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

/**** 
* Classes
****/ 
var Snowball = Container.expand(function () {
	var self = Container.call(this);
	var snowballGraphics = self.attachAsset('snowball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 0;
	self.friction = 0.95;
	self.isMoving = false;
	self.update = function () {
		// Apply velocity
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Apply friction
		self.velocityX *= self.friction;
		self.velocityY *= self.friction;
		// Stop if moving very slowly
		if (Math.abs(self.velocityX) < 0.1 && Math.abs(self.velocityY) < 0.1) {
			self.velocityX = 0;
			self.velocityY = 0;
			self.isMoving = false;
		} else {
			self.isMoving = true;
		}
		// Rotate based on movement
		if (self.isMoving) {
			snowballGraphics.rotation += 0.1;
		}
		// Keep within bounds
		if (self.x < 100) self.x = 100;
		if (self.x > 1948) self.x = 1948;
		if (self.y < 100) self.y = 100;
	};
	self.addForce = function (forceX, forceY) {
		self.velocityX += forceX;
		self.velocityY += forceY;
	};
	return self;
});
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf0f8ff
});

/**** 
* Game Code
****/ 
// Game variables
var snowball;
var trees = [];
var fence;
var gameWon = false;
var lastTapTime = 0;
// Create ground
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
}));
// Create snowball
snowball = game.addChild(new Snowball());
snowball.x = 200;
snowball.y = 2400;
// Create trees in strategic positions
var treePositions = [{
	x: 400,
	y: 2100
}, {
	x: 800,
	y: 1900
}, {
	x: 1200,
	y: 2000
}, {
	x: 600,
	y: 1700
}, {
	x: 1000,
	y: 1500
}, {
	x: 1400,
	y: 1600
}, {
	x: 500,
	y: 1300
}, {
	x: 900,
	y: 1100
}, {
	x: 1300,
	y: 1200
}];
for (var i = 0; i < treePositions.length; i++) {
	var tree = game.addChild(new Tree());
	tree.x = treePositions[i].x;
	tree.y = treePositions[i].y;
	trees.push(tree);
}
// Create fence at the end
fence = game.addChild(LK.getAsset('fence', {
	anchorX: 0.5,
	anchorY: 1.0,
	x: 1024,
	y: 800
}));
// Score display
var instructionText = new Text2('Tap to roll the snowball to the fence!', {
	size: 60,
	fill: 0x2D5016
});
instructionText.anchor.set(0.5, 0);
LK.gui.top.addChild(instructionText);
instructionText.y = 150;
// Game controls
game.down = function (x, y, obj) {
	if (gameWon) return;
	var currentTime = Date.now();
	if (currentTime - lastTapTime < 200) return; // Prevent rapid tapping
	lastTapTime = currentTime;
	// Convert tap position to direction
	var tapX = x;
	var tapY = y;
	// Calculate direction from snowball to tap
	var dirX = tapX - snowball.x;
	var dirY = tapY - snowball.y;
	// Normalize direction
	var distance = Math.sqrt(dirX * dirX + dirY * dirY);
	if (distance > 0) {
		dirX /= distance;
		dirY /= distance;
	}
	// Apply force in that direction
	snowball.addForce(dirX * 8, dirY * 8);
	// Play roll sound
	LK.getSound('roll').play();
};
// Game update loop
game.update = function () {
	if (gameWon) return;
	// Check collision with trees
	for (var i = 0; i < trees.length; i++) {
		var tree = trees[i];
		if (snowball.intersects(tree)) {
			// Stop the snowball
			snowball.velocityX *= -0.3;
			snowball.velocityY *= -0.3;
			// Push snowball away from tree
			var pushX = snowball.x - tree.x;
			var pushY = snowball.y - tree.y;
			var pushDistance = Math.sqrt(pushX * pushX + pushY * pushY);
			if (pushDistance > 0) {
				pushX /= pushDistance;
				pushY /= pushDistance;
				snowball.x = tree.x + pushX * 150;
				snowball.y = tree.y + pushY * 150;
			}
			LK.getSound('hit').play();
			LK.effects.flashObject(tree, 0xff0000, 300);
		}
	}
	// Check if reached fence
	if (snowball.y <= 900 && !gameWon) {
		gameWon = true;
		LK.getSound('win').play();
		LK.effects.flashScreen(0x00ff00, 1000);
		// Update instruction text
		instructionText.setText('Success! Snowball reached the fence!');
		// Add score and show win
		LK.setScore(100);
		LK.setTimeout(function () {
			LK.showYouWin();
		}, 1500);
	}
	// Game over if snowball gets stuck at bottom for too long
	if (snowball.y > 2500 && !snowball.isMoving) {
		var stuckTimer = snowball.stuckTimer || 0;
		snowball.stuckTimer = stuckTimer + 1;
		if (snowball.stuckTimer > 180) {
			// 3 seconds at 60fps
			LK.effects.flashScreen(0xff0000, 1000);
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 1000);
		}
	} else {
		snowball.stuckTimer = 0;
	}
};