"""
Support for HDMI CEC devices as switches.

For more details about this component, please refer to the documentation at
https://home-assistant.io/components/hdmi_cec/
"""
import logging

from homeassistant.components.hdmi_cec import CecDevice, ATTR_NEW
from homeassistant.components.switch import SwitchDevice, DOMAIN
from homeassistant.const import STATE_OFF, STATE_STANDBY, STATE_ON
from homeassistant.core import HomeAssistant

DEPENDENCIES = ['hdmi_cec']

_LOGGER = logging.getLogger(__name__)

ENTITY_ID_FORMAT = DOMAIN + '.{}'


def setup_platform(hass, config, add_devices, discovery_info=None):
    """Find and return HDMI devices as switches."""
    if ATTR_NEW in discovery_info:
        _LOGGER.info("Setting up HDMI devices %s", discovery_info[ATTR_NEW])
        add_devices(CecSwitchDevice(hass, hass.data.get(device),
                                    hass.data.get(device).logical_address) for
                    device in discovery_info[ATTR_NEW])


class CecSwitchDevice(CecDevice, SwitchDevice):
    """Representation of a HDMI device as a Switch."""

    def __init__(self, hass: HomeAssistant, device, logical):
        """Initialize the HDMI device."""
        CecDevice.__init__(self, hass, device, logical)
        self.entity_id = "%s.%s_%s" % (
            DOMAIN, 'hdmi', hex(self._logical_address)[2:])
        self.update()

    def turn_on(self, **kwargs) -> None:
        """Turn device on."""
        self._device.turn_on()
        self._state = STATE_ON

    def turn_off(self, **kwargs) -> None:
        """Turn device off."""
        self._device.turn_off()
        self._state = STATE_ON

    def toggle(self):
        """Toggle the entity."""
        self._device.toggle()
        if self._state == STATE_ON:
            self._state = STATE_OFF
        else:
            self._state = STATE_ON

    @property
    def is_on(self) -> bool:
        """Return True if entity is on."""
        return self._state == STATE_ON

    @property
    def is_standby(self):
        """Return true if device is in standby."""
        return self._state == STATE_OFF or self._state == STATE_STANDBY

    @property
    def state(self) -> str:
        """Cached state of device."""
        return self._state
