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

/**** 
* Classes
****/ 
var ChessPiece = Container.expand(function (type, color, row, col) {
	var self = Container.call(this);
	self.pieceType = type;
	self.color = color;
	self.row = row;
	self.col = col;
	self.hasMoved = false;
	var assetName = color + type.charAt(0).toUpperCase() + type.slice(1);
	self.graphic = self.attachAsset(assetName, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.setPosition = function (row, col) {
		self.row = row;
		self.col = col;
		if (playerPerspective === 'black') {
			// Flip the board for black player perspective
			self.x = boardOffsetX + (7 - col) * 200 + 100;
			self.y = boardOffsetY + (7 - row) * 200 + 100;
		} else {
			self.x = boardOffsetX + col * 200 + 100;
			self.y = boardOffsetY + row * 200 + 100;
		}
	};
	self.getValidMoves = function () {
		var moves = [];
		if (self.pieceType === 'pawn') {
			// Pawns move diagonally forward, capture straight forward
			var direction = self.color === 'white' ? -1 : 1;
			var newRow = self.row + direction;
			// Diagonal movement (normal pawn movement)
			if (newRow >= 0 && newRow < 8) {
				if (self.col > 0 && !board[newRow][self.col - 1]) {
					moves.push({
						row: newRow,
						col: self.col - 1
					});
				}
				if (self.col < 7 && !board[newRow][self.col + 1]) {
					moves.push({
						row: newRow,
						col: self.col + 1
					});
				}
			}
			// Capture straight forward
			if (newRow >= 0 && newRow < 8) {
				var piece = board[newRow][self.col];
				if (piece && piece.color !== self.color) {
					moves.push({
						row: newRow,
						col: self.col
					});
				}
			}
			// Initial two-square diagonal move
			if (!self.hasMoved) {
				newRow = self.row + direction * 2;
				if (newRow >= 0 && newRow < 8) {
					if (self.col > 1 && !board[newRow][self.col - 2]) {
						moves.push({
							row: newRow,
							col: self.col - 2
						});
					}
					if (self.col < 6 && !board[newRow][self.col + 2]) {
						moves.push({
							row: newRow,
							col: self.col + 2
						});
					}
				}
			}
		} else if (self.pieceType === 'rook') {
			// Rooks move diagonally (like bishops)
			var directions = [[-1, -1], [-1, 1], [1, -1], [1, 1]];
			for (var d = 0; d < directions.length; d++) {
				var dir = directions[d];
				for (var i = 1; i < 8; i++) {
					var newRow = self.row + dir[0] * i;
					var newCol = self.col + dir[1] * i;
					if (newRow < 0 || newRow >= 8 || newCol < 0 || newCol >= 8) break;
					var piece = board[newRow][newCol];
					if (!piece) {
						moves.push({
							row: newRow,
							col: newCol
						});
					} else {
						if (piece.color !== self.color) {
							moves.push({
								row: newRow,
								col: newCol
							});
						}
						break;
					}
				}
			}
		} else if (self.pieceType === 'bishop') {
			// Bishops move like knights (L-shaped)
			var knightMoves = [[-2, -1], [-2, 1], [-1, -2], [-1, 2], [1, -2], [1, 2], [2, -1], [2, 1]];
			for (var k = 0; k < knightMoves.length; k++) {
				var move = knightMoves[k];
				var newRow = self.row + move[0];
				var newCol = self.col + move[1];
				if (newRow >= 0 && newRow < 8 && newCol >= 0 && newCol < 8) {
					var piece = board[newRow][newCol];
					if (!piece || piece.color !== self.color) {
						moves.push({
							row: newRow,
							col: newCol
						});
					}
				}
			}
		} else if (self.pieceType === 'knight') {
			// Knights move straight (like rooks)
			var directions = [[0, 1], [0, -1], [1, 0], [-1, 0]];
			for (var d = 0; d < directions.length; d++) {
				var dir = directions[d];
				for (var i = 1; i < 8; i++) {
					var newRow = self.row + dir[0] * i;
					var newCol = self.col + dir[1] * i;
					if (newRow < 0 || newRow >= 8 || newCol < 0 || newCol >= 8) break;
					var piece = board[newRow][newCol];
					if (!piece) {
						moves.push({
							row: newRow,
							col: newCol
						});
					} else {
						if (piece.color !== self.color) {
							moves.push({
								row: newRow,
								col: newCol
							});
						}
						break;
					}
				}
			}
		} else if (self.pieceType === 'queen') {
			// Queen moves both diagonally and straight
			var directions = [[-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 1], [1, -1], [1, 0], [1, 1]];
			for (var d = 0; d < directions.length; d++) {
				var dir = directions[d];
				for (var i = 1; i < 8; i++) {
					var newRow = self.row + dir[0] * i;
					var newCol = self.col + dir[1] * i;
					if (newRow < 0 || newRow >= 8 || newCol < 0 || newCol >= 8) break;
