text: """Ezviz cloud MQTT client for push messages."""
  
  import base64
  import json
  import threading
  import time
  
  import paho.mqtt.client as mqtt
  import requests
  
  from .constants import DEFAULT_TIMEOUT, FEATURE_CODE
  from .exceptions import HTTPError, InvalidURL, PyEzvizError
  
  API_ENDPOINT_SERVER_INFO = "/v3/configurations/system/info"
  API_ENDPOINT_REGISTER_MQTT = "/v1/getClientId"
  API_ENDPOINT_START_MQTT = "/api/push/start"
  API_ENDPOINT_STOP_MQTT = "/api/push/stop"
  
  
  MQTT_APP_KEY = "4c6b3cc2-b5eb-4813-a592-612c1374c1fe"
  APP_SECRET = "17454517-cc1c-42b3-a845-99b4a15dd3e6"
  
  
  def on_subscribe(client, userdata, mid, granted_qos):
      """On MQTT message subscribe."""
      # pylint: disable=unused-argument
      print("Subscribed: " + str(mid) + " " + str(granted_qos))
  
  
  def on_connect(client, userdata, flags, return_code):
      """On MQTT connect."""
      # pylint: disable=unused-argument
      if return_code == 0:
          print("connected OK Returned code=", return_code)
      else:
          print("Bad connection Returned code=", return_code)
          client.reconnect()
  
  
  def on_message(client, userdata, msg):
      """On MQTT message receive."""
      # pylint: disable=unused-argument
      mqtt_message = json.loads(msg.payload)
      mqtt_message["ext"] = mqtt_message["ext"].split(",")
  
      # Print payload message
      decoded_message = {
          mqtt_message["ext"][2]: {
              "id": mqtt_message["id"],
              "alert": mqtt_message["alert"],
              "time": mqtt_message["ext"][1],
              "alert type": mqtt_message["ext"][4],
              "image": mqtt_message["ext"][16],
          }
      }
      print(decoded_message)
  
  
  class MQTTClient(threading.Thread):
      """Open MQTT connection to ezviz cloud."""
  
      def __init__(
          self,
          token,
          timeout=DEFAULT_TIMEOUT,
      ):
          """Initialize the client object."""
          threading.Thread.__init__(self)
          self._session = None
          self._token = token or {
              "session_id": None,
              "rf_session_id": None,
              "username": None,
              "api_url": "apiieu.ezvizlife.com",
          }
          self._timeout = timeout
          self._stop_event = threading.Event()
          self._mqtt_data = {
              "mqtt_clientid": None,
              "ticket": None,
              "push_url": token["service_urls"]["pushAddr"],
          }
  
      def _mqtt(self):
          """Receive MQTT messages from ezviz server."""
  
          ezviz_mqtt_client = mqtt.Client(
              client_id=self._mqtt_data["mqtt_clientid"], protocol=4, transport="tcp"
          )
          ezviz_mqtt_client.on_connect = on_connect
          ezviz_mqtt_client.on_subscribe = on_subscribe
          ezviz_mqtt_client.on_message = on_message
          ezviz_mqtt_client.username_pw_set(MQTT_APP_KEY, APP_SECRET)
  
          ezviz_mqtt_client.connect(self._mqtt_data["push_url"], 1882, 60)
          ezviz_mqtt_client.subscribe(
              f"{MQTT_APP_KEY}/ticket/{self._mqtt_data['ticket']}", qos=2
          )
  
          ezviz_mqtt_client.loop_start()
          return ezviz_mqtt_client
  
      def _register_ezviz_push(self):
          """Register for push messages."""
  
          auth_seq = base64.b64encode(f"{MQTT_APP_KEY}:{APP_SECRET}".encode("ascii"))
          auth_seq = "Basic " + auth_seq.decode()
  
          payload = {
              "appKey": MQTT_APP_KEY,
              "clientType": "5",
              "mac": FEATURE_CODE,
              "token": "123456",
              "version": "v1.3.0",
          }
  
          try:
              req = self._session.post(
                  f"https://{self._mqtt_data['push_url']}{API_ENDPOINT_REGISTER_MQTT}",
                  allow_redirects=False,
                  headers={"Authorization": auth_seq},
                  data=payload,
                  timeout=self._timeout,
              )
  
              req.raise_for_status()
  
          except requests.ConnectionError as err:
              raise InvalidURL("A Invalid URL or Proxy error occured") from err
  
          except requests.HTTPError as err:
              raise HTTPError from err
  
          try:
              json_result = req.json()
  
          except ValueError as err:
              raise PyEzvizError(
                  "Impossible to decode response: "
                  + str(err)
                  + "\nResponse was: "
                  + str(req.text)
              ) from err
  
          self._mqtt_data["mqtt_clientid"] = json_result["data"]["clientId"]
  
      def run(self):
          """Represent the thread's activity, should not be used directly."""
  
          if self._session is None:
              self._session = requests.session()
              self._session.headers.update(
                  {"User-Agent": "okhttp/3.12.1"}
              )  # Android generic user agent.
  
          self._register_ezviz_push()
          self._start_ezviz_push()
          self._mqtt()
  
          try:
              while not self._stop_event.is_set():
                  time.sleep(1)
          except KeyboardInterrupt:
              self.stop()
  
      def start(self):
          """Start mqtt thread."""
          super().start()
  
      def stop(self):
          """Stop push notifications."""
  
          payload = {
              "appKey": MQTT_APP_KEY,
              "clientId": self._mqtt_data["mqtt_clientid"],
              "clientType": 5,
              "sessionId": self._token["session_id"],
              "username": self._token["username"],
          }
  
          try:
              req = self._session.post(
                  f"https://{self._mqtt_data['push_url']}{API_ENDPOINT_STOP_MQTT}",
                  data=payload,
                  timeout=self._timeout,
              )
  
              req.raise_for_status()
  
          except requests.ConnectionError as err:
              raise InvalidURL("A Invalid URL or Proxy error occured") from err
  
          except requests.HTTPError as err:
              raise HTTPError from err
  
          self._stop_event.set()
  
      def _start_ezviz_push(self):
          """Send start for push messages to ezviz api."""
  
          payload = {
              "appKey": MQTT_APP_KEY,
              "clientId": self._mqtt_data["mqtt_clientid"],
              "clientType": 5,
              "sessionId": self._token["session_id"],
              "username": self._token["username"],
              "token": "123456",
          }
  
          try:
              req = self._session.post(
                  f"https://{self._mqtt_data['push_url']}{API_ENDPOINT_START_MQTT}",
                  allow_redirects=False,
                  data=payload,
                  timeout=self._timeout,
              )
  
              req.raise_for_status()
  
          except requests.ConnectionError as err:
              raise InvalidURL("A Invalid URL or Proxy error occured") from err
  
          except requests.HTTPError as err:
              raise HTTPError from err
  
          try:
              json_result = req.json()
  
          except ValueError as err:
              raise PyEzvizError(
                  "Impossible to decode response: "
                  + str(err)
                  + "\nResponse was: "
                  + str(req.text)
              ) from err
  
          self._mqtt_data["ticket"] = json_result["ticket"]
  