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

/**** 
* Classes
****/ 
var GridCell = Container.expand(function (letter, row, col) {
	var self = Container.call(this);
	self.row = row;
	self.col = col;
	self.letter = letter;
	self.isFound = false;
	self.isSelected = false;
	var border = self.attachAsset('cellBorder', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var background = self.attachAsset('gridCell', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var selectedBg = self.attachAsset('selectedCell', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	var foundBg = self.attachAsset('foundCell', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0
	});
	var letterText = new Text2(letter, {
		size: 45,
		fill: 0x000000
	});
	letterText.anchor.set(0.5, 0.5);
	self.addChild(letterText);
	self.setSelected = function (selected) {
		self.isSelected = selected;
		selectedBg.alpha = selected ? 1 : 0;
	};
	self.setFound = function () {
		self.isFound = true;
		foundBg.alpha = 1;
		selectedBg.alpha = 0;
		letterText.style.fill = "#ffffff";
	};
	return self;
});
var WordListItem = Container.expand(function (word, index) {
	var self = Container.call(this);
	self.word = word;
	self.found = false;
	var wordText = new Text2(word.toUpperCase(), {
		size: 48,
		fill: 0x333333
	});
	wordText.anchor.set(0, 0.5);
	self.addChild(wordText);
	var strikethrough = LK.getAsset('cellBorder', {
		width: wordText.width + 20,
		height: 4,
		anchorX: 0,
		anchorY: 0.5,
		alpha: 0
	});
	strikethrough.x = -10;
	self.addChild(strikethrough);
	self.markFound = function () {
		self.found = true;
		wordText.style.fill = "#888888";
		strikethrough.alpha = 1;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf5f5f5
});

/**** 
* Game Code
****/ 
var GRID_SIZE = 12;
var CELL_SIZE = 60;
var GRID_START_X = 2048 / 2 - GRID_SIZE * CELL_SIZE / 2;
var GRID_START_Y = 300;
var words = ['CAT', 'DOG', 'BIRD', 'FISH', 'TREE', 'BOOK', 'GAME', 'WORD', 'HOUSE', 'LIGHT', 'WATER', 'MUSIC'];
var grid = [];
var gridCells = [];
var wordList = [];
var selectedCells = [];
var isDragging = false;
var foundWords = [];
// Generate random letter
function getRandomLetter() {
	return String.fromCharCode(65 + Math.floor(Math.random() * 26));
}
// Create empty grid
function createGrid() {
	for (var i = 0; i < GRID_SIZE; i++) {
		grid[i] = [];
		gridCells[i] = [];
		for (var j = 0; j < GRID_SIZE; j++) {
			grid[i][j] = getRandomLetter();
		}
	}
}
// Place word in grid
function placeWord(word, row, col, direction) {
	var directions = {
		horizontal: [0, 1],
		vertical: [1, 0],
		diagonal1: [1, 1],
		diagonal2: [1, -1],
		horizontal_r: [0, -1],
		vertical_r: [-1, 0],
		diagonal1_r: [-1, -1],
		diagonal2_r: [-1, 1]
	};
	var dir = directions[direction];
	for (var i = 0; i < word.length; i++) {
		var newRow = row + dir[0] * i;
		var newCol = col + dir[1] * i;
		if (newRow >= 0 && newRow < GRID_SIZE && newCol >= 0 && newCol < GRID_SIZE) {
			grid[newRow][newCol] = word[i];
		}
	}
}
// Check if word can be placed
function canPlaceWord(word, row, col, direction) {
	var directions = {
		horizontal: [0, 1],
		vertical: [1, 0],
		diagonal1: [1, 1],
		diagonal2: [1, -1],
		horizontal_r: [0, -1],
		vertical_r: [-1, 0],
		diagonal1_r: [-1, -1],
		diagonal2_r: [-1, 1]
	};
	var dir = directions[direction];
	for (var i = 0; i < word.length; i++) {
		var newRow = row + dir[0] * i;
		var newCol = col + dir[1] * i;
		if (newRow < 0 || newRow >= GRID_SIZE || newCol < 0 || newCol >= GRID_SIZE) {
			return false;
		}
	}
	return true;
}
// Place all words in grid
function placeWords() {
	var directions = ['horizontal', 'vertical', 'diagonal1', 'diagonal2', 'horizontal_r', 'vertical_r', 'diagonal1_r', 'diagonal2_r'];
	for (var w = 0; w < words.length; w++) {
		var word = words[w];
		var placed = false;
		var attempts = 0;
		while (!placed && attempts < 100) {
			var row = Math.floor(Math.random() * GRID_SIZE);
			var col = Math.floor(Math.random() * GRID_SIZE);
			var direction = directions[Math.floor(Math.random() * directions.length)];
			if (canPlaceWord(word, row, col, direction)) {
				placeWord(word, row, col, direction);
				placed = true;
			}
			attempts++;
		}
	}
}
// Create visual grid
function createVisualGrid() {
	for (var i = 0; i < GRID_SIZE; i++) {
		for (var j = 0; j < GRID_SIZE; j++) {
			var cell = new GridCell(grid[i][j], i, j);
			cell.x = GRID_START_X + j * CELL_SIZE;
