text: """Lights on Zigbee Home Automation networks."""
  from datetime import timedelta
  import logging
  
  from zigpy.zcl.foundation import Status
  from homeassistant.components import light
  from homeassistant.const import STATE_ON
  from homeassistant.core import callback
  from homeassistant.helpers.dispatcher import async_dispatcher_connect
  from homeassistant.helpers.event import async_track_time_interval
  import homeassistant.util.color as color_util
  from .core.const import (
      DATA_ZHA, DATA_ZHA_DISPATCHERS, ZHA_DISCOVERY_NEW, COLOR_CHANNEL,
      ON_OFF_CHANNEL, LEVEL_CHANNEL, SIGNAL_ATTR_UPDATED, SIGNAL_SET_LEVEL
      )
  from .entity import ZhaEntity
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_DURATION = 5
  
  CAPABILITIES_COLOR_XY = 0x08
  CAPABILITIES_COLOR_TEMP = 0x10
  
  UNSUPPORTED_ATTRIBUTE = 0x86
  SCAN_INTERVAL = timedelta(minutes=60)
  PARALLEL_UPDATES = 5
  
  
  async def async_setup_platform(hass, config, async_add_entities,
                                 discovery_info=None):
      """Old way of setting up Zigbee Home Automation lights."""
      pass
  
  
  async def async_setup_entry(hass, config_entry, async_add_entities):
      """Set up the Zigbee Home Automation light from config entry."""
      async def async_discover(discovery_info):
          await _async_setup_entities(hass, config_entry, async_add_entities,
                                      [discovery_info])
  
      unsub = async_dispatcher_connect(
          hass, ZHA_DISCOVERY_NEW.format(light.DOMAIN), async_discover)
      hass.data[DATA_ZHA][DATA_ZHA_DISPATCHERS].append(unsub)
  
      lights = hass.data.get(DATA_ZHA, {}).get(light.DOMAIN)
      if lights is not None:
          await _async_setup_entities(hass, config_entry, async_add_entities,
                                      lights.values())
          del hass.data[DATA_ZHA][light.DOMAIN]
  
  
  async def _async_setup_entities(hass, config_entry, async_add_entities,
                                  discovery_infos):
      """Set up the ZHA lights."""
      entities = []
      for discovery_info in discovery_infos:
          zha_light = Light(**discovery_info)
          entities.append(zha_light)
  
      async_add_entities(entities, update_before_add=True)
  
  
  class Light(ZhaEntity, light.Light):
      """Representation of a ZHA or ZLL light."""
  
      _domain = light.DOMAIN
  
      def __init__(self, unique_id, zha_device, channels, **kwargs):
          """Initialize the ZHA light."""
          super().__init__(unique_id, zha_device, channels, **kwargs)
          self._supported_features = 0
          self._color_temp = None
          self._hs_color = None
          self._brightness = None
          self._on_off_channel = self.cluster_channels.get(ON_OFF_CHANNEL)
          self._level_channel = self.cluster_channels.get(LEVEL_CHANNEL)
          self._color_channel = self.cluster_channels.get(COLOR_CHANNEL)
  
          if self._level_channel:
              self._supported_features |= light.SUPPORT_BRIGHTNESS
              self._supported_features |= light.SUPPORT_TRANSITION
              self._brightness = 0
  
          if self._color_channel:
              color_capabilities = self._color_channel.get_color_capabilities()
              if color_capabilities & CAPABILITIES_COLOR_TEMP:
                  self._supported_features |= light.SUPPORT_COLOR_TEMP
  
              if color_capabilities & CAPABILITIES_COLOR_XY:
                  self._supported_features |= light.SUPPORT_COLOR
                  self._hs_color = (0, 0)
  
      @property
      def is_on(self) -> bool:
          """Return true if entity is on."""
          if self._state is None:
              return False
          return self._state
  
      @property
      def brightness(self):
          """Return the brightness of this light."""
          return self._brightness
  
      @property
      def device_state_attributes(self):
          """Return state attributes."""
          return self.state_attributes
  
      def set_level(self, value):
          """Set the brightness of this light between 0..254.
  
          brightness level 255 is a special value instructing the device to come
          on at `on_level` Zigbee attribute value, regardless of the last set
          level
          """
          value = max(0, min(254, value))
          self._brightness = value
          self.async_schedule_update_ha_state()
  
      @property
      def hs_color(self):
          """Return the hs color value [int, int]."""
          return self._hs_color
  
      @property
      def color_temp(self):
          """Return the CT color value in mireds."""
          return self._color_temp
  
      @property
      def supported_features(self):
          """Flag supported features."""
          return self._supported_features
  
      def async_set_state(self, state):
          """Set the state."""
          self._state = bool(state)
          self.async_schedule_update_ha_state()
  
      async def async_added_to_hass(self):
          """Run when about to be added to hass."""
          await super().async_added_to_hass()
          await self.async_accept_signal(
              self._on_off_channel, SIGNAL_ATTR_UPDATED, self.async_set_state)
          if self._level_channel:
              await self.async_accept_signal(
                  self._level_channel, SIGNAL_SET_LEVEL, self.set_level)
          async_track_time_interval(self.hass, self.refresh, SCAN_INTERVAL)
  
