/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	best: 0
});

/**** 
* Classes
****/ 
// IceBlock class: represents a single moving or stacked ice block
var IceBlock = Container.expand(function () {
	var self = Container.call(this);
	// Default block size (will be set on creation)
	self.blockWidth = 900;
	self.blockHeight = 70;
	self.color = 0xB3E6FF; // Light blue ice color
	// Create and attach the block asset
	var blockAsset = self.attachAsset('iceBlock', {
		width: self.blockWidth,
		height: self.blockHeight,
		color: self.color,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Update block asset size if changed
	self.setSize = function (w, h) {
		self.blockWidth = w;
		self.blockHeight = h;
		blockAsset.width = w;
		blockAsset.height = h;
	};
	// Set color (for possible effects)
	self.setColor = function (color) {
		self.color = color;
		blockAsset.color = color;
	};
	// Animate block to a new position (used for drop)
	self.animateTo = function (targetY, duration, onFinish) {
		tween(self, {
			y: targetY
		}, {
			duration: duration,
			easing: tween.cubicOut,
			onFinish: onFinish
		});
	};
	// Animate block shrink (used for misaligned drops)
	self.animateShrink = function (newWidth, duration, _onFinish) {
		tween(self, {
			blockWidth: newWidth
		}, {
			duration: duration,
			easing: tween.cubicInOut,
			onFinish: function onFinish() {
				self.setSize(newWidth, self.blockHeight);
				if (_onFinish) _onFinish();
			}
		});
	};
	// For collision and alignment calculations
	self.getLeft = function () {
		return self.x - self.blockWidth / 2;
	};
	self.getRight = function () {
		return self.x + self.blockWidth / 2;
	};
	// For updating asset size if tweened
	self.update = function () {
		// If tweening blockWidth, update asset
		if (blockAsset.width !== self.blockWidth) {
			blockAsset.width = self.blockWidth;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Tween plugin for block drop and shrink animations
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
// Add background image to the game scene
var bg = LK.getAsset('iceBg', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0,
	width: GAME_WIDTH,
	height: GAME_HEIGHT
});
game.addChild(bg);
var START_BLOCK_WIDTH = 900;
var BLOCK_HEIGHT = 70;
var BLOCK_COLOR = 0xB3E6FF;
var BLOCK_SPEED = 16; // px per frame
var MIN_BLOCK_WIDTH = 80; // Minimum width before game over
var DROP_ANIMATION_TIME = 180; // ms
var SHRINK_ANIMATION_TIME = 120; // ms
var START_Y = GAME_HEIGHT - 400; // Y position of the first block
// Game state
var stack = []; // Array of stacked blocks (bottom to top)
var movingBlock = null; // The current moving block
var movingDirection = 1; // 1 = right, -1 = left
var isDropping = false; // Prevents double drop
var scoreTxt = null;
var bestTxt = null;
var currentScore = 0;
var bestScore = 0;
// Special ability state
var specialReady = true;
var specialCooldown = 0; // ms remaining
var SPECIAL_COOLDOWN_TIME = 5000; // 5 seconds cooldown
var specialBtn = null;
// Storage for best score
if (typeof storage.best === 'number') {
	bestScore = storage.best;
}
// Score display
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
bestTxt = new Text2('Best: ' + bestScore, {
	size: 60,
	fill: 0xAEEFFF
});
bestTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(bestTxt);
bestTxt.y = 120;
// Special ability button
specialBtn = new Text2('ICE POWER', {
	size: 70,
	fill: specialReady ? 0x00eaff : 0x888888
});
specialBtn.anchor.set(0.5, 0.5);
LK.gui.bottom.addChild(specialBtn);
specialBtn.y = -120; // Raise above bottom edge
specialBtn.x = 0; // Centered
// Cooldown text
var cooldownTxt = new Text2('', {
	size: 40,
	fill: 0xAEEFFF
});
cooldownTxt.anchor.set(0.5, 0.5);
LK.gui.bottom.addChild(cooldownTxt);
cooldownTxt.y = -40;
cooldownTxt.x = 0;
// Helper: update score display
function updateScoreDisplay() {
	scoreTxt.setText(currentScore);
	if (currentScore > bestScore) {
		bestScore = currentScore;
		storage.best = bestScore;
		bestTxt.setText('Best: ' + bestScore);
	}
}
// Helper: center X for a block
function getCenterX() {
	return GAME_WIDTH / 2;
}
// Helper: spawn a new moving block
function spawnMovingBlock(width) {
	var block = new IceBlock();
	block.setSize(width, BLOCK_HEIGHT);
	block.setColor(BLOCK_COLOR);
	// Start above the last block, or at START_Y if first
	var y = START_Y - stack.length * BLOCK_HEIGHT;
	block.y = y;
	block.blockHeight = BLOCK_HEIGHT;
	// Start at left or right edge, alternate each time
	if (stack.length % 2 === 0) {
		block.x = 0 + width / 2;
		movingDirection = 1;
	} else {
		block.x = GAME_WIDTH - width / 2;
		movingDirection = -1;
	}
	game.addChild(block);
	return block;
}
// Helper: get top block (last in stack)
function getTopBlock() {
	if (stack.length === 0) return null;
	return stack[stack.length - 1];
}