					var piece = board[newRow][newCol];
					if (!piece) {
						moves.push({
							row: newRow,
							col: newCol
						});
					} else {
						if (piece.color !== self.color) {
							moves.push({
								row: newRow,
								col: newCol
							});
						}
						break;
					}
				}
			}
		} else if (self.pieceType === 'king') {
			// King moves one square in any direction
			var directions = [[-1, -1], [-1, 0], [-1, 1], [0, -1], [0, 1], [1, -1], [1, 0], [1, 1]];
			for (var d = 0; d < directions.length; d++) {
				var dir = directions[d];
				var newRow = self.row + dir[0];
				var newCol = self.col + dir[1];
				if (newRow >= 0 && newRow < 8 && newCol >= 0 && newCol < 8) {
					var piece = board[newRow][newCol];
					if (!piece || piece.color !== self.color) {
						moves.push({
							row: newRow,
							col: newCol
						});
					}
				}
			}
		}
		return moves;
	};
	return self;
});
var ChessSquare = Container.expand(function (row, col) {
	var self = Container.call(this);
	self.row = row;
	self.col = col;
	self.isLight = (row + col) % 2 === 0;
	self.background = self.attachAsset(self.isLight ? 'lightSquare' : 'darkSquare', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.highlight = self.attachAsset('highlight', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.validMoveIndicator = self.attachAsset('validMove', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.selectedIndicator = self.attachAsset('selectedPiece', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	self.setHighlight = function (show) {
		self.highlight.alpha = show ? 0.3 : 0;
	};
	self.setValidMove = function (show) {
		self.validMoveIndicator.alpha = show ? 0.5 : 0;
	};
	self.setSelected = function (show) {
		self.selectedIndicator.alpha = show ? 0.4 : 0;
	};
	self.down = function (x, y, obj) {
		handleSquareClick(self.row, self.col);
	};
	return self;
});
var PromotionDialog = Container.expand(function (color, onSelect) {
	var self = Container.call(this);
	self.color = color;
	self.onSelect = onSelect;
	// Background
	self.background = self.attachAsset('promotionDialog', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Title text
	self.titleText = new Text2('Choose promotion piece:', {
		size: 60,
		fill: 0xFFFFFF
	});
	self.titleText.anchor.set(0.5, 0.5);
	self.titleText.x = 0;
	self.titleText.y = -120;
	self.addChild(self.titleText);
	// Promotion pieces
	var pieceTypes = ['queen', 'rook', 'bishop', 'knight'];
	var buttons = [];
	for (var i = 0; i < pieceTypes.length; i++) {
		var pieceType = pieceTypes[i];
		var button = new Container();
		// Button background
		var buttonBg = button.attachAsset('promotionButton', {
			anchorX: 0.5,
			anchorY: 0.5
		});
		// Piece image
		var assetName = color + pieceType.charAt(0).toUpperCase() + pieceType.slice(1);
		var pieceImage = button.attachAsset(assetName, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		button.x = (i - 1.5) * 180;
		button.y = 0;
		button.pieceType = pieceType;
		// Create closure to capture the correct pieceType for each button
		button.down = function (capturedPieceType) {
			return function (x, y, obj) {
				self.onSelect(capturedPieceType);
			};
		}(pieceType);
		buttons.push(button);
		self.addChild(button);
	}
	// Position dialog at center of screen
	self.x = 1024;
	self.y = 1366;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x8B4513
});

/**** 
* Game Code
****/ 
// White pieces
// Black pieces
var boardOffsetX = 224;
var boardOffsetY = 566;
var board = [];
var squares = [];
var pieces = [];
var selectedPiece = null;
var validMoves = [];
var currentPlayer = 'white';
var gameOver = false;
var promotionDialog = null;
var pendingPromotion = null;
var playerPerspective = 'white'; // 'white' or 'black' - determines board orientation
var gameMode = 'menu'; // 'menu', 'computer', 'online'
var isPlayerTurn = true;
var aiColor = 'black';
var mainMenu = null;
var whiteTimeRemaining = 600; // 10 minutes in seconds
var blackTimeRemaining = 600; // 10 minutes in seconds
var gameTimer = null;
var whiteTimerText = null;
var blackTimerText = null;
var lastTimerUpdate = 0;
function showHowToPlay() {
	var howToPlayContainer = new Container();
	game.addChild(howToPlayContainer);
	// Background
	var background = howToPlayContainer.attachAsset('promotionDialog', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.5,
		scaleY: 3.0,
		tint: 0xFFA500
	});
	howToPlayContainer.x = 1024;
	howToPlayContainer.y = 1366;
	// Title
