/**** 
* Classes
****/ 
// Candy class
var Candy = Container.expand(function () {
	var self = Container.call(this);
	// Properties
	self.type = null; // 'red', 'yellow', etc.
	self.special = null; // null, 'striped', 'bomb'
	self.row = 0;
	self.col = 0;
	self.isMoving = false;
	// Asset
	var asset = null;
	// Set candy type and special
	self.setType = function (type, special) {
		self.type = type;
		self.special = special || null;
		if (asset) {
			asset.destroy();
		}
		var assetId;
		if (special === 'bomb') {
			assetId = 'candy_bomb';
		} else {
			assetId = 'candy_' + (special ? special : type);
		}
		asset = self.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
	};
	// Animate to (x, y)
	self.moveTo = function (x, y, cb) {
		self.isMoving = true;
		self.x = x;
		self.y = y;
		self.isMoving = false;
		if (cb) {
			cb();
		}
	};
	// Pop animation
	self.pop = function (cb) {
		self.destroy();
		if (cb) {
			cb();
		}
	};
	// Reset visual
	self.resetVisual = function () {
		self.scaleX = 1;
		self.scaleY = 1;
		self.alpha = 1;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	// Set background to solid gray
	backgroundColor: 0x888888
});

/**** 
* Game Code
****/ 
// --- Constants ---
// 6 candy types, each a colored ellipse
// Special candies
// Simple sound for match
var GRID_SIZE = 8;
var CELL_SIZE = 220; // px, fits 8x8 in 2048x2048
var GRID_OFFSET_X = Math.floor((2048 - GRID_SIZE * CELL_SIZE) / 2);
var GRID_OFFSET_Y = 320; // leave space for GUI at top
var CANDY_TYPES = ['red', 'yellow', 'green', 'blue', 'orange', 'purple'];
var SPECIALS = ['striped', 'bomb'];
// --- State ---
var grid = []; // 2D array [row][col] of Candy or null
var selectedCandy = null;
var swappingCandy = null;
var isAnimating = false;
var movesLeft = 40;
var targetScore = 20000;
var score = 0;
var comboMultiplier = 1;
var isProcessing = false;
var currentLevel = 1;
// --- GUI ---
var scoreTxt = new Text2('Score: 0', {
	size: 90,
	fill: "#fff"
});
scoreTxt.anchor.set(1, 0);
// Move scoreTxt to the right side of the top GUI bar
scoreTxt.x = LK.gui.top.width - 120;
LK.gui.top.addChild(scoreTxt);
var movesTxt = new Text2('Moves: 550', {
	size: 90,
	fill: "#fff"
});
movesTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(movesTxt);
var targetTxt = new Text2('Target: 20000', {
	size: 70,
	fill: "#fff"
});
targetTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(targetTxt);
targetTxt.y = 100;
var levelTxt = new Text2('Level: 1', {
	size: 70,
	fill: "#fff"
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 200;
// --- Helper Functions ---
function getCandyPos(row, col) {
	return {
		x: GRID_OFFSET_X + col * CELL_SIZE + CELL_SIZE / 2,
		y: GRID_OFFSET_Y + row * CELL_SIZE + CELL_SIZE / 2
	};
}
function randomCandyType() {
	return CANDY_TYPES[Math.floor(Math.random() * CANDY_TYPES.length)];
}
// Returns true if (r1,c1) and (r2,c2) are adjacent
function isAdjacent(r1, c1, r2, c2) {
	return Math.abs(r1 - r2) + Math.abs(c1 - c2) === 1;
}
// --- Board Setup ---
function createBoard() {
	// Remove previous grid lines if any
	if (typeof gridLines !== "undefined" && gridLines) {
		gridLines.destroy();
		gridLines = null;
	}
	// Draw grid lines (black) for ızgıra görünümü
	gridLines = new Container();
	var lineWidth = 12; // px, thick black lines
	var gridW = GRID_SIZE * CELL_SIZE;
	var gridH = GRID_SIZE * CELL_SIZE;
	// Draw vertical lines
	for (var c = 0; c <= GRID_SIZE; c++) {
		var x = GRID_OFFSET_X + c * CELL_SIZE;
		var line = LK.getAsset('candy_bomb', {
			width: lineWidth,
			height: gridH + lineWidth,
			color: 0x000000,
