"""Support for Homekit climate devices."""
from __future__ import annotations

import logging
from typing import Any, Final

from aiohomekit.model.characteristics import (
    ActivationStateValues,
    CharacteristicsTypes,
    CurrentHeaterCoolerStateValues,
    HeatingCoolingCurrentValues,
    HeatingCoolingTargetValues,
    SwingModeValues,
    TargetHeaterCoolerStateValues,
)
from aiohomekit.model.services import Service, ServicesTypes
from aiohomekit.utils import clamp_enum_to_char

from homeassistant.components.climate import (
    DEFAULT_MAX_TEMP,
    DEFAULT_MIN_TEMP,
    ClimateEntity,
    ClimateEntityFeature,
)
from homeassistant.components.climate.const import (
    ATTR_HVAC_MODE,
    ATTR_TARGET_TEMP_HIGH,
    ATTR_TARGET_TEMP_LOW,
    CURRENT_HVAC_COOL,
    CURRENT_HVAC_HEAT,
    CURRENT_HVAC_IDLE,
    CURRENT_HVAC_OFF,
    HVAC_MODE_COOL,
    HVAC_MODE_HEAT,
    HVAC_MODE_HEAT_COOL,
    HVAC_MODE_OFF,
    SWING_OFF,
    SWING_VERTICAL,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import ATTR_TEMPERATURE, TEMP_CELSIUS
from homeassistant.core import HomeAssistant, callback
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from . import KNOWN_DEVICES, HomeKitEntity

_LOGGER = logging.getLogger(__name__)

# Map of Homekit operation modes to hass modes
MODE_HOMEKIT_TO_HASS = {
    HeatingCoolingTargetValues.OFF: HVAC_MODE_OFF,
    HeatingCoolingTargetValues.HEAT: HVAC_MODE_HEAT,
    HeatingCoolingTargetValues.COOL: HVAC_MODE_COOL,
    HeatingCoolingTargetValues.AUTO: HVAC_MODE_HEAT_COOL,
}

CURRENT_MODE_HOMEKIT_TO_HASS = {
    HeatingCoolingCurrentValues.IDLE: CURRENT_HVAC_IDLE,
    HeatingCoolingCurrentValues.HEATING: CURRENT_HVAC_HEAT,
    HeatingCoolingCurrentValues.COOLING: CURRENT_HVAC_COOL,
}

SWING_MODE_HOMEKIT_TO_HASS = {
    SwingModeValues.DISABLED: SWING_OFF,
    SwingModeValues.ENABLED: SWING_VERTICAL,
}

CURRENT_HEATER_COOLER_STATE_HOMEKIT_TO_HASS = {
    CurrentHeaterCoolerStateValues.INACTIVE: CURRENT_HVAC_OFF,
    CurrentHeaterCoolerStateValues.IDLE: CURRENT_HVAC_IDLE,
    CurrentHeaterCoolerStateValues.HEATING: CURRENT_HVAC_HEAT,
    CurrentHeaterCoolerStateValues.COOLING: CURRENT_HVAC_COOL,
}

TARGET_HEATER_COOLER_STATE_HOMEKIT_TO_HASS = {
    TargetHeaterCoolerStateValues.AUTOMATIC: HVAC_MODE_HEAT_COOL,
    TargetHeaterCoolerStateValues.HEAT: HVAC_MODE_HEAT,
    TargetHeaterCoolerStateValues.COOL: HVAC_MODE_COOL,
}

# Map of hass operation modes to homekit modes
MODE_HASS_TO_HOMEKIT = {v: k for k, v in MODE_HOMEKIT_TO_HASS.items()}

TARGET_HEATER_COOLER_STATE_HASS_TO_HOMEKIT = {
    v: k for k, v in TARGET_HEATER_COOLER_STATE_HOMEKIT_TO_HASS.items()
}

SWING_MODE_HASS_TO_HOMEKIT = {v: k for k, v in SWING_MODE_HOMEKIT_TO_HASS.items()}

