"""Switcher integration Light platform."""

from __future__ import annotations

from typing import Any, cast

from aioswitcher.device import DeviceCategory, DeviceState, SwitcherLight

from homeassistant.components.light import ColorMode, LightEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant, callback
from homeassistant.helpers.dispatcher import async_dispatcher_connect
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback

from .const import SIGNAL_DEVICE_ADD
from .coordinator import SwitcherDataUpdateCoordinator
from .entity import SwitcherEntity

API_SET_LIGHT = "set_light"


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up Switcher light from a config entry."""

    @callback
    def async_add_light(coordinator: SwitcherDataUpdateCoordinator) -> None:
        """Add light from Switcher device."""
        entities: list[LightEntity] = []

        if coordinator.data.device_type.category in (
            DeviceCategory.SINGLE_SHUTTER_DUAL_LIGHT,
            DeviceCategory.DUAL_SHUTTER_SINGLE_LIGHT,
            DeviceCategory.LIGHT,
        ):
            number_of_lights = len(cast(SwitcherLight, coordinator.data).light)
            if number_of_lights == 1:
                entities.append(SwitcherSingleLightEntity(coordinator, 0))
            else:
                entities.extend(
                    SwitcherMultiLightEntity(coordinator, i)
                    for i in range(number_of_lights)
                )
        async_add_entities(entities)

    config_entry.async_on_unload(
        async_dispatcher_connect(hass, SIGNAL_DEVICE_ADD, async_add_light)
    )


class SwitcherBaseLightEntity(SwitcherEntity, LightEntity):
    """Representation of a Switcher light entity."""

    _attr_color_mode = ColorMode.ONOFF
    _attr_supported_color_modes = {ColorMode.ONOFF}
    control_result: bool | None = None
    _light_id: int

    @callback
    def _handle_coordinator_update(self) -> None:
        """When device updates, clear control result that overrides state."""
        self.control_result = None
        self.async_write_ha_state()

    @property
    def is_on(self) -> bool:
        """Return True if entity is on."""
        if self.control_result is not None:
            return self.control_result

        data = cast(SwitcherLight, self.coordinator.data)
        return bool(data.light[self._light_id] == DeviceState.ON)

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn the light on."""
        await self._async_call_api(API_SET_LIGHT, DeviceState.ON, self._light_id)
        self.control_result = True
        self.async_write_ha_state()

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn the light off."""
        await self._async_call_api(API_SET_LIGHT, DeviceState.OFF, self._light_id)
        self.control_result = False
        self.async_write_ha_state()


class SwitcherSingleLightEntity(SwitcherBaseLightEntity):
    """Representation of a Switcher single light entity."""

    _attr_name = None

    def __init__(
        self,
        coordinator: SwitcherDataUpdateCoordinator,
        light_id: int,
    ) -> None:
        """Initialize the entity."""
        super().__init__(coordinator)
        self._light_id = light_id
        self.control_result: bool | None = None

        # Entity class attributes
        self._attr_unique_id = f"{coordinator.device_id}-{coordinator.mac_address}"


class SwitcherMultiLightEntity(SwitcherBaseLightEntity):
    """Representation of a Switcher multiple light entity."""

    _attr_translation_key = "light"

    def __init__(
        self,
        coordinator: SwitcherDataUpdateCoordinator,
        light_id: int,
    ) -> None:
        """Initialize the entity."""
        super().__init__(coordinator)
        self._light_id = light_id
        self.control_result: bool | None = None

        # Entity class attributes
        self._attr_translation_placeholders = {"light_id": str(light_id + 1)}
        self._attr_unique_id = (
            f"{coordinator.device_id}-{coordinator.mac_address}-{light_id}"
        )