"""Support for MQTT lights."""
import logging

import voluptuous as vol

from homeassistant.components import mqtt
from homeassistant.components.light import (
    ATTR_BRIGHTNESS,
    ATTR_COLOR_TEMP,
    ATTR_EFFECT,
    ATTR_HS_COLOR,
    ATTR_WHITE_VALUE,
    SUPPORT_BRIGHTNESS,
    SUPPORT_COLOR,
    SUPPORT_COLOR_TEMP,
    SUPPORT_EFFECT,
    SUPPORT_WHITE_VALUE,
    LightEntity,
)
from homeassistant.components.mqtt import (
    CONF_COMMAND_TOPIC,
    CONF_QOS,
    CONF_RETAIN,
    CONF_STATE_TOPIC,
    CONF_UNIQUE_ID,
    MqttAttributes,
    MqttAvailability,
    MqttDiscoveryUpdate,
    MqttEntityDeviceInfo,
    subscription,
)
from homeassistant.const import (
    CONF_BRIGHTNESS,
    CONF_COLOR_TEMP,
    CONF_DEVICE,
    CONF_EFFECT,
    CONF_HS,
    CONF_NAME,
    CONF_OPTIMISTIC,
    CONF_PAYLOAD_OFF,
    CONF_PAYLOAD_ON,
    CONF_RGB,
    CONF_STATE,
    CONF_VALUE_TEMPLATE,
    CONF_WHITE_VALUE,
    CONF_XY,
    STATE_ON,
)
from homeassistant.core import callback
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.restore_state import RestoreEntity
import homeassistant.util.color as color_util

from ..debug_info import log_messages
from .schema import MQTT_LIGHT_SCHEMA_SCHEMA

_LOGGER = logging.getLogger(__name__)

CONF_BRIGHTNESS_COMMAND_TOPIC = "brightness_command_topic"
CONF_BRIGHTNESS_SCALE = "brightness_scale"
CONF_BRIGHTNESS_STATE_TOPIC = "brightness_state_topic"
CONF_BRIGHTNESS_VALUE_TEMPLATE = "brightness_value_template"
CONF_COLOR_TEMP_COMMAND_TEMPLATE = "color_temp_command_template"
CONF_COLOR_TEMP_COMMAND_TOPIC = "color_temp_command_topic"
CONF_COLOR_TEMP_STATE_TOPIC = "color_temp_state_topic"
CONF_COLOR_TEMP_VALUE_TEMPLATE = "color_temp_value_template"
CONF_EFFECT_COMMAND_TOPIC = "effect_command_topic"
CONF_EFFECT_LIST = "effect_list"
CONF_EFFECT_STATE_TOPIC = "effect_state_topic"
CONF_EFFECT_VALUE_TEMPLATE = "effect_value_template"
CONF_HS_COMMAND_TOPIC = "hs_command_topic"
CONF_HS_STATE_TOPIC = "hs_state_topic"
CONF_HS_VALUE_TEMPLATE = "hs_value_template"
CONF_MAX_MIREDS = "max_mireds"
CONF_MIN_MIREDS = "min_mireds"
CONF_RGB_COMMAND_TEMPLATE = "rgb_command_template"
CONF_RGB_COMMAND_TOPIC = "rgb_command_topic"
CONF_RGB_STATE_TOPIC = "rgb_state_topic"
CONF_RGB_VALUE_TEMPLATE = "rgb_value_template"
CONF_STATE_VALUE_TEMPLATE = "state_value_template"
CONF_XY_COMMAND_TOPIC = "xy_command_topic"
CONF_XY_STATE_TOPIC = "xy_state_topic"
CONF_XY_VALUE_TEMPLATE = "xy_value_template"
CONF_WHITE_VALUE_COMMAND_TOPIC = "white_value_command_topic"
CONF_WHITE_VALUE_SCALE = "white_value_scale"
CONF_WHITE_VALUE_STATE_TOPIC = "white_value_state_topic"
CONF_WHITE_VALUE_TEMPLATE = "white_value_template"
CONF_ON_COMMAND_TYPE = "on_command_type"

