# ball.py
class Ball:
    character = "O"
    name = "ball"

    def __init__(self, position):
        self.position = position
        self.velocity = (1, 1)

    def play_turn(self, game):
        x, y = self.position
        vx, vy = self.velocity
        new_x = x + vx
        new_y = y + vy
        board_x, board_y = game.board_size
        if new_x < 0 or board_x <= new_x:
            self.velocity = (-vx, vy)
        elif new_y < 0 or board_y <= new_y:
            self.velocity = (vx, -vy)
        elif self.check_for_collision_with_paddle((new_x, new_y), game):
            self.velocity = (vx, -vy)
        else:
            self.position = (new_x, new_y)

    def check_for_collision_with_paddle(self, position, game):
        """Checks whether the given position collides with a piece of the paddle.
        We pass a position rather than using self.position so that we can check 
        potential future positions.
        """
        for agent in game.get_agents_by_position()[position]:
            if not isinstance(agent, Ball): 
                return True