DEFAULT_MIN_STEP: Final = 1.0


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up Homekit climate."""
    hkid = config_entry.data["AccessoryPairingID"]
    conn = hass.data[KNOWN_DEVICES][hkid]

    @callback
    def async_add_service(service: Service) -> bool:
        if not (entity_class := ENTITY_TYPES.get(service.type)):
            return False
        info = {"aid": service.accessory.aid, "iid": service.iid}
        async_add_entities([entity_class(conn, info)], True)
        return True

    conn.add_listener(async_add_service)


class HomeKitHeaterCoolerEntity(HomeKitEntity, ClimateEntity):
    """Representation of a Homekit climate device."""

    def get_characteristic_types(self) -> list[str]:
        """Define the homekit characteristics the entity cares about."""
        return [
            CharacteristicsTypes.ACTIVE,
            CharacteristicsTypes.CURRENT_HEATER_COOLER_STATE,
            CharacteristicsTypes.TARGET_HEATER_COOLER_STATE,
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD,
            CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD,
            CharacteristicsTypes.SWING_MODE,
            CharacteristicsTypes.TEMPERATURE_CURRENT,
        ]

    async def async_set_temperature(self, **kwargs: Any) -> None:
        """Set new target temperature."""
        temp = kwargs.get(ATTR_TEMPERATURE)
        state = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        if state == TargetHeaterCoolerStateValues.COOL:
            await self.async_put_characteristics(
                {CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD: temp}
            )
        elif state == TargetHeaterCoolerStateValues.HEAT:
            await self.async_put_characteristics(
                {CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD: temp}
            )
        else:
            hvac_mode = TARGET_HEATER_COOLER_STATE_HOMEKIT_TO_HASS.get(state)
            _LOGGER.warning(
                "HomeKit device %s: Setting temperature in %s mode is not supported yet;"
                " Consider raising a ticket if you have this device and want to help us implement this feature",
                self.entity_id,
                hvac_mode,
            )

    async def async_set_hvac_mode(self, hvac_mode: str) -> None:
        """Set new target operation mode."""
        if hvac_mode == HVAC_MODE_OFF:
            await self.async_put_characteristics(
                {CharacteristicsTypes.ACTIVE: ActivationStateValues.INACTIVE}
            )
            return
        if hvac_mode not in {HVAC_MODE_HEAT, HVAC_MODE_COOL}:
            _LOGGER.warning(
                "HomeKit device %s: Setting temperature in %s mode is not supported yet;"
                " Consider raising a ticket if you have this device and want to help us implement this feature",
                self.entity_id,
                hvac_mode,
            )
        await self.async_put_characteristics(
            {
                CharacteristicsTypes.TARGET_HEATER_COOLER_STATE: TARGET_HEATER_COOLER_STATE_HASS_TO_HOMEKIT[
                    hvac_mode
                ],
            }
        )

    @property
    def current_temperature(self) -> float:
        """Return the current temperature."""
        return self.service.value(CharacteristicsTypes.TEMPERATURE_CURRENT)

    @property
    def target_temperature(self) -> float | None:
        """Return the temperature we try to reach."""
        state = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        if state == TargetHeaterCoolerStateValues.COOL:
            return self.service.value(
                CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
            )
        if state == TargetHeaterCoolerStateValues.HEAT:
            return self.service.value(
                CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
            )
        return None

    @property
    def target_temperature_step(self) -> float:
        """Return the supported step of target temperature."""
        state = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        if state == TargetHeaterCoolerStateValues.COOL and self.service.has(
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
        ):
            return (
                self.service[CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD].minStep
                or DEFAULT_MIN_STEP
            )
        if state == TargetHeaterCoolerStateValues.HEAT and self.service.has(
            CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
        ):
            return (
                self.service[CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD].minStep
                or DEFAULT_MIN_STEP
            )
        return DEFAULT_MIN_STEP

