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

/**** 
* Classes
****/ 
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obsSprite = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.width = obsSprite.width;
	self.height = obsSprite.height;
	// Update method
	self.update = function () {
		self.x -= gameSpeed;
	};
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerSprite = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.width = playerSprite.width;
	self.height = playerSprite.height;
	// Physics
	self.vy = 0;
	self.isOnGround = false;
	// Jump method
	self.jump = function () {
		if (self.isOnGround) {
			self.vy = -48; // Jump velocity
			self.isOnGround = false;
		}
	};
	// Update method
	self.update = function () {
		// Gravity
		self.vy += 4; // Gravity acceleration
		self.y += self.vy;
		// Prevent falling below ground
		if (self.y > groundY) {
			self.y = groundY;
			self.vy = 0;
			self.isOnGround = true;
		}
	};
	return self;
});
// Point token class
var PointToken = Container.expand(function () {
	var self = Container.call(this);
	var pointSprite = self.attachAsset('point', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = pointSprite.width;
	self.height = pointSprite.height;
	// Update method
	self.update = function () {
		self.x -= gameSpeed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb // Sky blue
});

/**** 
* Game Code
****/ 
// Point token: yellow ellipse
// Obstacle: dark gray box
// Ground: green box
// Player character: red box
// Constants
var groundHeight = 120;
var groundY = 2732 - groundHeight;
var playerStartX = 400;
var playerStartY = groundY;
var gameSpeed = 24; // pixels per frame
var obstacleMinGap = 600;
var obstacleMaxGap = 1100;
var obstacleMinY = groundY - 160;
var obstacleMaxY = groundY;
var pointMinGap = 400;
var pointMaxGap = 900;
// Game state
var player;
var ground;
var obstacles = [];
var points = [];
var score = 0;
var scoreTxt;
var nextObstacleX = 1200;
var nextPointX = 900;
var isGameOver = false;
// Add ground
ground = LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0
});
ground.x = 0;
ground.y = groundY;
game.addChild(ground);
// Add player
player = new Player();
player.x = playerStartX;
player.y = playerStartY;
game.addChild(player);
// Score text
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Helper: spawn obstacle
function spawnObstacle(x) {
	var obs = new Obstacle();
	obs.x = x;
	obs.y = groundY;
	obstacles.push(obs);
	game.addChild(obs);
}
// Helper: spawn point token
function spawnPoint(x) {
	var pt = new PointToken();
	pt.x = x;
	pt.y = groundY - 200 - Math.floor(Math.random() * 200); // Random height above ground
	points.push(pt);
	game.addChild(pt);
}
// Initial obstacles and points
spawnObstacle(1200);
spawnPoint(900);
// Touch/tap to jump
game.down = function (x, y, obj) {
	if (!isGameOver) {
		player.jump();
	}
};
// Main update loop
game.update = function () {
	if (isGameOver) return;
	// Update player
	player.update();
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Remove if off screen
		if (obs.x < -obs.width) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision with player
		if (player.intersects(obs)) {
			// Flash screen red and show game over
			LK.effects.flashScreen(0xff0000, 800);
			isGameOver = true;
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 800);
			return;
		}
	}
	// Update points
	for (var j = points.length - 1; j >= 0; j--) {
		var pt = points[j];
		pt.update();
		// Remove if off screen
		if (pt.x < -pt.width) {
			pt.destroy();
			points.splice(j, 1);
			continue;
		}
		// Collect point
		if (player.intersects(pt)) {
			score += 1;
			LK.setScore(score);
			scoreTxt.setText(score);
			// Animate point collection
			tween(pt, {
				scaleX: 1.8,
				scaleY: 1.8,
				alpha: 0
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					pt.destroy();
				}
			});
			points.splice(j, 1);
			continue;
		}
	}
	// Spawn new obstacles
	if (obstacles.length === 0 || obstacles[obstacles.length - 1].x < 2048 - obstacleMinGap) {
		var gap = obstacleMinGap + Math.floor(Math.random() * (obstacleMaxGap - obstacleMinGap));
		var newX = (obstacles.length > 0 ? obstacles[obstacles.length - 1].x : 1200) + gap;
		spawnObstacle(newX);
	}
	// Spawn new points
	if (points.length === 0 || points[points.length - 1].x < 2048 - pointMinGap) {
		var gapP = pointMinGap + Math.floor(Math.random() * (pointMaxGap - pointMinGap));
		var newXP = (points.length > 0 ? points[points.length - 1].x : 900) + gapP;
		spawnPoint(newXP);
	}
};
// Reset score on game start
LK.setScore(0);
score = 0;
scoreTxt.setText(score);