	var titleText = new Text2('How to Play Chess', {
		size: 80,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 0;
	titleText.y = -500;
	howToPlayContainer.addChild(titleText);
	// Piece explanations
	var pieceExplanations = [{
		piece: 'Pawn',
		description: 'Moves diagonally forward, captures straight forward'
	}, {
		piece: 'Rook',
		description: 'Moves diagonally in all directions'
	}, {
		piece: 'Bishop',
		description: 'Moves in L-shape (like a knight)'
	}, {
		piece: 'Knight',
		description: 'Moves straight (horizontal/vertical)'
	}, {
		piece: 'Queen',
		description: 'Moves in all directions (diagonal + straight)'
	}, {
		piece: 'King',
		description: 'Moves one square in any direction'
	}];
	for (var i = 0; i < pieceExplanations.length; i++) {
		var explanation = pieceExplanations[i];
		// Piece name
		var pieceNameText = new Text2(explanation.piece + ':', {
			size: 50,
			fill: 0xFFD700
		});
		pieceNameText.anchor.set(0, 0.5);
		pieceNameText.x = -400;
		pieceNameText.y = -350 + i * 120;
		howToPlayContainer.addChild(pieceNameText);
		// Piece description
		var descriptionText = new Text2(explanation.description, {
			size: 40,
			fill: 0xFFFFFF
		});
		descriptionText.anchor.set(0, 0.5);
		descriptionText.x = -400;
		descriptionText.y = -320 + i * 120;
		howToPlayContainer.addChild(descriptionText);
	}
	// Additional rules
	var rulesText = new Text2('Special Rules:', {
		size: 50,
		fill: 0xFFD700
	});
	rulesText.anchor.set(0, 0.5);
	rulesText.x = -400;
	rulesText.y = 400;
	howToPlayContainer.addChild(rulesText);
	var promotionText = new Text2('• Pawns promote to Queen when reaching end', {
		size: 40,
		fill: 0xFFFFFF
	});
	promotionText.anchor.set(0, 0.5);
	promotionText.x = -400;
	promotionText.y = 450;
	howToPlayContainer.addChild(promotionText);
	var checkText = new Text2('• Protect your King from check/checkmate', {
		size: 40,
		fill: 0xFFFFFF
	});
	checkText.anchor.set(0, 0.5);
	checkText.x = -400;
	checkText.y = 500;
	howToPlayContainer.addChild(checkText);
	// Back button
	var backButton = new Container();
	var backBg = backButton.attachAsset('promotionButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 0.8
	});
	var backText = new Text2('Back', {
		size: 60,
		fill: 0xFFFFFF
	});
	backText.anchor.set(0.5, 0.5);
	backButton.addChild(backText);
	backButton.x = 0;
	backButton.y = 700;
	backButton.down = function (x, y, obj) {
		howToPlayContainer.destroy();
	};
	howToPlayContainer.addChild(backButton);
}
function createMainMenu() {
	mainMenu = new Container();
	game.addChild(mainMenu);
	// Title
	var titleText = new Text2('FakeChess', {
		size: 120,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 1024;
	titleText.y = 600;
	mainMenu.addChild(titleText);
	// Computer button
	var computerButton = new Container();
	var computerBg = computerButton.attachAsset('promotionDialog', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.4
	});
	var computerText = new Text2('Computer', {
		size: 80,
		fill: 0xFFFFFF
	});
	computerText.anchor.set(0.5, 0.5);
	computerButton.addChild(computerText);
	computerButton.x = 1024;
	computerButton.y = 900;
	computerButton.down = function (x, y, obj) {
		startComputerGame();
	};
	mainMenu.addChild(computerButton);
	// Online button
	var onlineButton = new Container();
	var onlineBg = onlineButton.attachAsset('promotionDialog', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.4
	});
	var onlineText = new Text2('Online', {
		size: 80,
		fill: 0xFFFFFF
	});
	onlineText.anchor.set(0.5, 0.5);
	onlineButton.addChild(onlineText);
	onlineButton.x = 1024;
	onlineButton.y = 1200;
	onlineButton.down = function (x, y, obj) {
		startOnlineGame();
	};
	mainMenu.addChild(onlineButton);
	// How to play button
	var howToPlayButton = new Container();
	var howToPlayBg = howToPlayButton.attachAsset('promotionDialog', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.4
	});
	var howToPlayText = new Text2('How to play?', {
		size: 80,
		fill: 0xFFFFFF
	});
	howToPlayText.anchor.set(0.5, 0.5);
	howToPlayButton.addChild(howToPlayText);
	howToPlayButton.x = 1024;
	howToPlayButton.y = 1500;
	howToPlayButton.down = function (x, y, obj) {
		showHowToPlay();
	};
	mainMenu.addChild(howToPlayButton);
}
function startComputerGame() {
	gameMode = 'computer';
	// Randomly assign player color
	var playerColor = Math.random() < 0.5 ? 'white' : 'black';
	playerPerspective = playerColor;
	aiColor = playerColor === 'white' ? 'black' : 'white';
	isPlayerTurn = currentPlayer === playerColor;