			anchorX: 0.5,
			anchorY: 0
		});
		line.x = x;
		line.y = GRID_OFFSET_Y - lineWidth / 2;
		gridLines.addChild(line);
	}
	// Draw horizontal lines
	for (var r = 0; r <= GRID_SIZE; r++) {
		var y = GRID_OFFSET_Y + r * CELL_SIZE;
		var line = LK.getAsset('candy_bomb', {
			width: gridW + lineWidth,
			height: lineWidth,
			color: 0x000000,
			anchorX: 0,
			anchorY: 0.5
		});
		line.x = GRID_OFFSET_X - lineWidth / 2;
		line.y = y;
		gridLines.addChild(line);
	}
	game.addChild(gridLines);
	// Clear previous
	for (var r = 0; r < GRID_SIZE; r++) {
		grid[r] = [];
		for (var c = 0; c < GRID_SIZE; c++) {
			var candy = new Candy();
			var type = randomCandyType();
			candy.setType(type);
			candy.row = r;
			candy.col = c;
			// Place each candy in a grid layout
			var pos = getCandyPos(r, c);
			candy.x = pos.x;
			candy.y = pos.y;
			candy.resetVisual();
			grid[r][c] = candy;
			game.addChild(candy);
		}
	}
	// Remove any initial matches
	removeInitialMatches();
}
function removeInitialMatches() {
	var changed = false;
	for (var r = 0; r < GRID_SIZE; r++) {
		for (var c = 0; c < GRID_SIZE; c++) {
			var type = grid[r][c].type;
			// Check left 2
			if (c >= 2 && grid[r][c - 1].type === type && grid[r][c - 2].type === type) {
				do {
					type = randomCandyType();
				} while (type === grid[r][c - 1].type || type === grid[r][c - 2].type);
				grid[r][c].setType(type);
				changed = true;
			}
			// Check up 2
			if (r >= 2 && grid[r - 1][c].type === type && grid[r - 2][c].type === type) {
				do {
					type = randomCandyType();
				} while (type === grid[r - 1][c].type || type === grid[r - 2][c].type);
				grid[r][c].setType(type);
				changed = true;
			}
		}
	}
	if (changed) {
		removeInitialMatches();
	}
}
// --- Input Handling ---
// Convert (x,y) to (row,col) or null if outside grid
function posToCell(x, y) {
	var col = Math.floor((x - GRID_OFFSET_X) / CELL_SIZE);
	var row = Math.floor((y - GRID_OFFSET_Y) / CELL_SIZE);
	if (row < 0 || row >= GRID_SIZE || col < 0 || col >= GRID_SIZE) {
		return null;
	}
	return {
		row: row,
		col: col
	};
}
// Highlight selected candy
function highlightCandy(candy) {
	if (!candy) {
		return;
	}
	candy.scaleX = 1.2;
	candy.scaleY = 1.2;
}
function unhighlightCandy(candy) {
	if (!candy) {
		return;
	}
	candy.scaleX = 1;
	candy.scaleY = 1;
}
// Touch/drag logic
var dragStartCell = null;
var dragCurrentCell = null;
game.down = function (x, y, obj) {
	if (isAnimating || isProcessing || movesLeft <= 0) {
		return;
	}
	var cell = posToCell(x, y);
	if (!cell) {
		return;
	}
	var candy = grid[cell.row][cell.col];
	if (!candy) {
		return;
	}
	selectedCandy = candy;
	dragStartCell = cell;
	highlightCandy(candy);
};
game.move = function (x, y, obj) {
	if (!selectedCandy || isAnimating || isProcessing) {
		return;
	}
	var cell = posToCell(x, y);
	if (!cell) {
		return;
	}
	dragCurrentCell = cell;
	// If drag to adjacent cell, swap
	if (isAdjacent(dragStartCell.row, dragStartCell.col, cell.row, cell.col)) {
		var targetCandy = grid[cell.row][cell.col];
		if (!targetCandy) {
			return;
		}
		swapCandies(selectedCandy, targetCandy, true);
		unhighlightCandy(selectedCandy);
		selectedCandy = null;
		dragStartCell = null;
		dragCurrentCell = null;
	}
};
game.up = function (x, y, obj) {
	if (selectedCandy) {
		unhighlightCandy(selectedCandy);
		selectedCandy = null;
		dragStartCell = null;
		dragCurrentCell = null;
	}
};
// --- Swap and Match Logic ---
function swapCandies(c1, c2, isPlayerMove) {
	if (isAnimating || isProcessing) {
		return;
	}
	isAnimating = true;
	// Swap in grid
	var r1 = c1.row,
