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

/**** 
* Classes
****/ 
// Obstacle class: moves downward, destroys itself off-screen
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsGfx = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12 + Math.random() * 6; // pixels per frame, slower base speed
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Player class: follows face position
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGfx = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For possible future effects
	self.flash = function () {
		tween(self, {
			alpha: 0.3
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 1
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Powerup class: moves downward, destroys itself off-screen
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var powGfx = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 14 + Math.random() * 6;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181c2c
});

/**** 
* Game Code
****/ 
// Powerup: Green ellipse
// Obstacle: Red box
// Character: Player avatar (ellipse, bright color)
// Game area margins (to avoid top-left menu)
var marginTop = 100;
var marginLeft = 100;
var marginRight = 100;
var marginBottom = 100;
// Player setup
var player = new Player();
game.addChild(player);
// Start in center
player.x = 2048 / 2;
player.y = 2732 - 400;
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Powerup timer display (hidden by default)
var powerupTxt = new Text2('', {
	size: 80,
	fill: 0xFFE066
});
powerupTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(powerupTxt);
powerupTxt.visible = false;
// Game state
var obstacles = [];
var powerups = [];
var powerupActive = false;
var powerupTimer = 0;
var powerupDuration = 180; // frames (3 seconds)
var score = 0;
var ticks = 0;
var gameOver = false;
// --- Speed scaling and rare obstacle pass-through ---
var speedScale = 1.0; // Start slow, increases with powerups
var rarePassThroughActive = false;
var rarePassThroughTimer = 0;
var rarePassThroughDuration = 120; // frames (2 seconds)
// Helper: clamp value
function clamp(val, min, max) {
	return Math.max(min, Math.min(max, val));
}
// Main update loop
game.update = function () {
	if (gameOver) return;
	ticks++;
	// --- Face tracking: update player position ---
	// Use mouth center if available, else fallback to noseTip
	var faceX = facekit.mouthCenter && facekit.mouthCenter.x ? facekit.mouthCenter.x : facekit.noseTip && facekit.noseTip.x ? facekit.noseTip.x : 2048 / 2;
	var faceY = facekit.mouthCenter && facekit.mouthCenter.y ? facekit.mouthCenter.y : facekit.noseTip && facekit.noseTip.y ? facekit.noseTip.y : 2732 - 400;
	// Clamp to game area (avoid top-left menu and screen edges)
	var px = clamp(faceX, marginLeft + player.width / 2, 2048 - marginRight - player.width / 2);
	var py = clamp(faceY, marginTop + player.height / 2, 2732 - marginBottom - player.height / 2);
	// Smooth movement (lerp)
	player.x += (px - player.x) * 0.35;
	player.y += (py - player.y) * 0.35;
	// --- Spawn obstacles ---
	// Increase spawn rate over time
	var spawnInterval = Math.max(32, 80 - Math.floor(ticks / 600));
	if (ticks % spawnInterval === 0) {
		var obs = new Obstacle();
		// Random X, avoid edges
		obs.x = clamp(180 + Math.random() * (2048 - 360), marginLeft + 90, 2048 - marginRight - 90);
		obs.y = -80;
		// Speed up as score increases and with powerups
		obs.speed = (12 + Math.random() * 6 + Math.floor(score / 10) * 1.2) * speedScale;
		// 10% chance: rare pass-through obstacle (if not already active)
		if (!rarePassThroughActive && Math.random() < 0.10) {
			obs.isPassThrough = true;
			obs.alpha = 0.45; // visually faded
			obs.tint = 0x8e44ad; // purple tint for rare
		} else {
			obs.isPassThrough = false;
		}
		obstacles.push(obs);
		game.addChild(obs);
	}
	// --- Spawn powerups ---
	if (!powerupActive && ticks > 120 && ticks % 420 === 0) {