DEFAULT_BRIGHTNESS_SCALE = 255
DEFAULT_NAME = "MQTT LightEntity"
DEFAULT_OPTIMISTIC = False
DEFAULT_PAYLOAD_OFF = "OFF"
DEFAULT_PAYLOAD_ON = "ON"
DEFAULT_WHITE_VALUE_SCALE = 255
DEFAULT_ON_COMMAND_TYPE = "last"

VALUES_ON_COMMAND_TYPE = ["first", "last", "brightness"]

PLATFORM_SCHEMA_BASIC = (
    mqtt.MQTT_RW_PLATFORM_SCHEMA.extend(
        {
            vol.Optional(CONF_BRIGHTNESS_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(
                CONF_BRIGHTNESS_SCALE, default=DEFAULT_BRIGHTNESS_SCALE
            ): vol.All(vol.Coerce(int), vol.Range(min=1)),
            vol.Optional(CONF_BRIGHTNESS_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_BRIGHTNESS_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_COLOR_TEMP_COMMAND_TEMPLATE): cv.template,
            vol.Optional(CONF_COLOR_TEMP_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(CONF_COLOR_TEMP_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_COLOR_TEMP_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_DEVICE): mqtt.MQTT_ENTITY_DEVICE_INFO_SCHEMA,
            vol.Optional(CONF_EFFECT_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(CONF_EFFECT_LIST): vol.All(cv.ensure_list, [cv.string]),
            vol.Optional(CONF_EFFECT_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_EFFECT_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_HS_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(CONF_HS_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_HS_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_MAX_MIREDS): cv.positive_int,
            vol.Optional(CONF_MIN_MIREDS): cv.positive_int,
            vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
            vol.Optional(CONF_ON_COMMAND_TYPE, default=DEFAULT_ON_COMMAND_TYPE): vol.In(
                VALUES_ON_COMMAND_TYPE
            ),
            vol.Optional(CONF_OPTIMISTIC, default=DEFAULT_OPTIMISTIC): cv.boolean,
            vol.Optional(CONF_PAYLOAD_OFF, default=DEFAULT_PAYLOAD_OFF): cv.string,
            vol.Optional(CONF_PAYLOAD_ON, default=DEFAULT_PAYLOAD_ON): cv.string,
            vol.Optional(CONF_RGB_COMMAND_TEMPLATE): cv.template,
            vol.Optional(CONF_RGB_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(CONF_RGB_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_RGB_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_STATE_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_UNIQUE_ID): cv.string,
            vol.Optional(CONF_WHITE_VALUE_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(
                CONF_WHITE_VALUE_SCALE, default=DEFAULT_WHITE_VALUE_SCALE
            ): vol.All(vol.Coerce(int), vol.Range(min=1)),
            vol.Optional(CONF_WHITE_VALUE_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_WHITE_VALUE_TEMPLATE): cv.template,
            vol.Optional(CONF_XY_COMMAND_TOPIC): mqtt.valid_publish_topic,
            vol.Optional(CONF_XY_STATE_TOPIC): mqtt.valid_subscribe_topic,
            vol.Optional(CONF_XY_VALUE_TEMPLATE): cv.template,
        }
    )
    .extend(mqtt.MQTT_AVAILABILITY_SCHEMA.schema)
    .extend(mqtt.MQTT_JSON_ATTRS_SCHEMA.schema)
    .extend(MQTT_LIGHT_SCHEMA_SCHEMA.schema)
)


async def async_setup_entity_basic(
    config, async_add_entities, config_entry, discovery_data=None
):
    """Set up a MQTT Light."""
    config.setdefault(CONF_STATE_VALUE_TEMPLATE, config.get(CONF_VALUE_TEMPLATE))

    async_add_entities([MqttLight(config, config_entry, discovery_data)])


class MqttLight(
    MqttAttributes,
    MqttAvailability,
    MqttDiscoveryUpdate,
    MqttEntityDeviceInfo,
    LightEntity,
    RestoreEntity,
):
    """Representation of a MQTT light."""