		c1c = c1.col,
		r2 = c2.row,
		c2c = c2.col;
	grid[r1][c1c] = c2;
	grid[r2][c2c] = c1;
	// Swap row/col
	var tmpRow = c1.row,
		tmpCol = c1.col;
	c1.row = c2.row;
	c1.col = c2.col;
	c2.row = tmpRow;
	c2.col = tmpCol;
	// Animate
	var pos1 = getCandyPos(c1.row, c1.col);
	var pos2 = getCandyPos(c2.row, c2.col);
	var done = 0;
	c1.moveTo(pos1.x, pos1.y, function () {
		done++;
		if (done === 2) {
			afterSwap();
		}
	});
	c2.moveTo(pos2.x, pos2.y, function () {
		done++;
		if (done === 2) {
			afterSwap();
		}
	});
	function afterSwap() {
		// Check for matches
		var matches = findAllMatches();
		if (matches.length > 0) {
			if (isPlayerMove) {
				movesLeft--;
				updateGUI();
			}
			processMatches(matches);
		} else {
			// No match: swap back if player move
			if (isPlayerMove) {
				var finish = function finish() {
					isAnimating = false;
				};
				// Swap back
				grid[r1][c1c] = c1;
				grid[r2][c2c] = c2;
				c1.row = r1;
				c1.col = c1c;
				c2.row = r2;
				c2.col = c2c;
				var pos1b = getCandyPos(c1.row, c1.col);
				var pos2b = getCandyPos(c2.row, c2.col);
				var done2 = 0;
				c1.moveTo(pos1b.x, pos1b.y, function () {
					done2++;
					if (done2 === 2) {
						finish();
					}
				});
				c2.moveTo(pos2b.x, pos2b.y, function () {
					done2++;
					if (done2 === 2) {
						finish();
					}
				});
			} else {
				isAnimating = false;
			}
		}
	}
}
// Find all matches on board. Returns array of arrays of candies.
function findAllMatches() {
	var matches = [];
	var visited = [];
	for (var r = 0; r < GRID_SIZE; r++) {
		visited[r] = [];
		for (var c = 0; c < GRID_SIZE; c++) {
			visited[r][c] = false;
		}
	}
	// Horizontal
	for (var r = 0; r < GRID_SIZE; r++) {
		var count = 1;
		for (var c = 1; c < GRID_SIZE; c++) {
			var prev = grid[r][c - 1],
				curr = grid[r][c];
			if (curr && prev && curr.type === prev.type && !curr.special && !prev.special) {
				count++;
			} else {
				if (count >= 3) {
					var arr = [];
					for (var k = 0; k < count; k++) {
						if (!visited[r][c - 1 - k]) {
							arr.push(grid[r][c - 1 - k]);
							visited[r][c - 1 - k] = true;
						}
					}
					if (arr.length) {
						matches.push(arr);
					}
				}
				count = 1;
			}
		}
		if (count >= 3) {
			var arr = [];
			for (var k = 0; k < count; k++) {
				if (!visited[r][GRID_SIZE - 1 - k]) {
					arr.push(grid[r][GRID_SIZE - 1 - k]);
					visited[r][GRID_SIZE - 1 - k] = true;
				}
			}
			if (arr.length) {
				matches.push(arr);
			}
		}
	}
	// Vertical
	for (var c = 0; c < GRID_SIZE; c++) {
		var count = 1;
		for (var r = 1; r < GRID_SIZE; r++) {
			var prev = grid[r - 1][c],
				curr = grid[r][c];
			if (curr && prev && curr.type === prev.type && !curr.special && !prev.special) {
				count++;
			} else {
				if (count >= 3) {
					var arr = [];
					for (var k = 0; k < count; k++) {
						if (!visited[r - 1 - k][c]) {
							arr.push(grid[r - 1 - k][c]);
							visited[r - 1 - k][c] = true;
						}
					}
					if (arr.length) {
						matches.push(arr);
					}
				}
				count = 1;
			}
		}
		if (count >= 3) {
			var arr = [];
			for (var k = 0; k < count; k++) {
				if (!visited[GRID_SIZE - 1 - k][c]) {
					arr.push(grid[GRID_SIZE - 1 - k][c]);
					visited[GRID_SIZE - 1 - k][c] = true;
				}
			}
			if (arr.length) {
				matches.push(arr);
			}
		}
	}
	return matches;
}
// --- Match Processing ---
function processMatches(matches) {
	isProcessing = true;
	// Play sound
	LK.getSound('match').play();
	// Score
	var points = 0;
	for (var i = 0; i < matches.length; i++) {
		points += matches[i].length * 100 * comboMultiplier;
