class Shooter:
    name = "shooter"
    character = 'I'
    display = False

    def __init__(self):
        self.position = (0, 0)

    def handle_keystroke(self, keystroke, game):
      
        if keystroke == ' ' and not self.display:
            ship = game.get_agent_by_name('ship')
            if ship is None:
                return

            x, y = ship.position
            new_position = (x, y - 1)

            if game.on_board(new_position):
                self.position = new_position
                self.display = True

    def play_turn(self, game):
  
        if not self.display:
    
            return

        x, y = self.position
        new_position = (x, y - 1)


        if not game.on_board(new_position):
            self.display = False
            return

        agents_by_position = game.get_agents_by_position()
        agents_here = agents_by_position.get(new_position, [])

        for agent in agents_here:
            if getattr(agent, "character", None) == 'A':
                game.end()
                return

        self.position = new_position