Number Chain Puzzle

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rect.left\n const y = touch.clientY - rect.top\n const cellSize = rect.width / BOARD_SIZE\n\n const row = Math.floor(y / cellSize)\n const col = Math.floor(x / cellSize)\n\n if (row >= 0 && row < BOARD_SIZE && col >= 0 && col < BOARD_SIZE) {\n handleCellEnter(row, col)\n }\n }\n\n const handleTouchEnd = () => {\n setIsDragging(false)\n if (selectedCells.length > 1) {\n processChain()\n } else {\n setSelectedCells([])\n }\n }\n\n const handleMouseDown = (row: number, col: number) => {\n setIsDragging(true)\n setSelectedCells([[row, col]])\n }\n\n const handleMouseEnter = (row: number, col: number) => {\n if (!isDragging) return\n handleCellEnter(row, col)\n }\n\n const handleMouseUp = () => {\n handleTouchEnd()\n }\n\n const handleCellEnter = (row: number, col: number) => {\n setSelectedCells(prev => {\n if (prev.length === 0) return [[row, col]]\n const lastSelected = prev[prev.length - 1]\n if (\n isValidCell(lastSelected) && isValidCell([row, col])\n && isAdjacent(lastSelected, [row, col])\n && board[row][col] === board[lastSelected[0]][lastSelected[1]]\n && !prev.some(cell => isValidCell(cell) && cell[0] === row && cell[1] === col)\n ) {\n return [...prev, [row, col]]\n }\n return prev\n })\n }\n\n const isValidCell = (cell: any): cell is [number, number] => {\n return Array.isArray(cell) && cell.length === 2\n && typeof cell[0] === \"number\" && typeof cell[1] === \"number\"\n && cell[0] >= 0 && cell[0] < BOARD_SIZE\n && cell[1] >= 0 && cell[1] < BOARD_SIZE\n }\n\n const isAdjacent = (cell1: [number, number], cell2: [number, number]) => {\n if (!isValidCell(cell1) || !isValidCell(cell2)) return false\n const [row1, col1] = cell1\n const [row2, col2] = cell2\n return Math.abs(row1 - row2) <= 1 && Math.abs(col1 - col2) <= 1 && !(row1 === row2 && col1 === col2)\n }\n\n const getRandomPowerOfTwo = (min: number, max: number) => {\n const minPower = Math.ceil(Math.log2(min))\n const maxPower = Math.floor(Math.log2(max))\n return Math.pow(2, Math.floor(Math.random() * (maxPower - minPower + 1)) + minPower)\n }\n\n const processChain = () => {\n if (selectedCells.length < 2 || !isValidCell(selectedCells[0])) {\n setSelectedCells([])\n return\n }\n\n const newBoard = [...board.map(row => [...row])]\n const cellValue = board[selectedCells[0][0]][selectedCells[0][1]]\n const chainTotal = cellValue * selectedCells.length\n const roundedTotal = Math.pow(2, Math.ceil(Math.log2(chainTotal)))\n const points = chainTotal\n\n // Set the last cell in the chain to the rounded total\n const lastCell = selectedCells[selectedCells.length - 1]\n if (isValidCell(lastCell)) {\n const [lastRow, lastCol] = lastCell\n newBoard[lastRow][lastCol] = roundedTotal\n }\n\n // Find min and max values on the board\n const allValues = newBoard.flat()\n const minValue = Math.min(...allValues)\n const maxValue = Math.max(...allValues)\n\n // Set other cells in the chain to new random values\n const newCellsToAnimate: [number, number][] = []\n for (let i = 0; i < selectedCells.length - 1; i++) {\n const cell = selectedCells[i]\n if (isValidCell(cell)) {\n const [row, col] = cell\n newBoard[row][col] = getRandomPowerOfTwo(minValue, maxValue)\n newCellsToAnimate.push([row, col])\n }\n }\n\n setBoard(newBoard)\n setScore(prevScore => prevScore + points)\n setAnimatingCells([...selectedCells])\n setNewCells(newCellsToAnimate)\n\n // Clear animations after they're done\n setTimeout(() => {\n setAnimatingCells([])\n setSelectedCells([])\n setNewCells([])\n }, 500)\n }\n\n return (\n