	}
	score += points;
	updateGUI();
	// Special candy creation (only for 4+ matches)
	for (var i = 0; i < matches.length; i++) {
		if (matches[i].length === 4) {
			// Make one of them striped
			var c = matches[i][Math.floor(Math.random() * 4)];
			c.setType(c.type, 'striped');
		}
		// No bomb creation for 5+ matches
	}
	// Remove matched candies (except special ones just created)
	var toRemove = [];
	for (var i = 0; i < matches.length; i++) {
		for (var j = 0; j < matches[i].length; j++) {
			var c = matches[i][j];
			if (!c.special) {
				toRemove.push(c);
			}
		}
	}
	// Remove from grid
	for (var i = 0; i < toRemove.length; i++) {
		var c = toRemove[i];
		grid[c.row][c.col] = null;
		c.pop();
	}
	// After animation, drop candies and refill
	LK.setTimeout(function () {
		dropCandies(function () {
			refillCandies(function () {
				// Check for new matches (cascade)
				var newMatches = findAllMatches();
				if (newMatches.length > 0) {
					comboMultiplier++;
					processMatches(newMatches);
				} else {
					comboMultiplier = 1;
					isProcessing = false;
					isAnimating = false;
					checkEndConditions();
				}
			});
		});
	}, 220);
}
// Drop candies to fill empty spaces
function dropCandies(cb) {
	var moved = false;
	for (var c = 0; c < GRID_SIZE; c++) {
		for (var r = GRID_SIZE - 1; r >= 0; r--) {
			if (!grid[r][c]) {
				// Find first non-null above
				for (var k = r - 1; k >= 0; k--) {
					if (grid[k][c]) {
						// Move down
						var candy = grid[k][c];
						grid[r][c] = candy;
						grid[k][c] = null;
						candy.row = r;
						candy.col = c;
						var pos = getCandyPos(r, c);
						candy.moveTo(pos.x, pos.y);
						moved = true;
						break;
					}
				}
			}
		}
	}
	// Wait for animation
	LK.setTimeout(function () {
		if (moved) {
			dropCandies(cb);
		} else {
			cb();
		}
	}, 200);
}
// Fill empty spaces at top with new candies
function refillCandies(cb) {
	var created = false;
	for (var c = 0; c < GRID_SIZE; c++) {
		for (var r = 0; r < GRID_SIZE; r++) {
			if (!grid[r][c]) {
				var candy = new Candy();
				var type = randomCandyType();
				candy.setType(type);
				candy.row = r;
				candy.col = c;
				var pos = getCandyPos(r, c);
				// Start above board
				candy.x = pos.x;
				candy.y = pos.y - 400;
				candy.resetVisual();
				grid[r][c] = candy;
				game.addChild(candy);
				candy.moveTo(pos.x, pos.y);
				created = true;
			}
		}
	}
	LK.setTimeout(cb, created ? 200 : 0);
}
// --- GUI Update ---
function updateGUI() {
	scoreTxt.setText('Score: ' + score);
	movesTxt.setText('Moves: ' + movesLeft);
	targetTxt.setText('Target: ' + targetScore);
	if (typeof levelTxt !== "undefined") {
		levelTxt.setText('Level: ' + currentLevel);
	}
}
// --- End Conditions ---
function checkEndConditions() {
	if (score >= targetScore) {
		// Advance to next level
		currentLevel++;
		score = 0;
		movesLeft = 40;
		targetScore = 20000;
		comboMultiplier = 1;
		updateGUI();
		// Remove all candies from board
		for (var r = 0; r < GRID_SIZE; r++) {
			for (var c = 0; c < GRID_SIZE; c++) {
				if (grid[r][c]) {
					grid[r][c].destroy();
					grid[r][c] = null;
				}
			}
		}
		createBoard();
	} else if (movesLeft <= 0) {
		LK.showGameOver();
	}
}
// --- Game Start ---
function startGame() {
	currentLevel = 1;
	score = 0;
	movesLeft = 40;
	targetScore = 20000;
	comboMultiplier = 1;
	updateGUI();
	createBoard();
}
startGame();
// Play calm background music (loops by default)
LK.playMusic('calm_bg_music');
// --- Game Tick ---
game.update = function () {
	// No per-frame logic needed for MVP
};