text: """Component for interacting with a Lutron RadioRA 2 system."""
  import logging
  
  from pylutron import Button, Lutron
  import voluptuous as vol
  
  from homeassistant.const import ATTR_ID, CONF_HOST, CONF_PASSWORD, CONF_USERNAME
  from homeassistant.helpers import discovery
  import homeassistant.helpers.config_validation as cv
  from homeassistant.helpers.entity import Entity
  from homeassistant.util import slugify
  
  DOMAIN = "lutron"
  
  _LOGGER = logging.getLogger(__name__)
  
  LUTRON_BUTTONS = "lutron_buttons"
  LUTRON_CONTROLLER = "lutron_controller"
  LUTRON_DEVICES = "lutron_devices"
  
  # Attribute on events that indicates what action was taken with the button.
  ATTR_ACTION = "action"
  ATTR_FULL_ID = "full_id"
  
  CONFIG_SCHEMA = vol.Schema(
      {
          DOMAIN: vol.Schema(
              {
                  vol.Required(CONF_HOST): cv.string,
                  vol.Required(CONF_PASSWORD): cv.string,
                  vol.Required(CONF_USERNAME): cv.string,
              }
          )
      },
      extra=vol.ALLOW_EXTRA,
  )
  
  
  def setup(hass, base_config):
      """Set up the Lutron component."""
      hass.data[LUTRON_BUTTONS] = []
      hass.data[LUTRON_CONTROLLER] = None
      hass.data[LUTRON_DEVICES] = {
          "light": [],
          "cover": [],
          "switch": [],
          "scene": [],
          "binary_sensor": [],
      }
  
      config = base_config.get(DOMAIN)
      hass.data[LUTRON_CONTROLLER] = Lutron(
          config[CONF_HOST], config[CONF_USERNAME], config[CONF_PASSWORD]
      )
  
      hass.data[LUTRON_CONTROLLER].load_xml_db()
      hass.data[LUTRON_CONTROLLER].connect()
      _LOGGER.info("Connected to main repeater at %s", config[CONF_HOST])
  
      # Sort our devices into types
      for area in hass.data[LUTRON_CONTROLLER].areas:
          for output in area.outputs:
              if output.type == "SYSTEM_SHADE":
                  hass.data[LUTRON_DEVICES]["cover"].append((area.name, output))
              elif output.is_dimmable:
                  hass.data[LUTRON_DEVICES]["light"].append((area.name, output))
              else:
                  hass.data[LUTRON_DEVICES]["switch"].append((area.name, output))
          for keypad in area.keypads:
              for button in keypad.buttons:
                  # If the button has a function assigned to it, add it as a scene
                  if button.name != "Unknown Button" and button.button_type in (
                      "SingleAction",
                      "Toggle",
                      "SingleSceneRaiseLower",
                      "MasterRaiseLower",
                  ):
                      # Associate an LED with a button if there is one
                      led = next(
                          (led for led in keypad.leds if led.number == button.number),
                          None,
                      )
                      hass.data[LUTRON_DEVICES]["scene"].append(
                          (area.name, keypad.name, button, led)
                      )
  
                  hass.data[LUTRON_BUTTONS].append(
                      LutronButton(hass, area.name, keypad, button)
                  )
          if area.occupancy_group is not None:
              hass.data[LUTRON_DEVICES]["binary_sensor"].append(
                  (area.name, area.occupancy_group)
              )
  
      for component in ("light", "cover", "switch", "scene", "binary_sensor"):
          discovery.load_platform(hass, component, DOMAIN, {}, base_config)
      return True
  
  
  class LutronDevice(Entity):
      """Representation of a Lutron device entity."""
  
      def __init__(self, area_name, lutron_device, controller):
          """Initialize the device."""
          self._lutron_device = lutron_device
          self._controller = controller
          self._area_name = area_name
  
      async def async_added_to_hass(self):
          """Register callbacks."""
          self.hass.async_add_executor_job(
              self._lutron_device.subscribe, self._update_callback, None
          )
  
      def _update_callback(self, _device, _context, _event, _params):
          """Run when invoked by pylutron when the device state changes."""
          self.schedule_update_ha_state()
  
      @property
      def name(self):
          """Return the name of the device."""
          return f"{self._area_name} {self._lutron_device.name}"
  
      @property
      def should_poll(self):
          """No polling needed."""
          return False
  
  
  class LutronButton:
      """Representation of a button on a Lutron keypad.
  
      This is responsible for firing events as keypad buttons are pressed
      (and possibly released, depending on the button type). It is not
      represented as an entity; it simply fires events.
      """
  
      def __init__(self, hass, area_name, keypad, button):
          """Register callback for activity on the button."""
          name = f"{keypad.name}: {button.name}"
          self._hass = hass
          self._has_release_event = (
              button.button_type is not None and "RaiseLower" in button.button_type
          )
          self._id = slugify(name)
          self._keypad = keypad
          self._area_name = area_name
          self._button_name = button.name
          self._button = button
          self._event = "lutron_event"
          self._full_id = slugify(f"{area_name} {keypad.name}: {button.name}")
  
          button.subscribe(self.button_callback, None)
  
      def button_callback(self, button, context, event, params):
          """Fire an event about a button being pressed or released."""
          # Events per button type:
          #   RaiseLower -> pressed/released
          #   SingleAction -> single
          action = None
          if self._has_release_event:
              if event == Button.Event.PRESSED:
                  action = "pressed"
              else:
                  action = "released"
          elif event == Button.Event.PRESSED:
              action = "single"
  
          if action:
              data = {ATTR_ID: self._id, ATTR_ACTION: action, ATTR_FULL_ID: self._full_id}
              self._hass.bus.fire(self._event, data)
  