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

/**** 
* Classes
****/ 
var Candy = Container.expand(function (type, isSpecial) {
	var self = Container.call(this);
	self.candyType = type;
	self.isSpecial = isSpecial || false;
	self.gridX = -1;
	self.gridY = -1;
	self.isMatched = false;
	self.isMoving = false;
	self.isDragging = false;
	// Background removed - only candy graphics remain
	var candyGraphic;
	if (self.isSpecial) {
		candyGraphic = self.attachAsset('specialCandy', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		candyGraphic = self.attachAsset('candy' + type, {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	self.setGridPosition = function (gridX, gridY) {
		self.gridX = gridX;
		self.gridY = gridY;
		self.x = GRID_START_X + gridX * CELL_SIZE;
		self.y = GRID_START_Y + gridY * CELL_SIZE;
	};
	self.animateToPosition = function (targetX, targetY, onComplete) {
		self.isMoving = true;
		tween(self, {
			x: targetX,
			y: targetY
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				self.isMoving = false;
				if (onComplete) onComplete();
			}
		});
	};
	self.markForDestroy = function () {
		self.isMatched = true;
		tween(self, {
			scaleX: 0,
			scaleY: 0,
			alpha: 0
		}, {
			duration: 300,
			easing: tween.easeIn,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	self.down = function (x, y, obj) {
		if (gameState !== 'playing' || self.isMoving) return;
		if (self.isSpecial) {
			// Special candy clicked - clear 2x2 area around it
			var centerX = self.gridX;
			var centerY = self.gridY;
			var candiesDestroyed = 0;
			// Clear 2x2 area around the special candy (including the special candy itself)
			for (var dx = -1; dx <= 1; dx++) {
				for (var dy = -1; dy <= 1; dy++) {
					var targetX = centerX + dx;
					var targetY = centerY + dy;
					if (targetX >= 0 && targetX < GRID_SIZE && targetY >= 0 && targetY < GRID_SIZE) {
						var targetCandy = grid[targetX][targetY];
						if (targetCandy && !targetCandy.isMatched && !targetCandy.isSpecial) {
							targetCandy.markForDestroy();
							grid[targetX][targetY] = null;
							candiesDestroyed++;
							score += 15; // Bonus points for special candy destruction
						}
					}
				}
			}
			scoreText.setText('Score: ' + score);
			LK.getSound('match').play();
			// Drop candies after delay
			LK.setTimeout(function () {
				dropCandies();
			}, 350);
			return; // Exit early for special candies
		}
		selectedCandy = self;
		self.scaleX = 1.1;
		self.scaleY = 1.1;
		self.isDragging = true;
		self.dragStartX = x;
		self.dragStartY = y;
		self.startX = self.x;
		self.startY = self.y;
	};
	self.move = function (x, y, obj) {
		if (self.isDragging && gameState === 'playing' && !self.isMoving) {
			var deltaX = x - self.dragStartX;
			var deltaY = y - self.dragStartY;
			// Determine which direction has the larger movement
			var absDeltaX = Math.abs(deltaX);
			var absDeltaY = Math.abs(deltaY);
			var targetX = self.startX;
			var targetY = self.startY;
			// Only move in the direction with the larger delta, and limit to one cell
			if (absDeltaX > absDeltaY) {
				// Horizontal movement
				if (deltaX > CELL_SIZE / 2 && self.gridX < GRID_SIZE - 1) {
					targetX = self.startX + CELL_SIZE;
				} else if (deltaX < -CELL_SIZE / 2 && self.gridX > 0) {
					targetX = self.startX - CELL_SIZE;
				}
			} else {
				// Vertical movement
				if (deltaY > CELL_SIZE / 2 && self.gridY < GRID_SIZE - 1) {
					targetY = self.startY + CELL_SIZE;
				} else if (deltaY < -CELL_SIZE / 2 && self.gridY > 0) {
					targetY = self.startY - CELL_SIZE;
				}
			}
			self.x = targetX;
			self.y = targetY;
		}
	};
	self.up = function (x, y, obj) {
		if (gameState !== 'playing' || self.isMoving) return;
		if (self.isDragging) {
			self.isDragging = false;
			// Find target grid position based on current visual position
			var targetX = Math.round((self.x - GRID_START_X) / CELL_SIZE);
			var targetY = Math.round((self.y - GRID_START_Y) / CELL_SIZE);
			// Clamp to grid bounds
			targetX = Math.max(0, Math.min(GRID_SIZE - 1, targetX));
