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

/**** 
* Classes
****/ 
var CutPiece = Container.expand(function () {
	var self = Container.call(this);
	var piece = self.attachAsset('cutPiece', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.animate = function (direction, blockWidth) {
		// Set initial appearance
		piece.alpha = 1;
		piece.width = blockWidth;
		// Animate piece falling and rotating
		var fallDirection = direction === 'left' ? -1 : 1;
		tween(self, {
			x: self.x + fallDirection * 400,
			y: self.y + 600,
			rotation: fallDirection * Math.PI * 2
		}, {
			duration: 1200,
			easing: tween.easeIn
		});
		tween(piece, {
			alpha: 0
		}, {
			duration: 1200,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
var Particle = Container.expand(function () {
	var self = Container.call(this);
	var particle = self.attachAsset('cutPiece', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	particle.width = 20;
	particle.height = 20;
	self.animate = function (velocityX, velocityY, color) {
		// Set particle color
		particle.tint = color || 0xFFFFFF;
		// Set initial velocity
		self.velocityX = velocityX;
		self.velocityY = velocityY;
		// Add gravity effect
		self.gravity = 0.5;
		// Set particle lifetime
		self.life = 60; // 1 second at 60fps
		self.maxLife = self.life;
	};
	self.update = function () {
		if (self.life <= 0) {
			self.destroy();
			return;
		}
		// Update position with velocity
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Apply gravity
		self.velocityY += self.gravity;
		// Fade out over time
		var alpha = self.life / self.maxLife;
		particle.alpha = alpha;
		// Reduce life
		self.life--;
	};
	return self;
});
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 particles = [];
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 = 0; // Rope starts at top of screen
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);
// Natural pendulum swing variables
var swingTime = 0;
var swingSpeed = 0.03; // Controls swing speed
var swingAmplitude = 1.2; // Controls swing range (max rotation) - increased for wider swing
// 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 || swingingBlock.falling) 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 = 25; // Start with constant speed
	swingingBlock.falling = true;
};
// Update function for falling blocks
game.update = function () {
	// Update particles
	for (var i = particles.length - 1; i >= 0; i--) {
		var particle = particles[i];
		if (particle.destroyed) {
			particles.splice(i, 1);
		}
	}
	// Update rope swing with natural pendulum motion
	if (rope && !swingingBlock.falling) {
		// Gradually increase swing speed based on score - every 5 blocks
		var currentSwingSpeed = swingSpeed + Math.floor(LK.getScore() / 5) * 0.005; // Increase speed by 0.005 every 5 blocks
		swingTime += currentSwingSpeed;
		rope.rotation = Math.sin(swingTime) * swingAmplitude;
		// Add vertical swinging motion to the swinging block
		var verticalOffset = Math.cos(swingTime * 2) * 30; // Vertical swing with smaller amplitude
		swingingBlock.y = rope.height + 100 + verticalOffset;
	}
	if (swingingBlock.falling) {
		// Use constant falling speed instead of accelerating gravity
		swingingBlock.velocityY = 25; // Fixed falling speed
		swingingBlock.y += swingingBlock.velocityY;
		// Add rotation animation to falling block
		if (!swingingBlock.rotationStarted) {
			swingingBlock.rotationStarted = true;
			tween(swingingBlock, {
				rotation: swingingBlock.rotation + Math.PI * 4 // 2 full rotations
			}, {
				duration: 2000,
				easing: tween.linear
			});
		}
		// Check collision with any stacked block using built-in intersects method
		var hasCollision = false;
		for (var i = 0; i < stackedBlocks.length; i++) {
			var block = stackedBlocks[i];
			if (swingingBlock.intersects(block)) {
				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 block is close enough to the top of the target block to land
				var blockBottom = swingingBlock.y + swingingBlock.height / 2;
				var targetTop = targetBlock.y - targetBlock.height / 2;
				var landingDistance = Math.abs(blockBottom - targetTop);
				// Only land if we're within reasonable landing distance (less than falling speed)
				if (landingDistance <= 30) {
					// Award 1 point
					LK.setScore(LK.getScore() + 1);
					scoreTxt.setText('Blocks: ' + LK.getScore());
					// Calculate collision overlap and trim the block
					var targetLeft = targetBlock.x - targetBlock.width / 2;
					var targetRight = targetBlock.x + targetBlock.width / 2;
					var swingingLeft = swingingBlock.x - swingingBlock.width / 2;
					var swingingRight = swingingBlock.x + swingingBlock.width / 2;
					// Find the overlapping area
					var overlapLeft = Math.max(targetLeft, swingingLeft);
					var overlapRight = Math.min(targetRight, swingingRight);
					var overlapWidth = overlapRight - overlapLeft;
					// Only proceed if there's actual overlap
					if (overlapWidth > 0) {
						// Place block exactly on top of target block
						swingingBlock.falling = false;
						swingingBlock.velocityY = 0;
						swingingBlock.y = targetBlock.y - 256; // Place exactly one block height above
						// Stop rotation animation and reset to straight position
						tween.stop(swingingBlock, {
							rotation: true
						});
						swingingBlock.rotation = 0;
						// Add collision impact animation