    @property
    def min_temp(self) -> float:
        """Return the minimum target temp."""
        state = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        if state == TargetHeaterCoolerStateValues.COOL and self.service.has(
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
        ):
            return (
                self.service[
                    CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
                ].minValue
                or DEFAULT_MIN_TEMP
            )
        if state == TargetHeaterCoolerStateValues.HEAT and self.service.has(
            CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
        ):
            return (
                self.service[
                    CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
                ].minValue
                or DEFAULT_MIN_TEMP
            )
        return super().min_temp

    @property
    def max_temp(self) -> float:
        """Return the maximum target temp."""
        state = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        if state == TargetHeaterCoolerStateValues.COOL and self.service.has(
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
        ):
            return (
                self.service[
                    CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
                ].maxValue
                or DEFAULT_MAX_TEMP
            )
        if state == TargetHeaterCoolerStateValues.HEAT and self.service.has(
            CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
        ):
            return (
                self.service[
                    CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
                ].maxValue
                or DEFAULT_MAX_TEMP
            )
        return super().max_temp

    @property
    def hvac_action(self) -> str | None:
        """Return the current running hvac operation."""
        # This characteristic describes the current mode of a device,
        # e.g. a thermostat is "heating" a room to 75 degrees Fahrenheit.
        # Can be 0 - 3 (Off, Idle, Heat, Cool)
        if (
            self.service.value(CharacteristicsTypes.ACTIVE)
            == ActivationStateValues.INACTIVE
        ):
            return CURRENT_HVAC_OFF
        value = self.service.value(CharacteristicsTypes.CURRENT_HEATER_COOLER_STATE)
        return CURRENT_HEATER_COOLER_STATE_HOMEKIT_TO_HASS.get(value)

    @property
    def hvac_mode(self) -> str:
        """Return hvac operation ie. heat, cool mode."""
        # This characteristic describes the target mode
        # E.g. should the device start heating a room if the temperature
        # falls below the target temperature.
        # Can be 0 - 2 (Auto, Heat, Cool)
        if (
            self.service.value(CharacteristicsTypes.ACTIVE)
            == ActivationStateValues.INACTIVE
        ):
            return HVAC_MODE_OFF
        value = self.service.value(CharacteristicsTypes.TARGET_HEATER_COOLER_STATE)
        return TARGET_HEATER_COOLER_STATE_HOMEKIT_TO_HASS[value]

    @property
    def hvac_modes(self) -> list[str]:
        """Return the list of available hvac operation modes."""
        valid_values = clamp_enum_to_char(
            TargetHeaterCoolerStateValues,
            self.service[CharacteristicsTypes.TARGET_HEATER_COOLER_STATE],
        )
        modes = [
            TARGET_HEATER_COOLER_STATE_HOMEKIT_TO_HASS[mode] for mode in valid_values
        ]
        modes.append(HVAC_MODE_OFF)
        return modes

    @property
    def swing_mode(self) -> str:
        """Return the swing setting.

        Requires ClimateEntityFeature.SWING_MODE.
        """
        value = self.service.value(CharacteristicsTypes.SWING_MODE)
        return SWING_MODE_HOMEKIT_TO_HASS[value]

    @property
    def swing_modes(self) -> list[str]:
        """Return the list of available swing modes.

        Requires ClimateEntityFeature.SWING_MODE.
        """
        valid_values = clamp_enum_to_char(
            SwingModeValues,
            self.service[CharacteristicsTypes.SWING_MODE],
        )
        return [SWING_MODE_HOMEKIT_TO_HASS[mode] for mode in valid_values]

    async def async_set_swing_mode(self, swing_mode: str) -> None:
        """Set new target swing operation."""
        await self.async_put_characteristics(
            {CharacteristicsTypes.SWING_MODE: SWING_MODE_HASS_TO_HOMEKIT[swing_mode]}
        )

