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

/**** 
* Classes
****/ 
// Bird class (player)
var Bird = Container.expand(function () {
	var self = Container.call(this);
	// Attach bird asset (ellipse, yellow)
	var birdAsset = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Bird is now half the size of yacht: 240x240
	birdAsset.width = 240;
	birdAsset.height = 240;
	birdAsset.color = 0xffe066;
	birdAsset.shape = 'ellipse';
	// No update needed; movement is handled in game.move
	return self;
});
// Coin class
var Coin = Container.expand(function () {
	var self = Container.call(this);
	// Attach coin asset (ellipse, gold)
	var coinAsset = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For MVP, coin is 120x120 ellipse, gold (increased size)
	coinAsset.width = 120;
	coinAsset.height = 120;
	coinAsset.color = 0xffd700;
	coinAsset.shape = 'ellipse';
	// Coin speed (matches background speed)
	self.speed = 12;
	// Update: move left, destroy if off screen
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});
// Sea background class (scrolling effect)
var Sea = Container.expand(function () {
	var self = Container.call(this);
	// Attach sea asset (box, blue)
	var seaAsset = self.attachAsset('sea', {
		anchorX: 0,
		anchorY: 0
	});
	// Sea covers full width, lower 60% of screen
	seaAsset.width = 2048;
	seaAsset.height = 1640; // 60% of 2732
	seaAsset.color = 0x3ca0e8;
	seaAsset.shape = 'box';
	// For scrolling, we use two sea objects, so no update needed here
	return self;
});
// Yacht (obstacle) class
var Yacht = Container.expand(function () {
	var self = Container.call(this);
	// Attach yacht asset (box, white)
	var yachtAsset = self.attachAsset('yacht', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For MVP, yacht is slightly smaller (400x400), white
	yachtAsset.width = 400;
	yachtAsset.height = 400;
	yachtAsset.color = 0xffffff;
	yachtAsset.shape = 'box';
	// Yacht speed (matches background speed)
	self.speed = 12;
	// Update: move left, destroy if off screen
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// --- Global variables ---
// Tween plugin for simple animations (not used in MVP, but included for future use)
var bird;
var coins = [];
var yachts = [];
var dragNode = null;
var score = 0;
var gameStarted = false;
var lastCoinSpawn = 0;
var lastYachtSpawn = 0;
var coinSpawnInterval = 0.7; // seconds
var yachtSpawnInterval = 1.2; // seconds
var sea1, sea2;
var scoreTxt;
// --- Sea background (scrolling) ---
sea1 = new Sea();
sea2 = new Sea();
game.addChild(sea1);
game.addChild(sea2);
// Position sea1 at bottom, sea2 right after it (to the right)
sea1.x = 0;
sea1.y = 2732 - sea1.height;
sea2.x = 2048;
sea2.y = sea1.y;
// --- Bird (player) ---
bird = new Bird();
game.addChild(bird);
// Start position: left quarter, vertically centered above sea
bird.x = 350;
bird.y = 2732 / 2;
// --- GUI: Score ---
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFF700
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// (Timer GUI removed)
// --- Helper: Clamp bird within play area ---
function clampBirdY(y) {
	// Bird must stay above sea, and not go off top
	var minY = 0 + bird.height / 2 + 20;
	var maxY = 2732 - sea1.height - bird.height / 2 - 20 + sea1.height;
	if (y < minY) return minY;
	if (y > maxY) return maxY;
	return y;
}
// --- Touch/drag controls ---
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp Y to play area
		dragNode.y = clampBirdY(y);
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only allow drag if touch is on bird or near bird
	var dx = x - bird.x;
	var dy = y - bird.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist < bird.width) {
		dragNode = bird;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// --- Main game update loop ---
game.update = function () {
	// --- Start timer on first move ---
	if (!gameStarted && LK.ticks > 0) {
		gameStarted = true;
	}
	// --- Scroll sea background ---
	var seaSpeed = 12;
	sea1.x -= seaSpeed;
	sea2.x -= seaSpeed;
	// If a sea is fully off screen, move it to the right
	if (sea1.x <= -2048) sea1.x = sea2.x + 2048;
	if (sea2.x <= -2048) sea2.x = sea1.x + 2048;
	// --- Spawn coins ---
	if (gameStarted) {
		if (LK.ticks - lastCoinSpawn > coinSpawnInterval * 60) {
			var coin = new Coin();
			// Spawn at right edge, random Y above sea
			coin.x = 2048 + coin.width;
			var minY = 0 + coin.height / 2 + 100;
			var maxY = 2732 - sea1.height - coin.height / 2 - 100 + sea1.height;
			coin.y = minY + Math.random() * (maxY - minY);
			coins.push(coin);
			game.addChild(coin);
			lastCoinSpawn = LK.ticks;
		}
	}
	// --- Spawn yachts (obstacles) ---
	if (gameStarted) {
		if (LK.ticks - lastYachtSpawn > yachtSpawnInterval * 60) {
			var yacht = new Yacht();
			// Spawn at right edge, random Y on sea
			yacht.x = 2048 + yacht.width;
			var minY = 2732 - sea1.height + yacht.height / 2 + 40;
			var maxY = 2732 - yacht.height / 2 - 40;
			yacht.y = minY + Math.random() * (maxY - minY);
			yachts.push(yacht);
			game.addChild(yacht);
			lastYachtSpawn = LK.ticks;
		}
	}
	// --- Update coins ---
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		coin.update();
		// Off screen
		if (coin.x < -coin.width) {
			coin.destroy();
			coins.splice(i, 1);
			continue;
		}
		// Collision with bird
		if (coin.intersects(bird)) {
			score += 1;
			scoreTxt.setText(score);
			// --- Bird grows slightly with each coin, but not too much ---
			if (typeof bird.growScale === "undefined") bird.growScale = 1;
			if (bird.growScale < 1.7) {
				// Limit max growth (1.7x original)
				bird.growScale += 0.07;
				bird.scaleX = bird.growScale;
				bird.scaleY = bird.growScale;
			}
			coin.destroy();
			coins.splice(i, 1);
			continue;
		}
	}
	// --- Update yachts ---
	for (var j = yachts.length - 1; j >= 0; j--) {
		var yacht = yachts[j];
		yacht.update();
		// Off screen
		if (yacht.x < -yacht.width) {
			yacht.destroy();
			yachts.splice(j, 1);
			continue;
		}
		// Collision with bird (game over) - use yacht itself
		if (yacht.intersects(bird)) {
			LK.effects.flashScreen(0xff0000, 800);
			LK.showGameOver();
			return;
		}
	}
	// (Timer update and win condition removed)
};
// --- Initial score and timer display ---
scoreTxt.setText('0');