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

/**** 
* Classes
****/ 
// Coin
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGfx = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Lane: 0,1,2
	self.lane = 1;
	// For collision detection
	self.isCoin = true;
	return self;
});
// UI Elements class for start menu and instructions
var GameUI = Container.expand(function () {
	var self = Container.call(this);
	// (Title removed)
	// Create start button
	self.startBtn = new Container();
	var startBtnText = new Text2('START GAME', {
		size: 100,
		fill: 0xffffff
	});
	startBtnText.anchor.set(0.5, 0.5);
	self.startBtn.addChild(startBtnText);
	self.startBtn.x = 2048 / 2;
	self.startBtn.y = 1200;
	self.startBtn.interactive = true;
	self.addChild(self.startBtn);
	// Create how to play button
	self.instructionsBtn = new Container();
	var instBtnText = new Text2('HOW TO PLAY', {
		size: 100,
		fill: 0xffffff
	});
	instBtnText.anchor.set(0.5, 0.5);
	self.instructionsBtn.addChild(instBtnText);
	self.instructionsBtn.x = 2048 / 2;
	self.instructionsBtn.y = 1400;
	self.instructionsBtn.interactive = true;
	self.addChild(self.instructionsBtn);
	// Create instructions screen (initially hidden)
	self.instructions = new Container();
	self.instructions.visible = false;
	var instTitle = new Text2('HOW TO PLAY', {
		size: 120,
		fill: 0xFFFFFF
	});
	instTitle.anchor.set(0.5, 0);
	instTitle.x = 2048 / 2;
	instTitle.y = 600;
	self.instructions.addChild(instTitle);
	var instText1 = new Text2('• SWIPE LEFT/RIGHT to change lanes', {
		size: 80,
		fill: 0xFFFFFF
	});
	instText1.anchor.set(0.5, 0);
	instText1.x = 2048 / 2;
	instText1.y = 800;
	self.instructions.addChild(instText1);
	var instText2 = new Text2('• Avoid obstacles by changing lanes', {
		size: 80,
		fill: 0xFFFFFF
	});
	instText2.anchor.set(0.5, 0);
	instText2.x = 2048 / 2;
	instText2.y = 900;
	self.instructions.addChild(instText2);
	var instText4 = new Text2('• Collect coins for bonus points', {
		size: 80,
		fill: 0xFFFFFF
	});
	instText4.anchor.set(0.5, 0);
	instText4.x = 2048 / 2;
	instText4.y = 1000;
	self.instructions.addChild(instText4);
	// Back button for instructions
	self.backBtn = new Container();
	var backText = new Text2('BACK', {
		size: 80,
		fill: 0xFFFFFF
	});
	backText.anchor.set(0.5, 0.5);
	self.backBtn.addChild(backText);
	self.backBtn.x = 2048 / 2;
	self.backBtn.y = 1400;
	self.backBtn.interactive = true;
	self.instructions.addChild(self.backBtn);
	self.addChild(self.instructions);
	// Button press handlers
	self.startBtn.down = function () {
		tween(self.startBtn, {
			scaleX: 0.95,
			scaleY: 0.95
		}, {
			duration: 100
		});
	};
	self.startBtn.up = function () {
		tween(self.startBtn, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 100,
			onFinish: function onFinish() {
				if (typeof self.onStartClick === 'function') {
					self.onStartClick();
				}
			}
		});
	};
	self.instructionsBtn.down = function () {
		tween(self.instructionsBtn, {
			scaleX: 0.95,
			scaleY: 0.95
		}, {
			duration: 100
		});
	};
	self.instructionsBtn.up = function () {
		tween(self.instructionsBtn, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 100,
			onFinish: function onFinish() {
				if (typeof self.onInstructionsClick === 'function') {
					self.onInstructionsClick();
				}
			}
		});
	};
	self.backBtn.down = function () {
		tween(self.backBtn, {
			scaleX: 0.95,
			scaleY: 0.95
		}, {
			duration: 100
		});
	};
	self.backBtn.up = function () {
		tween(self.backBtn, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 100,
			onFinish: function onFinish() {
				if (typeof self.onBackClick === 'function') {
					self.onBackClick();
				}
			}
		});
	};
