"""Support for WeMo humidifier."""

from datetime import timedelta
import functools as ft
import math
from typing import Any, override

from pywemo import DesiredHumidity, FanMode, Humidifier
import voluptuous as vol

from homeassistant.components.fan import FanEntity, FanEntityFeature
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant, callback
from homeassistant.helpers import entity_platform
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
from homeassistant.helpers.typing import VolDictType
from homeassistant.util.percentage import (
    percentage_to_ranged_value,
    ranged_value_to_percentage,
)
from homeassistant.util.scaling import int_states_in_range

from . import async_wemo_dispatcher_connect
from .const import SERVICE_RESET_FILTER_LIFE, SERVICE_SET_HUMIDITY
from .coordinator import DeviceCoordinator
from .entity import WemoBinaryStateEntity

SCAN_INTERVAL = timedelta(seconds=10)
PARALLEL_UPDATES = 0

ATTR_CURRENT_HUMIDITY = "current_humidity"
ATTR_TARGET_HUMIDITY = "target_humidity"
ATTR_FAN_MODE = "fan_mode"
ATTR_FILTER_LIFE = "filter_life"
ATTR_FILTER_EXPIRED = "filter_expired"
ATTR_WATER_LEVEL = "water_level"

SPEED_RANGE = (FanMode.Minimum, FanMode.Maximum)  # off is not included

SET_HUMIDITY_SCHEMA: VolDictType = {
    vol.Required(ATTR_TARGET_HUMIDITY): vol.All(
        vol.Coerce(float), vol.Range(min=0, max=100)
    ),
}


async def async_setup_entry(
    hass: HomeAssistant,
    _config_entry: ConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up WeMo binary sensors."""

    async def _discovered_wemo(coordinator: DeviceCoordinator) -> None:
        """Handle a discovered Wemo device."""
        async_add_entities([WemoHumidifier(coordinator)])

    await async_wemo_dispatcher_connect(hass, _discovered_wemo)

    platform = entity_platform.async_get_current_platform()

    # This will call WemoHumidifier.async_set_humidity(target_humidity=VALUE)
    platform.async_register_entity_service(
        SERVICE_SET_HUMIDITY,
        SET_HUMIDITY_SCHEMA,
        WemoHumidifier.async_set_humidity.__name__,
    )

    # This will call WemoHumidifier.async_reset_filter_life()
    platform.async_register_entity_service(
        SERVICE_RESET_FILTER_LIFE, None, WemoHumidifier.async_reset_filter_life.__name__
    )


class WemoHumidifier(WemoBinaryStateEntity, FanEntity):
    """Representation of a WeMo humidifier."""

    _attr_supported_features = (
        FanEntityFeature.SET_SPEED
        | FanEntityFeature.TURN_OFF
        | FanEntityFeature.TURN_ON
    )
    wemo: Humidifier
    _last_fan_on_mode: FanMode

    def __init__(self, coordinator: DeviceCoordinator) -> None:
        """Initialize the WeMo switch."""
        super().__init__(coordinator)
        if self.wemo.fan_mode != FanMode.Off:
            self._last_fan_on_mode = self.wemo.fan_mode
        else:
            self._last_fan_on_mode = FanMode.High

    @property
    @override
    def icon(self) -> str:
        """Return the icon of device based on its type."""
        return "mdi:water-percent"

    @property
    @override
    def extra_state_attributes(self) -> dict[str, Any]:
        """Return device specific state attributes."""
        return {
            ATTR_CURRENT_HUMIDITY: self.wemo.current_humidity_percent,
            ATTR_TARGET_HUMIDITY: self.wemo.desired_humidity_percent,
            ATTR_FAN_MODE: self.wemo.fan_mode_string,
            ATTR_WATER_LEVEL: self.wemo.water_level_string,
            ATTR_FILTER_LIFE: self.wemo.filter_life_percent,
            ATTR_FILTER_EXPIRED: self.wemo.filter_expired,
        }

    @property
    @override
    def percentage(self) -> int:
        """Return the current speed percentage."""
        return ranged_value_to_percentage(SPEED_RANGE, self.wemo.fan_mode)

    @property
    @override
    def speed_count(self) -> int:
        """Return the number of speeds the fan supports."""
        return int_states_in_range(SPEED_RANGE)

    @callback
    @override
    def _handle_coordinator_update(self) -> None:
        """Handle updated data from the coordinator."""
        if self.wemo.fan_mode != FanMode.Off:
            self._last_fan_on_mode = self.wemo.fan_mode
        super()._handle_coordinator_update()

    @override
    async def async_turn_on(
        self,
        percentage: int | None = None,
        preset_mode: str | None = None,
        **kwargs: Any,
    ) -> None:
        """Turn the fan on."""
        await self._async_set_percentage(percentage)

    @override
    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn the fan off."""
        await self._async_wemo_call(
            "turn off", ft.partial(self.wemo.set_state, FanMode.Off)
        )

    @override
    async def async_set_percentage(self, percentage: int) -> None:
        """Set the fan_mode of the Humidifier."""
        await self._async_set_percentage(percentage)

    async def _async_set_percentage(self, percentage: int | None) -> None:
        if percentage is None:
            named_speed = self._last_fan_on_mode
        elif percentage == 0:
            named_speed = FanMode.Off
        else:
            named_speed = FanMode(
                math.ceil(percentage_to_ranged_value(SPEED_RANGE, percentage))
            )

        await self._async_wemo_call(
            "set speed", ft.partial(self.wemo.set_state, named_speed)
        )

    async def async_set_humidity(self, target_humidity: float) -> None:
        """Set the target humidity level for the Humidifier."""
        if target_humidity < 50:
            pywemo_humidity = DesiredHumidity.FortyFivePercent
        elif 50 <= target_humidity < 55:
            pywemo_humidity = DesiredHumidity.FiftyPercent
        elif 55 <= target_humidity < 60:
            pywemo_humidity = DesiredHumidity.FiftyFivePercent
        elif 60 <= target_humidity < 100:
            pywemo_humidity = DesiredHumidity.SixtyPercent
        elif target_humidity >= 100:
            pywemo_humidity = DesiredHumidity.OneHundredPercent

        await self._async_wemo_call(
            "set humidity", ft.partial(self.wemo.set_humidity, pywemo_humidity)
        )

    async def async_reset_filter_life(self) -> None:
        """Reset the filter life to 100%."""
        await self._async_wemo_call("reset filter life", self.wemo.reset_filter_life)