text: """Config flow to configure Motion Blinds using their WLAN API."""
  from motionblinds import MotionDiscovery
  import voluptuous as vol
  
  from homeassistant import config_entries
  from homeassistant.const import CONF_API_KEY, CONF_HOST
  
  # pylint: disable=unused-import
  from .const import DEFAULT_GATEWAY_NAME, DOMAIN
  from .gateway import ConnectMotionGateway
  
  CONFIG_SCHEMA = vol.Schema(
      {
          vol.Optional(CONF_HOST): str,
      }
  )
  
  CONFIG_SETTINGS = vol.Schema(
      {
          vol.Required(CONF_API_KEY): vol.All(str, vol.Length(min=16, max=16)),
      }
  )
  
  
  class MotionBlindsFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
      """Handle a Motion Blinds config flow."""
  
      VERSION = 1
      CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_PUSH
  
      def __init__(self):
          """Initialize the Motion Blinds flow."""
          self._host = None
          self._ips = []
  
      async def async_step_user(self, user_input=None):
          """Handle a flow initialized by the user."""
          errors = {}
          if user_input is not None:
              self._host = user_input.get(CONF_HOST)
  
              if self._host is not None:
                  return await self.async_step_connect()
  
              # Use MotionGateway discovery
              discover_class = MotionDiscovery()
              gateways = await self.hass.async_add_executor_job(discover_class.discover)
              self._ips = list(gateways)
  
              if len(self._ips) == 1:
                  self._host = self._ips[0]
                  return await self.async_step_connect()
  
              if len(self._ips) > 1:
                  return await self.async_step_select()
  
              errors["base"] = "discovery_error"
  
          return self.async_show_form(
              step_id="user", data_schema=CONFIG_SCHEMA, errors=errors
          )
  
      async def async_step_select(self, user_input=None):
          """Handle multiple motion gateways found."""
          if user_input is not None:
              self._host = user_input["select_ip"]
              return await self.async_step_connect()
  
          select_schema = vol.Schema({vol.Required("select_ip"): vol.In(self._ips)})
  
          return self.async_show_form(step_id="select", data_schema=select_schema)
  
      async def async_step_connect(self, user_input=None):
          """Connect to the Motion Gateway."""
          if user_input is not None:
              key = user_input[CONF_API_KEY]
  
              connect_gateway_class = ConnectMotionGateway(self.hass, multicast=None)
              if not await connect_gateway_class.async_connect_gateway(self._host, key):
                  return self.async_abort(reason="connection_error")
              motion_gateway = connect_gateway_class.gateway_device
  
              mac_address = motion_gateway.mac
  
              await self.async_set_unique_id(mac_address)
              self._abort_if_unique_id_configured()
  
              return self.async_create_entry(
                  title=DEFAULT_GATEWAY_NAME,
                  data={CONF_HOST: self._host, CONF_API_KEY: key},
              )
  
          return self.async_show_form(step_id="connect", data_schema=CONFIG_SETTINGS)
  