	// Set show/hide methods
	self.showMenu = function () {
		self.visible = true;
		self.startBtn.visible = true;
		self.instructionsBtn.visible = true;
		self.instructions.visible = false;
	};
	self.showInstructions = function () {
		self.visible = true;
		self.startBtn.visible = false;
		self.instructionsBtn.visible = false;
		self.instructions.visible = true;
	};
	self.hide = function () {
		self.visible = false;
	};
	return self;
});
// Obstacle
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsGfx = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Lane: 0,1,2
	self.lane = 1;
	// For collision detection
	self.isObstacle = true;
	return self;
});
// Runner (player character)
var Runner = Container.expand(function () {
	var self = Container.call(this);
	var runnerGfx = self.attachAsset('runner', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Current lane: 0 (left), 1 (center), 2 (right)
	self.lane = 1;
	self.moveToLane = function (lane, duration) {
		self.lane = lane;
		var targetX = laneToX(lane);
		tween(self, {
			x: targetX
		}, {
			duration: duration || 120,
			easing: tween.cubicOut,
			onFinish: function onFinish() {
				// (jumpIndicator logic removed)
			}
		});
	};
	// Called every frame by game.update
	self.update = function () {};
	return self;
});

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

/**** 
* Game Code
****/ 
// Button image assets
// --- ROAD BACKGROUND ---
// Character: Red box
// Obstacle: Gray box
// Coin: Yellow ellipse
var roadBg1 = LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0
});
roadBg1.x = 2048 / 2;
roadBg1.y = 0;
game.addChild(roadBg1);
var roadBg2 = LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0
});
roadBg2.x = 2048 / 2;
roadBg2.y = -2732;
game.addChild(roadBg2);
// --- LANE SYSTEM ---
var NUM_LANES = 3;
var LANE_WIDTH = 2048 / NUM_LANES; // Use full width
var LANE_START_X = LANE_WIDTH / 2; // Center of first lane at left edge
function laneToX(lane) {
	// lane: 0 (left), 1 (center), 2 (right)
	return LANE_START_X + lane * LANE_WIDTH;
}
// Game state manager
var GameState = {
	MENU: 0,
	INSTRUCTIONS: 1,
	PLAYING: 2
};
// --- GAMEPLAY VARIABLES ---
var runner;
var obstacles = [];
var coinObjects = []; // Array for coin instances
var speed = 18; // Initial speed (pixels per frame)
var speedIncrease = 0.012; // Speed up per tick
var spawnTimer = 0;
var coinSpawnTimer = 0;
var minObstacleGap = 420; // Minimum vertical gap between obstacles
var lastObstacleY = 0;
var isGameOver = false;
// Coin system variables
var coinCombo = 0;
var coinComboTimer = 0;
var coinComboTimeout = 60; // frames (1 second) to maintain combo
var coinComboText = null;
// Game state management
var currentState = GameState.MENU;
var gameUI = new GameUI();
game.addChild(gameUI);
// Setup UI event handlers
gameUI.onStartClick = function () {
	currentState = GameState.PLAYING;
	gameUI.hide();
	resetGame();
	// Show score and coin counter
	scoreTxt.visible = true;
	showCoinCounterAnimated();
};
gameUI.onInstructionsClick = function () {
	currentState = GameState.INSTRUCTIONS;
	gameUI.showInstructions();
};
gameUI.onBackClick = function () {
	currentState = GameState.MENU;
	gameUI.showMenu();
	coinCounter.visible = false;
};
// Initial setup
gameUI.showMenu();
// --- SCORE AND COINS ---
var score = 0;
var coins = 0; // Count of collected coins
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Hide score initially
scoreTxt.visible = false;
// Coin counter display
var coinCounter = new Container();
var coinIcon = LK.getAsset('coin', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.8,
	scaleY: 0.8
});
coinIcon.x = 60;
coinCounter.addChild(coinIcon);
var coinsTxt = new Text2('0', {