	// Hide menu and initialize game
	mainMenu.destroy();
	mainMenu = null;
	initializeBoard();
	initializePieces();
	addCoordinateLabels();
	createTurnIndicator();
	// Play game start sound
	LK.getSound('gameStart').play();
	// If AI should start (AI is white), make first move
	if (aiColor === 'white') {
		LK.setTimeout(function () {
			makeAIMove();
		}, 800);
	}
}
function startOnlineGame() {
	gameMode = 'online';
	// Reset timers
	whiteTimeRemaining = 600;
	blackTimeRemaining = 600;
	playerPerspective = 'white';
	mainMenu.destroy();
	mainMenu = null;
	initializeBoard();
	initializePieces();
	addCoordinateLabels();
	createTurnIndicator();
	createTimerDisplay();
	startGameTimer();
	// Play game start sound
	LK.getSound('gameStart').play();
}
function initializeBoard() {
	// Initialize board
	for (var row = 0; row < 8; row++) {
		board[row] = [];
		squares[row] = [];
		for (var col = 0; col < 8; col++) {
			board[row][col] = null;
			var square = new ChessSquare(row, col);
			if (playerPerspective === 'black') {
				// Flip the board for black player perspective
				square.x = boardOffsetX + (7 - col) * 200 + 100;
				square.y = boardOffsetY + (7 - row) * 200 + 100;
			} else {
				square.x = boardOffsetX + col * 200 + 100;
				square.y = boardOffsetY + row * 200 + 100;
			}
			squares[row][col] = square;
			game.addChild(square);
		}
	}
}
// Show main menu on startup
createMainMenu();
// Initialize pieces
function initializePieces() {
	// White pieces
	var whitePieces = [{
		type: 'rook',
		positions: [[7, 0], [7, 7]]
	}, {
		type: 'knight',
		positions: [[7, 1], [7, 6]]
	}, {
		type: 'bishop',
		positions: [[7, 2], [7, 5]]
	}, {
		type: 'queen',
		positions: [[7, 3]]
	}, {
		type: 'king',
		positions: [[7, 4]]
	}, {
		type: 'pawn',
		positions: [[6, 0], [6, 1], [6, 2], [6, 3], [6, 4], [6, 5], [6, 6], [6, 7]]
	}];
	// Black pieces
	var blackPieces = [{
		type: 'rook',
		positions: [[0, 0], [0, 7]]
	}, {
		type: 'knight',
		positions: [[0, 1], [0, 6]]
	}, {
		type: 'bishop',
		positions: [[0, 2], [0, 5]]
	}, {
		type: 'queen',
		positions: [[0, 3]]
	}, {
		type: 'king',
		positions: [[0, 4]]
	}, {
		type: 'pawn',
		positions: [[1, 0], [1, 1], [1, 2], [1, 3], [1, 4], [1, 5], [1, 6], [1, 7]]
	}];
	// Create white pieces
	for (var i = 0; i < whitePieces.length; i++) {
		var pieceData = whitePieces[i];
		for (var j = 0; j < pieceData.positions.length; j++) {
			var pos = pieceData.positions[j];
			var piece = new ChessPiece(pieceData.type, 'white', pos[0], pos[1]);
			piece.setPosition(pos[0], pos[1]);
			board[pos[0]][pos[1]] = piece;
			pieces.push(piece);
			game.addChild(piece);
		}
	}
	// Create black pieces
	for (var i = 0; i < blackPieces.length; i++) {
		var pieceData = blackPieces[i];
		for (var j = 0; j < pieceData.positions.length; j++) {
			var pos = pieceData.positions[j];
			var piece = new ChessPiece(pieceData.type, 'black', pos[0], pos[1]);
			piece.setPosition(pos[0], pos[1]);
			board[pos[0]][pos[1]] = piece;
			pieces.push(piece);
			game.addChild(piece);
		}
	}
}
function clearHighlights() {
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			squares[row][col].setHighlight(false);
			squares[row][col].setValidMove(false);
			squares[row][col].setSelected(false);
		}
	}
}
function showValidMoves(piece) {
	var allMoves = piece.getValidMoves();
	validMoves = [];
	// Filter out moves that would leave the king in check
	for (var i = 0; i < allMoves.length; i++) {
		var move = allMoves[i];
		if (isValidMove(piece, move.row, move.col)) {
			validMoves.push(move);
			squares[move.row][move.col].setValidMove(true);
		}
	}
}
function handleSquareClick(row, col) {
	if (gameOver) return;
	if (gameMode === 'computer' && !isPlayerTurn) return; // Don't allow moves during AI turn
	if (gameMode === 'menu') return; // Don't allow moves in menu
	var clickedPiece = board[row][col];
	if (selectedPiece) {
		// Check if clicked square is a valid move
		var validMove = false;
		for (var i = 0; i < validMoves.length; i++) {
			if (validMoves[i].row === row && validMoves[i].col === col) {
				validMove = true;
				break;
			}
		}
		if (validMove) {
			// Make the move
			movePiece(selectedPiece, row, col);
			selectedPiece = null;
			clearHighlights();
			validMoves = [];
			// Only switch players and check game over if not promoting
			if (!pendingPromotion) {
				// Switch players
				currentPlayer = currentPlayer === 'white' ? 'black' : 'white';
				if (gameMode === 'computer') {