// Helper: drop the moving block
function dropBlock() {
	if (!movingBlock || isDropping) return;
	isDropping = true;
	// Find where the block should land (on top of stack or at START_Y)
	var targetY = START_Y - stack.length * BLOCK_HEIGHT;
	// Animate drop
	movingBlock.animateTo(targetY, DROP_ANIMATION_TIME, function () {
		// After drop, check alignment
		var prevBlock = getTopBlock();
		var overlapLeft, overlapRight, overlapWidth;
		if (prevBlock) {
			// Calculate overlap
			var left = Math.max(movingBlock.getLeft(), prevBlock.getLeft());
			var right = Math.min(movingBlock.getRight(), prevBlock.getRight());
			overlapWidth = right - left;
			if (overlapWidth <= 0 || overlapWidth < MIN_BLOCK_WIDTH) {
				// No overlap or too small: game over
				LK.effects.flashScreen(0xff0000, 800);
				LK.showGameOver();
				return;
			}
			// Shrink block to overlap
			var newWidth = overlapWidth;
			var newX = left + overlapWidth / 2;
			// Animate shrink and move to center of overlap
			tween(movingBlock, {
				x: newX
			}, {
				duration: SHRINK_ANIMATION_TIME,
				easing: tween.cubicInOut
			});
			movingBlock.animateShrink(newWidth, SHRINK_ANIMATION_TIME, function () {
				// Add to stack
				stack.push(movingBlock);
				// Play block placed sound
				LK.getSound('a').play();
				currentScore++;
				updateScoreDisplay();
				// Next block
				nextTurn(newWidth);
			});
		} else {
			// First block, always succeeds
			stack.push(movingBlock);
			// Play block placed sound
			LK.getSound('a').play();
			currentScore = 1;
			updateScoreDisplay();
			nextTurn(movingBlock.blockWidth);
		}
	});
}
// Helper: start next turn
function nextTurn(width) {
	// Check win condition (optional: e.g. 50 blocks)
	if (currentScore >= 50) {
		LK.showYouWin();
		return;
	}
	// Spawn next moving block
	movingBlock = spawnMovingBlock(width);
	isDropping = false;
}
// Game move handler: tap/click anywhere to drop
game.down = function (x, y, obj) {
	// Check if special button pressed
	if (specialBtn && obj && obj.target === specialBtn && specialReady && movingBlock && !isDropping) {
		// Activate special ability: perfect align the block
		specialReady = false;
		specialCooldown = SPECIAL_COOLDOWN_TIME;
		specialBtn.setText('COOLDOWN');
		specialBtn.setStyle({
			fill: 0x888888
		});
		// Instantly align moving block to top of stack (or center if first)
		var prevBlock = getTopBlock();
		if (prevBlock) {
			movingBlock.x = prevBlock.x;
			movingBlock.blockWidth = prevBlock.blockWidth;
			movingBlock.setSize(prevBlock.blockWidth, BLOCK_HEIGHT);
		} else {
			movingBlock.x = getCenterX();
		}
		// Drop the block as if perfectly aligned
		dropBlock();
		return;
	}
	// Normal drop
	if (!isDropping) {
		dropBlock();
	}
};
// Main game update loop
game.update = function () {
	// Move the moving block horizontally
	if (movingBlock && !isDropping) {
		movingBlock.x += movingDirection * BLOCK_SPEED;
		// Bounce at edges
		var halfW = movingBlock.blockWidth / 2;
		if (movingBlock.x + halfW > GAME_WIDTH) {
			movingBlock.x = GAME_WIDTH - halfW;
			movingDirection = -1;
		}
		if (movingBlock.x - halfW < 0) {
			movingBlock.x = halfW;
			movingDirection = 1;
		}
	}
	// Update all blocks (for tweened width)
	for (var i = 0; i < stack.length; i++) {
		if (stack[i].update) stack[i].update();
	}
	if (movingBlock && movingBlock.update) movingBlock.update();
	// Special ability cooldown logic
	if (!specialReady && specialCooldown > 0) {
		specialCooldown -= 1000 / 60; // Approx ms per frame at 60fps
		if (specialCooldown <= 0) {
			specialReady = true;
			specialBtn.setText('ICE POWER');
			specialBtn.setStyle({
				fill: 0x00eaff
			});
			cooldownTxt.setText('');
		} else {
			// Show seconds left
			var secs = Math.ceil(specialCooldown / 1000);
			cooldownTxt.setText('Ready in ' + secs + 's');
		}
	} else if (specialReady) {
		cooldownTxt.setText('');
	}
};
// Game reset: clear stack and start new game
function resetGame() {
	// Remove all blocks
	for (var i = 0; i < stack.length; i++) {
		stack[i].destroy();
	}
	stack = [];
	if (movingBlock) {
		movingBlock.destroy();
		movingBlock = null;
	}
	currentScore = 0;
	updateScoreDisplay();
	// Start first block
	movingBlock = spawnMovingBlock(START_BLOCK_WIDTH);
	isDropping = false;
	// Reset special ability
	specialReady = true;
	specialCooldown = 0;
	if (specialBtn) {
		specialBtn.setText('ICE POWER');
		specialBtn.setStyle({
			fill: 0x00eaff
		});
	}
	if (typeof cooldownTxt !== 'undefined') {
		cooldownTxt.setText('');
	}
}
// Listen for game over to reset
LK.on('gameover', function () {
	// Delay reset to allow game over screen
	LK.setTimeout(function () {
		resetGame();
	}, 800);
});
// Listen for you win to reset
LK.on('youwin', function () {
	LK.setTimeout(function () {
		resetGame();
	}, 1200);
});
// Start the game
resetGame();