						// Scale the landing block and target block for impact effect
						var originalScale = swingingBlock.scaleX;
						swingingBlock.scaleX = originalScale * 1.2;
						swingingBlock.scaleY = originalScale * 1.2;
						targetBlock.scaleX = originalScale * 1.1;
						targetBlock.scaleY = originalScale * 1.1;
						// Animate back to normal size
						tween(swingingBlock, {
							scaleX: originalScale,
							scaleY: originalScale
						}, {
							duration: 300,
							easing: tween.easeOut
						});
						tween(targetBlock, {
							scaleX: originalScale,
							scaleY: originalScale
						}, {
							duration: 300,
							easing: tween.easeOut
						});
						// Create particle explosion effect
						var particleCount = 8;
						var collisionCenterX = swingingBlock.x;
						var collisionCenterY = swingingBlock.y;
						for (var p = 0; p < particleCount; p++) {
							var particle = new Particle();
							particle.x = collisionCenterX + (Math.random() - 0.5) * 50;
							particle.y = collisionCenterY + (Math.random() - 0.5) * 30;
							// Create random velocity directions
							var angle = Math.PI * 2 * p / particleCount + (Math.random() - 0.5) * 0.5;
							var speed = 8 + Math.random() * 6;
							var velocityX = Math.cos(angle) * speed;
							var velocityY = Math.sin(angle) * speed - Math.random() * 5; // Bias upward
							// Random particle colors (yellows, oranges, whites)
							var colors = [0xFFD700, 0xFFA500, 0xFFFFFF, 0xFFE4B5, 0xFFF8DC];
							var color = colors[Math.floor(Math.random() * colors.length)];
							particle.animate(velocityX, velocityY, color);
							particles.push(particle);
							game.addChild(particle);
						}
						// Add screen shake effect by moving the game container
						var originalGameX = game.x;
						var originalGameY = game.y;
						var shakeIntensity = 15;
						// Quick shake animation
						tween(game, {
							x: originalGameX + shakeIntensity,
							y: originalGameY + shakeIntensity * 0.5
						}, {
							duration: 50,
							easing: tween.linear,
							onFinish: function onFinish() {
								tween(game, {
									x: originalGameX - shakeIntensity * 0.8,
									y: originalGameY - shakeIntensity * 0.3
								}, {
									duration: 50,
									easing: tween.linear,
									onFinish: function onFinish() {
										tween(game, {
											x: originalGameX,
											y: originalGameY
										}, {
											duration: 100,
											easing: tween.easeOut
										});
									}
								});
							}
						});
						// Create cut pieces for trimmed parts
						var leftTrimmed = swingingLeft < overlapLeft;
						var rightTrimmed = swingingRight > overlapRight;
						if (leftTrimmed) {
							// Create cut piece for left trimmed part
							var leftCutPiece = new CutPiece();
							game.addChild(leftCutPiece);
							var leftTrimWidth = overlapLeft - swingingLeft;
							leftCutPiece.x = swingingLeft + leftTrimWidth / 2;
							leftCutPiece.y = swingingBlock.y;
							leftCutPiece.animate('left', leftTrimWidth);
						}
						if (rightTrimmed) {
							// Create cut piece for right trimmed part
							var rightCutPiece = new CutPiece();
							game.addChild(rightCutPiece);
							var rightTrimWidth = swingingRight - overlapRight;
							rightCutPiece.x = overlapRight + rightTrimWidth / 2;
							rightCutPiece.y = swingingBlock.y;
							rightCutPiece.animate('right', rightTrimWidth);
						}
						// Calculate how much of the original block remains
						var originalWidth = 280; // Original block width
						var remainingPercentage = overlapWidth / originalWidth * 100;
						// Check if 95% or more was trimmed (only 5% or less remains)
						if (remainingPercentage <= 5) {
							// Game over - too much of the block was cut off
							gameActive = false;
							LK.showGameOver();
							return;
						}
						// Trim the block to only show the overlapping area
						var newCenterX = overlapLeft + overlapWidth / 2;
						swingingBlock.x = newCenterX;
						swingingBlock.width = overlapWidth;
						stackedBlocks.push(swingingBlock);
					} else {
						// No overlap, block falls off
						swingingBlock.falling = true;
					}
					// Update stack height to the new top
					stackHeight = swingingBlock.y;
					// After 2 blocks are placed (3rd block landing), start sliding all blocks down
					if (LK.getScore() > 2) {
						// Animate all blocks sliding down by one block height (256px)
						for (var b = 0; b < stackedBlocks.length; b++) {
							var block = stackedBlocks[b];
							tween(block, {
								y: block.y + 256
							}, {
								duration: 800,
								easing: tween.easeInOut
							});
						}
						// Get the bottom block for destruction after animation
						var bottomBlock = stackedBlocks[0];
						// Set a timeout to destroy the bottom block after animation completes
						LK.setTimeout(function () {
							bottomBlock.destroy();
							stackedBlocks.splice(0, 1);
						}, 800);
					}
					// Create new swinging block
					swingingBlock = LK.getAsset('swingingBlock', {
						anchorX: 0.5,
						anchorY: 0.5
					});
					swingingBlock.x = 0;
					swingingBlock.y = rope.height + 100;
					swingingBlock.rotationStarted = false; // Reset rotation flag
					rope.addChild(swingingBlock);
				} else {
					// Not close enough to land - 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();
		}
	}
};
;