					isPlayerTurn = currentPlayer !== aiColor;
				}
				// Update timer display for online mode
				if (gameMode === 'online') {
					updateTimerDisplay();
					lastTimerUpdate = Date.now();
				}
				// Check for game over conditions
				checkGameOver();
				if (gameMode === 'computer' && !isPlayerTurn) {
					// AI turn - make move after short delay
					LK.setTimeout(function () {
						makeAIMove();
					}, 800);
				}
			}
		} else if (clickedPiece && clickedPiece.color === currentPlayer) {
			// Select new piece
			clearHighlights();
			selectedPiece = clickedPiece;
			squares[row][col].setSelected(true);
			showValidMoves(selectedPiece);
		} else {
			// Deselect
			selectedPiece = null;
			clearHighlights();
			validMoves = [];
		}
	} else if (clickedPiece && clickedPiece.color === currentPlayer) {
		// Select piece
		selectedPiece = clickedPiece;
		squares[row][col].setSelected(true);
		showValidMoves(selectedPiece);
	}
}
function movePiece(piece, toRow, toCol) {
	var capturedPiece = board[toRow][toCol];
	// Remove piece from old position
	board[piece.row][piece.col] = null;
	// Place piece in new position
	board[toRow][toCol] = piece;
	piece.setPosition(toRow, toCol);
	piece.hasMoved = true;
	// Handle captured piece
	if (capturedPiece) {
		capturedPiece.destroy();
		for (var i = pieces.length - 1; i >= 0; i--) {
			if (pieces[i] === capturedPiece) {
				pieces.splice(i, 1);
				break;
			}
		}
		LK.getSound('capture').play();
	} else {
		LK.getSound('move').play();
	}
	// Animate piece movement
	tween(piece, {
		x: piece.x,
		y: piece.y
	}, {
		duration: 300
	});
	// Check for pawn promotion
	if (piece.pieceType === 'pawn') {
		var promotionRow = piece.color === 'white' ? 0 : 7;
		if (toRow === promotionRow) {
			// Check if it's AI's turn in computer mode
			if (gameMode === 'computer' && piece.color === aiColor) {
				// AI automatically promotes to queen
				handleAIPromotion(piece, toRow, toCol, 'queen');
				return; // Don't switch players yet
			} else {
				// Store promotion details for player
				pendingPromotion = {
					piece: piece,
					row: toRow,
					col: toCol
				};
				// Show promotion dialog
				showPromotionDialog(piece.color);
				return; // Don't switch players yet
			}
		}
	}
}
function isKingInCheck(kingColor) {
	// Find the king
	var king = null;
	for (var i = 0; i < pieces.length; i++) {
		var piece = pieces[i];
		if (piece.pieceType === 'king' && piece.color === kingColor) {
			king = piece;
			break;
		}
	}
	if (!king) return false;
	// Check if any enemy piece can attack the king
	for (var i = 0; i < pieces.length; i++) {
		var piece = pieces[i];
		if (piece.color !== kingColor) {
			var moves = piece.getValidMoves();
			for (var j = 0; j < moves.length; j++) {
				if (moves[j].row === king.row && moves[j].col === king.col) {
					return true;
				}
			}
		}
	}
	return false;
}
function isValidMove(piece, toRow, toCol) {
	// Save current state
	var originalRow = piece.row;
	var originalCol = piece.col;
	var capturedPiece = board[toRow][toCol];
	// Temporarily remove captured piece from pieces array for accurate check detection
	var capturedPieceIndex = -1;
	if (capturedPiece) {
		for (var i = 0; i < pieces.length; i++) {
			if (pieces[i] === capturedPiece) {
				capturedPieceIndex = i;
				pieces.splice(i, 1);
				break;
			}
		}
	}
	// Simulate the move
	board[originalRow][originalCol] = null;
	board[toRow][toCol] = piece;
	piece.row = toRow;
	piece.col = toCol;
	// Check if this move leaves the king in check
	var kingInCheck = isKingInCheck(piece.color);
	// Restore original state
	board[originalRow][originalCol] = piece;
	board[toRow][toCol] = capturedPiece;
	piece.row = originalRow;
	piece.col = originalCol;
	// Restore captured piece to pieces array
	if (capturedPiece && capturedPieceIndex !== -1) {
		pieces.splice(capturedPieceIndex, 0, capturedPiece);
	}
	// Debug: Log when moves are being blocked
	if (kingInCheck && capturedPiece) {
		console.log("Move blocked: " + piece.pieceType + " cannot capture " + capturedPiece.pieceType + " - king still in check");
	}
	return !kingInCheck;
}
function getValidMovesForPlayer(playerColor) {
	var allMoves = [];
	for (var i = 0; i < pieces.length; i++) {
		var piece = pieces[i];
		if (piece.color === playerColor) {
			var moves = piece.getValidMoves();
			for (var j = 0; j < moves.length; j++) {
				if (isValidMove(piece, moves[j].row, moves[j].col)) {
					allMoves.push({
						piece: piece,
						row: moves[j].row,
						col: moves[j].col