			targetY = Math.max(0, Math.min(GRID_SIZE - 1, targetY));
			// If position changed, try to swap
			if (targetX !== self.gridX || targetY !== self.gridY) {
				var targetCandy = grid[targetX][targetY];
				if (targetCandy && targetCandy !== self) {
					// Store original positions
					var originalSelfX = self.gridX;
					var originalSelfY = self.gridY;
					var originalTargetX = targetCandy.gridX;
					var originalTargetY = targetCandy.gridY;
					// Temporarily swap candies in grid to check for matches
					grid[self.gridX][self.gridY] = targetCandy;
					grid[targetX][targetY] = self;
					var tempGridX = self.gridX;
					var tempGridY = self.gridY;
					self.gridX = targetX;
					self.gridY = targetY;
					targetCandy.gridX = tempGridX;
					targetCandy.gridY = tempGridY;
					// Check if this swap creates any matches
					var selfMatches = findMatchesAt(self.gridX, self.gridY, self.candyType);
					var targetMatches = findMatchesAt(targetCandy.gridX, targetCandy.gridY, targetCandy.candyType);
					if (selfMatches.length >= 3 || targetMatches.length >= 3) {
						// Valid move - animate both candies to their new positions
						var targetX1 = GRID_START_X + self.gridX * CELL_SIZE;
						var targetY1 = GRID_START_Y + self.gridY * CELL_SIZE;
						var targetX2 = GRID_START_X + targetCandy.gridX * CELL_SIZE;
						var targetY2 = GRID_START_Y + targetCandy.gridY * CELL_SIZE;
						self.animateToPosition(targetX1, targetY1, function () {
							checkForMatches();
						});
						targetCandy.animateToPosition(targetX2, targetY2);
					} else {
						// Invalid move - revert grid positions and return both candies to original positions
						self.gridX = originalSelfX;
						self.gridY = originalSelfY;
						targetCandy.gridX = originalTargetX;
						targetCandy.gridY = originalTargetY;
						grid[originalSelfX][originalSelfY] = self;
						grid[originalTargetX][originalTargetY] = targetCandy;
						// Return both candies to original positions
						tween(self, {
							x: GRID_START_X + self.gridX * CELL_SIZE,
							y: GRID_START_Y + self.gridY * CELL_SIZE
						}, {
							duration: 300,
							easing: tween.easeOut
						});
						tween(targetCandy, {
							x: GRID_START_X + targetCandy.gridX * CELL_SIZE,
							y: GRID_START_Y + targetCandy.gridY * CELL_SIZE
						}, {
							duration: 300,
							easing: tween.easeOut
						});
					}
				} else {
					// Return to original position
					tween(self, {
						x: GRID_START_X + self.gridX * CELL_SIZE,
						y: GRID_START_Y + self.gridY * CELL_SIZE
					}, {
						duration: 300,
						easing: tween.easeOut
					});
				}
			} else {
				// Return to original position
				tween(self, {
					x: GRID_START_X + self.gridX * CELL_SIZE,
					y: GRID_START_Y + self.gridY * CELL_SIZE
				}, {
					duration: 300,
					easing: tween.easeOut
				});
			}
			self.scaleX = 1;
			self.scaleY = 1;
			selectedCandy = null;
		} else if (selectedCandy === self) {
			self.scaleX = 1;
			self.scaleY = 1;
			selectedCandy = null;
		} else if (selectedCandy && isAdjacent(selectedCandy, self)) {
			attemptSwap(selectedCandy, self);
			selectedCandy.scaleX = 1;
			selectedCandy.scaleY = 1;
			selectedCandy = null;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game();

/**** 
* Game Code
****/ 
// Bright Red
// Bright Green
// Bright Blue
// Bright Yellow
// Bright Magenta
// Bright Cyan
var GRID_SIZE = 12;
var CELL_SIZE = 140;
var GRID_START_X = (2048 - GRID_SIZE * CELL_SIZE) / 2;
var GRID_START_Y = (2732 - GRID_SIZE * CELL_SIZE) / 2;
var CANDY_TYPES = 6;
var grid = [];
var selectedCandy = null;
var gameState = 'playing';
var score = 0;
var moves = 30;
var targetScore = 1000;
// Add score display
var scoreText = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
scoreText.y = 100;
function initializeGrid() {
	grid = [];
	for (var x = 0; x < GRID_SIZE; x++) {
		grid[x] = [];
		for (var y = 0; y < GRID_SIZE; y++) {
			var candyType = Math.floor(Math.random() * CANDY_TYPES) + 1;
			var candy = new Candy(candyType);
			candy.setGridPosition(x, y);
			grid[x][y] = candy;
			game.addChild(candy);
		}
	}
