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

/**** 
* Classes
****/ 
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heartGraphics = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.driftX = 3;
	self.driftY = 2;
	self.baseSize = 1;
	self.lettersCollected = 0;
	self.update = function () {
		self.x += self.driftX;
		self.y += self.driftY;
		// Wrap around screen edges
		if (self.x < 0) self.x = 2048;
		if (self.x > 2048) self.x = 0;
		if (self.y < 0) self.y = 2732;
		if (self.y > 2732) self.y = 0;
	};
	self.changeDriftDirection = function () {
		self.driftX = -self.driftX;
		self.driftY = -self.driftY;
	};
	self.collectLetter = function () {
		self.lettersCollected++;
		var newScale = self.baseSize + self.lettersCollected * 0.1;
		tween(heartGraphics, {
			scaleX: newScale,
			scaleY: newScale
		}, {
			duration: 300,
			easing: tween.easeOut
		});
		// Change color based on letters collected
		var colors = [0xff69b4, 0xff1493, 0xdc143c, 0xb22222];
		var colorIndex = Math.min(Math.floor(self.lettersCollected / 3), colors.length - 1);
		tween(heartGraphics, {
			tint: colors[colorIndex]
		}, {
			duration: 500
		});
	};
	return self;
});
var LoveLetter = Container.expand(function () {
	var self = Container.call(this);
	var letterGraphics = self.attachAsset('loveLetter', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.update = function () {
		letterGraphics.rotation += 0.05;
		// Gentle floating animation
		letterGraphics.y += Math.sin(LK.ticks * 0.1 + self.x * 0.01) * 0.5;
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000022
});

/**** 
* Game Code
****/ 
var heart = game.addChild(new Heart());
heart.x = 1024;
heart.y = 1366;
var loveLetters = [];
var obstacles = [];
var targetLetters = 10;
var currentLevel = 1;
// UI Elements
var scoreTxt = new Text2('Letters: 0/' + targetLetters, {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var levelTxt = new Text2('Level ' + currentLevel, {
	size: 60,
	fill: 0xFFB6C1
});
levelTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(levelTxt);
levelTxt.x -= 50;
levelTxt.y += 50;
// Generate initial love letters
function spawnLoveLetters() {
	for (var i = 0; i < targetLetters; i++) {
		var letter = new LoveLetter();
		letter.x = Math.random() * 1800 + 124;
		letter.y = Math.random() * 2400 + 166;
		loveLetters.push(letter);
		game.addChild(letter);
	}
}
// Generate obstacles
function spawnObstacles() {
	var obstacleCount = currentLevel + 2;
	for (var i = 0; i < obstacleCount; i++) {
		var obstacle = new Obstacle();
		obstacle.x = Math.random() * 1800 + 124;
		obstacle.y = Math.random() * 2400 + 166;
		// Make sure obstacles don't spawn too close to heart or letters
		var tooClose = true;
		var attempts = 0;
		while (tooClose && attempts < 20) {
			tooClose = false;
			// Check distance from heart
			var heartDist = Math.sqrt(Math.pow(obstacle.x - heart.x, 2) + Math.pow(obstacle.y - heart.y, 2));
			if (heartDist < 200) tooClose = true;
			// Check distance from letters
			for (var j = 0; j < loveLetters.length; j++) {
				var letterDist = Math.sqrt(Math.pow(obstacle.x - loveLetters[j].x, 2) + Math.pow(obstacle.y - loveLetters[j].y, 2));
				if (letterDist < 150) tooClose = true;
			}
			if (tooClose) {
				obstacle.x = Math.random() * 1800 + 124;
				obstacle.y = Math.random() * 2400 + 166;
			}
			attempts++;
		}
		obstacles.push(obstacle);
		game.addChild(obstacle);
	}
}
function nextLevel() {
	currentLevel++;
	targetLetters += 3;
	// Clear existing letters and obstacles
	for (var i = loveLetters.length - 1; i >= 0; i--) {
		loveLetters[i].destroy();
	}
	loveLetters = [];
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].destroy();
	}
	obstacles = [];
	// Reset heart position
	heart.x = 1024;
	heart.y = 1366;
	heart.lettersCollected = 0;
	// Update UI
	scoreTxt.setText('Letters: 0/' + targetLetters);
	levelTxt.setText('Level ' + currentLevel);
	// Spawn new elements
	spawnLoveLetters();
	spawnObstacles();
	// Flash screen to indicate level change
	LK.effects.flashScreen(0x9370db, 800);
}
// Initialize first level
spawnLoveLetters();
spawnObstacles();
// Game input handling
game.down = function (x, y, obj) {
	heart.changeDriftDirection();
};
// Main game loop
game.update = function () {
	// Check collision with love letters
	for (var i = loveLetters.length - 1; i >= 0; i--) {
		var letter = loveLetters[i];
		if (!letter.collected && heart.intersects(letter)) {
			letter.collected = true;
			heart.collectLetter();
			LK.setScore(LK.getScore() + 10);
			LK.getSound('collect').play();
			// Remove letter with animation
			tween(letter, {
				alpha: 0,
				scaleX: 2,
				scaleY: 2
			}, {
				duration: 300,
				onFinish: function onFinish() {
					letter.destroy();
				}
			});
			loveLetters.splice(i, 1);
			// Update score display
			scoreTxt.setText('Letters: ' + heart.lettersCollected + '/' + targetLetters);
			// Check if level complete
			if (heart.lettersCollected >= targetLetters) {
				LK.setTimeout(function () {
					nextLevel();
				}, 500);
			}
		}
	}
	// Check collision with obstacles
	for (var i = 0; i < obstacles.length; i++) {
		var obstacle = obstacles[i];
		if (heart.intersects(obstacle)) {
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
	// Victory condition
	if (currentLevel > 5) {
		LK.showYouWin();
	}
};