"""Switch entities for Boiler Auxiliary Heater Control."""

from __future__ import annotations

from typing import Any

from homeassistant.components.switch import SwitchEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import EntityCategory
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import DeviceInfo
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.restore_state import RestoreEntity

from .const import DOMAIN, SWITCH_DEFINITIONS


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up switch entities."""
    coordinator = hass.data[DOMAIN][entry.entry_id]

    entities = []
    for key, defn in SWITCH_DEFINITIONS.items():
        entity = BoilerAuxHeaterSwitch(coordinator, entry, key, defn)
        entities.append(entity)

    async_add_entities(entities)


class BoilerAuxHeaterSwitch(RestoreEntity, SwitchEntity):
    """A mode toggle switch for the boiler aux heater."""

    _attr_has_entity_name = True
    _attr_entity_category = EntityCategory.CONFIG

    def __init__(
        self,
        coordinator,
        entry: ConfigEntry,
        key: str,
        defn: dict,
    ) -> None:
        """Initialize the switch entity."""
        self.coordinator = coordinator
        self._key = key
        self._defn = defn
        self._attr_unique_id = f"{entry.entry_id}_{key}"
        self._attr_translation_key = key
        self._attr_icon = defn["icon"]
        self._attr_is_on = defn["default"]
        self._attr_device_info = DeviceInfo(
            identifiers={(DOMAIN, entry.entry_id)},
            name="Boiler Auxiliary Heater",
            manufacturer="Custom",
        )

    async def async_added_to_hass(self) -> None:
        """Restore state on startup."""
        await super().async_added_to_hass()
        last_state = await self.async_get_last_state()
        if last_state and last_state.state not in ("unknown", "unavailable"):
            self._attr_is_on = last_state.state == "on"
        # Register with coordinator
        self.coordinator.register_switch(self._key, self)

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn on the switch."""
        self._attr_is_on = True
        self.async_write_ha_state()
        self.coordinator.async_request_refresh()

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn off the switch."""
        self._attr_is_on = False
        self.async_write_ha_state()
        self.coordinator.async_request_refresh()