\n e.preventDefault()}\n onTouchMove={(e) => {\n e.preventDefault()\n handleTouchMove(e)\n }}\n onTouchEnd={handleTouchEnd}\n >\n {board.map((row, i) => (\n

\n {row.map((cell, j) => (\n r === i && c === j) ? \"selected\" : \"\"}\n ${animatingCells.some(([r, c]) => r === i && c === j) ? \"animating\" : \"\"}\n ${newCells.some(([r, c]) => r === i && c === j) ? \"new-cell\" : \"\"}\n `}\n style={{ backgroundColor: getColor(cell) }}\n onMouseDown={() => handleMouseDown(i, j)}\n onMouseEnter={() => handleMouseEnter(i, j)}\n onTouchStart={() => handleTouchStart(i, j)}\n >\n {cell}\n

\n ))}\n

\n ))}\n \n

Score: {score}

\n \n \n

\n {showInfo && (\n

How to Play

\n Drag or swipe between adjacent cells (including diagonals) with the same number to form a chain and score\n points!\n

The last cell in the chain will hold the total value rounded up to the nearest power of two.

\n \n

\n )}\n \n )\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render()\n}\n\nif (typeof document !== \"undefined\") { client() }\n\nasync function server(request: Request): Promise {\n return new Response(\n `\n \n \n Number Chain Puzzle\n \n \n \n \n

\n \n \n \n \n `,\n {\n headers: {\n \"content-type\": \"text/html\",\n },\n },\n )\n}\n\nconst css = `\nbody {\n font-family: Arial, sans-serif;\n justify-content: center;\n align-items: center;\n min-height: 100vh;\n margin: 0;\n background-color: #1a1a1a;\n color: #ffffff;\n user-select: none;\n}\n\n.game-container {\n text-align: center;\n width: 100%;\n max-width: 600px;\n box-sizing: border-box;\n margin: auto;\n}\n\n.board {\n display: inline-block;\n background-color: #2a2a2a;\n border-radius: 6px;\n padding: 10px;\n user-select: none;\n touch-action: none;\n width: 100%;\n max-width: 400px;\n margin: 0 auto;\n box-sizing: border-box;\n}\n\n.row {\n display: flex;\n}\n\n.cell {\n flex: 1;\n aspect-ratio: 1;\n margin: 5px;\n display: flex;\n justify-content: center;\n align-items: center;\n font-size: 16px;\n font-weight: bold;\n border-radius: 4px;\n cursor: pointer;\n transition: transform 0.3s;\n color: #ffffff;\n border: 2px solid transparent;\n box-sizing: border-box;\n}\n\n.cell:hover {\n filter: brightness(1.2);\n}\n\n.cell.selected {\n transform: scale(0.9);\n border: 2px solid white;\n}\n\n.cell.animating {\n animation: pulse 0.5s;\n}\n\n.cell.new-cell {\n animation: appear 0.5s;\n border: 2px solid transparent;\n}\n\n@keyframes pulse {\n 0% {\n transform: scale(1);\n }\n 50% {\n transform: scale(1.2);\n }\n 100% {\n transform: scale(1);\n }\n}\n\n@keyframes appear {\n 0% {\n opacity: 0;\n transform: scale(0);\n }\n 100% {\n opacity: 1;\n transform: scale(1);\n }\n}\n\n.controls {\n margin-top: 20px;\n}\n\nbutton {\n margin: 10px;\n padding: 10px 20px;\n font-size: 16px;\n background-color: #4a4a4a;\n color: white;\n border: none;\n border-radius: 4px;\n cursor: pointer;\n}\n\nbutton:hover {\n background-color: #5a5a5a;\n}\n\n.info-dialog {\n position: fixed;\n top: 0;\n left: 0;\n width: 100%;\n height: 100%;\n background-color: rgba(0, 0, 0, 0.5);\n display: flex;\n justify-content: center;\n align-items: center;\n z-index: 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Code