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

/**** 
* Classes
****/ 
// Coin
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coin = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = coin.width;
	self.height = coin.height;
	self.speed = 28;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy Car
var EnemyCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('enemyCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = car.width;
	self.height = car.height;
	self.speed = 28 + Math.random() * 8;
	self.lane = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Player Car
var PlayerCar = Container.expand(function () {
	var self = Container.call(this);
	var car = self.attachAsset('playerCar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = car.width;
	self.height = car.height;
	self.lane = 1; // 0: left, 1: center, 2: right
	self.invincible = false;
	self.update = function () {
		// No movement here; handled by input
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x222222
});

/**** 
* Game Code
****/ 
// Road and lanes setup
// Car (player)
// Enemy car
// Coin collectible
// Fuel collectible
// Road lane
// Road background
var roadWidth = 900;
var laneCount = 3;
var laneWidth = roadWidth / laneCount;
var roadX = (2048 - roadWidth) / 2;
var roadY = 0;
// Road background
var road = LK.getAsset('road', {
	anchorX: 0,
	anchorY: 0,
	x: roadX,
	y: roadY
});
game.addChild(road);
// Lane markers
var laneMarkers = [];
for (var i = 1; i < laneCount; i++) {
	var laneMarker = LK.getAsset('lane', {
		anchorX: 0.5,
		anchorY: 0,
		x: roadX + i * laneWidth,
		y: 0
	});
	game.addChild(laneMarker);
	laneMarkers.push(laneMarker);
}
// Player car
var player = new PlayerCar();
player.x = roadX + laneWidth * 1.5;
player.y = 2732 - 400;
game.addChild(player);
// Score and fuel UI
var score = 0;
var distance = 0;
var coinsCollected = 0;
var scoreTxt = new Text2('Score: 0', {
	size: 90,
	fill: "#fff"
});
scoreTxt.anchor.set(1, 0); // top right
scoreTxt.x = 2048 - 100;
scoreTxt.y = 20;
LK.gui.top.addChild(scoreTxt);
// Remove coinsTxt, show only score at top right
// Timer to update score every second
var scoreUpdateTimer = LK.setInterval(function () {
	scoreTxt.setText('Score: ' + score);
}, 1000);
// Lane positions
var lanePositions = [roadX + laneWidth * 0.5, roadX + laneWidth * 1.5, roadX + laneWidth * 2.5];
// Touch controls
// Use square placeholder assets for left/right buttons (replace 'leftBtnSquare' and 'rightBtnSquare' with your asset ids when available)
var leftBtn = LK.getAsset('leftBtnSquare', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 200,
	y: -250
});
LK.gui.bottomLeft.addChild(leftBtn);
var rightBtn = LK.getAsset('rightBtnSquare', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: -200,
	y: -250
});
LK.gui.bottomRight.addChild(rightBtn);
// Control handlers
leftBtn.down = function () {
	if (player.lane > 0) {
		player.lane--;
		tween(player, {
			x: lanePositions[player.lane]
		}, {
			duration: 120,
			easing: tween.cubicOut
		});
	}
};
rightBtn.down = function () {
	if (player.lane < laneCount - 1) {
		player.lane++;
		tween(player, {
			x: lanePositions[player.lane]
		}, {
			duration: 120,
			easing: tween.cubicOut
		});
	}
};
// Touch drag to move car left/right
var dragStartX = null;
var dragStartLane = null;
game.down = function (x, y, obj) {
	if (x > roadX && x < roadX + roadWidth && y > 2732 - 700) {
		dragStartX = x;
		dragStartLane = player.lane;
	}
};
game.move = function (x, y, obj) {
