"""
Support for deCONZ switches.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/switch.deconz/
"""
from homeassistant.components.switch import SwitchDevice
from homeassistant.core import callback
from homeassistant.helpers.dispatcher import async_dispatcher_connect

from .const import DOMAIN as DECONZ_DOMAIN, POWER_PLUGS, SIRENS
from .deconz_device import DeconzDevice


DEPENDENCIES = ['deconz']


async def async_setup_platform(hass, config, async_add_entities,
                               discovery_info=None):
    """Old way of setting up deCONZ switches."""
    pass


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up switches for deCONZ component.

    Switches are based same device class as lights in deCONZ.
    """
    gateway = hass.data[DECONZ_DOMAIN]

    @callback
    def async_add_switch(lights):
        """Add switch from deCONZ."""
        entities = []
        for light in lights:
            if light.type in POWER_PLUGS:
                entities.append(DeconzPowerPlug(light, gateway))
            elif light.type in SIRENS:
                entities.append(DeconzSiren(light, gateway))
        async_add_entities(entities, True)

    gateway.listeners.append(
        async_dispatcher_connect(hass, 'deconz_new_light', async_add_switch))

    async_add_switch(gateway.api.lights.values())


class DeconzPowerPlug(DeconzDevice, SwitchDevice):
    """Representation of a deCONZ power plug."""

    @property
    def is_on(self):
        """Return true if switch is on."""
        return self._device.state

    async def async_turn_on(self, **kwargs):
        """Turn on switch."""
        data = {'on': True}
        await self._device.async_set_state(data)

    async def async_turn_off(self, **kwargs):
        """Turn off switch."""
        data = {'on': False}
        await self._device.async_set_state(data)


class DeconzSiren(DeconzDevice, SwitchDevice):
    """Representation of a deCONZ siren."""

    @property
    def is_on(self):
        """Return true if switch is on."""
        return self._device.alert == 'lselect'

    async def async_turn_on(self, **kwargs):
        """Turn on switch."""
        data = {'alert': 'lselect'}
        await self._device.async_set_state(data)

    async def async_turn_off(self, **kwargs):
        """Turn off switch."""
        data = {'alert': 'none'}
        await self._device.async_set_state(data)