    @property
    def supported_features(self) -> int:
        """Return the list of supported features."""
        features = 0

        if self.service.has(CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD):
            features |= ClimateEntityFeature.TARGET_TEMPERATURE

        if self.service.has(CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD):
            features |= ClimateEntityFeature.TARGET_TEMPERATURE

        if self.service.has(CharacteristicsTypes.SWING_MODE):
            features |= ClimateEntityFeature.SWING_MODE

        return features

    @property
    def temperature_unit(self) -> str:
        """Return the unit of measurement."""
        return TEMP_CELSIUS


class HomeKitClimateEntity(HomeKitEntity, ClimateEntity):
    """Representation of a Homekit climate device."""

    def get_characteristic_types(self) -> list[str]:
        """Define the homekit characteristics the entity cares about."""
        return [
            CharacteristicsTypes.HEATING_COOLING_CURRENT,
            CharacteristicsTypes.HEATING_COOLING_TARGET,
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD,
            CharacteristicsTypes.TEMPERATURE_CURRENT,
            CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD,
            CharacteristicsTypes.TEMPERATURE_TARGET,
            CharacteristicsTypes.RELATIVE_HUMIDITY_CURRENT,
            CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET,
        ]

    async def async_set_temperature(self, **kwargs: Any) -> None:
        """Set new target temperature."""
        chars: dict[str, Any] = {}

        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        mode = MODE_HOMEKIT_TO_HASS[value]

        if kwargs.get(ATTR_HVAC_MODE, mode) != mode:
            mode = kwargs[ATTR_HVAC_MODE]
            chars[CharacteristicsTypes.HEATING_COOLING_TARGET] = MODE_HASS_TO_HOMEKIT[
                mode
            ]

        temp = kwargs.get(ATTR_TEMPERATURE)
        heat_temp = kwargs.get(ATTR_TARGET_TEMP_LOW)
        cool_temp = kwargs.get(ATTR_TARGET_TEMP_HIGH)

        if (
            (mode == HVAC_MODE_HEAT_COOL)
            and (
                ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
            )
            and heat_temp
            and cool_temp
        ):
            if temp is None:
                temp = (cool_temp + heat_temp) / 2
            chars.update(
                {
                    CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD: heat_temp,
                    CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD: cool_temp,
                    CharacteristicsTypes.TEMPERATURE_TARGET: temp,
                }
            )
        else:
            chars[CharacteristicsTypes.TEMPERATURE_TARGET] = temp

        await self.async_put_characteristics(chars)

    async def async_set_humidity(self, humidity: int) -> None:
        """Set new target humidity."""
        await self.async_put_characteristics(
            {CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET: humidity}
        )

    async def async_set_hvac_mode(self, hvac_mode: str) -> None:
        """Set new target operation mode."""
        await self.async_put_characteristics(
            {
                CharacteristicsTypes.HEATING_COOLING_TARGET: MODE_HASS_TO_HOMEKIT[
                    hvac_mode
                ],
            }
        )

    @property
    def current_temperature(self) -> float | None:
        """Return the current temperature."""
        return self.service.value(CharacteristicsTypes.TEMPERATURE_CURRENT)

    @property
    def target_temperature(self) -> float | None:
        """Return the temperature we try to reach."""
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        if (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT, HVAC_MODE_COOL}) or (
            (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT_COOL})
            and not (
                ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
            )
        ):
            return self.service.value(CharacteristicsTypes.TEMPERATURE_TARGET)
        return None

    @property
    def target_temperature_high(self) -> float | None:
        """Return the highbound target temperature we try to reach."""
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        if (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT_COOL}) and (
            ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
        ):
            return self.service.value(
                CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
            )
        return None

    @property
    def target_temperature_low(self) -> float | None:
        """Return the lowbound target temperature we try to reach."""
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        if (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT_COOL}) and (
            ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
        ):
            return self.service.value(
                CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
            )
        return None

    @property
    def min_temp(self) -> float:
        """Return the minimum target temp."""
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        if (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT_COOL}) and (
            ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
        ):
            min_temp = self.service[
                CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD
            ].minValue
            if min_temp is not None:
                return min_temp
        elif MODE_HOMEKIT_TO_HASS.get(value) in {
            HVAC_MODE_HEAT,
            HVAC_MODE_COOL,
            HVAC_MODE_HEAT_COOL,
        }:
            min_temp = self.service[CharacteristicsTypes.TEMPERATURE_TARGET].minValue
            if min_temp is not None:
                return min_temp
        return super().min_temp