	// Remove initial matches
	removeInitialMatches();
}
function removeInitialMatches() {
	var hasMatches = true;
	var iterations = 0;
	while (hasMatches && iterations < 10) {
		hasMatches = false;
		for (var x = 0; x < GRID_SIZE; x++) {
			for (var y = 0; y < GRID_SIZE; y++) {
				if (wouldCreateMatch(x, y, grid[x][y].candyType)) {
					var newType = Math.floor(Math.random() * CANDY_TYPES) + 1;
					grid[x][y].destroy();
					var candy = new Candy(newType);
					candy.setGridPosition(x, y);
					grid[x][y] = candy;
					game.addChild(candy);
					hasMatches = true;
				}
			}
		}
		iterations++;
	}
}
function wouldCreateMatch(x, y, type) {
	// Check horizontal matches
	var horizontalCount = 1;
	var left = x - 1;
	while (left >= 0 && grid[left][y] && grid[left][y].candyType === type) {
		horizontalCount++;
		left--;
	}
	var right = x + 1;
	while (right < GRID_SIZE && grid[right][y] && grid[right][y].candyType === type) {
		horizontalCount++;
		right++;
	}
	// Check vertical matches
	var verticalCount = 1;
	var up = y - 1;
	while (up >= 0 && grid[x][up] && grid[x][up].candyType === type) {
		verticalCount++;
		up--;
	}
	var down = y + 1;
	while (down < GRID_SIZE && grid[x][down] && grid[x][down].candyType === type) {
		verticalCount++;
		down++;
	}
	return horizontalCount >= 3 || verticalCount >= 3;
}
function isAdjacent(candy1, candy2) {
	var dx = Math.abs(candy1.gridX - candy2.gridX);
	var dy = Math.abs(candy1.gridY - candy2.gridY);
	return dx === 1 && dy === 0 || dx === 0 && dy === 1;
}
function attemptSwap(candy1, candy2) {
	if (moves <= 0) return;
	// Temporarily swap positions
	var tempX = candy1.gridX;
	var tempY = candy1.gridY;
	candy1.gridX = candy2.gridX;
	candy1.gridY = candy2.gridY;
	candy2.gridX = tempX;
	candy2.gridY = tempY;
	grid[candy1.gridX][candy1.gridY] = candy1;
	grid[candy2.gridX][candy2.gridY] = candy2;
	// Check if this creates matches
	var matches1 = findMatches(candy1.gridX, candy1.gridY);
	var matches2 = findMatches(candy2.gridX, candy2.gridY);
	if (matches1.length > 0 || matches2.length > 0) {
		// Valid swap - animate
		moves--;
		// Moves text removed
		var targetX1 = GRID_START_X + candy1.gridX * CELL_SIZE;
		var targetY1 = GRID_START_Y + candy1.gridY * CELL_SIZE;
		var targetX2 = GRID_START_X + candy2.gridX * CELL_SIZE;
		var targetY2 = GRID_START_Y + candy2.gridY * CELL_SIZE;
		candy1.animateToPosition(targetX1, targetY1);
		candy2.animateToPosition(targetX2, targetY2, function () {
			LK.getSound('swap').play();
			processMatches();
		});
	} else {
		// Invalid swap - revert
		candy1.gridX = tempX;
		candy1.gridY = tempY;
		candy2.gridX = candy2.gridX;
		candy2.gridY = candy2.gridY;
		grid[candy1.gridX][candy1.gridY] = candy1;
		grid[candy2.gridX][candy2.gridY] = candy2;
	}
}
function findMatches(x, y) {
	var matches = [];
	var candy = grid[x][y];
	if (!candy) return matches;
	var type = candy.candyType;
	// Check horizontal matches
	var horizontal = [candy];
	var left = x - 1;
	while (left >= 0 && grid[left][y] && grid[left][y].candyType === type) {
		horizontal.unshift(grid[left][y]);
		left--;
	}
	var right = x + 1;
	while (right < GRID_SIZE && grid[right][y] && grid[right][y].candyType === type) {
		horizontal.push(grid[right][y]);
		right++;
	}
	if (horizontal.length >= 3) {
		matches = matches.concat(horizontal);
	}
	// Check vertical matches
	var vertical = [candy];
	var up = y - 1;
	while (up >= 0 && grid[x][up] && grid[x][up].candyType === type) {
		vertical.unshift(grid[x][up]);
		up--;
	}
	var down = y + 1;
	while (down < GRID_SIZE && grid[x][down] && grid[x][down].candyType === type) {
		vertical.push(grid[x][down]);
		down++;
	}
	if (vertical.length >= 3) {
		matches = matches.concat(vertical);
	}
	return matches;
}
function processMatches() {
	var allMatches = [];
	var specialCandyPositions = [];
	var processedCandies = [];
	// Find all matches on the grid
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] && !grid[x][y].isMatched) {
				// Check horizontal matches (3+ in a row)
				var horizontalMatches = [];
				var currentType = grid[x][y].candyType;
				var startX = x;