	size: 100,
	fill: 0xFFCC00
});
coinsTxt.anchor.set(0, 0.5);
coinsTxt.x = coinIcon.x + 80;
coinsTxt.y = coinIcon.y;
coinCounter.addChild(coinsTxt);
// Position the coin counter at the top left (avoid 0,0 for menu icon, so use x=120)
coinCounter.x = 120;
coinCounter.y = 120;
LK.gui.topLeft.addChild(coinCounter);
// Hide coin counter initially
coinCounter.visible = false;
// Animate coin counter entrance when shown
function showCoinCounterAnimated() {
	coinCounter.visible = true;
	coinCounter.alpha = 0;
	coinCounter.y = 60; // Start slightly above
	tween(coinCounter, {
		alpha: 1,
		y: 120
	}, {
		duration: 400,
		easing: tween.bounceOut
	});
}
// Function to reset game state
function resetGame() {
	// Clean up arrays
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].destroy();
	}
	for (var j = 0; j < coinObjects.length; j++) {
		coinObjects[j].destroy();
	}
	obstacles = [];
	coinObjects = [];
	isGameOver = false;
	speed = 18;
	score = 0;
	coins = 0;
	coinCombo = 0;
	coinComboTimer = 0;
	if (coinComboText) {
		coinComboText.destroy();
		coinComboText = null;
	}
	LK.setScore(0);
	scoreTxt.setText('0');
	coinsTxt.setText('0');
	runner.x = laneToX(1);
	runner.lane = 1;
	runner.y = 2732 - 400;
	runner.isJumping = false;
	spawnTimer = 0;
	coinSpawnTimer = 0;
	roadBg1.y = 0;
	roadBg2.y = -2732;
}
// --- INIT RUNNER ---
runner = new Runner();
runner.y = 2732 - 400;
runner.x = laneToX(1);
runner.lane = 1;
game.addChild(runner);
// --- INPUT HANDLING ---
var dragStartX = null;
var dragStartLane = null;
var dragActive = false;
// For jump hold logic
function handleMove(x, y, obj) {
	if (currentState !== GameState.PLAYING) return;
	if (dragActive && dragStartX !== null) {
		var dx = x - dragStartX;
		if (Math.abs(dx) > 120) {
			// Swipe detected
			if (dx > 0 && runner.lane < NUM_LANES - 1) {
				runner.moveToLane(runner.lane + 1);
				dragStartX = x;
			} else if (dx < 0 && runner.lane > 0) {
				runner.moveToLane(runner.lane - 1);
				dragStartX = x;
			}
		}
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	if (currentState !== GameState.PLAYING) return;
	dragActive = true;
	dragStartX = x;
	dragStartLane = runner.lane;
};
game.up = function (x, y, obj) {
	if (currentState !== GameState.PLAYING) return;
	dragActive = false;
	dragStartX = null;
	dragStartLane = null;
};
// --- TAP TO MOVE (for single taps) ---
game.tap = function (x, y, obj) {
	// Not supported by LK, so handled via down/up quick tap
	// (No implementation needed)
};
// --- SPAWN OBSTACLES & COINS ---
function spawnObstacle() {
	var lane = Math.floor(Math.random() * NUM_LANES);
	var obs = new Obstacle();
	obs.lane = lane;
	obs.x = laneToX(lane);
	obs.y = -180;
	obstacles.push(obs);
	game.addChild(obs);
	lastObstacleY = obs.y;
}
function spawnCoin() {
	// Prevent coins from spawning in the same lane and too close to obstacles, and at the same Y as obstacles
	var availableLanes = [0, 1, 2];
	var coinSpawnY = -120;
	// Remove lanes with obstacles too close to spawn Y or at the same Y
	for (var i = 0; i < obstacles.length; i++) {
		var obs = obstacles[i];
		// If obstacle is in the same lane and within 320px vertically of coin spawn Y (-120)
		if (Math.abs(obs.y - coinSpawnY) < 320) {
			var idx = availableLanes.indexOf(obs.lane);
			if (idx !== -1) availableLanes.splice(idx, 1);
		}
		// Prevent coin from spawning at the same Y as any obstacle (even in other lanes)
		if (Math.abs(obs.y - coinSpawnY) < 1) {
			// If any obstacle is at the same Y, skip coin spawn entirely
			return;
		}
	}
	if (availableLanes.length === 0) return; // No safe lane, skip coin spawn
	var lane = availableLanes[Math.floor(Math.random() * availableLanes.length)];
	var coin = new Coin();
