import requests
import json
import secrets


class ModelClient:
    def __init__(self):
        self.session_hash = self._generate_random_hash()
        self.join_url = "https://yuntian-deng-chatgpt4turbo.hf.space/queue/join?__theme=light"
        self.stream_url = f"https://yuntian-deng-chatgpt4turbo.hf.space/queue/data?session_hash={self.session_hash}"
        self.headers = {
            "accept": "*/*",
            "accept-language": "ru,en;q=0.9",
            "content-type": "application/json",
            "priority": "u=1, i",
            "sec-ch-ua": "\"Not/A)Brand\";v=\"8\", \"Chromium\";v=\"126\", \"YaBrowser\";v=\"24.7\", \"Yowser\";v=\"2.5\"",
            "sec-ch-ua-mobile": "?0",
            "sec-ch-ua-platform": "\"Windows\"",
            "sec-fetch-dest": "empty",
            "sec-fetch-mode": "cors",
            "sec-fetch-site": "same-origin"
        }

    def _generate_random_hash(self, length=10):
        """Генерирует случайный хэш указанной длины"""
        characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
        return ''.join(secrets.choice(characters) for _ in range(length))

    def _make_join_request(self, body):
        try:
            response = requests.post(self.join_url, headers=self.headers, json=body)
            response.raise_for_status()
        except requests.exceptions.HTTPError as e:
            print(f"HTTP error occurred: {e}")
        except Exception as e:
            print(f"An error occurred: {e}")
        return None

    def _make_stream_request(self):
        try:
            response = requests.get(self.stream_url, headers={**self.headers, 'accept': "text/event-stream"},
                                    stream=True)
            response.raise_for_status()
            return response
        except requests.exceptions.HTTPError as e:
            print(f"HTTP error occurred: {e}")
        except Exception as e:
            print(f"An error occurred: {e}")
        return None

    def _process_stream_response(self, response):
        response_message = ""
        if response:
            for chunk in response.iter_lines():
                if chunk:
                    try:
                        event_data = json.loads(chunk.decode('utf-8').replace("data: ", ""))
                        if event_data.get('msg') == "process_generating":
                            if event_data['output']['data'][0]:
                                output = event_data['output']['data'][0][-1]
                                response_message += output[-1]
                    except json.JSONDecodeError:
                        continue
        return response_message

    def get_response(self, message, history, sys_prompt):
        body = {
            "data": [sys_prompt + "\n" + message, 1, 1, len(history), history, None],
            "event_data": None,
            "fn_index": 3,
            "trigger_id": 5,
            "session_hash": self.session_hash
        }
        self._make_join_request(body)
        stream_response = self._make_stream_request()
        response = self._process_stream_response(stream_response)
        return response


Мне нужно изменить логику. Хэш должен генерироваться в том случае если history пустой, то есть каждый раз после очистки истории будет создаваться новый хэш