"""Hue BLE light platform."""

from __future__ import annotations

import logging
from typing import TYPE_CHECKING, Any

from HueBLE import HueBleLight

from homeassistant.components.light import (
    ATTR_BRIGHTNESS,
    ATTR_COLOR_TEMP_KELVIN,
    ATTR_XY_COLOR,
    ColorMode,
    LightEntity,
    filter_supported_color_modes,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.device_registry import CONNECTION_BLUETOOTH, DeviceInfo
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
from homeassistant.util import color as color_util

_LOGGER = logging.getLogger(__name__)


if TYPE_CHECKING:
    from . import HueBLEConfigEntry


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: HueBLEConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Add light for passed config_entry in HA."""

    light = config_entry.runtime_data
    async_add_entities([HueBLELight(light)])


def get_available_color_modes(api: HueBleLight) -> set[ColorMode]:
    """Return a set of available color modes."""
    color_modes = set()
    if api.supports_colour_xy:
        color_modes.add(ColorMode.XY)
    if api.supports_colour_temp:
        color_modes.add(ColorMode.COLOR_TEMP)
    if api.supports_brightness:
        color_modes.add(ColorMode.BRIGHTNESS)
    if api.supports_on_off:
        color_modes.add(ColorMode.ONOFF)
    return filter_supported_color_modes(color_modes)


class HueBLELight(LightEntity):
    """Representation of a light."""

    _attr_has_entity_name = True
    _attr_name = None

    def __init__(self, light: HueBleLight) -> None:
        """Initialize the light object. Does not connect."""

        self._api = light
        self._attr_unique_id = light.address
        self._attr_min_color_temp_kelvin = (
            color_util.color_temperature_mired_to_kelvin(light.maximum_mireds)
            if light.maximum_mireds
            else None
        )
        self._attr_max_color_temp_kelvin = (
            color_util.color_temperature_mired_to_kelvin(light.minimum_mireds)
            if light.minimum_mireds
            else None
        )
        self._attr_device_info = DeviceInfo(
            name=light.name,
            connections={(CONNECTION_BLUETOOTH, light.address)},
            manufacturer=light.manufacturer,
            model_id=light.model,
            sw_version=light.firmware,
        )
        self._attr_supported_color_modes = get_available_color_modes(self._api)
        self._update_updatable_attributes()

    async def async_added_to_hass(self) -> None:
        """Run when this Entity has been added to HA."""

        self._api.add_callback_on_state_changed(self._state_change_callback)

    async def async_will_remove_from_hass(self) -> None:
        """Run when entity will be removed from HA."""

        self._api.remove_callback(self._state_change_callback)

    def _update_updatable_attributes(self) -> None:
        """Update this entities updatable attrs from the lights state."""
        self._attr_available = self._api.available
        self._attr_is_on = self._api.power_state
        self._attr_brightness = self._api.brightness
        self._attr_color_temp_kelvin = (
            color_util.color_temperature_mired_to_kelvin(self._api.colour_temp)
            if self._api.colour_temp is not None and self._api.colour_temp != 0
            else None
        )
        self._attr_xy_color = self._api.colour_xy

    def _state_change_callback(self) -> None:
        """Run when light informs of state update. Updates local properties."""
        _LOGGER.debug("Received state notification from light %s", self.name)
        self._update_updatable_attributes()
        self.async_write_ha_state()

    async def async_update(self) -> None:
        """Fetch latest state from light and make available via properties."""
        await self._api.poll_state(run_callbacks=True)

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Set properties then turn the light on."""

        _LOGGER.debug("Turning light %s on with args %s", self.name, kwargs)

        if ATTR_BRIGHTNESS in kwargs:
            brightness = kwargs[ATTR_BRIGHTNESS]
            _LOGGER.debug("Setting brightness of %s to %s", self.name, brightness)
            await self._api.set_brightness(brightness)

        if ATTR_COLOR_TEMP_KELVIN in kwargs:
            color_temp_kelvin = kwargs[ATTR_COLOR_TEMP_KELVIN]
            mireds = color_util.color_temperature_kelvin_to_mired(color_temp_kelvin)
            _LOGGER.debug("Setting color temp of %s to %s", self.name, mireds)
            await self._api.set_colour_temp(mireds)

        if ATTR_XY_COLOR in kwargs:
            xy_color = kwargs[ATTR_XY_COLOR]
            _LOGGER.debug("Setting XY color of %s to %s", self.name, xy_color)
            await self._api.set_colour_xy(xy_color[0], xy_color[1])

        await self._api.set_power(True)

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn light off then set properties."""

        _LOGGER.debug("Turning light %s off with args %s", self.name, kwargs)
        await self._api.set_power(False)

    @property
    def color_mode(self) -> ColorMode:
        """Color mode of the light."""

        if self._api.supports_colour_xy and not self._api.colour_temp_mode:
            return ColorMode.XY

        if self._api.colour_temp_mode:
            return ColorMode.COLOR_TEMP

        if self._api.supports_brightness:
            return ColorMode.BRIGHTNESS

        return ColorMode.ONOFF