    def __init__(self, config, config_entry, discovery_data):
        """Initialize MQTT light."""
        self._state = False
        self._sub_state = None
        self._brightness = None
        self._hs = None
        self._color_temp = None
        self._effect = None
        self._white_value = None

        self._topic = None
        self._payload = None
        self._templates = None
        self._optimistic = False
        self._optimistic_rgb = False
        self._optimistic_brightness = False
        self._optimistic_color_temp = False
        self._optimistic_effect = False
        self._optimistic_hs = False
        self._optimistic_white_value = False
        self._optimistic_xy = False
        self._unique_id = config.get(CONF_UNIQUE_ID)

        # Load config
        self._setup_from_config(config)

        device_config = config.get(CONF_DEVICE)

        MqttAttributes.__init__(self, config)
        MqttAvailability.__init__(self, config)
        MqttDiscoveryUpdate.__init__(self, discovery_data, self.discovery_update)
        MqttEntityDeviceInfo.__init__(self, device_config, config_entry)

    async def async_added_to_hass(self):
        """Subscribe to MQTT events."""
        await super().async_added_to_hass()
        await self._subscribe_topics()

    async def discovery_update(self, discovery_payload):
        """Handle updated discovery message."""
        config = PLATFORM_SCHEMA_BASIC(discovery_payload)
        self._setup_from_config(config)
        await self.attributes_discovery_update(config)
        await self.availability_discovery_update(config)
        await self.device_info_discovery_update(config)
        await self._subscribe_topics()
        self.async_write_ha_state()

    def _setup_from_config(self, config):
        """(Re)Setup the entity."""
        self._config = config

        topic = {
            key: config.get(key)
            for key in (
                CONF_BRIGHTNESS_COMMAND_TOPIC,
                CONF_BRIGHTNESS_STATE_TOPIC,
                CONF_COLOR_TEMP_COMMAND_TOPIC,
                CONF_COLOR_TEMP_STATE_TOPIC,
                CONF_COMMAND_TOPIC,
                CONF_EFFECT_COMMAND_TOPIC,
                CONF_EFFECT_STATE_TOPIC,
                CONF_HS_COMMAND_TOPIC,
                CONF_HS_STATE_TOPIC,
                CONF_RGB_COMMAND_TOPIC,
                CONF_RGB_STATE_TOPIC,
                CONF_STATE_TOPIC,
                CONF_WHITE_VALUE_COMMAND_TOPIC,
                CONF_WHITE_VALUE_STATE_TOPIC,
                CONF_XY_COMMAND_TOPIC,
                CONF_XY_STATE_TOPIC,
            )
        }
        self._topic = topic
        self._payload = {"on": config[CONF_PAYLOAD_ON], "off": config[CONF_PAYLOAD_OFF]}
        self._templates = {
            CONF_BRIGHTNESS: config.get(CONF_BRIGHTNESS_VALUE_TEMPLATE),
            CONF_COLOR_TEMP: config.get(CONF_COLOR_TEMP_VALUE_TEMPLATE),
            CONF_COLOR_TEMP_COMMAND_TEMPLATE: config.get(
                CONF_COLOR_TEMP_COMMAND_TEMPLATE
            ),
            CONF_EFFECT: config.get(CONF_EFFECT_VALUE_TEMPLATE),
            CONF_HS: config.get(CONF_HS_VALUE_TEMPLATE),
            CONF_RGB: config.get(CONF_RGB_VALUE_TEMPLATE),
            CONF_RGB_COMMAND_TEMPLATE: config.get(CONF_RGB_COMMAND_TEMPLATE),
            CONF_STATE: config.get(CONF_STATE_VALUE_TEMPLATE),
            CONF_WHITE_VALUE: config.get(CONF_WHITE_VALUE_TEMPLATE),
            CONF_XY: config.get(CONF_XY_VALUE_TEMPLATE),
        }

