function hsvToRgb(h, s, v) {
	var i = Math.floor(h * 6), f = h * 6 - i, p = v * (1 - s), q = v * (1 - f * s), t = v * (1 - (1 - f) * s), mod = i % 6, r = [v, q, p, p, t, v][mod], g = [t, v, v, q, p, p][mod], b = [p, p, t, v, v, q][mod];
	return (r * 255 << 16) + (g * 255 << 8) + b * 255;
}
var Tile = Container.expand(function (type) {
	var self = Container.call(this);
	var tileGraphics = self.createAsset('tile', 'Grid Tile', .5, .5);
	tileGraphics.alpha = 0.5;
	self.targetX = 0;
	self.targetY = 0;
	self.isMoving = false;
	self.totalTypes = 3;
	self.type = type || Math.floor(Math.random() * self.totalTypes);
	var hue = self.type / self.totalTypes;
	var color = hsvToRgb(hue, 0.5, 1);
	tileGraphics.tint = color;
	self.cells = [];
	var cellWidth = 0;
	var cellHeight = 0;
	self.structure = [];
	if (self.type === 0) {
		self.structure = [[1, 1]];
		var cell1 = new Cell();
		var cell2 = new Cell();
		cellWidth = cell1.width;
		cellHeight = cell1.height;
		self.cells.push(cell1);
		self.cells.push(cell2);
	} else if (self.type === 1) {
		self.structure = [[1], [1]];
		var cell1 = new Cell();
		var cell2 = new Cell();
		cellWidth = cell1.width;
		cellHeight = cell1.height;
		self.cells.push(cell1);
		self.cells.push(cell2);
	} else if (self.type === 2) {
		self.structure = [[1]];
		var cell1 = new Cell();
		cellWidth = cell1.width;
		cellHeight = cell1.height;
		self.cells.push(cell1);
	}
	self.cells.forEach(function (cell, index) {
		if (self.type === 0) {
			cell.x = index === 0 ? self.x - cellWidth / 2 : self.x + cellWidth / 2;
			cell.y = self.y;
		} else if (self.type === 1) {
			cell.x = self.x;
			cell.y = index === 0 ? self.y - cellHeight / 2 : self.y + cellHeight / 2;
		}
		self.addChild(cell);
	});
	self.move = function (x, y, instant) {
		self.targetX = x;
		self.targetY = y;
		if (instant) {
			self.x = x;
			self.y = y;
		}
	};
	self.tick = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 1) {
			self.x += dx * 0.15;
			self.y += dy * 0.15;
			self.isMoving = true;
		} else {
			self.x = self.targetX;
			self.y = self.targetY;
			self.isMoving = false;
		}
	};
});
var GridBackgroundCell = Container.expand(function () {
	var self = Container.call(this);
	var bgCellGraphics = self.createAsset('gridCell', 'Background Grid Cell', 0.5, 0.5);
	bgCellGraphics.alpha = 0.5;
	self.setAlphaAndTint = function (alpha, tint) {
		bgCellGraphics.alpha = alpha;
		bgCellGraphics.tint = tint;
	};
});
var Cell = Container.expand(function (type) {
	var self = Container.call(this);
	var cellGraphics = self.createAsset('cell', 'Grid Cell', .5, .5);
	self.targetX = 0;
	self.targetY = 0;
	self.isMoving = false;
	self.totalTypes = 5;
	self.type = type || Math.floor(Math.random() * self.totalTypes);
	var hue = self.type / self.totalTypes;
	var color = hsvToRgb(hue, 1, 1);
	cellGraphics.tint = color;
	self.move = function (x, y, instant) {
		self.targetX = x;
		self.targetY = y;
		if (instant) {
			self.x = x;
			self.y = y;
		}
	};
	self.tick = function () {
		var acceleration = 1;
		self.speedX = self.speedX || 0;
		self.speedY = self.speedY || 0;
		var threshold = 1;
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		if (Math.abs(dx) < threshold && Math.abs(dy) < threshold) {
			self.x = self.targetX;
			self.y = self.targetY;
			self.isMoving = false;
			self.speedX = 0;
			self.speedY = 0;
		} else {
			if (dx !== 0) {
				self.speedX += dx > 0 ? acceleration : -acceleration;
			}
			if (dy !== 0) {
				self.speedY += dy > 0 ? acceleration : -acceleration;
			}
			var nextX = self.x + self.speedX;
			var nextY = self.y + self.speedY;
			if (self.speedX > 0 && nextX > self.targetX || self.speedX < 0 && nextX < self.targetX) {
				nextX = self.targetX;
				self.speedX = 0;
			}
			if (self.speedY > 0 && nextY > self.targetY || self.speedY < 0 && nextY < self.targetY) {
				nextY = self.targetY;
				self.speedY = 0;
			}
			self.x = nextX;
			self.y = nextY;
			self.isMoving = self.x !== self.targetX || self.y !== self.targetY;
		}
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.findCellColRow = function (cell) {
		for (var col = 0; col < gridWidth; col++) {
