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

/**** 
* Classes
****/ 
// Bonus class: falls from top, destroys itself when off screen
var Bonus = Container.expand(function () {
	var self = Container.call(this);
	var gfx = self.attachAsset('bonus', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10; // Will be increased as game progresses
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Obstacle class: falls from top, destroys itself when off screen
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var gfx = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 12; // Will be increased as game progresses
	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 gfx = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// No update needed; position is set by facekit in main game loop
	return self;
});

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

/**** 
* Game Code
****/ 
// Player: blue ellipse
// Bonus: yellow ellipse
// Obstacles: gray boxes
// Game variables
var player = new Player();
game.addChild(player);
player.x = 2048 / 2;
player.y = 2732 - 350; // Start near bottom
var obstacles = [];
var bonuses = [];
var score = 0;
var bonusScore = 0;
var gameOver = false;
var ticksSurvived = 0;
// Score text
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Bonus text
var bonusTxt = new Text2('', {
	size: 80,
	fill: 0xFFE066
});
bonusTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(bonusTxt);
bonusTxt.y = 130;
// Difficulty progression
var obstacleInterval = 60; // ticks between obstacles (start: 1/sec)
var bonusInterval = 180; // ticks between bonuses (start: 1/3sec)
var minObstacleInterval = 18; // fastest: ~3/sec
var minBonusInterval = 240; // slowest: ~1/4sec
var lastObstacleTick = 0;
var lastBonusTick = 0;
var obstacleSpeed = 12;
var bonusSpeed = 10;
var speedIncreaseEvery = 600; // every 10 seconds
// Main update loop
game.update = function () {
	if (gameOver) return;
	// Update player position from facekit
	// Clamp to game area
	var fx = facekit.mouthCenter && facekit.mouthCenter.x ? facekit.mouthCenter.x : 2048 / 2;
	var fy = facekit.mouthCenter && facekit.mouthCenter.y ? facekit.mouthCenter.y : 2732 - 350;
	// Keep player inside bounds
	var px = Math.max(player.width / 2, Math.min(2048 - player.width / 2, fx));
	var py = Math.max(player.height / 2 + 100, Math.min(2732 - player.height / 2, fy));
	player.x = px;
	player.y = py;
	// Spawn obstacles
	if (LK.ticks - lastObstacleTick >= obstacleInterval) {
		var obs = new Obstacle();
		obs.x = Math.random() * (2048 - 200) + 100;
		obs.y = -obs.height / 2;
		obs.speed = obstacleSpeed;
		obstacles.push(obs);
		game.addChild(obs);
		lastObstacleTick = LK.ticks;
	}
	// Spawn bonuses
	if (LK.ticks - lastBonusTick >= bonusInterval) {
		// 60% chance to spawn a bonus
		if (Math.random() < 0.6) {
			var bon = new Bonus();
			bon.x = Math.random() * (2048 - 160) + 80;
			bon.y = -bon.height / 2;
			bon.speed = bonusSpeed;
			bonuses.push(bon);
			game.addChild(bon);
		}
		lastBonusTick = LK.ticks;
	}
	// Increase difficulty over time
	if (LK.ticks % speedIncreaseEvery === 0 && LK.ticks > 0) {
		if (obstacleInterval > minObstacleInterval) obstacleInterval -= 4;
		if (bonusInterval < minBonusInterval) bonusInterval += 8;
		obstacleSpeed += 1.5;
		bonusSpeed += 1;
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Remove if off screen
		if (obs.y - obs.height / 2 > 2732 + 50) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with player
		if (obs.intersects(player)) {
			// Game over
			LK.effects.flashScreen(0xff0000, 800);
			gameOver = true;
			tween(player, {
				alpha: 0.2
			}, {
				duration: 400,
				easing: tween.easeOut
			});
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 900);
			return;
		}
	}
	// Update bonuses
	for (var j = bonuses.length - 1; j >= 0; j--) {
		var bon = bonuses[j];
		bon.update();
		// Remove if off screen
		if (bon.y - bon.height / 2 > 2732 + 50) {
			bon.destroy();
			bonuses.splice(j, 1);
			continue;
		}
		// Collision with player
		if (bon.intersects(player)) {
			bonusScore += 1;
			score += 5;
			scoreTxt.setText(score);
			bonusTxt.setText('Bonuses: ' + bonusScore);
			// Flash bonus
			LK.effects.flashObject(bon, 0xffff00, 300);
			bon.destroy();
			bonuses.splice(j, 1);
			continue;
		}
	}
	// Score: 1 point per 30 ticks survived
	ticksSurvived++;
	if (ticksSurvived % 30 === 0) {
		score += 1;
		scoreTxt.setText(score);
	}
};
// Reset game state on restart
game.on('reset', function () {
	// Remove all obstacles and bonuses
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].destroy();
	}
	for (var j = 0; j < bonuses.length; j++) {
		bonuses[j].destroy();
	}
	obstacles = [];
	bonuses = [];
	score = 0;
	bonusScore = 0;
	ticksSurvived = 0;
	gameOver = false;
	player.x = 2048 / 2;
	player.y = 2732 - 350;
	scoreTxt.setText('0');
	bonusTxt.setText('');
	obstacleInterval = 60;
	bonusInterval = 180;
	obstacleSpeed = 12;
	bonusSpeed = 10;
	lastObstacleTick = 0;
	lastBonusTick = 0;
});
// Show camera background
game.setBackgroundColor(0x000000); // Camera will show behind game elements
// No need to handle music, pause, or leaderboard