text: """Support for WeMo switches."""
  from __future__ import annotations
  
  import asyncio
  from datetime import datetime, timedelta
  from typing import Any, cast
  
  from pywemo import CoffeeMaker, Insight, Maker
  
  from homeassistant.components.switch import SwitchEntity
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.const import STATE_OFF, STATE_ON, STATE_STANDBY, STATE_UNKNOWN
  from homeassistant.core import HomeAssistant
  from homeassistant.helpers.dispatcher import async_dispatcher_connect
  from homeassistant.helpers.entity_platform import AddEntitiesCallback
  from homeassistant.util import convert
  
  from .const import DOMAIN as WEMO_DOMAIN
  from .entity import WemoBinaryStateEntity
  from .wemo_device import DeviceCoordinator
  
  SCAN_INTERVAL = timedelta(seconds=10)
  PARALLEL_UPDATES = 0
  
  # The WEMO_ constants below come from pywemo itself
  ATTR_SENSOR_STATE = "sensor_state"
  ATTR_SWITCH_MODE = "switch_mode"
  ATTR_CURRENT_STATE_DETAIL = "state_detail"
  ATTR_COFFEMAKER_MODE = "coffeemaker_mode"
  
  MAKER_SWITCH_MOMENTARY = "momentary"
  MAKER_SWITCH_TOGGLE = "toggle"
  
  WEMO_ON = 1
  WEMO_OFF = 0
  WEMO_STANDBY = 8
  
  
  async def async_setup_entry(
      hass: HomeAssistant,
      config_entry: ConfigEntry,
      async_add_entities: AddEntitiesCallback,
  ) -> None:
      """Set up WeMo switches."""
  
      async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
          """Handle a discovered Wemo device."""
          async_add_entities([WemoSwitch(coordinator)])
  
      async_dispatcher_connect(hass, f"{WEMO_DOMAIN}.switch", _discovered_wemo)
  
      await asyncio.gather(
          *(
              _discovered_wemo(coordinator)
              for coordinator in hass.data[WEMO_DOMAIN]["pending"].pop("switch")
          )
      )
  
  
  class WemoSwitch(WemoBinaryStateEntity, SwitchEntity):
      """Representation of a WeMo switch."""
  
      @property
      def extra_state_attributes(self) -> dict[str, Any]:
          """Return the state attributes of the device."""
          attr: dict[str, Any] = {}
          if isinstance(self.wemo, Maker):
              # Is the maker sensor on or off.
              if self.wemo.maker_params["hassensor"]:
                  # Note a state of 1 matches the WeMo app 'not triggered'!
                  if self.wemo.maker_params["sensorstate"]:
                      attr[ATTR_SENSOR_STATE] = STATE_OFF
                  else:
                      attr[ATTR_SENSOR_STATE] = STATE_ON
  
              # Is the maker switch configured as toggle(0) or momentary (1).
              if self.wemo.maker_params["switchmode"]:
                  attr[ATTR_SWITCH_MODE] = MAKER_SWITCH_MOMENTARY
              else:
                  attr[ATTR_SWITCH_MODE] = MAKER_SWITCH_TOGGLE
  
          if isinstance(self.wemo, (Insight, CoffeeMaker)):
              attr[ATTR_CURRENT_STATE_DETAIL] = self.detail_state
  
          if isinstance(self.wemo, Insight):
              attr["on_latest_time"] = WemoSwitch.as_uptime(
                  self.wemo.insight_params.get("onfor", 0)
              )
              attr["on_today_time"] = WemoSwitch.as_uptime(
                  self.wemo.insight_params.get("ontoday", 0)
              )
              attr["on_total_time"] = WemoSwitch.as_uptime(
                  self.wemo.insight_params.get("ontotal", 0)
              )
              threshold = convert(
                  self.wemo.insight_params.get("powerthreshold"), float, 0.0
              )
              assert isinstance(threshold, float)
              attr["power_threshold_w"] = threshold / 1000.0
  
          if isinstance(self.wemo, CoffeeMaker):
              attr[ATTR_COFFEMAKER_MODE] = self.wemo.mode
  
          return attr
  
      @staticmethod
      def as_uptime(_seconds: int) -> str:
          """Format seconds into uptime string in the format: 00d 00h 00m 00s."""
          uptime = datetime(1, 1, 1) + timedelta(seconds=_seconds)
          return "{:0>2d}d {:0>2d}h {:0>2d}m {:0>2d}s".format(
              uptime.day - 1, uptime.hour, uptime.minute, uptime.second
          )
  
      @property
      def current_power_w(self) -> float | None:
          """Return the current power usage in W."""
          if not isinstance(self.wemo, Insight):
              return None
          milliwatts = convert(self.wemo.insight_params.get("currentpower"), float, 0.0)
          assert isinstance(milliwatts, float)
          return milliwatts / 1000.0
  
      @property
      def today_energy_kwh(self) -> float | None:
          """Return the today total energy usage in kWh."""
          if not isinstance(self.wemo, Insight):
              return None
          milliwatt_seconds = convert(self.wemo.insight_params.get("todaymw"), float, 0.0)
          assert isinstance(milliwatt_seconds, float)
          return round(milliwatt_seconds / (1000.0 * 1000.0 * 60), 2)
  
      @property
      def detail_state(self) -> str:
          """Return the state of the device."""
          if isinstance(self.wemo, CoffeeMaker):
              return cast(str, self.wemo.mode_string)
          if isinstance(self.wemo, Insight):
              standby_state = int(self.wemo.insight_params.get("state", 0))
              if standby_state == WEMO_ON:
                  return STATE_ON
              if standby_state == WEMO_OFF:
                  return STATE_OFF
              if standby_state == WEMO_STANDBY:
                  return STATE_STANDBY
              return STATE_UNKNOWN
          assert False  # Unreachable code statement.
  
      @property
      def icon(self) -> str | None:
          """Return the icon of device based on its type."""
          if isinstance(self.wemo, CoffeeMaker):
              return "mdi:coffee"
          return None
  
      def turn_on(self, **kwargs: Any) -> None:
          """Turn the switch on."""
          with self._wemo_exception_handler("turn on"):
              self.wemo.on()
  
          self.schedule_update_ha_state()
  
      def turn_off(self, **kwargs: Any) -> None:
          """Turn the switch off."""
          with self._wemo_exception_handler("turn off"):
              self.wemo.off()
  
          self.schedule_update_ha_state()
  