			cell.y = GRID_START_Y + i * CELL_SIZE;
			gridCells[i][j] = cell;
			game.addChild(cell);
		}
	}
}
// Create word list
function createWordList() {
	var startY = GRID_START_Y;
	var startX = GRID_START_X + GRID_SIZE * CELL_SIZE + 100;
	for (var i = 0; i < words.length; i++) {
		var wordItem = new WordListItem(words[i], i);
		wordItem.x = startX;
		wordItem.y = startY + i * 50;
		wordList.push(wordItem);
		game.addChild(wordItem);
	}
}
// Get cell at position
function getCellAtPosition(x, y) {
	for (var i = 0; i < GRID_SIZE; i++) {
		for (var j = 0; j < GRID_SIZE; j++) {
			var cell = gridCells[i][j];
			var bounds = {
				left: cell.x - CELL_SIZE / 2,
				right: cell.x + CELL_SIZE / 2,
				top: cell.y - CELL_SIZE / 2,
				bottom: cell.y + CELL_SIZE / 2
			};
			if (x >= bounds.left && x <= bounds.right && y >= bounds.top && y <= bounds.bottom) {
				return cell;
			}
		}
	}
	return null;
}
// Clear selection
function clearSelection() {
	for (var i = 0; i < selectedCells.length; i++) {
		if (!selectedCells[i].isFound) {
			selectedCells[i].setSelected(false);
		}
	}
	selectedCells = [];
}
// Get selected word
function getSelectedWord() {
	var word = "";
	for (var i = 0; i < selectedCells.length; i++) {
		word += selectedCells[i].letter;
	}
	return word;
}
// Check if word is valid
function isValidWord(word) {
	for (var i = 0; i < words.length; i++) {
		if (words[i] === word && foundWords.indexOf(word) === -1) {
			return true;
		}
	}
	return false;
}
// Mark word as found
function markWordFound(word) {
	foundWords.push(word);
	// Mark cells as found
	for (var i = 0; i < selectedCells.length; i++) {
		selectedCells[i].setFound();
	}
	// Mark word in list as found
	for (var i = 0; i < wordList.length; i++) {
		if (wordList[i].word === word) {
			wordList[i].markFound();
			break;
		}
	}
	LK.getSound('wordFound').play();
	LK.setScore(LK.getScore() + word.length * 10);
	// Check win condition
	if (foundWords.length === words.length) {
		LK.setTimeout(function () {
			LK.showYouWin();
		}, 1000);
	}
}
// Check if cells form a line
function isValidSelection(cells) {
	if (cells.length < 2) return true;
	var deltaRow = cells[1].row - cells[0].row;
	var deltaCol = cells[1].col - cells[0].col;
	// Normalize direction
	if (deltaRow !== 0) deltaRow = deltaRow > 0 ? 1 : -1;
	if (deltaCol !== 0) deltaCol = deltaCol > 0 ? 1 : -1;
	for (var i = 2; i < cells.length; i++) {
		var currentDeltaRow = cells[i].row - cells[i - 1].row;
		var currentDeltaCol = cells[i].col - cells[i - 1].col;
		if (currentDeltaRow !== 0) currentDeltaRow = currentDeltaRow > 0 ? 1 : -1;
		if (currentDeltaCol !== 0) currentDeltaCol = currentDeltaCol > 0 ? 1 : -1;
		if (currentDeltaRow !== deltaRow || currentDeltaCol !== deltaCol) {
			return false;
		}
	}
	return true;
}
// Initialize game
createGrid();
placeWords();
createVisualGrid();
createWordList();
// Create title
var titleText = new Text2('WORD QUEST', {
	size: 80,
	fill: 0x2196F3
});
titleText.anchor.set(0.5, 0.5);
titleText.x = 2048 / 2;
titleText.y = 150;
game.addChild(titleText);
// Create score display
var scoreText = new Text2('Score: 0', {
	size: 48,
	fill: 0x333333
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
scoreText.y = 60;
game.down = function (x, y, obj) {
	var cell = getCellAtPosition(x, y);
	if (cell && !cell.isFound) {
		isDragging = true;
		clearSelection();
		selectedCells.push(cell);
		cell.setSelected(true);
		LK.getSound('selectLetter').play();
	}
};
game.move = function (x, y, obj) {
	if (isDragging) {
		var cell = getCellAtPosition(x, y);
		if (cell && !cell.isFound && selectedCells.indexOf(cell) === -1) {
			var tempSelection = selectedCells.slice();
			tempSelection.push(cell);
			if (isValidSelection(tempSelection)) {
				selectedCells.push(cell);
				cell.setSelected(true);
				LK.getSound('selectLetter').play();
			}
		}
	}
};
game.up = function (x, y, obj) {
	if (isDragging) {
		isDragging = false;
		if (selectedCells.length > 1) {
			var selectedWord = getSelectedWord();
			var reverseWord = selectedWord.split('').reverse().join('');
			if (isValidWord(selectedWord)) {
				markWordFound(selectedWord);
			} else if (isValidWord(reverseWord)) {
				markWordFound(reverseWord);
			} else {
				clearSelection();
			}
		} else {
			clearSelection();
		}
	}
};
game.update = function () {
	scoreText.setText('Score: ' + LK.getScore());
};