/**** 
* Classes
****/ 
// Base block (foundation)
var BaseBlock = Container.expand(function () {
	var self = Container.call(this);
	var baseAsset = self.attachAsset('baseBlock', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 600,
		height: 100
	});
	return self;
});
// Block class for stackable blocks
var Block = Container.expand(function () {
	var self = Container.call(this);
	// Default block width/height, can be overridden
	self.blockWidth = 600;
	self.blockHeight = 100;
	self.isPerfect = false;
	// Attach block asset
	var blockAsset = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: self.blockWidth,
		height: self.blockHeight
	});
	self.setBlockSize = function (width, height) {
		self.blockWidth = width;
		self.blockHeight = height;
		blockAsset.width = width;
		blockAsset.height = height;
	};
	self.setBlockColor = function (colorId) {
		blockAsset.color = colorId;
		blockAsset.tint = colorId;
	};
	self.flashPerfect = function () {
		// Flash green for perfect drop (no tween)
		blockAsset.tint = 0x2ecc40;
		// Restore after a short delay
		LK.setTimeout(function () {
			blockAsset.tint = 0x3498db;
		}, 200);
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x888888
});

/**** 
* Game Code
****/ 
// (Background is now set by backgroundColor, no rectangle needed)
// Sound for perfect drop
// Perfect effect: green rectangle
// Base block: dark gray
// Block asset: blue rectangle
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var BLOCK_START_WIDTH = 600;
var BLOCK_HEIGHT = 100;
var BLOCK_MIN_WIDTH = 60;
var BLOCK_MOVE_MARGIN = 120; // Margin from edge for block movement
var BASE_Y = GAME_HEIGHT - 300; // Y position for base block
// Game state
var stackBlocks = []; // Array of stacked blocks (bottom to top)
var currentBlock = null; // The moving block
var currentDirection = 1; // 1: right, -1: left
var currentSpeed = 8; // Initial horizontal speed (pixels per frame)
var blockLevel = 0; // Number of blocks stacked (score)
var isDropping = false; // Prevent double tap
var lastBlockX = GAME_WIDTH / 2; // X position of last stacked block
var lastBlockWidth = BLOCK_START_WIDTH; // Width of last stacked block
var lastBlockY = BASE_Y - BLOCK_HEIGHT; // Y of last stacked block
var gameOver = false;
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Helper: Center X
function getCenterX() {
	return GAME_WIDTH / 2;
}
// Create base block
var baseBlock = new BaseBlock();
baseBlock.x = getCenterX();
baseBlock.y = BASE_Y;
game.addChild(baseBlock);
// Add base block to stack
stackBlocks.push({
	x: baseBlock.x,
	y: baseBlock.y,
	width: BLOCK_START_WIDTH,
	height: BLOCK_HEIGHT,
	blockObj: baseBlock
});
// Start first block
function spawnBlock() {
	var block = new Block();
	block.setBlockSize(lastBlockWidth, BLOCK_HEIGHT);
	block.x = BLOCK_MOVE_MARGIN + block.blockWidth / 2;
	block.y = lastBlockY - BLOCK_HEIGHT;
	blockLevel += 1;
	currentDirection = 1;
	currentSpeed = 8 + Math.floor(blockLevel / 8); // Increase speed as tower grows
	isDropping = false;
	currentBlock = block;
	// Change block color each time a new block is spawned
	// Use a simple color palette and pick a random color different from the previous block
	var blockColors = [0x008f1d, 0x3498db, 0xe67e22, 0xe74c3c, 0x9b59b6, 0xf1c40f, 0x1abc9c];
	if (typeof lastBlockColorIdx === "undefined") {
		var lastBlockColorIdx = -1;
	}
	var colorIdx;
	do {
		colorIdx = Math.floor(Math.random() * blockColors.length);
	} while (colorIdx === lastBlockColorIdx && blockColors.length > 1);
	lastBlockColorIdx = colorIdx;