        optimistic = config[CONF_OPTIMISTIC]
        self._optimistic = optimistic or topic[CONF_STATE_TOPIC] is None
        self._optimistic_rgb = optimistic or topic[CONF_RGB_STATE_TOPIC] is None
        self._optimistic_brightness = (
            optimistic
            or (
                topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is not None
                and topic[CONF_BRIGHTNESS_STATE_TOPIC] is None
            )
            or (
                topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is None
                and topic[CONF_RGB_STATE_TOPIC] is None
            )
        )
        self._optimistic_color_temp = (
            optimistic or topic[CONF_COLOR_TEMP_STATE_TOPIC] is None
        )
        self._optimistic_effect = optimistic or topic[CONF_EFFECT_STATE_TOPIC] is None
        self._optimistic_hs = optimistic or topic[CONF_HS_STATE_TOPIC] is None
        self._optimistic_white_value = (
            optimistic or topic[CONF_WHITE_VALUE_STATE_TOPIC] is None
        )
        self._optimistic_xy = optimistic or topic[CONF_XY_STATE_TOPIC] is None

    async def _subscribe_topics(self):
        """(Re)Subscribe to topics."""
        topics = {}
        templates = {}
        for key, tpl in list(self._templates.items()):
            if tpl is None:
                templates[key] = lambda value: value
            else:
                tpl.hass = self.hass
                templates[key] = tpl.async_render_with_possible_json_value

        last_state = await self.async_get_last_state()

        @callback
        @log_messages(self.hass, self.entity_id)
        def state_received(msg):
            """Handle new MQTT messages."""
            payload = templates[CONF_STATE](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty state message from '%s'", msg.topic)
                return

            if payload == self._payload["on"]:
                self._state = True
            elif payload == self._payload["off"]:
                self._state = False
            self.async_write_ha_state()

        if self._topic[CONF_STATE_TOPIC] is not None:
            topics[CONF_STATE_TOPIC] = {
                "topic": self._topic[CONF_STATE_TOPIC],
                "msg_callback": state_received,
                "qos": self._config[CONF_QOS],
            }
        elif self._optimistic and last_state:
            self._state = last_state.state == STATE_ON

        @callback
        @log_messages(self.hass, self.entity_id)
        def brightness_received(msg):
            """Handle new MQTT messages for the brightness."""
            payload = templates[CONF_BRIGHTNESS](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty brightness message from '%s'", msg.topic)
                return

            device_value = float(payload)
            percent_bright = device_value / self._config[CONF_BRIGHTNESS_SCALE]
            self._brightness = percent_bright * 255
            self.async_write_ha_state()

        if self._topic[CONF_BRIGHTNESS_STATE_TOPIC] is not None:
            topics[CONF_BRIGHTNESS_STATE_TOPIC] = {
                "topic": self._topic[CONF_BRIGHTNESS_STATE_TOPIC],
                "msg_callback": brightness_received,
                "qos": self._config[CONF_QOS],
            }
            self._brightness = 255
        elif (
            self._optimistic_brightness
            and last_state
            and last_state.attributes.get(ATTR_BRIGHTNESS)
        ):
            self._brightness = last_state.attributes.get(ATTR_BRIGHTNESS)
        elif self._topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is not None:
            self._brightness = 255
        else:
            self._brightness = None

        @callback
        @log_messages(self.hass, self.entity_id)
        def rgb_received(msg):
            """Handle new MQTT messages for RGB."""
            payload = templates[CONF_RGB](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty rgb message from '%s'", msg.topic)
                return

            rgb = [int(val) for val in payload.split(",")]
            self._hs = color_util.color_RGB_to_hs(*rgb)
            if self._topic[CONF_BRIGHTNESS_STATE_TOPIC] is None:
                percent_bright = float(color_util.color_RGB_to_hsv(*rgb)[2]) / 100.0
                self._brightness = percent_bright * 255
            self.async_write_ha_state()

        if self._topic[CONF_RGB_STATE_TOPIC] is not None:
            topics[CONF_RGB_STATE_TOPIC] = {
                "topic": self._topic[CONF_RGB_STATE_TOPIC],
                "msg_callback": rgb_received,
                "qos": self._config[CONF_QOS],
            }
            self._hs = (0, 0)
        if (
            self._optimistic_rgb
            and last_state
            and last_state.attributes.get(ATTR_HS_COLOR)
        ):
            self._hs = last_state.attributes.get(ATTR_HS_COLOR)
        elif self._topic[CONF_RGB_COMMAND_TOPIC] is not None:
            self._hs = (0, 0)