      @callback
      def async_restore_last_state(self, last_state):
          """Restore previous state."""
          self._state = last_state.state == STATE_ON
          if 'brightness' in last_state.attributes:
              self._brightness = last_state.attributes['brightness']
          if 'color_temp' in last_state.attributes:
              self._color_temp = last_state.attributes['color_temp']
          if 'hs_color' in last_state.attributes:
              self._hs_color = last_state.attributes['hs_color']
  
      async def async_turn_on(self, **kwargs):
          """Turn the entity on."""
          transition = kwargs.get(light.ATTR_TRANSITION)
          duration = transition * 10 if transition else DEFAULT_DURATION
          brightness = kwargs.get(light.ATTR_BRIGHTNESS)
  
          t_log = {}
          if (brightness is not None or transition) and \
                  self._supported_features & light.SUPPORT_BRIGHTNESS:
              if brightness is not None:
                  level = min(254, brightness)
              else:
                  level = self._brightness or 254
              result = await self._level_channel.move_to_level_with_on_off(
                  level,
                  duration
              )
              t_log['move_to_level_with_on_off'] = result
              if not isinstance(result, list) or result[1] is not Status.SUCCESS:
                  self.debug("turned on: %s", t_log)
                  return
              self._state = bool(level)
              if level:
                  self._brightness = level
  
          if brightness is None or brightness:
              result = await self._on_off_channel.on()
              t_log['on_off'] = result
              if not isinstance(result, list) or result[1] is not Status.SUCCESS:
                  self.debug("turned on: %s", t_log)
                  return
              self._state = True
  
          if light.ATTR_COLOR_TEMP in kwargs and \
                  self.supported_features & light.SUPPORT_COLOR_TEMP:
              temperature = kwargs[light.ATTR_COLOR_TEMP]
              result = await self._color_channel.move_to_color_temp(
                  temperature, duration)
              t_log['move_to_color_temp'] = result
              if not isinstance(result, list) or result[1] is not Status.SUCCESS:
                  self.debug("turned on: %s", t_log)
                  return
              self._color_temp = temperature
  
          if light.ATTR_HS_COLOR in kwargs and \
                  self.supported_features & light.SUPPORT_COLOR:
              hs_color = kwargs[light.ATTR_HS_COLOR]
              xy_color = color_util.color_hs_to_xy(*hs_color)
              result = await self._color_channel.move_to_color(
                  int(xy_color[0] * 65535),
                  int(xy_color[1] * 65535),
                  duration,
              )
              t_log['move_to_color'] = result
              if not isinstance(result, list) or result[1] is not Status.SUCCESS:
                  self.debug("turned on: %s", t_log)
                  return
              self._hs_color = hs_color
  
          self.debug("turned on: %s", t_log)
          self.async_schedule_update_ha_state()
  
      async def async_turn_off(self, **kwargs):
          """Turn the entity off."""
          duration = kwargs.get(light.ATTR_TRANSITION)
          supports_level = self.supported_features & light.SUPPORT_BRIGHTNESS
          if duration and supports_level:
              result = await self._level_channel.move_to_level_with_on_off(
                  0,
                  duration*10
              )
          else:
              result = await self._on_off_channel.off()
          self.debug("turned off: %s", result)
          if not isinstance(result, list) or result[1] is not Status.SUCCESS:
              return
          self._state = False
          self.async_schedule_update_ha_state()
  
      async def async_update(self):
          """Attempt to retrieve on off state from the light."""
          await super().async_update()
          await self.async_get_state()
  
      async def async_get_state(self, from_cache=True):
          """Attempt to retrieve on off state from the light."""
          self.debug("polling current state")
          if self._on_off_channel:
              self._state = await self._on_off_channel.get_attribute_value(
                  'on_off', from_cache=from_cache)
          if self._level_channel:
              self._brightness = await self._level_channel.get_attribute_value(
                  'current_level', from_cache=from_cache)
          if self._color_channel:
              color_capabilities = self._color_channel.get_color_capabilities()
              if color_capabilities is not None and\
                      color_capabilities & CAPABILITIES_COLOR_TEMP:
                  self._color_temp = await\
                      self._color_channel.get_attribute_value(
                          'color_temperature', from_cache=from_cache)
              if color_capabilities is not None and\
                      color_capabilities & CAPABILITIES_COLOR_XY:
                  color_x = await self._color_channel.get_attribute_value(
                      'current_x', from_cache=from_cache)
                  color_y = await self._color_channel.get_attribute_value(
                      'current_y', from_cache=from_cache)
                  if color_x is not None and color_y is not None:
                      self._hs_color = color_util.color_xy_to_hs(
                          float(color_x / 65535), float(color_y / 65535))
  
      async def refresh(self, time):
          """Call async_get_state at an interval."""
          await self.async_get_state(from_cache=False)
  