"""Support for WeMo binary sensors."""
import asyncio
import logging

from homeassistant.components.binary_sensor import BinarySensorEntity
from homeassistant.helpers.dispatcher import async_dispatcher_connect

from .const import DOMAIN as WEMO_DOMAIN
from .entity import WemoEntity

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up WeMo binary sensors."""

    async def _discovered_wemo(coordinator):
        """Handle a discovered Wemo device."""
        async_add_entities([WemoBinarySensor(coordinator)])

    async_dispatcher_connect(hass, f"{WEMO_DOMAIN}.binary_sensor", _discovered_wemo)

    await asyncio.gather(
        *(
            _discovered_wemo(coordinator)
            for coordinator in hass.data[WEMO_DOMAIN]["pending"].pop("binary_sensor")
        )
    )


class WemoBinarySensor(WemoEntity, BinarySensorEntity):
    """Representation a WeMo binary sensor."""

    @property
    def is_on(self) -> bool:
        """Return true if the state is on. Standby is on."""
        return self.wemo.get_state()