        @callback
        @log_messages(self.hass, self.entity_id)
        def color_temp_received(msg):
            """Handle new MQTT messages for color temperature."""
            payload = templates[CONF_COLOR_TEMP](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty color temp message from '%s'", msg.topic)
                return

            self._color_temp = int(payload)
            self.async_write_ha_state()

        if self._topic[CONF_COLOR_TEMP_STATE_TOPIC] is not None:
            topics[CONF_COLOR_TEMP_STATE_TOPIC] = {
                "topic": self._topic[CONF_COLOR_TEMP_STATE_TOPIC],
                "msg_callback": color_temp_received,
                "qos": self._config[CONF_QOS],
            }
            self._color_temp = 150
        if (
            self._optimistic_color_temp
            and last_state
            and last_state.attributes.get(ATTR_COLOR_TEMP)
        ):
            self._color_temp = last_state.attributes.get(ATTR_COLOR_TEMP)
        elif self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC] is not None:
            self._color_temp = 150
        else:
            self._color_temp = None

        @callback
        @log_messages(self.hass, self.entity_id)
        def effect_received(msg):
            """Handle new MQTT messages for effect."""
            payload = templates[CONF_EFFECT](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty effect message from '%s'", msg.topic)
                return

            self._effect = payload
            self.async_write_ha_state()

        if self._topic[CONF_EFFECT_STATE_TOPIC] is not None:
            topics[CONF_EFFECT_STATE_TOPIC] = {
                "topic": self._topic[CONF_EFFECT_STATE_TOPIC],
                "msg_callback": effect_received,
                "qos": self._config[CONF_QOS],
            }
            self._effect = "none"
        if (
            self._optimistic_effect
            and last_state
            and last_state.attributes.get(ATTR_EFFECT)
        ):
            self._effect = last_state.attributes.get(ATTR_EFFECT)
        elif self._topic[CONF_EFFECT_COMMAND_TOPIC] is not None:
            self._effect = "none"
        else:
            self._effect = None

        @callback
        @log_messages(self.hass, self.entity_id)
        def hs_received(msg):
            """Handle new MQTT messages for hs color."""
            payload = templates[CONF_HS](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty hs message from '%s'", msg.topic)
                return

            try:
                hs_color = [float(val) for val in payload.split(",", 2)]
                self._hs = hs_color
                self.async_write_ha_state()
            except ValueError:
                _LOGGER.debug("Failed to parse hs state update: '%s'", payload)

        if self._topic[CONF_HS_STATE_TOPIC] is not None:
            topics[CONF_HS_STATE_TOPIC] = {
                "topic": self._topic[CONF_HS_STATE_TOPIC],
                "msg_callback": hs_received,
                "qos": self._config[CONF_QOS],
            }
            self._hs = (0, 0)
        if (
            self._optimistic_hs
            and last_state
            and last_state.attributes.get(ATTR_HS_COLOR)
        ):
            self._hs = last_state.attributes.get(ATTR_HS_COLOR)
        elif self._topic[CONF_HS_COMMAND_TOPIC] is not None:
            self._hs = (0, 0)