	coin.lane = lane;
	coin.x = laneToX(lane);
	coin.y = coinSpawnY;
	coinObjects.push(coin);
	game.addChild(coin);
}
// --- COLLISION DETECTION ---
function checkCollision(a, b) {
	// Simple AABB
	var dx = Math.abs(a.x - b.x);
	var dy = Math.abs(a.y - b.y);
	var aw = a.width || 180,
		ah = a.height || 180;
	var bw = b.width || 180,
		bh = b.height || 180;
	return dx < aw / 2 + bw / 2 - 20 && dy < ah / 2 + bh / 2 - 20;
}
// --- GAME LOOP ---
game.update = function () {
	if (isGameOver || currentState !== GameState.PLAYING) return;
	// --- Runner jump update ---
	if (runner && typeof runner.update === "function") {
		runner.update();
	}
	// Scroll road background
	roadBg1.y += speed;
	roadBg2.y += speed;
	// Loop backgrounds
	if (roadBg1.y >= 2732) {
		roadBg1.y = roadBg2.y - 2732;
	}
	if (roadBg2.y >= 2732) {
		roadBg2.y = roadBg1.y - 2732;
	}
	// Increase speed
	speed += speedIncrease;
	// Handle coin combo timer
	if (coinCombo > 0) {
		coinComboTimer--;
		if (coinComboTimer <= 0) {
			// Reset combo when timer expires
			coinCombo = 0;
			if (coinComboText) {
				coinComboText.destroy();
				coinComboText = null;
			}
		}
	}
	// Move obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.y += speed;
		if (obs.y > 2732 + 200) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with runner
		if (checkCollision(obs, runner) && !runner.isJumping) {
			triggerGameOver();
			return;
		}
	}
	// Move coins
	for (var j = coinObjects.length - 1; j >= 0; j--) {
		var coin = coinObjects[j];
		coin.y += speed;
		if (coin.y > 2732 + 120) {
			coin.destroy();
			coinObjects.splice(j, 1);
			continue;
		}
		// Collision with runner
		if (checkCollision(coin, runner)) {
			// Increase combo counter
			coinCombo++;
			coinComboTimer = coinComboTimeout;
			// Calculate bonus based on combo
			var bonus = Math.min(coinCombo, 5); // Cap bonus at 5x
			var coinValue = 10 * bonus;
			// Collect coin
			coins += 1;
			score += coinValue;
			LK.setScore(score);
			scoreTxt.setText(score);
			coinsTxt.setText(coins);
			// Show combo text
			if (coinComboText) {
				coinComboText.destroy();
			}
			if (coinCombo > 1) {
				coinComboText = new Text2('x' + coinCombo + ' COMBO!', {
					size: 80,
					fill: 0xFFCC00
				});
				coinComboText.anchor.set(0.5, 0.5);
				coinComboText.x = coin.x;
				coinComboText.y = coin.y - 100;
				game.addChild(coinComboText);
				// Animate combo text
				tween(coinComboText, {
					y: coinComboText.y - 100,
					alpha: 0
				}, {
					duration: 1000,
					easing: tween.cubicOut,
					onFinish: function onFinish() {
						if (coinComboText) {
							coinComboText.destroy();
							coinComboText = null;
						}
					}
				});
			}
			// Add sparkle effect
			LK.effects.flashObject(coin, 0xffff00, 200);
			// Play coin sound
			LK.getSound('coin_collect').play();
			// Play a bounce animation on the coin counter
			tween(coinIcon, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 150,
				easing: tween.bounceOut,
				onFinish: function onFinish() {
					tween(coinIcon, {
						scaleX: 0.8,
						scaleY: 0.8
					}, {
						duration: 150,
						easing: tween.easeOut
					});
				}
			});
			coin.destroy();
			coinObjects.splice(j, 1);
			continue;
		}
	}
	// Spawn obstacles
	spawnTimer -= speed;
	if (spawnTimer <= 0) {
		spawnObstacle();
		// Next spawn in 700-1100 px
		spawnTimer = minObstacleGap + Math.floor(Math.random() * 400);
	}
	// Spawn coins
	coinSpawnTimer -= speed;
	if (coinSpawnTimer <= 0) {
		spawnCoin();
		// Next coin in 400-900 px
		coinSpawnTimer = 400 + Math.floor(Math.random() * 500);
	}
};
// --- CUSTOM GAME OVER SCREEN ---
var gameOverScreen = new Container();
gameOverScreen.visible = false;