    @property
    def max_temp(self) -> float:
        """Return the maximum target temp."""
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        if (MODE_HOMEKIT_TO_HASS.get(value) in {HVAC_MODE_HEAT_COOL}) and (
            ClimateEntityFeature.TARGET_TEMPERATURE_RANGE & self.supported_features
        ):
            max_temp = self.service[
                CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
            ].maxValue
            if max_temp is not None:
                return max_temp
        elif MODE_HOMEKIT_TO_HASS.get(value) in {
            HVAC_MODE_HEAT,
            HVAC_MODE_COOL,
            HVAC_MODE_HEAT_COOL,
        }:
            max_temp = self.service[CharacteristicsTypes.TEMPERATURE_TARGET].maxValue
            if max_temp is not None:
                return max_temp
        return super().max_temp

    @property
    def current_humidity(self) -> int:
        """Return the current humidity."""
        return self.service.value(CharacteristicsTypes.RELATIVE_HUMIDITY_CURRENT)

    @property
    def target_humidity(self) -> int:
        """Return the humidity we try to reach."""
        return self.service.value(CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET)

    @property
    def min_humidity(self) -> int:
        """Return the minimum humidity."""
        min_humidity = self.service[
            CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET
        ].minValue
        if min_humidity is not None:
            return int(min_humidity)
        return super().min_humidity

    @property
    def max_humidity(self) -> int:
        """Return the maximum humidity."""
        max_humidity = self.service[
            CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET
        ].maxValue
        if max_humidity is not None:
            return int(max_humidity)
        return super().max_humidity

    @property
    def hvac_action(self) -> str | None:
        """Return the current running hvac operation."""
        # This characteristic describes the current mode of a device,
        # e.g. a thermostat is "heating" a room to 75 degrees Fahrenheit.
        # Can be 0 - 2 (Off, Heat, Cool)
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_CURRENT)
        return CURRENT_MODE_HOMEKIT_TO_HASS.get(value)

    @property
    def hvac_mode(self) -> str:
        """Return hvac operation ie. heat, cool mode."""
        # This characteristic describes the target mode
        # E.g. should the device start heating a room if the temperature
        # falls below the target temperature.
        # Can be 0 - 3 (Off, Heat, Cool, Auto)
        value = self.service.value(CharacteristicsTypes.HEATING_COOLING_TARGET)
        return MODE_HOMEKIT_TO_HASS[value]

    @property
    def hvac_modes(self) -> list[str]:
        """Return the list of available hvac operation modes."""
        valid_values = clamp_enum_to_char(
            HeatingCoolingTargetValues,
            self.service[CharacteristicsTypes.HEATING_COOLING_TARGET],
        )
        return [MODE_HOMEKIT_TO_HASS[mode] for mode in valid_values]

    @property
    def supported_features(self) -> int:
        """Return the list of supported features."""
        features = 0

        if self.service.has(CharacteristicsTypes.TEMPERATURE_TARGET):
            features |= ClimateEntityFeature.TARGET_TEMPERATURE

        if self.service.has(
            CharacteristicsTypes.TEMPERATURE_COOLING_THRESHOLD
        ) and self.service.has(CharacteristicsTypes.TEMPERATURE_HEATING_THRESHOLD):
            features |= ClimateEntityFeature.TARGET_TEMPERATURE_RANGE

        if self.service.has(CharacteristicsTypes.RELATIVE_HUMIDITY_TARGET):
            features |= ClimateEntityFeature.TARGET_HUMIDITY

        return features

    @property
    def temperature_unit(self) -> str:
        """Return the unit of measurement."""
        return TEMP_CELSIUS


ENTITY_TYPES = {
    ServicesTypes.HEATER_COOLER: HomeKitHeaterCoolerEntity,
    ServicesTypes.THERMOSTAT: HomeKitClimateEntity,
}