        @callback
        @log_messages(self.hass, self.entity_id)
        def white_value_received(msg):
            """Handle new MQTT messages for white value."""
            payload = templates[CONF_WHITE_VALUE](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty white value message from '%s'", msg.topic)
                return

            device_value = float(payload)
            percent_white = device_value / self._config[CONF_WHITE_VALUE_SCALE]
            self._white_value = percent_white * 255
            self.async_write_ha_state()

        if self._topic[CONF_WHITE_VALUE_STATE_TOPIC] is not None:
            topics[CONF_WHITE_VALUE_STATE_TOPIC] = {
                "topic": self._topic[CONF_WHITE_VALUE_STATE_TOPIC],
                "msg_callback": white_value_received,
                "qos": self._config[CONF_QOS],
            }
            self._white_value = 255
        elif (
            self._optimistic_white_value
            and last_state
            and last_state.attributes.get(ATTR_WHITE_VALUE)
        ):
            self._white_value = last_state.attributes.get(ATTR_WHITE_VALUE)
        elif self._topic[CONF_WHITE_VALUE_COMMAND_TOPIC] is not None:
            self._white_value = 255
        else:
            self._white_value = None

        @callback
        @log_messages(self.hass, self.entity_id)
        def xy_received(msg):
            """Handle new MQTT messages for xy color."""
            payload = templates[CONF_XY](msg.payload)
            if not payload:
                _LOGGER.debug("Ignoring empty xy-color message from '%s'", msg.topic)
                return

            xy_color = [float(val) for val in payload.split(",")]
            self._hs = color_util.color_xy_to_hs(*xy_color)
            self.async_write_ha_state()

        if self._topic[CONF_XY_STATE_TOPIC] is not None:
            topics[CONF_XY_STATE_TOPIC] = {
                "topic": self._topic[CONF_XY_STATE_TOPIC],
                "msg_callback": xy_received,
                "qos": self._config[CONF_QOS],
            }
            self._hs = (0, 0)
        if (
            self._optimistic_xy
            and last_state
            and last_state.attributes.get(ATTR_HS_COLOR)
        ):
            self._hs = last_state.attributes.get(ATTR_HS_COLOR)
        elif self._topic[CONF_XY_COMMAND_TOPIC] is not None:
            self._hs = (0, 0)

        self._sub_state = await subscription.async_subscribe_topics(
            self.hass, self._sub_state, topics
        )

    async def async_will_remove_from_hass(self):
        """Unsubscribe when removed."""
        self._sub_state = await subscription.async_unsubscribe_topics(
            self.hass, self._sub_state
        )
        await MqttAttributes.async_will_remove_from_hass(self)
        await MqttAvailability.async_will_remove_from_hass(self)
        await MqttDiscoveryUpdate.async_will_remove_from_hass(self)

    @property
    def brightness(self):
        """Return the brightness of this light between 0..255."""
        brightness = self._brightness
        if brightness:
            brightness = min(round(brightness), 255)
        return brightness

    @property
    def hs_color(self):
        """Return the hs color value."""
        return self._hs

    @property
    def color_temp(self):
        """Return the color temperature in mired."""
        return self._color_temp

    @property
    def min_mireds(self):
        """Return the coldest color_temp that this light supports."""
        return self._config.get(CONF_MIN_MIREDS, super().min_mireds)

    @property
    def max_mireds(self):
        """Return the warmest color_temp that this light supports."""
        return self._config.get(CONF_MAX_MIREDS, super().max_mireds)

    @property
    def white_value(self):
        """Return the white property."""
        white_value = self._white_value
        if white_value:
            white_value = min(round(white_value), 255)
        return white_value

    @property
    def should_poll(self):
        """No polling needed for a MQTT light."""
        return False

    @property
    def name(self):
        """Return the name of the device if any."""
        return self._config[CONF_NAME]

    @property
    def unique_id(self):
        """Return a unique ID."""
        return self._unique_id

    @property
    def is_on(self):
        """Return true if device is on."""
        return self._state

    @property
    def assumed_state(self):
        """Return true if we do optimistic updates."""
        return self._optimistic

    @property
    def effect_list(self):
        """Return the list of supported effects."""
        return self._config.get(CONF_EFFECT_LIST)

    @property
    def effect(self):
        """Return the current effect."""
        return self._effect