		var pow = new Powerup();
		pow.x = clamp(180 + Math.random() * (2048 - 360), marginLeft + 90, 2048 - marginRight - 90);
		pow.y = -60;
		pow.speed = (14 + Math.random() * 6) * speedScale;
		powerups.push(pow);
		game.addChild(pow);
	}
	// --- Update obstacles ---
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Off-screen
		if (obs.y - obs.height / 2 > 2732 + 40) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with player
		if (!powerupActive && player.intersects(obs)) {
			// If rare obstacle and pass-through is active, skip collision
			if (obs.isPassThrough && rarePassThroughActive) {
				// No effect, pass through
			} else {
				player.flash();
				LK.effects.flashScreen(0xff0000, 600);
				gameOver = true;
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 600);
				return;
			}
		}
	}
	// --- Update powerups ---
	for (var j = powerups.length - 1; j >= 0; j--) {
		var pow = powerups[j];
		pow.update();
		// Off-screen
		if (pow.y - pow.height / 2 > 2732 + 40) {
			pow.destroy();
			powerups.splice(j, 1);
			continue;
		}
		// Collect
		if (player.intersects(pow)) {
			pow.destroy();
			powerups.splice(j, 1);
			powerupActive = true;
			powerupTimer = powerupDuration;
			powerupTxt.visible = true;
			// --- Speed up game a little every powerup ---
			speedScale = Math.min(speedScale + 0.08, 2.5); // Cap max speed
			// --- 25% chance: activate rare pass-through mode for a short time ---
			if (!rarePassThroughActive && Math.random() < 0.25) {
				rarePassThroughActive = true;
				rarePassThroughTimer = rarePassThroughDuration;
				powerupTxt.setText("Pass Through!");
				powerupTxt.visible = true;
				// Visual feedback: player turns purple
				tween(player, {
					tint: 0x8e44ad
				}, {
					duration: 120
				});
			}
			// Visual feedback
			tween(player, {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 200,
				onFinish: function onFinish() {
					tween(player, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 200
					});
				}
			});
		}
	}
	// --- Powerup effect ---
	if (powerupActive) {
		powerupTimer--;
		if (rarePassThroughActive) {
			powerupTxt.setText("Pass Through: " + Math.ceil(rarePassThroughTimer / 60) + "s");
		} else {
			powerupTxt.setText("Invincible: " + Math.ceil(powerupTimer / 60) + "s");
		}
		if (powerupTimer <= 0) {
			powerupActive = false;
			if (!rarePassThroughActive) powerupTxt.visible = false;
		}
	}
	// --- Rare pass-through effect ---
	if (rarePassThroughActive) {
		rarePassThroughTimer--;
		if (rarePassThroughTimer <= 0) {
			rarePassThroughActive = false;
			powerupTxt.visible = false;
			// Restore player color
			tween(player, {
				tint: 0x3fa9f5
			}, {
				duration: 120
			});
		}
	}
	// --- Score ---
	if (ticks % 6 === 0 && !gameOver) {
		score++;
		LK.setScore(score);
		scoreTxt.setText(score);
	}
};
// Reset state on game restart
game.on('reset', function () {
	// Remove all obstacles and powerups
	for (var i = 0; i < obstacles.length; i++) obstacles[i].destroy();
	for (var j = 0; j < powerups.length; j++) powerups[j].destroy();
	obstacles = [];
	powerups = [];
	score = 0;
	LK.setScore(0);
	scoreTxt.setText('0');
	powerupActive = false;
	powerupTimer = 0;
	powerupTxt.visible = false;
	player.x = 2048 / 2;
	player.y = 2732 - 400;
	gameOver = false;
	ticks = 0;
	speedScale = 1.0;
	rarePassThroughActive = false;
	rarePassThroughTimer = 0;
});
// No touch controls: face only, but allow drag fallback for debug
var dragNode = null;
game.down = function (x, y, obj) {
	// For debug: allow dragging player if facekit not available
	if (!facekit.mouthCenter) dragNode = player;
};
game.move = function (x, y, obj) {
	if (dragNode) {
		player.x = clamp(x, marginLeft + player.width / 2, 2048 - marginRight - player.width / 2);
		player.y = clamp(y, marginTop + player.height / 2, 2732 - marginBottom - player.height / 2);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};