			for (var row = 0; row < gridHeight; row++) {
				if (grid[col][row] === cell) {
					return {
						col: col,
						row: row
					};
				}
			}
		}
		return null;
	};
	self.canPlaceAnyTile = function () {
		for (var i = 0; i < bottomTiles.length; i++) {
			var tile = bottomTiles[i];
			for (var col = 0; col < gridWidth; col++) {
				for (var row = 0; row < gridHeight; row++) {
					if (self.canPlaceTile(tile, col, row)) {
						return true;
					}
				}
			}
		}
		return false;
	};
	self.canPlaceTile = function (tile, gridX, gridY) {
		for (var row = 0; row < tile.structure.length; row++) {
			for (var col = 0; col < tile.structure[row].length; col++) {
				if (tile.structure[row][col] === 1) {
					var targetCol = gridX + col;
					var targetRow = gridY + row;
					if (targetCol < 0 || targetCol >= gridWidth || targetRow < 0 || targetRow >= gridHeight) {
						return false;
					}
					if (grid[targetCol][targetRow]) {
						return false;
					}
				}
			}
		}
		return true;
	};
	self.toTest = [];
	this.getOverlappingCells = function (tile) {
		var overlappingCells = [];
		var shouldReturnEmpty = false;
		tile.cells.forEach(function (cell) {
			var cellBounds = cell.getBounds();
			for (var i = 0; i < gridWidth; i++) {
				for (var j = 0; j < gridHeight; j++) {
					var bgCell = bgGrid[i][j];
					var bgCellBounds = bgCell.getBounds();
					if (cellBounds.contains(bgCellBounds.x + bgCellBounds.width / 2, bgCellBounds.y + bgCellBounds.height / 2)) {
						if (grid[i][j]) {
							shouldReturnEmpty = true;
							break;
						}
						overlappingCells.push(bgCell);
					}
				}
				if (shouldReturnEmpty) {
					break;
				}
			}
		});
		if (shouldReturnEmpty) {
			return [];
		}
		return overlappingCells;
	};
	self.resetBackgroundGridCells = function () {
		for (var i = 0; i < gridWidth; i++) {
			for (var j = 0; j < gridHeight; j++) {
				var bgCell = bgGrid[i][j];
				bgCell.setAlphaAndTint(0.5, 0xFFFFFF);
			}
		}
	};
	var gridWidth = 5;
	var gridHeight = 5;
	var gridSpacing = 2;
	var tempTile = new Tile();
	var tileWidth = tempTile.width;
	var tileHeight = tempTile.height;
	tempTile.destroy();
	var tempCell = new Cell();
	var cellWidth = tempCell.width;
	var cellHeight = tempCell.height;
	tempCell.destroy();
	var gridContainer = new Container();
	self.addChild(gridContainer);
	var totalGridWidth = gridWidth * (cellWidth + gridSpacing) - gridSpacing;
	var totalGridHeight = gridHeight * (cellHeight + gridSpacing) - gridSpacing;
	gridContainer.x = (2048 - totalGridWidth) / 2 + cellWidth / 2;
	gridContainer.y = (2732 - totalGridHeight) / 2 + cellHeight / 2 - 200;
	self.calculateTargetPosition = function (col, row) {
		return {
			x: col * (cellWidth + gridSpacing),
			y: row * (cellHeight + gridSpacing)
		};
	};
	self.findConnectedNeighbors = function (cell, connectedNeighbors) {
		connectedNeighbors = connectedNeighbors || [];
		if (!cell) return [];
		var cellType = cell.type;
		var cellColRow = self.findCellColRow(cell);
		if (cellColRow) {
			var directions = [[-1, 0], [1, 0], [0, -1], [0, 1]];
			directions.forEach(function (dir) {
				var newRow = cellColRow.row + dir[0];
				var newCol = cellColRow.col + dir[1];
				if (newRow >= 0 && newRow < gridHeight && newCol >= 0 && newCol < gridWidth) {
					var neighborCell = grid[newCol][newRow];
					if (neighborCell && neighborCell.type === cellType && connectedNeighbors.indexOf(neighborCell) === -1) {
						connectedNeighbors.push(neighborCell);
						self.findConnectedNeighbors(neighborCell, connectedNeighbors);
					}
				}
			});
		}
		return connectedNeighbors;
	};
	self.findBgCellColRow = function (bgCell) {
		for (var col = 0; col < gridWidth; col++) {
			for (var row = 0; row < gridHeight; row++) {
				if (bgGrid[col][row] === bgCell) {
					return {
						col: col,
						row: row
					};
				}
			}
		}
		return null;
	};
	self.deleteCell = function (cell) {
		var colRow = self.findCellColRow(cell);
		if (colRow) {
			grid[colRow.col][colRow.row] = null;
			cell.destroy();
		}
	};
	var grid = Array(5).fill().map(() => Array(5).fill(null));
