light.py

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"""Kuler Sky light platform."""
 
from __future__ import annotations
 
from datetime import timedelta
import logging
from typing import Any
 
import pykulersky
 
from homeassistant.components.light import (
    ATTR_BRIGHTNESS,
    ATTR_RGBW_COLOR,
    ColorMode,
    LightEntity,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import EVENT_HOMEASSISTANT_STOP
from homeassistant.core import HomeAssistant
from homeassistant.helpers.device_registry import DeviceInfo
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.event import async_track_time_interval
 
from .const import DATA_ADDRESSES, DATA_DISCOVERY_SUBSCRIPTION, DOMAIN
 
_LOGGER = logging.getLogger(__name__)
 
DISCOVERY_INTERVAL = timedelta(seconds=60)
 
 
async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up Kuler sky light devices."""
 
    async def discover(*args):
        """Attempt to discover new lights."""
        lights = await pykulersky.discover()
 
        # Filter out already discovered lights
        new_lights = [
            light
            for light in lights
            if light.address not in hass.data[DOMAIN][DATA_ADDRESSES]
        ]
 
        new_entities = []
        for light in new_lights:
            hass.data[DOMAIN][DATA_ADDRESSES].add(light.address)
            new_entities.append(KulerskyLight(light))
 
        async_add_entities(new_entities, update_before_add=True)
 
    # Start initial discovery
    hass.async_create_task(discover())
 
    # Perform recurring discovery of new devices
    hass.data[DOMAIN][DATA_DISCOVERY_SUBSCRIPTION] = async_track_time_interval(
        hass, discover, DISCOVERY_INTERVAL
    )
 
 
class KulerskyLight(LightEntity):
    """Representation of a Kuler Sky Light."""
 
    _attr_has_entity_name = True
    _attr_name = None
    _attr_available = False
    _attr_supported_color_modes = {ColorMode.RGBW}
    _attr_color_mode = ColorMode.RGBW
 
    def __init__(self, light: pykulersky.Light) -> None:
        """Initialize a Kuler Sky light."""
        self._light_light = light
        self._attr_unique_id_attr_unique_id = light.address
        self._attr_device_info_attr_device_info = DeviceInfo(
            identifiers={(DOMAIN, light.address)},
            manufacturer="Brightech",
            name=light.name,
        )
 
    async def async_added_to_hass(self) -> None:
        """Run when entity about to be added to hass."""
        self.async_on_removeasync_on_remove(
            self.hasshass.bus.async_listen_once(
                EVENT_HOMEASSISTANT_STOP, self.async_will_remove_from_hassasync_will_remove_from_hassasync_will_remove_from_hass
            )
        )
 
    async def async_will_remove_from_hass(self, *args) -> None:
        """Run when entity will be removed from hass."""
        try:
            await self._light_light.disconnect()
        except pykulersky.PykulerskyException:
            _LOGGER.debug(
                "Exception disconnected from %s", self._light_light.address, exc_info=True
            )
 
    @property
    def is_on(self):
        """Return true if light is on."""
        return self.brightnessbrightness > 0
 
    async def async_turn_on(self, **kwargs: Any) -> None:
        """Instruct the light to turn on."""
        default_rgbw = (255,) * 4 if self.rgbw_colorrgbw_color is None else self.rgbw_colorrgbw_color
        rgbw = kwargs.get(ATTR_RGBW_COLOR, default_rgbw)
 
        default_brightness = 0 if self.brightnessbrightness is None else self.brightnessbrightness
        brightness = kwargs.get(ATTR_BRIGHTNESS, default_brightness)
 
        if brightness == 0 and not kwargs:
            # If the light would be off, and no additional parameters were
            # passed, just turn the light on full brightness.
            brightness = 255
            rgbw = (255,) * 4
 
        rgbw_scaled = [round(x * brightness / 255) for x in rgbw]
 
        await self._light_light.set_color(*rgbw_scaled)
 
    async def async_turn_off(self, **kwargs: Any) -> None:
        """Instruct the light to turn off."""
        await self._light_light.set_color(0, 0, 0, 0)
 
    async def async_update(self) -> None:
        """Fetch new state data for this light."""
        try:
            if not self._attr_available_attr_available_attr_available:
                await self._light_light.connect()
            rgbw = await self._light_light.get_color()
        except pykulersky.PykulerskyException as exc:
            if self._attr_available_attr_available_attr_available:
                _LOGGER.warning("Unable to connect to %s: %s", self._light_light.address, exc)
            self._attr_available_attr_available_attr_available = False
            return
        if self._attr_available_attr_available_attr_available is False:
            _LOGGER.warning("Reconnected to %s", self._light_light.address)
 
        self._attr_available_attr_available_attr_available = True
        brightness = max(rgbw)
        if not brightness:
            self._attr_rgbw_color_attr_rgbw_color = (0, 0, 0, 0)
        else:
            rgbw_normalized = [round(x * 255 / brightness) for x in rgbw]
            self._attr_rgbw_color_attr_rgbw_color = (
                rgbw_normalized[0],
                rgbw_normalized[1],
                rgbw_normalized[2],
                rgbw_normalized[3],
            )
        self._attr_brightness_attr_brightness = brightness