    @property
    def supported_features(self):
        """Flag supported features."""
        supported_features = 0
        supported_features |= self._topic[CONF_RGB_COMMAND_TOPIC] is not None and (
            SUPPORT_COLOR | SUPPORT_BRIGHTNESS
        )
        supported_features |= (
            self._topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is not None
            and SUPPORT_BRIGHTNESS
        )
        supported_features |= (
            self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC] is not None
            and SUPPORT_COLOR_TEMP
        )
        supported_features |= (
            self._topic[CONF_EFFECT_COMMAND_TOPIC] is not None and SUPPORT_EFFECT
        )
        supported_features |= (
            self._topic[CONF_HS_COMMAND_TOPIC] is not None and SUPPORT_COLOR
        )
        supported_features |= (
            self._topic[CONF_WHITE_VALUE_COMMAND_TOPIC] is not None
            and SUPPORT_WHITE_VALUE
        )
        supported_features |= (
            self._topic[CONF_XY_COMMAND_TOPIC] is not None and SUPPORT_COLOR
        )

        return supported_features

    async def async_turn_on(self, **kwargs):
        """Turn the device on.

        This method is a coroutine.
        """
        should_update = False
        on_command_type = self._config[CONF_ON_COMMAND_TYPE]

        if on_command_type == "first":
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_COMMAND_TOPIC],
                self._payload["on"],
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )
            should_update = True

        # If brightness is being used instead of an on command, make sure
        # there is a brightness input.  Either set the brightness to our
        # saved value or the maximum value if this is the first call
        elif on_command_type == "brightness":
            if ATTR_BRIGHTNESS not in kwargs:
                kwargs[ATTR_BRIGHTNESS] = self._brightness if self._brightness else 255

        if ATTR_HS_COLOR in kwargs and self._topic[CONF_RGB_COMMAND_TOPIC] is not None:

            hs_color = kwargs[ATTR_HS_COLOR]

            # If there's a brightness topic set, we don't want to scale the RGB
            # values given using the brightness.
            if self._topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is not None:
                brightness = 255
            else:
                brightness = kwargs.get(
                    ATTR_BRIGHTNESS, self._brightness if self._brightness else 255
                )
            rgb = color_util.color_hsv_to_RGB(
                hs_color[0], hs_color[1], brightness / 255 * 100
            )
            tpl = self._templates[CONF_RGB_COMMAND_TEMPLATE]
            if tpl:
                rgb_color_str = tpl.async_render(
                    {"red": rgb[0], "green": rgb[1], "blue": rgb[2]}
                )
            else:
                rgb_color_str = f"{rgb[0]},{rgb[1]},{rgb[2]}"

            mqtt.async_publish(
                self.hass,
                self._topic[CONF_RGB_COMMAND_TOPIC],
                rgb_color_str,
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_rgb:
                self._hs = kwargs[ATTR_HS_COLOR]
                should_update = True

        if ATTR_HS_COLOR in kwargs and self._topic[CONF_HS_COMMAND_TOPIC] is not None:

            hs_color = kwargs[ATTR_HS_COLOR]
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_HS_COMMAND_TOPIC],
                f"{hs_color[0]},{hs_color[1]}",
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_hs:
                self._hs = kwargs[ATTR_HS_COLOR]
                should_update = True

        if ATTR_HS_COLOR in kwargs and self._topic[CONF_XY_COMMAND_TOPIC] is not None:

            xy_color = color_util.color_hs_to_xy(*kwargs[ATTR_HS_COLOR])
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_XY_COMMAND_TOPIC],
                f"{xy_color[0]},{xy_color[1]}",
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_xy:
                self._hs = kwargs[ATTR_HS_COLOR]
                should_update = True

