def add_round(self, id: int, round: BaseRound) -> None:
    """
    Add a round to the session.
    :param id: The id of the round.
    :param round: The round to be added.
    """
    self._rounds[id] = round

def capture_last_snapshot(self) -> None:
    """
    Capture the last snapshot of the application, including the screenshot and the XML file if configured.
    """

    # Capture the final screenshot
    screenshot_save_path = self.log_path + f"action_step_final.png"

    if self.application_window is not None:

        try:
            PhotographerFacade().capture_app_window_screenshot(
                self.application_window, save_path=screenshot_save_path
            )

        except Exception as e:
            utils.print_with_color(
                f"Warning: The last snapshot capture failed, due to the error: {e}",
                "yellow",
            )

        # Save the final XML file
        if configs["LOG_XML"]:
            log_abs_path = os.path.abspath(self.log_path)
            xml_save_path = os.path.join(log_abs_path, f"xml/action_step_final.xml")

            app_agent = self._host_agent.get_active_appagent()
            if app_agent is not None:
                app_agent.Puppeteer.save_to_xml(xml_save_path)

def create_following_round(self) -> BaseRound:
    """
    Create a following round.
    return: The following round.
    """
    pass

@abstractmethod
def create_new_round(self) -> Optional[BaseRound]:
    """
    Create a new round.
    """
    pass

def evaluation(self) -> None:
    """
    Evaluate the session.
    """
    utils.print_with_color("Evaluating the session...", "yellow")
    evaluator = EvaluationAgent(
        name="eva_agent",
        app_root_name=self.context.get(ContextNames.APPLICATION_ROOT_NAME),
        is_visual=configs["APP_AGENT"]["VISUAL_MODE"],
        main_prompt=configs["EVALUATION_PROMPT"],
        example_prompt="",
        api_prompt=configs["API_PROMPT"],
    )

    requests = self.request_to_evaluate()
    result, cost = evaluator.evaluate(request=requests, log_path=self.log_path)

    # Add additional information to the evaluation result.
    additional_info = {"level": "session", "request": requests, "id": 0}
    result.update(additional_info)

    self.cost += cost

    evaluator.print_response(result)

    self.evaluation_logger.info(json.dumps(result))

def experience_saver(self) -> None:
    """
    Save the current trajectory as agent experience.
    """
    utils.print_with_color(
        "Summarizing and saving the execution flow as experience...", "yellow"
    )

    summarizer = ExperienceSummarizer(
        configs["APP_AGENT"]["VISUAL_MODE"],
        configs["EXPERIENCE_PROMPT"],
        configs["APPAGENT_EXAMPLE_PROMPT"],
        configs["API_PROMPT"],
    )
    experience = summarizer.read_logs(self.log_path)
    summaries, cost = summarizer.get_summary_list(experience)

    experience_path = configs["EXPERIENCE_SAVED_PATH"]
    utils.create_folder(experience_path)
    summarizer.create_or_update_yaml(
        summaries, os.path.join(experience_path, "experience.yaml")
    )
    summarizer.create_or_update_vector_db(
        summaries, os.path.join(experience_path, "experience_db")
    )

    self.cost += cost
    utils.print_with_color("The experience has been saved.", "magenta")

@staticmethod
def initialize_logger(log_path: str, log_filename: str) -> logging.Logger:
    """
    Initialize logging.
    log_path: The path of the log file.
    log_filename: The name of the log file.
    return: The logger.
    """
    # Code for initializing logging
    logger = logging.Logger(log_filename)

    if not configs["PRINT_LOG"]:
        # Remove existing handlers if PRINT_LOG is False
        logger.handlers = []

    log_file_path = os.path.join(log_path, log_filename)
    file_handler = logging.FileHandler(log_file_path, encoding="utf-8")
    formatter = logging.Formatter("%(message)s")
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)
    logger.setLevel(configs["LOG_LEVEL"])

    return logger

def is_error(self):
    """
    Check if the session is in error state.
    return: True if the session is in error state, otherwise False.
    """
    if self.current_round is not None:
        return self.current_round.state.name() == AgentStatus.ERROR.value
    return False

def is_finished(self) -> bool:
    """
    Check if the session is ended.
    return: True if the session is ended, otherwise False.
    """
    if self._finish or self.step >= configs["MAX_STEP"]:
        return True

    if self.is_error():
        return True

    return False

@abstractmethod
def next_request(self) -> str:
    """
    Get the next request of the session.
    return: The request of the session.
    """
    pass

def print_cost(self) -> None:
    """
    Print the total cost of the session.
    """

    if isinstance(self.cost, float) and self.cost > 0:
        formatted_cost = "${:.2f}".format(self.cost)
        utils.print_with_color(
            f"Total request cost of the session: {formatted_cost}$", "yellow"
        )
    else:
        utils.print_with_color(
            "Cost is not available for the model {host_model} or {app_model}.".format(
                host_model=configs["HOST_AGENT"]["API_MODEL"],
                app_model=configs["APP_AGENT"]["API_MODEL"],
            ),
            "yellow",
        )

@abstractmethod
def request_to_evaluate(self) -> str:
    """
    Get the request to evaluate.
    return: The request(s) to evaluate.
    """
    pass

def run(self) -> None:
    """
    Run the session.
    """

    while not self.is_finished():

        round = self.create_new_round()
        if round is None:
            break
        round.run()

    if self.application_window is not None:
        self.capture_last_snapshot()

    if self._should_evaluate and not self.is_error():
        self.evaluation()

    self.print_cost()