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

/**** 
* Classes
****/ 
var StackedBlock = Container.expand(function () {
	var self = Container.call(this);
	var block = self.attachAsset('block', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});

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

/**** 
* Game Code
****/ 
// Game state
var stackedBlocks = [];
var gameHeight = 2732;
var gameWidth = 2048;
var groundLevel = gameHeight - 120;
var stackHeight = 0;
var gameActive = true;
// Create foundation block
var foundation = new StackedBlock();
foundation.x = gameWidth / 2;
foundation.y = gameHeight - 120; // Move to bottom of screen
game.addChild(foundation);
stackedBlocks.push(foundation);
stackHeight = foundation.y;
// Create rope hanging from top center
var rope = LK.getAsset('rope', {
	anchorX: 0.5,
	anchorY: 0
});
rope.x = gameWidth / 2;
rope.y = 200; // Move rope down from top
game.addChild(rope);
// Create swinging block at the end of rope
var swingingBlock = LK.getAsset('swingingBlock', {
	anchorX: 0.5,
	anchorY: 0.5
});
swingingBlock.x = 0;
swingingBlock.y = rope.height + 100; // Extend the rope length by moving block further down
rope.addChild(swingingBlock);
// Start rope swinging animation
function startRopeSwing() {
	// Swing right
	tween(rope, {
		rotation: 0.5
	}, {
		duration: 1500,
		easing: tween.easeInOut,
		onFinish: function onFinish() {
			// Swing left
			tween(rope, {
				rotation: -0.5
			}, {
				duration: 3000,
				easing: tween.easeInOut,
				onFinish: function onFinish() {
					// Swing back right and repeat
					tween(rope, {
						rotation: 0.5
					}, {
						duration: 3000,
						easing: tween.easeInOut,
						onFinish: startRopeSwing
					});
				}
			});
		}
	});
}
// Start the swinging motion
startRopeSwing();
// Score display
var scoreTxt = new Text2('Blocks: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Touch handler to drop the block
game.down = function (x, y, obj) {
	if (!gameActive || !swingingBlock.parent) return;
	// Get the current world position of the swinging block
	var worldPos = rope.toGlobal(swingingBlock.position);
	var gamePos = game.toLocal(worldPos);
	// Detach from rope and add to game
	rope.removeChild(swingingBlock);
	game.addChild(swingingBlock);
	// Set position in game coordinates
	swingingBlock.x = gamePos.x;
	swingingBlock.y = gamePos.y;
	// Add falling velocity
	swingingBlock.velocityY = 0;
	swingingBlock.gravity = 0.8;
	swingingBlock.falling = true;
};
// Update function for falling blocks
game.update = function () {
	if (swingingBlock.falling) {
		swingingBlock.velocityY += swingingBlock.gravity;
		swingingBlock.y += swingingBlock.velocityY;
		// Check collision with any stacked block
		var hasCollision = false;
		for (var i = 0; i < stackedBlocks.length; i++) {
			if (swingingBlock.intersects(stackedBlocks[i])) {
				hasCollision = true;
				break;
			}
		}
		if (hasCollision) {
			// Find the topmost block that the swinging block collided with
			var targetBlock = null;
			var highestY = gameHeight;
			for (var k = 0; k < stackedBlocks.length; k++) {
				if (swingingBlock.intersects(stackedBlocks[k]) && stackedBlocks[k].y < highestY) {
					targetBlock = stackedBlocks[k];
					highestY = stackedBlocks[k].y;
				}
			}
			if (targetBlock) {
				// Check if the swinging block covers at least half of the target block
				var swingingLeft = swingingBlock.x - swingingBlock.width / 2;
				var swingingRight = swingingBlock.x + swingingBlock.width / 2;
				var targetLeft = targetBlock.x - targetBlock.width / 2;
				var targetRight = targetBlock.x + targetBlock.width / 2;
				// Calculate overlap
				var overlapLeft = Math.max(swingingLeft, targetLeft);
				var overlapRight = Math.min(swingingRight, targetRight);
				var overlapWidth = Math.max(0, overlapRight - overlapLeft);
				// Check if overlap is at least half of the target block width
				var requiredCoverage = targetBlock.width / 2;
				if (overlapWidth >= requiredCoverage) {
					// Award 1 point
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText('Blocks: ' + LK.getScore());
					// Place block on stack
					swingingBlock.falling = false;
					swingingBlock.velocityY = 0;
					stackHeight -= 240; // Move stack up by block height
					swingingBlock.y = stackHeight;
					stackedBlocks.push(swingingBlock);
					// If this is the second red block (score 2), start sliding foundation down
					if (LK.getScore() >= 2) {
						// Move foundation and all stacked blocks down by one block height
						for (var j = 0; j < stackedBlocks.length; j++) {
							tween(stackedBlocks[j], {
								y: stackedBlocks[j].y + 240
							}, {
								duration: 500,
								easing: tween.easeInOut
							});
						}
						// Update stack height
						stackHeight += 240;
					}
					// Create new swinging block
					swingingBlock = LK.getAsset('swingingBlock', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					swingingBlock.x = 0;
					swingingBlock.y = rope.height + 100;
					rope.addChild(swingingBlock);
				} else {
					// Not enough coverage - continue falling
					swingingBlock.falling = true;
				}
			}
		}
		// Check if block has fallen below the screen
		else if (swingingBlock.y > gameHeight + 200) {
			// Game over - player missed the target
			gameActive = false;
			LK.showGameOver();
		}
	}
};
;