	if (dragStartX !== null) {
		var dx = x - dragStartX;
		if (Math.abs(dx) > laneWidth * 0.7) {
			if (dx < 0 && player.lane > 0) {
				player.lane--;
				tween(player, {
					x: lanePositions[player.lane]
				}, {
					duration: 120,
					easing: tween.cubicOut
				});
				dragStartX = x;
				dragStartLane = player.lane;
			} else if (dx > 0 && player.lane < laneCount - 1) {
				player.lane++;
				tween(player, {
					x: lanePositions[player.lane]
				}, {
					duration: 120,
					easing: tween.cubicOut
				});
				dragStartX = x;
				dragStartLane = player.lane;
			}
		}
	}
};
game.up = function (x, y, obj) {
	dragStartX = null;
	dragStartLane = null;
};
// Game objects
var enemies = [];
var coins = [];
var fuels = []; // (no longer used, but kept for code safety)
// Spawning timers
var enemySpawnTick = 0;
var coinSpawnTick = 0;
var fuelSpawnTick = 0;
// Main game update
game.update = function () {
	// Distance and fuel
	distance += 1;
	player.fuel -= 0.025;
	if (player.fuel < 0) player.fuel = 0;
	// Update UI
	score = Math.floor(distance / 5) + coinsCollected * 10;
	if (score >= 999) {
		// Stop the score update timer
		if (typeof scoreUpdateTimer !== "undefined") LK.clearInterval(scoreUpdateTimer);
		// Show Congratulations overlay
		var congratsTxt = new Text2('Congratulations', {
			size: 180,
			fill: 0xFFD600
		});
		congratsTxt.anchor.set(0.5, 0.5);
		congratsTxt.x = 2048 / 2;
		congratsTxt.y = 900;
		var playAgainBtn = new Text2('Play Again', {
			size: 120,
			fill: "#fff"
		});
		playAgainBtn.anchor.set(0.5, 0.5);
		playAgainBtn.x = 2048 / 2;
		playAgainBtn.y = 1200;
		// Overlay container
		var overlay = new Container();
		overlay.addChild(congratsTxt);
		overlay.addChild(playAgainBtn);
		game.addChild(overlay);
		playAgainBtn.down = function () {
			// Remove overlay and restart game
			overlay.destroy();
			LK.showGameOver(); // Triggers game reset
		};
		// Pause game logic
		game.update = function () {};
		return;
	}
	// Spawn enemy cars
	enemySpawnTick++;
	if (enemySpawnTick > 38 + Math.random() * 18) {
		enemySpawnTick = 0;
		var enemy = new EnemyCar();
		enemy.lane = Math.floor(Math.random() * laneCount);
		enemy.x = lanePositions[enemy.lane];
		enemy.y = -200;
		enemies.push(enemy);
		game.addChild(enemy);
	}
	// Spawn coins
	coinSpawnTick++;
	if (coinSpawnTick > 80 + Math.random() * 60) {
		coinSpawnTick = 0;
		var coin = new Coin();
		coin.lane = Math.floor(Math.random() * laneCount);
		coin.x = lanePositions[coin.lane];
		coin.y = -120;
		coins.push(coin);
		game.addChild(coin);
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		if (e.y > 2732 + 200) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Collision with player
		if (e.intersects(player)) {
			LK.effects.flashObject(player, 0xff0000, 600);
			LK.effects.flashScreen(0xff0000, 800);
			LK.showGameOver();
			return;
		}
	}
	// Update coins
	for (var i = coins.length - 1; i >= 0; i--) {
		var c = coins[i];
		c.update();
		if (c.y > 2732 + 120) {
			c.destroy();
			coins.splice(i, 1);
			continue;
		}
		if (c.intersects(player)) {
			coinsCollected++;
			score = Math.floor(distance / 5) + coinsCollected * 10;
			scoreTxt.setText('Score: ' + score);
			LK.effects.flashObject(player, 0xFFD600, 300);
			c.destroy();
			coins.splice(i, 1);
			continue;
		}
	}
};
// Center UI elements
// scoreTxt is always at top right, do not move it to center
// Prevent UI from overlapping top left menu
// (already handled by not placing anything at gui.topLeft or at x < 100, y < 100)