game.py

from collections import namedtuple

BOARD_SIZE = [3, 3]
Field = namedtuple("Field", ["status", "status_img"])

FIELDS = {"x": ("x", "x.png"), "o": ("o", "o.png"), "e": ("e", "empty.png")}

WINNING_COMBINATIONS = [
    ((0, 0), (0, 1), (0, 2)),
    ((1, 0), (1, 1), (1, 2)),
    ((2, 0), (2, 1), (2, 2)),
    ((0, 0), (1, 0), (2, 0)),
    ((0, 1), (1, 1), (2, 1)),
    ((0, 2), (1, 2), (2, 2)),
    ((0, 0), (1, 1), (2, 2)),
    ((2, 0), (1, 1), (0, 2)),
]


class Game:
    def copy(self):
        new = Game()
        for position in self.filled_fields:
            x,y = position
            new.board[x][y] = self.board[x][y]
        new.filled_fields = list(self.filled_fields)
        return new

    def __init__(self):
        self.board = self.__setup_board()
        self.winner = None
        self.filled_fields = []

    def __setup_board(self):
        return [[Field(status=FIELDS["e"][0], status_img=FIELDS["e"][1]) for j in range(BOARD_SIZE[1])] for i in range(BOARD_SIZE[0])]

    def update_single_field(self, value: str, position: tuple) -> list:
        x, y = position
        if self.board[x][y].status == FIELDS["e"][0]:
            self.board[x][y] = Field(
                status=FIELDS[value][0], status_img=FIELDS[value][1]
            )
        self.filled_fields.append(position)
        return self.board

    @property
    def finished(self) -> bool:
        for combination in WINNING_COMBINATIONS:
            x, y, z = combination
            x_object = self.board[x[0]][x[1]]
            y_object = self.board[y[0]][y[1]]
            z_object = self.board[z[0]][z[1]]

            if (
                len([x for x in [x_object, y_object, z_object] if x.status != "e"]) == 3
            ):
                if x_object.status == y_object.status == z_object.status:
                    self.winner = x_object.status
                    return True
        return False

    @property
    def available_fields(self) -> list:
        available_fields = []
        for i in range(BOARD_SIZE[0]):
            for j in range(BOARD_SIZE[1]):
                if self.board[i][j].status == "e":
                    available_fields.append((i, j))
        return available_fields