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

/**** 
* Classes
****/ 
// Player character controlled by face
var FaceChar = Container.expand(function () {
	var self = Container.call(this);
	var _char = self.attachAsset('faceChar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For hit feedback
	self.flash = function () {
		tween(self, {
			alpha: 0.3
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 1
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obs = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Speed is set on creation
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Point collectible class
var PointItem = Container.expand(function () {
	var self = Container.call(this);
	var pt = self.attachAsset('point', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181c24
});

/**** 
* Game Code
****/ 
/*
We use simple shapes for the character, obstacles, and points.
*/
// Game area: 2048x2732
// Center Y for spawn
var GAME_W = 2048;
var GAME_H = 2732;
// Main character
var faceChar = new FaceChar();
faceChar.x = GAME_W / 2;
faceChar.y = GAME_H - 400;
game.addChild(faceChar);
// Arrays for obstacles and points
var obstacles = [];
var points = [];
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Best score display (optional, not persistent)
var bestScore = 0;
// Game state
var isDead = false;
var lastScore = 0;
// Spawning timers
var obstacleTimer = 0;
var pointTimer = 0;
// For face smoothing
var lastFaceX = faceChar.x;
var lastFaceY = faceChar.y;
// Helper: clamp
function clamp(val, min, max) {
	return Math.max(min, Math.min(max, val));
}
// Main update loop
game.update = function () {
	if (isDead) return;
	// --- Face tracking movement ---
	// Use mouthCenter if available, else fallback to noseTip
	var fx = facekit.mouthCenter && facekit.mouthCenter.x ? facekit.mouthCenter.x : facekit.noseTip && facekit.noseTip.x ? facekit.noseTip.x : GAME_W / 2;
	var fy = facekit.mouthCenter && facekit.mouthCenter.y ? facekit.mouthCenter.y : facekit.noseTip && facekit.noseTip.y ? facekit.noseTip.y : GAME_H - 400;
	// Clamp to game area, keep character fully visible
	var charR = faceChar.width / 2;
	fx = clamp(fx, charR, GAME_W - charR);
	fy = clamp(fy, charR + 120, GAME_H - charR - 40);
	// Smooth movement (lerp)
	lastFaceX += (fx - lastFaceX) * 0.35;
	lastFaceY += (fy - lastFaceY) * 0.35;
	faceChar.x = lastFaceX;
	faceChar.y = lastFaceY;
	// --- Spawning obstacles ---
	obstacleTimer--;
	if (obstacleTimer <= 0) {
		var obs = new Obstacle();
		// Random X, avoid left 100px (menu)
		var minX = 120 + obs.width / 2;
		var maxX = GAME_W - obs.width / 2;
		obs.x = minX + Math.random() * (maxX - minX);
		obs.y = -obs.height / 2;
		// Speed increases with score
		obs.speed = 12 + LK.getScore() * 0.12;
		obstacles.push(obs);
		game.addChild(obs);
		// Next spawn: 36-60 ticks
		obstacleTimer = 36 + Math.floor(Math.random() * 24);
	}
	// --- Spawning points ---
	pointTimer--;
	if (pointTimer <= 0) {
		var pt = new PointItem();
		var minX = 120 + pt.width / 2;
		var maxX = GAME_W - pt.width / 2;
		pt.x = minX + Math.random() * (maxX - minX);
		pt.y = -pt.height / 2;
		pt.speed = 10 + LK.getScore() * 0.10;
		points.push(pt);
		game.addChild(pt);
		// Next spawn: 60-120 ticks
		pointTimer = 60 + Math.floor(Math.random() * 60);
	}
	// --- Update obstacles ---
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var o = obstacles[i];
		o.update();
		// Remove if off screen
		if (o.y - o.height / 2 > GAME_H + 40) {
			o.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with player
		if (o.intersects(faceChar)) {
			// Game over
			isDead = true;
			faceChar.flash();
			LK.effects.flashScreen(0xff0000, 800);
			LK.showGameOver();
			return;
		}
	}
	// --- Update points ---
	for (var j = points.length - 1; j >= 0; j--) {
		var p = points[j];
		p.update();
		// Remove if off screen
		if (p.y - p.height / 2 > GAME_H + 40) {
			p.destroy();
			points.splice(j, 1);
			continue;
		}
		// Collect
		if (p.intersects(faceChar)) {
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			// Play point collect sound
			LK.getSound('pointCollect').play();
			// Feedback
			tween(p, {
				scaleX: 1.5,
				scaleY: 1.5,
				alpha: 0
			}, {
				duration: 180,
				onFinish: function onFinish() {
					p.destroy();
				}
			});
			points.splice(j, 1);
			continue;
		}
	}
};
// Reset state on new game
game.on('reset', function () {
	// Remove all obstacles and points
	for (var i = 0; i < obstacles.length; i++) obstacles[i].destroy();
	for (var j = 0; j < points.length; j++) points[j].destroy();
	obstacles = [];
	points = [];
	isDead = false;
	LK.setScore(0);
	scoreTxt.setText('0');
	// Reset faceChar position
	faceChar.x = GAME_W / 2;
	faceChar.y = GAME_H - 400;
	lastFaceX = faceChar.x;
	lastFaceY = faceChar.y;
	obstacleTimer = 30;
	pointTimer = 60;
});
// Also reset on game over (for safety)
game.on('gameover', function () {
	isDead = true;
});
// Touch fallback: allow dragging character if facekit not available
var dragNode = null;
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp to game area
		var charR = faceChar.width / 2;
		var nx = clamp(x, charR, GAME_W - charR);
		var ny = clamp(y, charR + 120, GAME_H - charR - 40);
		faceChar.x = nx;
		faceChar.y = ny;
		lastFaceX = nx;
		lastFaceY = ny;
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only allow drag if facekit not available
	if (!facekit.mouthCenter || !facekit.mouthCenter.x) {
		dragNode = faceChar;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};