husqvarna_automower_ble: Report mower not pairable just before connection

Only report that the mower isn't pairable just before we try to connect
to it.

Resolves: #156482
Signed-off-by: Alistair Francis <alistair@alistair23.me>

Author: alistair23

homeassistant/components/husqvarna_automower_ble/config_flow.py

@@ -37,43 +37,6 @@
 REAUTH_SCHEMA = BLUETOOTH_SCHEMA
 
 
-def _is_supported(discovery_info: BluetoothServiceInfo):
-    """Check if device is supported."""
-    if ScanService not in discovery_info.service_uuids:
-        LOGGER.debug(
-            "Unsupported device, missing service %s: %s", ScanService, discovery_info
-        )
-        return False
-
-    if not (data := discovery_info.manufacturer_data.get(ManufacturerData.company)):
-        LOGGER.debug(
-            "Unsupported device, missing manufacturer data %s: %s",
-            ManufacturerData.company,
-            discovery_info,
-        )
-        return False
-
-    manufacturer_data = ManufacturerData.decode(data)
-    product_type = ProductType.from_manufacturer_data(manufacturer_data)
-
-    # Some mowers only expose the serial number in the manufacturer data
-    # and not the product type, so we allow None here as well.
-    if product_type not in (ProductType.MOWER, ProductType.UNKNOWN):
-        LOGGER.debug("Unsupported device: %s (%s)", manufacturer_data, discovery_info)
-        return False
-
-    if not manufacturer_data.pairable:
-        LOGGER.error(
-            "The mower does not appear to be pairable. "
-            "Ensure the mower is in pairing mode before continuing. "
-            "If the mower isn't pariable you will receive authentication "
-            "errors and be unable to connect"
-        )
-
-    LOGGER.debug("Supported device: %s", manufacturer_data)
-    return True
-
-
 def _pin_valid(pin: str) -> bool:
     """Check if the pin is valid."""
     try:
@@ -91,14 +54,49 @@ class HusqvarnaAutomowerBleConfigFlow(ConfigFlow, domain=DOMAIN):
     address: str | None = None
     mower_name: str = ""
     pin: str | None = None
+    pairable: bool = True
+
+    def _is_supported(self, discovery_info: BluetoothServiceInfo):
+        """Check if device is supported."""
+        if ScanService not in discovery_info.service_uuids:
+            LOGGER.debug(
+                "Unsupported device, missing service %s: %s",
+                ScanService,
+                discovery_info,
+            )
+            return False
+
+        if not (data := discovery_info.manufacturer_data.get(ManufacturerData.company)):
+            LOGGER.debug(
+                "Unsupported device, missing manufacturer data %s: %s",
+                ManufacturerData.company,
+                discovery_info,
+            )
+            return False
+
+        manufacturer_data = ManufacturerData.decode(data)
+        product_type = ProductType.from_manufacturer_data(manufacturer_data)
+
+        # Some mowers only expose the serial number in the manufacturer data
+        # and not the product type, so we allow UNKNOWN here as well.
+        if product_type not in (ProductType.MOWER, ProductType.UNKNOWN):
+            LOGGER.debug(
+                "Unsupported device: %s (%s)", manufacturer_data, discovery_info
+            )
+            return False
+
+        self.pairable = manufacturer_data.pairable
+
+        LOGGER.debug("Supported device: %s", manufacturer_data)
+        return True
 
     async def async_step_bluetooth(
         self, discovery_info: BluetoothServiceInfo
     ) -> ConfigFlowResult:
         """Handle the bluetooth discovery step."""
 
         LOGGER.debug("Discovered device: %s", discovery_info)
-        if not _is_supported(discovery_info):
+        if not self._is_supported(discovery_info):
             return self.async_abort(reason="no_devices_found")
 
         self.context["title_placeholders"] = {
@@ -117,6 +115,14 @@ async def async_step_bluetooth_confirm(
         assert self.address
         errors: dict[str, str] = {}
 
+        if not self.pairable:
+            LOGGER.error(
+                "The mower does not appear to be pairable. "
+                "Ensure the mower is in pairing mode before continuing. "
+                "If the mower isn't pairable you will receive authentication "
+                "errors and be unable to connect"
+            )
+
         if user_input is not None:
             if not _pin_valid(user_input[CONF_PIN]):
                 errors["base"] = "invalid_pin"