Cloud refactoring: hass is not available in constructor

Need to initialise the Cloud on demand, as the hass object is not
yet available in the config flow constructor.

Cache and reuse authentication between instances.

custom_components/tuya_local/cloud.py

@@ -55,6 +55,9 @@ class Cloud:
         self.__hass = hass
         self.__error_code = None
         self.__error_msg = None
+        # Restore cached authentication
+        if cached := self.__hass.data[DOMAIN].get("auth_cache"):
+            self.__authentication = cached
 
     async def async_get_qr_code(self, user_code: str | None = None) -> bool:
         """Get QR code from Tuya server for user code authentication."""
@@ -105,6 +108,7 @@ class Cloud:
                     "refresh_token": info["refresh_token"],
                 },
             }
+            self.__hass.data[DOMAIN]["auth_cache"] = self.__authentication
         else:
             self.__error_code = info.get(TUYA_RESPONSE_CODE, {})
             self.__error_msg = info.get(TUYA_RESPONSE_MSG, "Unknown error")

custom_components/tuya_local/config_flow.py

@@ -54,7 +54,11 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
     def __init__(self) -> None:
         """Initialize the config flow."""
-        self.cloud = Cloud(self.hass)
+        self.cloud = None
+
+    def init_cloud(self):
+        if self.cloud is None:
+            self.cloud = Cloud(self.hass)
 
     async def async_step_user(self, user_input=None):
         errors = {}
@@ -66,6 +70,7 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
 
         if user_input is not None:
             if user_input["setup_mode"] == "cloud":
+                self.init_cloud()
                 try:
                     if self.cloud.is_authenticated:
                         self.__cloud_devices = await self.cloud.async_get_devices()
@@ -101,6 +106,7 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
         """Step user."""
         errors = {}
         placeholders = {}
+        self.init_cloud()
 
         if user_input is not None:
             response = await self.cloud.async_get_qr_code(user_input[CONF_USER_CODE])
@@ -146,7 +152,7 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
                     }
                 ),
             )
-
+        self.init_cloud()
         if not await self.cloud.async_login():
             # Try to get a new QR code on failure
             response = await self.cloud.async_get_qr_code()
@@ -370,6 +376,7 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
                 self.__cloud_device["product_name"],
                 self.__cloud_device["product_id"],
             )
+            self.init_cloud()
             response = self.cloud.async_get_datamodel(self.__cloud_device["device_id"])
             if response and response["result"] and response["result"]["model"]:
                 model = json.loads(response["result"]["model"])