        if (
            ATTR_BRIGHTNESS in kwargs
            and self._topic[CONF_BRIGHTNESS_COMMAND_TOPIC] is not None
        ):
            brightness_normalized = kwargs[ATTR_BRIGHTNESS] / 255
            brightness_scale = self._config[CONF_BRIGHTNESS_SCALE]
            device_brightness = min(
                round(brightness_normalized * brightness_scale), brightness_scale
            )
            # Make sure the brightness is not rounded down to 0
            device_brightness = max(device_brightness, 1)
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_BRIGHTNESS_COMMAND_TOPIC],
                device_brightness,
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_brightness:
                self._brightness = kwargs[ATTR_BRIGHTNESS]
                should_update = True
        elif (
            ATTR_BRIGHTNESS in kwargs
            and ATTR_HS_COLOR not in kwargs
            and self._topic[CONF_RGB_COMMAND_TOPIC] is not None
        ):
            rgb = color_util.color_hsv_to_RGB(
                self._hs[0], self._hs[1], kwargs[ATTR_BRIGHTNESS] / 255 * 100
            )
            tpl = self._templates[CONF_RGB_COMMAND_TEMPLATE]
            if tpl:
                rgb_color_str = tpl.async_render(
                    {"red": rgb[0], "green": rgb[1], "blue": rgb[2]}
                )
            else:
                rgb_color_str = f"{rgb[0]},{rgb[1]},{rgb[2]}"

            mqtt.async_publish(
                self.hass,
                self._topic[CONF_RGB_COMMAND_TOPIC],
                rgb_color_str,
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_brightness:
                self._brightness = kwargs[ATTR_BRIGHTNESS]
                should_update = True

        if (
            ATTR_COLOR_TEMP in kwargs
            and self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC] is not None
        ):
            color_temp = int(kwargs[ATTR_COLOR_TEMP])
            tpl = self._templates[CONF_COLOR_TEMP_COMMAND_TEMPLATE]

            if tpl:
                color_temp = tpl.async_render({"value": color_temp})

            mqtt.async_publish(
                self.hass,
                self._topic[CONF_COLOR_TEMP_COMMAND_TOPIC],
                color_temp,
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_color_temp:
                self._color_temp = kwargs[ATTR_COLOR_TEMP]
                should_update = True

        if ATTR_EFFECT in kwargs and self._topic[CONF_EFFECT_COMMAND_TOPIC] is not None:
            effect = kwargs[ATTR_EFFECT]
            if effect in self._config.get(CONF_EFFECT_LIST):
                mqtt.async_publish(
                    self.hass,
                    self._topic[CONF_EFFECT_COMMAND_TOPIC],
                    effect,
                    self._config[CONF_QOS],
                    self._config[CONF_RETAIN],
                )

                if self._optimistic_effect:
                    self._effect = kwargs[ATTR_EFFECT]
                    should_update = True

        if (
            ATTR_WHITE_VALUE in kwargs
            and self._topic[CONF_WHITE_VALUE_COMMAND_TOPIC] is not None
        ):
            percent_white = float(kwargs[ATTR_WHITE_VALUE]) / 255
            white_scale = self._config[CONF_WHITE_VALUE_SCALE]
            device_white_value = min(round(percent_white * white_scale), white_scale)
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_WHITE_VALUE_COMMAND_TOPIC],
                device_white_value,
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )

            if self._optimistic_white_value:
                self._white_value = kwargs[ATTR_WHITE_VALUE]
                should_update = True

        if on_command_type == "last":
            mqtt.async_publish(
                self.hass,
                self._topic[CONF_COMMAND_TOPIC],
                self._payload["on"],
                self._config[CONF_QOS],
                self._config[CONF_RETAIN],
            )
            should_update = True

        if self._optimistic:
            # Optimistically assume that the light has changed state.
            self._state = True
            should_update = True

        if should_update:
            self.async_write_ha_state()

    async def async_turn_off(self, **kwargs):
        """Turn the device off.

        This method is a coroutine.
        """
        mqtt.async_publish(
            self.hass,
            self._topic[CONF_COMMAND_TOPIC],
            self._payload["off"],
            self._config[CONF_QOS],
            self._config[CONF_RETAIN],
        )

        if self._optimistic:
            # Optimistically assume that the light has changed state.
            self._state = False
            self.async_write_ha_state()
