player.targetX = x;
	}
};
game.move = function (x, y, obj) {
	if (isDragging && gameStarted) {
		// Constrain to lanes
		var clampedX = Math.max(lanes[0], Math.min(lanes[lanes.length - 1], x));
		player.targetX = clampedX;
	}
};
game.up = function (x, y, obj) {
	if (gameStarted) {
		isDragging = false;
	}
};
// Helper functions
function spawnEnemyCar() {
	var enemy = new EnemyCar();
	var laneIndex = Math.floor(Math.random() * lanes.length);
	enemy.x = lanes[laneIndex];
	enemy.y = -100;
	enemy.speed = 8 + gameSpeed * difficultySettings[currentDifficulty].enemySpeedMultiplier;
	enemyCars.push(enemy);
	game.addChild(enemy);
}
function spawnRoadLine() {
	var line = new RoadLine();
	line.x = 2048 / 2;
	line.y = -50;
	line.speed = 10 + gameSpeed * 2;
	roadLines.push(line);
	game.addChild(line);
}
function checkNearMiss(enemy) {
	if (!enemy.checkedNearMiss) {
		var distance = Math.abs(player.x - enemy.x);
		var verticalDistance = Math.abs(player.y - enemy.y);
		if (distance < 150 && verticalDistance < 200) {
			enemy.checkedNearMiss = true;
			bonusScore += 10;
			totalScore += 10;
			// Visual effect for near miss
			LK.effects.flashObject(enemy, 0xffff00, 200);
			LK.getSound('nearMiss').play();
			return true;
		}
	}
	return false;
}
function updateScore() {
	distanceScore = Math.floor(LK.ticks / 10);
	totalScore = distanceScore + bonusScore;
	LK.setScore(totalScore);
	scoreTxt.setText('Score: ' + totalScore);
}
function createSmokeEffect(x, y) {
	for (var i = 0; i < 15; i++) {
		var smoke = new SmokeParticle();
		smoke.x = x + (Math.random() - 0.5) * 60;
		smoke.y = y + (Math.random() - 0.5) * 60;
		smokeParticles.push(smoke);
		game.addChild(smoke);
	}
}
function updateSpeed() {
	speedIncreaseTimer++;
	var interval = difficultySettings[currentDifficulty].speedIncreaseInterval;
	if (speedIncreaseTimer >= interval) {
		gameSpeed += difficultySettings[currentDifficulty].speedIncrease;
		speedIncreaseTimer = 0;
		speedTxt.setText('Speed: ' + gameSpeed.toFixed(1) + 'x');
	}
}
// Main game loop
game.update = function () {
	if (!gameStarted) {
		return; // Don't update game logic until difficulty is selected
	}
	// Handle crash timer
	if (crashed) {
		crashTimer++;
		if (crashTimer >= 180) {
			// 3 seconds at 60fps
			LK.showGameOver();
			return;
		}
		// Continue updating smoke during crash
		for (var k = smokeParticles.length - 1; k >= 0; k--) {
			var smoke = smokeParticles[k];
			if (smoke.life <= 0) {
				smoke.destroy();
				smokeParticles.splice(k, 1);
			}
		}
		return; // Don't update other game logic during crash
	}
	updateScore();
	updateSpeed();
	// Spawn enemy cars
	spawnTimer++;
	var baseSpawnRate = difficultySettings[currentDifficulty].spawnRateBase;
	var speedMultiplier = currentDifficulty === 'hard' ? 15 : 10; // More aggressive scaling for hard mode
	var spawnRate = Math.max(baseSpawnRate - gameSpeed * speedMultiplier, currentDifficulty === 'hard' ? 10 : 20); // Lower minimum for hard mode
	if (spawnTimer >= spawnRate) {
		spawnEnemyCar();
		spawnTimer = 0;
	}
	// Spawn road lines
	roadLineTimer++;
	if (roadLineTimer >= 20) {
		spawnRoadLine();
		roadLineTimer = 0;
	}
	// Update and check enemy cars
	for (var i = enemyCars.length - 1; i >= 0; i--) {
		var enemy = enemyCars[i];
		// Check for collision
		if (enemy.intersects(player) && !crashed) {
			// Set crash state
			crashed = true;
			crashTimer = 0;
			// Mark both cars as crashed
			enemy.isCrashed = true;
			// Create smoke effect at crash location
			createSmokeEffect(player.x, player.y);
			// Flash screen and play sound
			LK.effects.flashScreen(0xff0000, 1000);
			LK.getSound('crash').play();
			// Stop player movement
			player.targetX = player.x;
		}
		// Don't update enemy cars if crashed
		if (!crashed) {
			// Check for near miss
			checkNearMiss(enemy);
		}
		// Remove off-screen enemies
		if (enemy.y > 2800) {
			enemy.destroy();
			enemyCars.splice(i, 1);
		}
	}
	// Update and clean up road lines
	for (var j = roadLines.length - 1; j >= 0; j--) {
		var line = roadLines[j];
		if (line.y > 2800) {
			line.destroy();
			roadLines.splice(j, 1);
		}
	}
	// Update and clean up smoke particles (only when not crashed)
	if (!crashed) {
		for (var k = smokeParticles.length - 1; k >= 0; k--) {
			var smoke = smokeParticles[k];
			if (smoke.life <= 0) {
				smoke.destroy();
				smokeParticles.splice(k, 1);
			}
		}
	}
};