				// Find consecutive candies of same type horizontally
				while (startX < GRID_SIZE && grid[startX][y] && grid[startX][y].candyType === currentType) {
					horizontalMatches.push(grid[startX][y]);
					startX++;
				}
				// If we found 4 or more consecutive horizontal matches, mark for special candy
				if (horizontalMatches.length >= 4) {
					// Create special candy at the center of the match
					var centerX = Math.floor(x + (horizontalMatches.length - 1) / 2);
					specialCandyPositions.push({
						x: centerX,
						y: y,
						type: currentType
					});
				}
				// If we found 3 or more consecutive horizontal matches
				if (horizontalMatches.length >= 3) {
					for (var i = 0; i < horizontalMatches.length; i++) {
						if (allMatches.indexOf(horizontalMatches[i]) === -1) {
							allMatches.push(horizontalMatches[i]);
						}
					}
				}
				// Check vertical matches (3+ in a column)
				var verticalMatches = [];
				var startY = y;
				// Find consecutive candies of same type vertically
				while (startY < GRID_SIZE && grid[x][startY] && grid[x][startY].candyType === currentType) {
					verticalMatches.push(grid[x][startY]);
					startY++;
				}
				// If we found 4 or more consecutive vertical matches, mark for special candy
				if (verticalMatches.length >= 4) {
					// Create special candy at the center of the match
					var centerY = Math.floor(y + (verticalMatches.length - 1) / 2);
					specialCandyPositions.push({
						x: x,
						y: centerY,
						type: currentType
					});
				}
				// If we found 3 or more consecutive vertical matches
				if (verticalMatches.length >= 3) {
					for (var i = 0; i < verticalMatches.length; i++) {
						if (allMatches.indexOf(verticalMatches[i]) === -1) {
							allMatches.push(verticalMatches[i]);
						}
					}
				}
			}
		}
	}
	if (allMatches.length > 0) {
		// Mark matches for destruction and update score
		for (var i = 0; i < allMatches.length; i++) {
			var candy = allMatches[i];
			if (!candy.isSpecial) {
				candy.markForDestroy();
				grid[candy.gridX][candy.gridY] = null;
				score += 10;
			}
		}
		// Create only one special candy from the first valid position
		if (specialCandyPositions.length > 0) {
			var pos = specialCandyPositions[0]; // Only use the first position
			if (grid[pos.x][pos.y] === null) {
				var specialCandy = new Candy(pos.type, true);
				specialCandy.setGridPosition(pos.x, pos.y);
				grid[pos.x][pos.y] = specialCandy;
				game.addChild(specialCandy);
				// Add sparkle effect to special candy
				tween(specialCandy, {
					scaleX: 1.2,
					scaleY: 1.2
				}, {
					duration: 200,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(specialCandy, {
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 200,
							easing: tween.easeIn
						});
					}
				});
			}
		}
		scoreText.setText('Score: ' + score);
		LK.getSound('match').play();
		// Drop candies after delay
		LK.setTimeout(function () {
			dropCandies();
		}, 350);
	}
}
function dropCandies() {
	var hasDropped = false;
	// Drop existing candies
	for (var x = 0; x < GRID_SIZE; x++) {
		var writeIndex = GRID_SIZE - 1;
		for (var y = GRID_SIZE - 1; y >= 0; y--) {
			if (grid[x][y] !== null) {
				if (y !== writeIndex) {
					grid[x][writeIndex] = grid[x][y];
					grid[x][y] = null;
					grid[x][writeIndex].gridX = x;
					grid[x][writeIndex].gridY = writeIndex;
					var targetX = GRID_START_X + x * CELL_SIZE;
					var targetY = GRID_START_Y + writeIndex * CELL_SIZE;
					grid[x][writeIndex].animateToPosition(targetX, targetY);
					hasDropped = true;
				}
				writeIndex--;
			}
		}
		// Fill empty spaces with new candies
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] === null) {
				var candyType = Math.floor(Math.random() * CANDY_TYPES) + 1;
				var candy = new Candy(candyType);
				candy.gridX = x;
				candy.gridY = y;
				candy.x = GRID_START_X + x * CELL_SIZE;
				candy.y = GRID_START_Y - (GRID_SIZE - y) * CELL_SIZE;
				var targetY = GRID_START_Y + y * CELL_SIZE;
				candy.animateToPosition(candy.x, targetY);
				grid[x][y] = candy;
				game.addChild(candy);
