Handle IP address changes properly for tplink (#108731)

* Update device config for SETUP_RETRY and use CONF_HOST on startup

* Make entry state checks use a constant

Co-authored-by: J. Nick Koston <nick@koston.org>

* Update tests

---------

Co-authored-by: J. Nick Koston <nick@koston.org>

homeassistant/components/tplink/__init__.py

@@ -143,6 +143,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
     if not config:
         config = DeviceConfig(host)
+    else:
+        config.host = host
 
     config.timeout = CONNECT_TIMEOUT
     if config.uses_http is True:

homeassistant/components/tplink/config_flow.py

@@ -78,8 +78,11 @@ async def async_step_integration_discovery(
     def _update_config_if_entry_in_setup_error(
         self, entry: ConfigEntry, host: str, config: dict
     ) -> None:
-        """If discovery encounters a device that is in SETUP_ERROR update the device config."""
-        if entry.state is not ConfigEntryState.SETUP_ERROR:
+        """If discovery encounters a device that is in SETUP_ERROR or SETUP_RETRY update the device config."""
+        if entry.state not in (
+            ConfigEntryState.SETUP_ERROR,
+            ConfigEntryState.SETUP_RETRY,
+        ):
             return
         entry_data = entry.data
         entry_config_dict = entry_data.get(CONF_DEVICE_CONFIG)

tests/components/tplink/test_config_flow.py

@@ -10,6 +10,7 @@
     DOMAIN,
     AuthenticationException,
     Credentials,
+    DeviceConfig,
     SmartDeviceException,
 )
 from homeassistant.components.tplink.const import CONF_DEVICE_CONFIG
@@ -36,6 +37,7 @@
     MAC_ADDRESS,
     MAC_ADDRESS2,
     MODULE,
+    _mocked_bulb,
     _patch_connect,
     _patch_discovery,
     _patch_single_discovery,
@@ -736,6 +738,57 @@ async def test_discovered_by_dhcp_or_discovery_failed_to_get_device(
     assert result["reason"] == "cannot_connect"
 
 
+async def test_discovery_with_ip_change(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_discovery: AsyncMock,
+    mock_connect: AsyncMock,
+) -> None:
+    """Test reauth flow."""
+    mock_connect["connect"].side_effect = SmartDeviceException()
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+    assert mock_config_entry.state == config_entries.ConfigEntryState.SETUP_RETRY
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 0
+    assert mock_config_entry.data[CONF_DEVICE_CONFIG] == DEVICE_CONFIG_DICT_LEGACY
+    assert mock_config_entry.data[CONF_DEVICE_CONFIG].get(CONF_HOST) == "127.0.0.1"
+
+    discovery_result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={"source": config_entries.SOURCE_INTEGRATION_DISCOVERY},
+        data={
+            CONF_HOST: "127.0.0.2",
+            CONF_MAC: MAC_ADDRESS,
+            CONF_ALIAS: ALIAS,
+            CONF_DEVICE_CONFIG: DEVICE_CONFIG_DICT_AUTH,
+        },
+    )
+    await hass.async_block_till_done()
+    assert discovery_result["type"] is FlowResultType.ABORT
+    assert discovery_result["reason"] == "already_configured"
+    assert mock_config_entry.data[CONF_DEVICE_CONFIG] == DEVICE_CONFIG_DICT_AUTH
+    assert mock_config_entry.data[CONF_HOST] == "127.0.0.2"
+
+    config = DeviceConfig.from_dict(DEVICE_CONFIG_DICT_AUTH)
+
+    mock_connect["connect"].reset_mock(side_effect=True)
+    bulb = _mocked_bulb(
+        device_config=config,
+        mac=mock_config_entry.unique_id,
+    )
+    mock_connect["connect"].return_value = bulb
+    await hass.config_entries.async_reload(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+    assert mock_config_entry.state == config_entries.ConfigEntryState.LOADED
+    # Check that init set the new host correctly before calling connect
+    assert config.host == "127.0.0.1"
+    config.host = "127.0.0.2"
+    mock_connect["connect"].assert_awaited_once_with(config=config)
+
+
 async def test_reauth(
     hass: HomeAssistant,
     mock_added_config_entry: MockConfigEntry,