"""Support for WeMo humidifier."""
from __future__ import annotations

import asyncio
from datetime import timedelta
import math
from typing import Any

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.dispatcher import async_dispatcher_connect
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.util.percentage import (
    int_states_in_range,
    percentage_to_ranged_value,
    ranged_value_to_percentage,
)

from .const import (
    DOMAIN as WEMO_DOMAIN,
    SERVICE_RESET_FILTER_LIFE,
    SERVICE_SET_HUMIDITY,
)
from .entity import WemoBinaryStateEntity
from .wemo_device import DeviceCoordinator

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 = {
    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: AddEntitiesCallback,
) -> None:
    """Set up WeMo binary sensors."""

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

    async_dispatcher_connect(hass, f"{WEMO_DOMAIN}.fan", _discovered_wemo)

    await asyncio.gather(
        *(
            _discovered_wemo(coordinator)
            for coordinator in hass.data[WEMO_DOMAIN]["pending"].pop("fan")
        )
    )

    platform = entity_platform.async_get_current_platform()

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

    # This will call WemoHumidifier.reset_filter_life()
    platform.async_register_entity_service(
        SERVICE_RESET_FILTER_LIFE, {}, WemoHumidifier.reset_filter_life.__name__
    )


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

    _attr_supported_features = FanEntityFeature.SET_SPEED
    wemo: Humidifier

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

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

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

    @callback
    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()

    def turn_on(
        self,
        percentage: int | None = None,
        preset_mode: str | None = None,
        **kwargs: Any,
    ) -> None:
        """Turn the fan on."""
        self._set_percentage(percentage)

    def turn_off(self, **kwargs: Any) -> None:
        """Turn the switch off."""
        with self._wemo_call_wrapper("turn off"):
            self.wemo.set_state(FanMode.Off)

    def set_percentage(self, percentage: int) -> None:
        """Set the fan_mode of the Humidifier."""
        self._set_percentage(percentage)

    def _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))
            )

        with self._wemo_call_wrapper("set speed"):
            self.wemo.set_state(named_speed)

    def 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

        with self._wemo_call_wrapper("set humidity"):
            self.wemo.set_humidity(pywemo_humidity)

    def reset_filter_life(self) -> None:
        """Reset the filter life to 100%."""
        with self._wemo_call_wrapper("reset filter life"):
            self.wemo.reset_filter_life()