				hasDropped = true;
			}
		}
	}
	if (hasDropped) {
		LK.setTimeout(function () {
			processMatches();
		}, 250);
	} else {
		checkGameState();
	}
}
function checkForMatches() {
	var allMatches = [];
	var specialCandyPositions = [];
	// Check all positions for matches
	for (var x = 0; x < GRID_SIZE; x++) {
		for (var y = 0; y < GRID_SIZE; y++) {
			if (grid[x][y] && !grid[x][y].isMatched) {
				var candy = grid[x][y];
				var matches = findMatchesAt(x, y, candy.candyType);
				// Check if this creates a 4-in-a-row for special candy
				if (matches.length >= 4) {
					// Check if it's horizontal or vertical match
					var isHorizontal = false;
					var isVertical = false;
					for (var i = 1; i < matches.length; i++) {
						if (matches[i].gridY === matches[0].gridY) isHorizontal = true;
						if (matches[i].gridX === matches[0].gridX) isVertical = true;
					}
					if (isHorizontal || isVertical) {
						specialCandyPositions.push({
							x: x,
							y: y,
							type: candy.candyType
						});
					}
				}
				// Add unique matches to allMatches
				for (var i = 0; i < matches.length; i++) {
					if (allMatches.indexOf(matches[i]) === -1) {
						allMatches.push(matches[i]);
					}
				}
			}
		}
	}
	if (allMatches.length > 0) {
		// Mark matches for destruction and update score
		for (var i = 0; i < allMatches.length; i++) {
			var candy = allMatches[i];
			if (!candy.isSpecial) {
				candy.markForDestroy();
				grid[candy.gridX][candy.gridY] = null;
				score += 10;
			}
		}
		// Create only one special candy from the first valid position
		if (specialCandyPositions.length > 0) {
			var pos = specialCandyPositions[0]; // Only use the first position
			if (grid[pos.x][pos.y] === null) {
				var specialCandy = new Candy(pos.type, true);
				specialCandy.setGridPosition(pos.x, pos.y);
				grid[pos.x][pos.y] = specialCandy;
				game.addChild(specialCandy);
				// Add sparkle effect to special candy
				tween(specialCandy, {
					scaleX: 1.2,
					scaleY: 1.2
				}, {
					duration: 200,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(specialCandy, {
							scaleX: 1,
							scaleY: 1
						}, {
							duration: 200,
							easing: tween.easeIn
						});
					}
				});
			}
		}
		scoreText.setText('Score: ' + score);
		LK.getSound('match').play();
		// Drop candies after delay
		LK.setTimeout(function () {
			dropCandies();
		}, 350);
	}
}
function findMatchesAt(x, y, candyType) {
	var matches = [];
	// Check horizontal matches (3+ in a row)
	var horizontalMatches = [grid[x][y]];
	// Check left
	var left = x - 1;
	while (left >= 0 && grid[left][y] && grid[left][y].candyType === candyType && !grid[left][y].isMatched) {
		horizontalMatches.unshift(grid[left][y]);
		left--;
	}
	// Check right
	var right = x + 1;
	while (right < GRID_SIZE && grid[right][y] && grid[right][y].candyType === candyType && !grid[right][y].isMatched) {
		horizontalMatches.push(grid[right][y]);
		right++;
	}
	if (horizontalMatches.length >= 3) {
		matches = matches.concat(horizontalMatches);
	}
	// Check vertical matches (3+ in a column)
	var verticalMatches = [grid[x][y]];
	// Check up
	var up = y - 1;
	while (up >= 0 && grid[x][up] && grid[x][up].candyType === candyType && !grid[x][up].isMatched) {
		verticalMatches.unshift(grid[x][up]);
		up--;
	}
	// Check down
	var down = y + 1;
	while (down < GRID_SIZE && grid[x][down] && grid[x][down].candyType === candyType && !grid[x][down].isMatched) {
		verticalMatches.push(grid[x][down]);
		down++;
	}
	if (verticalMatches.length >= 3) {
		// Remove duplicates if candy is part of both horizontal and vertical match
		for (var i = 0; i < verticalMatches.length; i++) {
			if (matches.indexOf(verticalMatches[i]) === -1) {
				matches.push(verticalMatches[i]);
			}
		}
	}
	return matches;
}
function checkGameState() {
	if (score >= targetScore) {
		gameState = 'won';
		LK.showYouWin();
	} else if (moves <= 0) {
		gameState = 'lost';
		LK.showGameOver();
	}
}
// Initialize the game
initializeGrid();
game.update = function () {
	// Game loop updates handled by individual object updates
};