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col < COLS; col++) {\n const firstNullIndex = state.board[col].findIndex(x => x === null);\n if (firstNullIndex >= 0) moves.push([col, firstNullIndex]);\n }\n return moves;\n}\n\nfunction checkVerticalWin(state: State) {\n for (let col = 0; col < COLS; col++) {\n for (let row = 0; row < 3; row++) {\n let check = eq(\n get(state, col, row + 0),\n get(state, col, row + 1),\n get(state, col, row + 2),\n get(state, col, row + 3),\n );\n if (check) console.log(state.board);\n if (check) return true;\n }\n }\n return false;\n}\nfunction checkHorizontalWin(state: State) {\n for (let row = 0; row < ROWS; row++) {\n for (let col = 0; col < 4; col++) {\n let check = eq(\n get(state, col + 0, row),\n get(state, col + 1, row),\n get(state, col + 2, row),\n get(state, col + 3, row),\n );\n if (check) return true;\n }\n }\n return false;\n}\nfunction checkDiagonalUpWin(state: State) {\n for (let col = 0; col < 4; col++) {\n for (let row = 0; row < 3; row++) {\n let check = eq(\n get(state, col + 0, row + 0),\n get(state, col + 1, row + 1),\n get(state, col + 2, row + 2),\n get(state, col + 3, row + 3),\n );\n if (check) return true;\n }\n }\n return false;\n}\nfunction checkDiagonalDownWin(state: State) {\n for (let col = 0; col < 4; col++) {\n for (let row = 3; row < 6; row++) {\n let check = eq(\n get(state, col + 0, row - 0),\n get(state, col + 1, row - 1),\n get(state, col + 2, row - 2),\n get(state, col + 3, row - 3),\n );\n if (check) return true;\n }\n }\n return false;\n}\n\nfunction act(state: State, move: Move, player: number): State {\n const newState = clone(state);\n set(newState, ...move, player);\n return newState;\n}\n\nfunction winningMove(state: State, move: Move) {\n const possibleStateMe = act(state, move, 0);\n if (\n checkVerticalWin(possibleStateMe) || checkHorizontalWin(possibleStateMe) || checkDiagonalUpWin(possibleStateMe)\n || checkDiagonalDownWin(possibleStateMe)\n ) {\n return true;\n }\n const possibleStateOther = act(state, move, 1);\n if (\n checkVerticalWin(possibleStateOther) || checkHorizontalWin(possibleStateOther)\n || checkDiagonalUpWin(possibleStateOther) || checkDiagonalDownWin(possibleStateOther)\n ) {\n return true;\n }\n return false;\n}\n\nfunction move(state: State): Action {\n const options = possibleMoves(state);\n console.log(options);\n const next_player = 1 - state.active_player;\n for (const option of options) {\n if (winningMove(state, option)) {\n console.log(\"winning move\", option);\n return {\n player: next_player,\n column: option[0],\n };\n }\n }\n\n // pick first one\n console.log(\"default move\");\n return {\n player: next_player,\n column: options[0][0],\n };\n}\n\nexport default async function handler(req: Request): Promise {\n if (req.method !== \"POST\") return new Response(\"agent\");\n const data = await req.json();\n console.log(\"state\", data);\n return Response.json(move(data.state));\n}","deleted","label",[99],"permalink","https://www.val.town/x/neverstew/connect4Agent/code/main.tsx","extension","actionData","errors"]