	block.setBlockColor(blockColors[colorIdx]);
	game.addChild(block);
}
// Drop logic
function dropBlock() {
	if (isDropping || gameOver) {
		return;
	}
	isDropping = true;
	// Get last stacked block
	var prev = stackBlocks[stackBlocks.length - 1];
	var prevLeft = prev.x - prev.width / 2;
	var prevRight = prev.x + prev.width / 2;
	var currLeft = currentBlock.x - currentBlock.blockWidth / 2;
	var currRight = currentBlock.x + currentBlock.blockWidth / 2;
	// Calculate overlap
	var overlapLeft = Math.max(prevLeft, currLeft);
	var overlapRight = Math.min(prevRight, currRight);
	var overlapWidth = overlapRight - overlapLeft;
	// Perfect drop threshold (within 6px)
	var perfect = Math.abs(currLeft - prevLeft) < 6 && Math.abs(currRight - prevRight) < 6;
	if (overlapWidth <= 0) {
		// No overlap, game over
		endGame();
		return;
	}
	// Trim block to overlap
	if (overlapWidth < currentBlock.blockWidth) {
		// Animate trimming
		var trimAmount = currentBlock.blockWidth - overlapWidth;
		var trimSide = currLeft < prevLeft ? 'left' : 'right';
		// Instantly set block to new width and position (no tween)
		var newX = overlapLeft + overlapWidth / 2;
		currentBlock.x = newX;
		currentBlock.setBlockSize(overlapWidth, BLOCK_HEIGHT);
	}
	// Perfect drop effect
	if (perfect) {
		currentBlock.flashPerfect();
		LK.getSound('perfect').play();
		LK.setScore(LK.getScore() + 2);
	} else {
		LK.getSound('drop').play();
		LK.setScore(LK.getScore() + 1);
	}
	scoreTxt.setText(LK.getScore());
	// Instantly set block drop (no tween)
	currentBlock.y = lastBlockY;
	// Add to stack
	stackBlocks.push({
		x: currentBlock.x,
		y: lastBlockY,
		width: overlapWidth,
		height: BLOCK_HEIGHT,
		blockObj: currentBlock
	});
	lastBlockX = currentBlock.x;
	lastBlockWidth = overlapWidth;
	lastBlockY -= BLOCK_HEIGHT;
	// Check for too small
	if (overlapWidth < BLOCK_MIN_WIDTH) {
		endGame();
		return;
	}
	// Spawn next block
	spawnBlock();
}
// End game
function endGame() {
	if (gameOver) {
		return;
	}
	gameOver = true;
	LK.effects.flashScreen(0xff0000, 800);
	LK.showGameOver();
}
// Handle tap anywhere except top left 100x100
game.down = function (x, y, obj) {
	if (gameOver) {
		return;
	}
	if (x < 100 && y < 100) {
		return;
	} // Don't allow tap in top left
	dropBlock();
};
// Move block horizontally
game.update = function () {
	if (gameOver) {
		return;
	}
	if (!currentBlock) {
		// First block
		lastBlockX = getCenterX();
		lastBlockWidth = BLOCK_START_WIDTH;
		lastBlockY = BASE_Y - BLOCK_HEIGHT;
		spawnBlock();
		LK.setScore(0);
		scoreTxt.setText('0');
		return;
	}
	if (!isDropping) {
		// Move block left/right
		currentBlock.x += currentDirection * currentSpeed;
		var leftEdge = BLOCK_MOVE_MARGIN + currentBlock.blockWidth / 2;
		var rightEdge = GAME_WIDTH - BLOCK_MOVE_MARGIN - currentBlock.blockWidth / 2;
		if (currentBlock.x >= rightEdge) {
			currentBlock.x = rightEdge;
			currentDirection = -1;
		}
		if (currentBlock.x <= leftEdge) {
			currentBlock.x = leftEdge;
			currentDirection = 1;
		}
	}
};
// Reset game state on restart
game.on('reset', function () {
	// Remove all blocks except base
	for (var i = 1; i < stackBlocks.length; i++) {
		if (stackBlocks[i].blockObj) {
			stackBlocks[i].blockObj.destroy();
		}
	}
	stackBlocks = [stackBlocks[0]];
	lastBlockX = getCenterX();
	lastBlockWidth = BLOCK_START_WIDTH;
	lastBlockY = BASE_Y - BLOCK_HEIGHT;
	blockLevel = 0;
	isDropping = false;
	gameOver = false;
	if (currentBlock) {
		currentBlock.destroy();
		currentBlock = null;
	}
	LK.setScore(0);
	scoreTxt.setText('0');
	spawnBlock();
});