// Dimmed background
var gameOverBg = LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 1.2,
	scaleY: 1.2
});
gameOverBg.x = 2048 / 2;
gameOverBg.y = 2732 / 2;
gameOverBg.alpha = 0.7;
gameOverBg.tint = 0x222222;
gameOverScreen.addChild(gameOverBg);
// "Game Over" text
var gameOverText = new Text2('GAME OVER', {
	size: 180,
	fill: 0xFF4444
});
gameOverText.anchor.set(0.5, 0.5);
gameOverText.x = 2048 / 2;
gameOverText.y = 800;
gameOverScreen.addChild(gameOverText);
// Score label
var finalScoreText = new Text2('SCORE: 0', {
	size: 120,
	fill: 0xffffff
});
finalScoreText.anchor.set(0.5, 0.5);
finalScoreText.x = 2048 / 2;
finalScoreText.y = 1100;
gameOverScreen.addChild(finalScoreText);
// Coins label
var finalCoinsText = new Text2('COINS: 0', {
	size: 100,
	fill: 0xFFCC00
});
finalCoinsText.anchor.set(0.5, 0.5);
finalCoinsText.x = 2048 / 2;
finalCoinsText.y = 1250;
gameOverScreen.addChild(finalCoinsText);
// Restart button
var restartBtn = new Container();
var restartBtnText = new Text2('RESTART', {
	size: 140,
	fill: 0xffffff
});
restartBtnText.anchor.set(0.5, 0.5);
restartBtn.addChild(restartBtnText);
restartBtn.x = 2048 / 2;
restartBtn.y = 1500;
restartBtn.interactive = true;
gameOverScreen.addChild(restartBtn);
game.addChild(gameOverScreen);
// Animate in the game over screen
function showGameOverScreen() {
	finalScoreText.setText('SCORE: ' + score);
	finalCoinsText.setText('COINS: ' + coins);
	gameOverScreen.visible = true;
	gameOverScreen.alpha = 0;
	// Hide gameplay elements
	runner.visible = false;
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].visible = false;
	}
	for (var j = 0; j < coinObjects.length; j++) {
		coinObjects[j].visible = false;
	}
	roadBg1.visible = false;
	roadBg2.visible = false;
	scoreTxt.visible = false;
	coinCounter.visible = false;
	tween(gameOverScreen, {
		alpha: 1
	}, {
		duration: 400,
		easing: tween.cubicOut
	});
}
// Hide the game over screen
function hideGameOverScreen() {
	gameOverScreen.visible = false;
	// Restore gameplay elements
	runner.visible = true;
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].visible = true;
	}
	for (var j = 0; j < coinObjects.length; j++) {
		coinObjects[j].visible = true;
	}
	roadBg1.visible = true;
	roadBg2.visible = true;
}
// Restart button handlers
restartBtn.down = function () {
	tween(restartBtn, {
		scaleX: 0.95,
		scaleY: 0.95
	}, {
		duration: 100
	});
};
restartBtn.up = function () {
	tween(restartBtn, {
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 100,
		onFinish: function onFinish() {
			hideGameOverScreen();
			currentState = GameState.PLAYING;
			gameUI.hide();
			resetGame();
			scoreTxt.visible = true;
			showCoinCounterAnimated();
		}
	});
};
// --- RESET ON GAME OVER ---
game.on('destroy', function () {
	// Clean up arrays
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].destroy();
	}
	for (var j = 0; j < coinObjects.length; j++) {
		coinObjects[j].destroy();
	}
	obstacles = [];
	coinObjects = [];
	isGameOver = false;
	speed = 18;
	score = 0;
	coins = 0;
	coinCombo = 0;
	coinComboTimer = 0;
	if (coinComboText) {
		coinComboText.destroy();
		coinComboText = null;
	}
	LK.setScore(0);
	scoreTxt.setText('0');
	coinsTxt.setText('0');
	runner.x = laneToX(1);
	runner.lane = 1;
	runner.y = 2732 - 400;
	spawnTimer = 0;
	coinSpawnTimer = 0;
	roadBg1.y = 0;
	roadBg2.y = -2732;
	// Return to menu
	currentState = GameState.MENU;
	gameUI.showMenu();
	// Hide game UI
	scoreTxt.visible = false;
	coinCounter.visible = false;
	hideGameOverScreen();
});
// Show custom game over screen instead of default
function triggerGameOver() {
	isGameOver = true;
	LK.effects.flashScreen(0xff0000, 800);
	showGameOverScreen();
}