ha_xiaomi_home/custom_components/xiaomi_home/water_heater.py

# -*- coding: utf-8 -*-
"""
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Water heater entities for Xiaomi Home.
"""
from __future__ import annotations
import logging
from typing import Any, Optional

from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.components.water_heater import (
    STATE_ON,
    STATE_OFF,
    ATTR_TEMPERATURE,
    WaterHeaterEntity,
    WaterHeaterEntityFeature
)

from .miot.const import DOMAIN
from .miot.miot_device import MIoTDevice, MIoTEntityData,  MIoTServiceEntity
from .miot.miot_spec import MIoTSpecProperty

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
        hass: HomeAssistant,
        config_entry: ConfigEntry,
        async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up a config entry."""
    device_list: list[MIoTDevice] = hass.data[DOMAIN]['devices'][
        config_entry.entry_id]

    new_entities = []
    for miot_device in device_list:
        for data in miot_device.entity_list.get('water_heater', []):
            new_entities.append(WaterHeater(
                miot_device=miot_device, entity_data=data))

    if new_entities:
        async_add_entities(new_entities)


class WaterHeater(MIoTServiceEntity, WaterHeaterEntity):
    """Water heater entities for Xiaomi Home."""
    _prop_on: Optional[MIoTSpecProperty]
    _prop_temp: Optional[MIoTSpecProperty]
    _prop_target_temp: Optional[MIoTSpecProperty]
    _prop_mode: Optional[MIoTSpecProperty]

    _mode_map: Optional[dict[Any, Any]]

    def __init__(
        self, miot_device: MIoTDevice, entity_data: MIoTEntityData
    ) -> None:
        """Initialize the Water heater."""
        super().__init__(miot_device=miot_device, entity_data=entity_data)
        self._attr_temperature_unit = None  # type: ignore
        self._attr_supported_features = WaterHeaterEntityFeature(0)
        self._prop_on = None
        self._prop_temp = None
        self._prop_target_temp = None
        self._prop_mode = None
        self._mode_map = None

        # properties
        for prop in entity_data.props:
            # on
            if prop.name == 'on':
                self._attr_supported_features |= WaterHeaterEntityFeature.ON_OFF
                self._prop_on = prop
            # temperature
            if prop.name == 'temperature':
                if not prop.value_range:
                    _LOGGER.error(
                        'invalid temperature value_range format, %s',
                        self.entity_id)
                    continue
                if prop.external_unit:
                    self._attr_temperature_unit = prop.external_unit
                self._attr_min_temp = prop.value_range.min_
                self._attr_max_temp = prop.value_range.max_
                self._prop_temp = prop
            # target-temperature
            if prop.name == 'target-temperature':
                if not prop.value_range:
                    _LOGGER.error(
                        'invalid target-temperature value_range format, %s',
                        self.entity_id)
                    continue
                self._attr_target_temperature_low = prop.value_range.min_
                self._attr_target_temperature_high = prop.value_range.max_
                self._attr_precision = prop.value_range.step
                if self._attr_temperature_unit is None and prop.external_unit:
                    self._attr_temperature_unit = prop.external_unit
                self._attr_supported_features |= (
                    WaterHeaterEntityFeature.TARGET_TEMPERATURE)
                self._prop_target_temp = prop
            # mode
            if prop.name == 'mode':
                if not prop.value_list:
                    _LOGGER.error(
                        'mode value_list is None, %s', self.entity_id)
                    continue
                self._mode_map = prop.value_list.to_map()
                self._attr_operation_list = list(self._mode_map.values())
                self._attr_supported_features |= (
                    WaterHeaterEntityFeature.OPERATION_MODE)
                self._prop_mode = prop
        if not self._attr_operation_list:
            self._attr_operation_list = [STATE_ON]
        self._attr_operation_list.append(STATE_OFF)

    async def async_turn_on(self) -> None:
        """Turn the water heater on."""
        await self.set_property_async(prop=self._prop_on, value=True)

    async def async_turn_off(self) -> None:
        """Turn the water heater off."""
        await self.set_property_async(prop=self._prop_on, value=False)

    async def async_set_temperature(self, **kwargs: Any) -> None:
        """Set the temperature the water heater should heat water to."""
        if not self._prop_target_temp:
            return
        await self.set_property_async(
            prop=self._prop_target_temp, value=kwargs[ATTR_TEMPERATURE])

    async def async_set_operation_mode(self, operation_mode: str) -> None:
        """Set the operation mode of the water heater.
        Must be in the operation_list.
        """
        if operation_mode == STATE_OFF:
            await self.set_property_async(prop=self._prop_on, value=False)
            return
        if operation_mode == STATE_ON:
            await self.set_property_async(prop=self._prop_on, value=True)
            return
        if self.get_prop_value(prop=self._prop_on) is False:
            await self.set_property_async(
                prop=self._prop_on, value=True, write_ha_state=False)
        await self.set_property_async(
            prop=self._prop_mode,
            value=self.get_map_key(
                map_=self._mode_map, value=operation_mode))

    @property
    def current_temperature(self) -> Optional[float]:
        """Return the current temperature."""
        return self.get_prop_value(prop=self._prop_temp)

    @property
    def target_temperature(self) -> Optional[float]:
        """Return the target temperature."""
        if not self._prop_target_temp:
            return None
        return self.get_prop_value(prop=self._prop_target_temp)

    @property
    def current_operation(self) -> Optional[str]:
        """Return the current mode."""
        if self.get_prop_value(prop=self._prop_on) is False:
            return STATE_OFF
        if not self._prop_mode and self.get_prop_value(prop=self._prop_on):
            return STATE_ON
        return self.get_map_value(
            map_=self._mode_map,
            key=self.get_prop_value(prop=self._prop_mode))