"""Component to pressing a button as platforms."""

from __future__ import annotations

from datetime import timedelta
from enum import StrEnum
import logging
from typing import final

from propcache.api import cached_property
import voluptuous as vol

from homeassistant.config_entries import ConfigEntry
from homeassistant.const import STATE_UNAVAILABLE
from homeassistant.core import HomeAssistant
from homeassistant.helpers import config_validation as cv
from homeassistant.helpers.entity import EntityDescription
from homeassistant.helpers.entity_component import EntityComponent
from homeassistant.helpers.restore_state import RestoreEntity
from homeassistant.helpers.typing import ConfigType
from homeassistant.util import dt as dt_util
from homeassistant.util.hass_dict import HassKey

from .const import DOMAIN, SERVICE_PRESS

_LOGGER = logging.getLogger(__name__)

DATA_COMPONENT: HassKey[EntityComponent[ButtonEntity]] = HassKey(DOMAIN)
ENTITY_ID_FORMAT = DOMAIN + ".{}"
PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
SCAN_INTERVAL = timedelta(seconds=30)

MIN_TIME_BETWEEN_SCANS = timedelta(seconds=10)


class ButtonDeviceClass(StrEnum):
    """Device class for buttons."""

    IDENTIFY = "identify"
    RESTART = "restart"
    UPDATE = "update"


DEVICE_CLASSES_SCHEMA = vol.All(vol.Lower, vol.Coerce(ButtonDeviceClass))

# mypy: disallow-any-generics


async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
    """Set up Button entities."""
    component = hass.data[DATA_COMPONENT] = EntityComponent[ButtonEntity](
        _LOGGER, DOMAIN, hass, SCAN_INTERVAL
    )
    await component.async_setup(config)

    component.async_register_entity_service(
        SERVICE_PRESS,
        None,
        "_async_press_action",
    )

    return True


async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Set up a config entry."""
    return await hass.data[DATA_COMPONENT].async_setup_entry(entry)


async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
    """Unload a config entry."""
    return await hass.data[DATA_COMPONENT].async_unload_entry(entry)


class ButtonEntityDescription(EntityDescription, frozen_or_thawed=True):
    """A class that describes button entities."""

    device_class: ButtonDeviceClass | None = None


CACHED_PROPERTIES_WITH_ATTR_ = {
    "device_class",
}


class ButtonEntity(RestoreEntity, cached_properties=CACHED_PROPERTIES_WITH_ATTR_):
    """Representation of a Button entity."""

    entity_description: ButtonEntityDescription
    _attr_should_poll = False
    _attr_device_class: ButtonDeviceClass | None
    _attr_state: None = None
    __last_pressed_isoformat: str | None = None

    def _default_to_device_class_name(self) -> bool:
        """Return True if an unnamed entity should be named by its device class.

        For buttons this is True if the entity has a device class.
        """
        return self.device_class is not None

    @cached_property
    def device_class(self) -> ButtonDeviceClass | None:
        """Return the class of this entity."""
        if hasattr(self, "_attr_device_class"):
            return self._attr_device_class
        if hasattr(self, "entity_description"):
            return self.entity_description.device_class
        return None

    @cached_property
    @final
    def state(self) -> str | None:
        """Return the entity state."""
        return self.__last_pressed_isoformat

    def __set_state(self, state: str | None) -> None:
        """Set the entity state."""
        # Invalidate the cache of the cached property
        self.__dict__.pop("state", None)
        self.__last_pressed_isoformat = state

    @final
    async def _async_press_action(self) -> None:
        """Press the button (from e.g., service call).

        Should not be overridden, handle setting last press timestamp.
        """
        self.__set_state(dt_util.utcnow().isoformat())
        self.async_write_ha_state()
        await self.async_press()

    async def async_internal_added_to_hass(self) -> None:
        """Call when the button is added to hass."""
        await super().async_internal_added_to_hass()
        state = await self.async_get_last_state()
        if state is not None and state.state not in (STATE_UNAVAILABLE, None):
            self.__set_state(state.state)

    def press(self) -> None:
        """Press the button."""
        raise NotImplementedError

    async def async_press(self) -> None:
        """Press the button."""
        await self.hass.async_add_executor_job(self.press)
