text: """
  Allow users to set and activate scenes.
  
  For more details about this component, please refer to the documentation at
  https://home-assistant.io/components/scene/
  """
  import asyncio
  from collections import namedtuple
  
  import voluptuous as vol
  
  import homeassistant.helpers.config_validation as cv
  from homeassistant.components.scene import Scene, STATES
  from homeassistant.const import (
      ATTR_ENTITY_ID, ATTR_STATE, CONF_ENTITIES, CONF_NAME, CONF_PLATFORM,
      STATE_OFF, STATE_ON)
  from homeassistant.core import State
  from homeassistant.helpers.state import async_reproduce_state, HASS_DOMAIN
  
  PLATFORM_SCHEMA = vol.Schema({
      vol.Required(CONF_PLATFORM): HASS_DOMAIN,
      vol.Required(STATES): vol.All(
          cv.ensure_list,
          [
              {
                  vol.Required(CONF_NAME): cv.string,
                  vol.Required(CONF_ENTITIES): {
                      cv.entity_id: vol.Any(str, bool, dict)
                  },
              }
          ]
      ),
  }, extra=vol.ALLOW_EXTRA)
  
  SCENECONFIG = namedtuple('SceneConfig', [CONF_NAME, STATES])
  
  
  @asyncio.coroutine
  def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
      """Set up home assistant scene entries."""
      scene_config = config.get(STATES)
  
      async_add_devices(HomeAssistantScene(
          hass, _process_config(scene)) for scene in scene_config)
      return True
  
  
  def _process_config(scene_config):
      """Process passed in config into a format to work with.
  
      Async friendly.
      """
      name = scene_config.get(CONF_NAME)
  
      states = {}
      c_entities = dict(scene_config.get(CONF_ENTITIES, {}))
  
      for entity_id in c_entities:
          if isinstance(c_entities[entity_id], dict):
              entity_attrs = c_entities[entity_id].copy()
              state = entity_attrs.pop(ATTR_STATE, None)
              attributes = entity_attrs
          else:
              state = c_entities[entity_id]
              attributes = {}
  
          # YAML translates 'on' to a boolean
          # http://yaml.org/type/bool.html
          if isinstance(state, bool):
              state = STATE_ON if state else STATE_OFF
          else:
              state = str(state)
  
          states[entity_id.lower()] = State(entity_id, state, attributes)
  
      return SCENECONFIG(name, states)
  
  
  class HomeAssistantScene(Scene):
      """A scene is a group of entities and the states we want them to be."""
  
      def __init__(self, hass, scene_config):
          """Initialize the scene."""
          self.hass = hass
          self.scene_config = scene_config
  
      @property
      def name(self):
          """Return the name of the scene."""
          return self.scene_config.name
  
      @property
      def device_state_attributes(self):
          """Return the scene state attributes."""
          return {
              ATTR_ENTITY_ID: list(self.scene_config.states.keys()),
          }
  
      @asyncio.coroutine
      def async_activate(self):
          """Activate scene. Try to get entities into requested state."""
          yield from async_reproduce_state(
              self.hass, self.scene_config.states.values(), True)
  