					});
				}
			}
		}
	}
	return allMoves;
}
function makeAIMove() {
	if (gameMode !== 'computer' || currentPlayer !== aiColor || gameOver) return;
	var validMoves = getValidMovesForPlayer(aiColor);
	if (validMoves.length === 0) return;
	// Evaluate and score all possible moves
	var bestMoves = [];
	var bestScore = -1000;
	for (var i = 0; i < validMoves.length; i++) {
		var move = validMoves[i];
		var score = evaluateMove(move);
		if (score > bestScore) {
			bestScore = score;
			bestMoves = [move];
		} else if (score === bestScore) {
			bestMoves.push(move);
		}
	}
	// Pick randomly from the best moves
	var selectedMove = bestMoves[Math.floor(Math.random() * bestMoves.length)];
	movePiece(selectedMove.piece, selectedMove.row, selectedMove.col);
	// Clear selection and highlights
	selectedPiece = null;
	clearHighlights();
	// Switch players if not promoting
	if (!pendingPromotion) {
		currentPlayer = currentPlayer === 'white' ? 'black' : 'white';
		isPlayerTurn = currentPlayer !== aiColor;
		checkGameOver();
	}
}
function evaluateMove(move) {
	var score = 0;
	var targetPiece = board[move.row][move.col];
	var movingPiece = move.piece;
	// Prioritize captures - assign values to different pieces
	if (targetPiece) {
		var pieceValues = {
			'pawn': 10,
			'knight': 30,
			'bishop': 30,
			'rook': 50,
			'queen': 90,
			'king': 1000
		};
		score += pieceValues[targetPiece.pieceType] || 0;
	}
	// Bonus for moving towards center
	var centerDistance = Math.abs(move.row - 3.5) + Math.abs(move.col - 3.5);
	score += (7 - centerDistance) * 2;
	// Bonus for advancing pawns
	if (movingPiece.pieceType === 'pawn') {
		if (aiColor === 'white') {
			score += (7 - move.row) * 3; // White pawns advance by decreasing row
		} else {
			score += move.row * 3; // Black pawns advance by increasing row
		}
	}
	// Bonus for developing pieces early
	if (!movingPiece.hasMoved) {
		if (movingPiece.pieceType === 'knight' || movingPiece.pieceType === 'bishop') {
			score += 15;
		}
	}
	// Small penalty for moving the same piece multiple times early
	if (movingPiece.hasMoved && movingPiece.pieceType !== 'pawn') {
		score -= 2;
	}
	// Bonus for protecting valuable pieces
	var protectedPieces = 0;
	var attackingMoves = movingPiece.getValidMoves();
	for (var i = 0; i < attackingMoves.length; i++) {
		var attackMove = attackingMoves[i];
		var protectedPiece = board[attackMove.row][attackMove.col];
		if (protectedPiece && protectedPiece.color === aiColor) {
			protectedPieces++;
		}
	}
	score += protectedPieces * 5;
	return score;
}
function checkGameOver() {
	// Find kings
	var whiteKing = null;
	var blackKing = null;
	for (var i = 0; i < pieces.length; i++) {
		var piece = pieces[i];
		if (piece.pieceType === 'king') {
			if (piece.color === 'white') {
				whiteKing = piece;
			} else {
				blackKing = piece;
			}
		}
	}
	// Check if either king is captured (shouldn't happen in proper chess)
	if (!whiteKing) {
		gameOver = true;
		LK.getSound('gameOver').play();
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 1000);
		return;
	} else if (!blackKing) {
		gameOver = true;
		LK.getSound('gameOver').play();
		LK.setTimeout(function () {
			LK.showYouWin();
		}, 1000);
		return;
	}
	// Check for check and checkmate
	var currentPlayerInCheck = isKingInCheck(currentPlayer);
	var validMoves = getValidMovesForPlayer(currentPlayer);
	if (currentPlayerInCheck) {
		if (validMoves.length === 0) {
			// Checkmate - the current player is in check and has no valid moves
			gameOver = true;
			LK.getSound('checkmate').play();
			// In computer mode, determine win/loss based on player perspective
			if (gameMode === 'computer') {
				if (currentPlayer === playerPerspective) {
					// Player is checkmated - AI wins
					LK.setTimeout(function () {
						LK.showGameOver();
					}, 1000);
				} else {
					// AI is checkmated - Player wins
					LK.setTimeout(function () {
						LK.showYouWin();
					}, 1000);
				}
			} else {
				// Online mode - show result based on color that won
				var winner = currentPlayer === 'white' ? 'black' : 'white'; // The winner is the opposite of who is checkmated
				LK.setTimeout(function () {
					if (winner === 'black') {
						// Black won
						var blackWonText = new Text2('Black Won!', {
							size: 120,
							fill: 0xFFFFFF
						});
						blackWonText.anchor.set(0.5, 0.5);
						blackWonText.x = 1024;
						blackWonText.y = 1366;
						game.addChild(blackWonText);
						LK.setTimeout(function () {
