Add config option to set timeout for wiffi devices (#35694)

* add config option to set timeout for wiffi devices

Wiffi devices allow to configure the update period (=
full_loop_minutes). The integration shall respect the configured update
period and therefore need a configuration for the timeout, too.

* Move timeout from config flow to option flow

* add test for option flow

homeassistant/components/wiffi/config_flow.py

@@ -8,10 +8,14 @@ import voluptuous as vol
 from wiffi import WiffiTcpServer
 
 from homeassistant import config_entries
-from homeassistant.const import CONF_PORT
+from homeassistant.const import CONF_PORT, CONF_TIMEOUT
 from homeassistant.core import callback
 
-from .const import DEFAULT_PORT, DOMAIN  # pylint: disable=unused-import
+from .const import (  # pylint: disable=unused-import
+    DEFAULT_PORT,
+    DEFAULT_TIMEOUT,
+    DOMAIN,
+)
 
 
 class WiffiFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
@@ -20,6 +24,12 @@ class WiffiFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 1
     CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_PUSH
 
+    @staticmethod
+    @callback
+    def async_get_options_flow(config_entry):
+        """Create Wiffi server setup option flow."""
+        return OptionsFlowHandler(config_entry)
+
     async def async_step_user(self, user_input=None):
         """Handle the start of the config flow.
 
@@ -55,3 +65,30 @@ class WiffiFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
         return self.async_show_form(
             step_id="user", data_schema=vol.Schema(data_schema), errors=errors or {}
         )
+
+
+class OptionsFlowHandler(config_entries.OptionsFlow):
+    """Wiffi server setup option flow."""
+
+    def __init__(self, config_entry):
+        """Initialize options flow."""
+        self.config_entry = config_entry
+
+    async def async_step_init(self, user_input=None):
+        """Manage the options."""
+        if user_input is not None:
+            return self.async_create_entry(title="", data=user_input)
+
+        return self.async_show_form(
+            step_id="init",
+            data_schema=vol.Schema(
+                {
+                    vol.Optional(
+                        CONF_TIMEOUT,
+                        default=self.config_entry.options.get(
+                            CONF_TIMEOUT, DEFAULT_TIMEOUT
+                        ),
+                    ): int,
+                }
+            ),
+        )