text: """Config flow to configure the Freebox integration."""
  import logging
  
  from freebox_api.exceptions import AuthorizationError, HttpRequestError
  import voluptuous as vol
  
  from homeassistant import config_entries
  from homeassistant.const import CONF_HOST, CONF_PORT
  
  from .const import DOMAIN  # pylint: disable=unused-import
  from .router import get_api
  
  _LOGGER = logging.getLogger(__name__)
  
  
  class FreeboxFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
      """Handle a config flow."""
  
      VERSION = 1
      CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
  
      def __init__(self):
          """Initialize Freebox config flow."""
          self._host = None
          self._port = None
  
      def _show_setup_form(self, user_input=None, errors=None):
          """Show the setup form to the user."""
  
          if user_input is None:
              user_input = {}
  
          return self.async_show_form(
              step_id="user",
              data_schema=vol.Schema(
                  {
                      vol.Required(CONF_HOST, default=user_input.get(CONF_HOST, "")): str,
                      vol.Required(CONF_PORT, default=user_input.get(CONF_PORT, "")): int,
                  }
              ),
              errors=errors or {},
          )
  
      async def async_step_user(self, user_input=None):
          """Handle a flow initiated by the user."""
          errors = {}
  
          if user_input is None:
              return self._show_setup_form(user_input, errors)
  
          self._host = user_input[CONF_HOST]
          self._port = user_input[CONF_PORT]
  
          # Check if already configured
          await self.async_set_unique_id(self._host)
          self._abort_if_unique_id_configured()
  
          return await self.async_step_link()
  
      async def async_step_link(self, user_input=None):
          """Attempt to link with the Freebox router.
  
          Given a configured host, will ask the user to press the button
          to connect to the router.
          """
          if user_input is None:
              return self.async_show_form(step_id="link")
  
          errors = {}
  
          fbx = await get_api(self.hass, self._host)
          try:
              # Open connection and check authentication
              await fbx.open(self._host, self._port)
  
              # Check permissions
              await fbx.system.get_config()
              await fbx.lan.get_hosts_list()
              await self.hass.async_block_till_done()
  
              # Close connection
              await fbx.close()
  
              return self.async_create_entry(
                  title=self._host,
                  data={CONF_HOST: self._host, CONF_PORT: self._port},
              )
  
          except AuthorizationError as error:
              _LOGGER.error(error)
              errors["base"] = "register_failed"
  
          except HttpRequestError:
              _LOGGER.error("Error connecting to the Freebox router at %s", self._host)
              errors["base"] = "cannot_connect"
  
          except Exception:  # pylint: disable=broad-except
              _LOGGER.exception(
                  "Unknown error connecting with Freebox router at %s", self._host
              )
              errors["base"] = "unknown"
  
          return self.async_show_form(step_id="link", errors=errors)
  
      async def async_step_import(self, user_input=None):
          """Import a config entry."""
          return await self.async_step_user(user_input)
  
      async def async_step_discovery(self, discovery_info):
          """Initialize step from discovery."""
          return await self.async_step_user(discovery_info)
  