							LK.showGameOver();
						}, 2000);
					} else {
						// White won
						var whiteWonText = new Text2('White Won!', {
							size: 120,
							fill: 0xFFFFFF
						});
						whiteWonText.anchor.set(0.5, 0.5);
						whiteWonText.x = 1024;
						whiteWonText.y = 1366;
						game.addChild(whiteWonText);
						LK.setTimeout(function () {
							LK.showYouWin();
						}, 2000);
					}
				}, 1000);
			}
		} else {
			// Check warning - player is in check but has moves
			LK.effects.flashScreen(0xff0000, 500);
			LK.getSound('check').play();
		}
	} else if (validMoves.length === 0) {
		// Stalemate - no check but no valid moves
		gameOver = true;
		LK.getSound('gameOver').play();
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 1000);
	}
}
function showPromotionDialog(color) {
	if (promotionDialog) {
		promotionDialog.destroy();
	}
	promotionDialog = new PromotionDialog(color, function (selectedPiece) {
		handlePromotion(selectedPiece);
	});
	game.addChild(promotionDialog);
}
function handlePromotion(newPieceType) {
	if (!pendingPromotion) return;
	var oldPiece = pendingPromotion.piece;
	var row = pendingPromotion.row;
	var col = pendingPromotion.col;
	// Remove old pawn
	oldPiece.destroy();
	for (var i = pieces.length - 1; i >= 0; i--) {
		if (pieces[i] === oldPiece) {
			pieces.splice(i, 1);
			break;
		}
	}
	board[row][col] = null;
	// Create new piece
	var newPiece = new ChessPiece(newPieceType, oldPiece.color, row, col);
	newPiece.setPosition(row, col);
	newPiece.hasMoved = true;
	board[row][col] = newPiece;
	pieces.push(newPiece);
	game.addChild(newPiece);
	// Clean up
	promotionDialog.destroy();
	promotionDialog = null;
	pendingPromotion = null;
	// Switch players
	currentPlayer = currentPlayer === 'white' ? 'black' : 'white';
	// Update timer display for online mode
	if (gameMode === 'online') {
		updateTimerDisplay();
		lastTimerUpdate = Date.now();
	}
	// Check for game over conditions
	checkGameOver();
}
function handleAIPromotion(oldPiece, row, col, newPieceType) {
	// Remove old pawn
	oldPiece.destroy();
	for (var i = pieces.length - 1; i >= 0; i--) {
		if (pieces[i] === oldPiece) {
			pieces.splice(i, 1);
			break;
		}
	}
	board[row][col] = null;
	// Create new piece
	var newPiece = new ChessPiece(newPieceType, oldPiece.color, row, col);
	newPiece.setPosition(row, col);
	newPiece.hasMoved = true;
	board[row][col] = newPiece;
	pieces.push(newPiece);
	game.addChild(newPiece);
	// Switch players
	currentPlayer = currentPlayer === 'white' ? 'black' : 'white';
	if (gameMode === 'computer') {
		isPlayerTurn = currentPlayer !== aiColor;
	}
	// Check for game over conditions
	checkGameOver();
	// Continue game flow after promotion - ensure AI can continue playing
	if (gameMode === 'computer' && currentPlayer === aiColor && !gameOver) {
		// If it's AI's turn after promotion, schedule another AI move
		LK.setTimeout(function () {
			makeAIMove();
		}, 800);
	}
}
function setPlayerPerspective(perspective) {
	playerPerspective = perspective;
	// Clear existing board and pieces
	for (var i = pieces.length - 1; i >= 0; i--) {
		pieces[i].destroy();
	}
	pieces = [];
	for (var row = 0; row < 8; row++) {
		for (var col = 0; col < 8; col++) {
			board[row][col] = null;
			squares[row][col].destroy();
		}
	}
	// Clear coordinate labels
	for (var i = game.children.length - 1; i >= 0; i--) {
		var child = game.children[i];
		if (child instanceof Text2 && child !== turnText) {
			child.destroy();
		}
	}
	// Reinitialize board
	for (var row = 0; row < 8; row++) {
		board[row] = [];
		squares[row] = [];
		for (var col = 0; col < 8; col++) {
			board[row][col] = null;
			var square = new ChessSquare(row, col);
			if (playerPerspective === 'black') {
				square.x = boardOffsetX + (7 - col) * 200 + 100;
				square.y = boardOffsetY + (7 - row) * 200 + 100;
			} else {
				square.x = boardOffsetX + col * 200 + 100;
				square.y = boardOffsetY + row * 200 + 100;
			}
			squares[row][col] = square;
			game.addChild(square);
		}
	}
	// Reinitialize pieces and coordinates
	initializePieces();
	addCoordinateLabels();
}
function addCoordinateLabels() {
	// Add numbers 1-8 on the left side (always from white's perspective)
	for (var i = 0; i < 8; i++) {
		var rankNumber, rankY;
		if (playerPerspective === 'black') {
			rankNumber = i + 1;
			rankY = boardOffsetY + i * 200 + 100;
		} else {
			rankNumber = 8 - i;
			rankY = boardOffsetY + i * 200 + 100;
		}
		var rankText = new Text2(rankNumber.toString(), {
			size: 40,
