refactor: another refactor

Signed-off-by: Rafal Zielinski <sq4ind@gmail.com>

custom_components/adguard_hub/api.py

@@ -13,22 +13,18 @@ _LOGGER = logging.getLogger(__name__)
 
 class AdGuardHomeError(Exception):
     """Base exception for AdGuard Home API."""
-    pass
 
 
 class AdGuardConnectionError(AdGuardHomeError):
     """Exception for connection errors."""
-    pass
 
 
 class AdGuardAuthError(AdGuardHomeError):
     """Exception for authentication errors."""
-    pass
 
 
 class AdGuardNotFoundError(AdGuardHomeError):
     """Exception for not found errors."""
-    pass
 
 
 class AdGuardHomeAPI:
@@ -43,7 +39,7 @@ class AdGuardHomeAPI:
         ssl: bool = False,
         session: Optional[aiohttp.ClientSession] = None,
         timeout: int = 10,
-    ):
+    ) -> None:
         """Initialize the API wrapper."""
         self.host = host
         self.port = port
@@ -107,11 +103,13 @@ class AdGuardHomeAPI:
                     return {"response": text}
 
         except asyncio.TimeoutError as err:
-            raise AdGuardConnectionError(f"Timeout: {err}")
+            raise AdGuardConnectionError(f"Timeout: {err}") from err
         except ClientError as err:
-            raise AdGuardConnectionError(f"Client error: {err}")
+            raise AdGuardConnectionError(f"Client error: {err}") from err
         except Exception as err:
-            raise AdGuardHomeError(f"Unexpected error: {err}")
+            if isinstance(err, AdGuardHomeError):
+                raise
+            raise AdGuardHomeError(f"Unexpected error: {err}") from err
 
     async def test_connection(self) -> bool:
         """Test the connection to AdGuard Home."""