autogen/python/samples/demos/chess_game.py

"""This is an example of simulating a chess game with two agents
that play against each other, using tools to reason about the game state
and make moves, and using a group chat manager to orchestrate the conversation."""

import argparse
import asyncio
import logging
import os
import sys
from typing import Annotated, Literal

from agnext.application import SingleThreadedAgentRuntime
from agnext.components.models import SystemMessage
from agnext.components.tools import FunctionTool
from agnext.core import AgentRuntime
from chess import BLACK, SQUARE_NAMES, WHITE, Board, Move
from chess import piece_name as get_piece_name

sys.path.append(os.path.join(os.path.dirname(__file__), ".."))

from common.agents._chat_completion_agent import ChatCompletionAgent
from common.memory import BufferedChatMemory
from common.patterns._group_chat_manager import GroupChatManager
from common.types import TextMessage
from common.utils import get_chat_completion_client_from_envs


def validate_turn(board: Board, player: Literal["white", "black"]) -> None:
    """Validate that it is the player's turn to move."""
    last_move = board.peek() if board.move_stack else None
    if last_move is not None:
        if player == "white" and board.color_at(last_move.to_square) == WHITE:
            raise ValueError("It is not your turn to move. Wait for black to move.")
        if player == "black" and board.color_at(last_move.to_square) == BLACK:
            raise ValueError("It is not your turn to move. Wait for white to move.")
    elif last_move is None and player != "white":
        raise ValueError("It is not your turn to move. Wait for white to move first.")


def get_legal_moves(
    board: Board, player: Literal["white", "black"]
) -> Annotated[str, "A list of legal moves in UCI format."]:
    """Get legal moves for the given player."""
    validate_turn(board, player)
    legal_moves = list(board.legal_moves)
    if player == "black":
        legal_moves = [move for move in legal_moves if board.color_at(move.from_square) == BLACK]
    elif player == "white":
        legal_moves = [move for move in legal_moves if board.color_at(move.from_square) == WHITE]
    else:
        raise ValueError("Invalid player, must be either 'black' or 'white'.")
    if not legal_moves:
        return "No legal moves. The game is over."

    return "Possible moves are: " + ", ".join([move.uci() for move in legal_moves])


def get_board(board: Board) -> str:
    return str(board)


def make_move(
    board: Board,
    player: Literal["white", "black"],
    thinking: Annotated[str, "Thinking for the move."],
    move: Annotated[str, "A move in UCI format."],
) -> Annotated[str, "Result of the move."]:
    """Make a move on the board."""
    validate_turn(board, player)
    newMove = Move.from_uci(move)
    board.push(newMove)

    # Print the move.
    print("-" * 50)
    print("Player:", player)
    print("Move:", newMove.uci())
    print("Thinking:", thinking)
    print("Board:")
    print(board.unicode(borders=True))

    # Get the piece name.
    piece = board.piece_at(newMove.to_square)
    assert piece is not None
    piece_symbol = piece.unicode_symbol()
    piece_name = get_piece_name(piece.piece_type)
    if piece_symbol.isupper():
        piece_name = piece_name.capitalize()
    return f"Moved {piece_name} ({piece_symbol}) from {SQUARE_NAMES[newMove.from_square]} to {SQUARE_NAMES[newMove.to_square]}."


async def chess_game(runtime: AgentRuntime) -> None:  # type: ignore
    """Create agents for a chess game and return the group chat."""

    # Create the board.
    board = Board()

    # Create tools for each player.
    # @functools.wraps(get_legal_moves)
    def get_legal_moves_black() -> str:
        return get_legal_moves(board, "black")

    # @functools.wraps(get_legal_moves)
    def get_legal_moves_white() -> str:
        return get_legal_moves(board, "white")

    # @functools.wraps(make_move)
    def make_move_black(
        thinking: Annotated[str, "Thinking for the move"],
        move: Annotated[str, "A move in UCI format"],
    ) -> str:
        return make_move(board, "black", thinking, move)

    # @functools.wraps(make_move)
    def make_move_white(
        thinking: Annotated[str, "Thinking for the move"],
        move: Annotated[str, "A move in UCI format"],
    ) -> str:
        return make_move(board, "white", thinking, move)

    def get_board_text() -> Annotated[str, "The current board state"]:
        return get_board(board)

    black_tools = [
        FunctionTool(
            get_legal_moves_black,
            name="get_legal_moves",
            description="Get legal moves.",
        ),
        FunctionTool(
            make_move_black,
            name="make_move",
            description="Make a move.",
        ),
        FunctionTool(
            get_board_text,
            name="get_board",
            description="Get the current board state.",
        ),
    ]

    white_tools = [
        FunctionTool(
            get_legal_moves_white,
            name="get_legal_moves",
            description="Get legal moves.",
        ),
        FunctionTool(
            make_move_white,
            name="make_move",
            description="Make a move.",
        ),
        FunctionTool(
            get_board_text,
            name="get_board",
            description="Get the current board state.",
        ),
    ]

    black = await runtime.register_and_get(
        "PlayerBlack",
        lambda: ChatCompletionAgent(
            description="Player playing black.",
            system_messages=[
                SystemMessage(
                    content="You are a chess player and you play as black. "
                    "Use get_legal_moves() to get list of legal moves. "
                    "Use get_board() to get the current board state. "
                    "Think about your strategy and call make_move(thinking, move) to make a move."
                ),
            ],
            memory=BufferedChatMemory(buffer_size=10),
            model_client=get_chat_completion_client_from_envs(model="gpt-4o"),
            tools=black_tools,
        ),
    )
    white = await runtime.register_and_get(
        "PlayerWhite",
        lambda: ChatCompletionAgent(
            description="Player playing white.",
            system_messages=[
                SystemMessage(
                    content="You are a chess player and you play as white. "
                    "Use get_legal_moves() to get list of legal moves. "
                    "Use get_board() to get the current board state. "
                    "Think about your strategy and call make_move(thinking, move) to make a move."
                ),
            ],
            memory=BufferedChatMemory(buffer_size=10),
            model_client=get_chat_completion_client_from_envs(model="gpt-4o"),
            tools=white_tools,
        ),
    )
    # Create a group chat manager for the chess game to orchestrate a turn-based
    # conversation between the two agents.
    await runtime.register(
        "ChessGame",
        lambda: GroupChatManager(
            description="A chess game between two agents.",
            memory=BufferedChatMemory(buffer_size=10),
            participants=[white, black],  # white goes first
        ),
    )


async def main() -> None:
    runtime = SingleThreadedAgentRuntime()
    await chess_game(runtime)
    run_context = runtime.start()
    # Publish an initial message to trigger the group chat manager to start orchestration.
    await runtime.publish_message(TextMessage(content="Game started.", source="System"), namespace="default")
    await run_context.stop_when_idle()


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Run a chess game between two agents.")
    parser.add_argument("--verbose", action="store_true", help="Enable verbose logging.")
    args = parser.parse_args()
    if args.verbose:
        logging.basicConfig(level=logging.WARNING)
        logging.getLogger("agnext").setLevel(logging.DEBUG)
        handler = logging.FileHandler("chess_game.log")
        logging.getLogger("agnext").addHandler(handler)

    asyncio.run(main())