			fill: 0xFFFFFF
		});
		rankText.anchor.set(0.5, 0.5);
		rankText.x = boardOffsetX - 60;
		rankText.y = rankY;
		game.addChild(rankText);
	}
	// Add letters a-h (always from white's perspective)
	var files = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
	for (var i = 0; i < 8; i++) {
		var fileLabel, fileX;
		if (playerPerspective === 'black') {
			fileLabel = files[7 - i];
			fileX = boardOffsetX + i * 200 + 100;
		} else {
			fileLabel = files[i];
			fileX = boardOffsetX + i * 200 + 100;
		}
		var fileText = new Text2(fileLabel, {
			size: 40,
			fill: 0xFFFFFF
		});
		fileText.anchor.set(0.5, 0.5);
		fileText.x = fileX;
		fileText.y = boardOffsetY + 8 * 200 + 60;
		game.addChild(fileText);
	}
}
function createTurnIndicator() {
	// Add turn indicator
	turnText = new Text2('White to move', {
		size: 80,
		fill: 0xFFFFFF
	});
	turnText.anchor.set(0.5, 0);
	turnText.x = 1024;
	turnText.y = 200;
	game.addChild(turnText);
}
function createTimerDisplay() {
	if (gameMode !== 'online') return;
	// White timer
	whiteTimerText = new Text2(formatTime(whiteTimeRemaining), {
		size: 60,
		fill: 0xFFFFFF
	});
	whiteTimerText.anchor.set(0.5, 0.5);
	whiteTimerText.x = boardOffsetX + 1600 - 80;
	whiteTimerText.y = boardOffsetY + 1600 + 120;
	game.addChild(whiteTimerText);
	// Black timer
	blackTimerText = new Text2(formatTime(blackTimeRemaining), {
		size: 60,
		fill: 0xFFFFFF
	});
	blackTimerText.anchor.set(0.5, 0.5);
	blackTimerText.x = boardOffsetX + 1600 - 80;
	blackTimerText.y = boardOffsetY - 60;
	game.addChild(blackTimerText);
}
function formatTime(seconds) {
	var minutes = Math.floor(seconds / 60);
	var remainingSeconds = seconds % 60;
	return minutes + ':' + (remainingSeconds < 10 ? '0' : '') + remainingSeconds;
}
function startGameTimer() {
	if (gameMode !== 'online') return;
	lastTimerUpdate = Date.now();
	gameTimer = LK.setInterval(function () {
		var currentTime = Date.now();
		var deltaTime = Math.floor((currentTime - lastTimerUpdate) / 1000);
		if (deltaTime >= 1) {
			if (currentPlayer === 'white') {
				whiteTimeRemaining -= deltaTime;
				if (whiteTimeRemaining <= 0) {
					whiteTimeRemaining = 0;
					handleTimeOut('white');
					return;
				}
			} else {
				blackTimeRemaining -= deltaTime;
				if (blackTimeRemaining <= 0) {
					blackTimeRemaining = 0;
					handleTimeOut('black');
					return;
				}
			}
			updateTimerDisplay();
			lastTimerUpdate = currentTime;
		}
	}, 100);
}
function updateTimerDisplay() {
	if (gameMode !== 'online') return;
	if (whiteTimerText) {
		whiteTimerText.setText(formatTime(whiteTimeRemaining));
		// Highlight current player's timer
		if (currentPlayer === 'white') {
			whiteTimerText.tint = 0x00ff00;
			blackTimerText.tint = 0xffffff;
		} else {
			whiteTimerText.tint = 0xffffff;
			blackTimerText.tint = 0x00ff00;
		}
	}
	if (blackTimerText) {
		blackTimerText.setText(formatTime(blackTimeRemaining));
	}
}
function handleTimeOut(timedOutPlayer) {
	if (gameTimer) {
		LK.clearInterval(gameTimer);
		gameTimer = null;
	}
	gameOver = true;
	LK.getSound('gameOver').play();
	LK.setTimeout(function () {
		if (timedOutPlayer === 'white') {
			LK.showGameOver();
		} else {
			LK.showYouWin();
		}
	}, 1000);
}
function stopGameTimer() {
	if (gameTimer) {
		LK.clearInterval(gameTimer);
		gameTimer = null;
	}
}
// Game starts with main menu - no immediate initialization
game.update = function () {
	// Only update turn indicator if not in menu and turnText exists
	if (gameMode !== 'menu' && turnText && !gameOver) {
		var checkText = '';
		var currentPlayerInCheck = isKingInCheck(currentPlayer);
		var validMoves = getValidMovesForPlayer(currentPlayer);
		if (currentPlayerInCheck) {
			if (validMoves.length === 0) {
				checkText = ' - CHECKMATE!';
			} else {
				checkText = ' - CHECK!';
			}
		}
		var turnDisplay = '';
		if (gameMode === 'computer') {
			if (currentPlayer === playerPerspective) {
				turnDisplay = 'Your turn';
			} else {
				turnDisplay = 'AI thinking...';
			}
		} else if (gameMode === 'online') {
			turnDisplay = currentPlayer === 'white' ? 'White to move' : 'Black to move';
			// Add time pressure warning
			if (currentPlayer === 'white' && whiteTimeRemaining <= 60) {
				turnDisplay += ' (LOW TIME!)';
			} else if (currentPlayer === 'black' && blackTimeRemaining <= 60) {
				turnDisplay += ' (LOW TIME!)';
			}
		} else {
			turnDisplay = currentPlayer === 'white' ? 'White to move' : 'Black to move';
		}
		turnText.setText(turnDisplay + checkText);
	}
};