	var bgGrid = Array(5).fill().map(() => Array(5).fill(null));
	for (var i = 0; i < gridWidth; i++) {
		for (var j = 0; j < gridHeight; j++) {
			var bgCell = new GridBackgroundCell();
			var targetPos = self.calculateTargetPosition(i, j);
			bgCell.x = targetPos.x;
			bgCell.y = targetPos.y;
			bgGrid[i][j] = bgCell;
			gridContainer.addChild(bgCell);
		}
	}
	for (var k = 0; k < 2; k++) {
		var randomCol = Math.floor(Math.random() * gridWidth);
		var randomRow = Math.floor(Math.random() * gridHeight);
		while (grid[randomCol][randomRow]) {
			randomCol = Math.floor(Math.random() * gridWidth);
			randomRow = Math.floor(Math.random() * gridHeight);
		}
		var cell = new Cell();
		var targetPos = self.calculateTargetPosition(randomCol, randomRow);
		cell.move(targetPos.x, targetPos.y, true);
		grid[randomCol][randomRow] = cell;
		gridContainer.addChild(cell);
	}
	stage.on('move', function (obj) {
		if (draggedTile) {
			var pos = obj.event.getLocalPosition(self);
			draggedTile.x = pos.x;
			draggedTile.y = pos.y;
			self.highlightOverlappingCells(draggedTile);
		}
	});
	self.highlightOverlappingCells = function (tile) {
		self.resetBackgroundGridCells();
		var overlappingCells = self.getOverlappingCells(tile);
		if (overlappingCells.length !== tile.cells.length) return;
		overlappingCells.forEach(function (bgCell) {
			bgCell.setAlphaAndTint(1, 0x00FF00);
		});
	};
	LK.on('tick', function () {
		for (var i = 0; i < gridWidth; i++) {
			for (var j = 0; j < gridHeight; j++) {
				if (grid[i][j]) grid[i][j].tick();
			}
		}
		for (var i = 0; i < bottomTiles.length; i++) {
			if (bottomTiles[i] !== draggedTile) {
				bottomTiles[i].tick();
			}
		}
		var isAnyTileMoving = grid.some(row => row.some(cell => cell && cell.isMoving)) || bottomTiles.some(tile => tile.isMoving);
		if (!isAnyTileMoving) {
			while (self.toTest.length > 0) {
				var cell = self.toTest.shift();
				var connectedNeighbors = self.findConnectedNeighbors(cell);
				if (connectedNeighbors.length >= 3) {
					var firstCellColRow = self.findCellColRow(connectedNeighbors[0]);
					connectedNeighbors.forEach(function (neighborCell) {
						self.deleteCell(neighborCell);
					});
					if (firstCellColRow) {
						var newCell = new Cell();
						var targetPos = self.calculateTargetPosition(firstCellColRow.col, firstCellColRow.row);
						newCell.move(targetPos.x, targetPos.y, true);
						grid[firstCellColRow.col][firstCellColRow.row] = newCell;
						gridContainer.addChild(newCell);
					}
				}
			}
		}
	});
	var bottomTiles = [];
	var draggedTile = null;
	self.addBottomTiles = function () {
		var numberOfTiles = 3;
		var totalTilesWidth = numberOfTiles * tileWidth + (numberOfTiles - 1) * gridSpacing;
		var margin = (2048 - totalTilesWidth) / 2;
		var spacing = margin + tileWidth / 2;
		var posY = 2732 - tileHeight / 2 - margin;
		for (var i = 0; i < numberOfTiles; i++) {
			var tile = new Tile();
			var posX = spacing + i * (tileWidth + gridSpacing);
			tile.move(posX, 2732 + tileHeight, true);
			tile.move(posX, posY);
			bottomTiles[i] = tile;
			tile.on('down', function () {
				draggedTile = this;
			});
			self.addChild(tile);
		}
	};
	stage.on('up', function (obj) {
		self.resetBackgroundGridCells();
		if (draggedTile) {
			var overlappingCells = self.getOverlappingCells(draggedTile);
			if (overlappingCells.length === draggedTile.cells.length) {
				overlappingCells.forEach(function (bgCell, index) {
					var colRow = self.findBgCellColRow(bgCell);
					if (colRow && draggedTile.cells[index]) {
						var cell = draggedTile.cells[index];
						var targetPos = self.calculateTargetPosition(colRow.col, colRow.row);
						cell.move(targetPos.x, targetPos.y, true);
						grid[colRow.col][colRow.row] = cell;
						gridContainer.addChild(cell);
						self.toTest.push(cell);
					}
				});
				var tileIndex = bottomTiles.indexOf(draggedTile);
				if (tileIndex !== -1) {
					bottomTiles.splice(tileIndex, 1);
				}
				draggedTile.destroy();
				if (bottomTiles.length === 0) {
					self.addBottomTiles();
				}
				draggedTile = null;
			}
		}
		draggedTile = null;
	});
	self.addBottomTiles();
});