"""BSBLAN platform to control a compatible Climate Device."""

from __future__ import annotations

from typing import Any

from bsblan import BSBLANError

from homeassistant.components.climate import (
    ATTR_HVAC_MODE,
    ATTR_PRESET_MODE,
    PRESET_ECO,
    PRESET_NONE,
    ClimateEntity,
    ClimateEntityFeature,
    HVACMode,
)
from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
from homeassistant.core import HomeAssistant
from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
from homeassistant.helpers.device_registry import format_mac
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.util.enum import try_parse_enum

from . import BSBLanConfigEntry, BSBLanData
from .const import ATTR_TARGET_TEMPERATURE, DOMAIN
from .entity import BSBLanEntity

PARALLEL_UPDATES = 1

HVAC_MODES = [
    HVACMode.AUTO,
    HVACMode.HEAT,
    HVACMode.OFF,
]

PRESET_MODES = [
    PRESET_ECO,
    PRESET_NONE,
]


async def async_setup_entry(
    hass: HomeAssistant,
    entry: BSBLanConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up BSBLAN device based on a config entry."""
    data = entry.runtime_data
    async_add_entities([BSBLANClimate(data)])


class BSBLANClimate(BSBLanEntity, ClimateEntity):
    """Defines a BSBLAN climate device."""

    _attr_has_entity_name = True
    _attr_name = None
    # Determine preset modes
    _attr_supported_features = (
        ClimateEntityFeature.TARGET_TEMPERATURE
        | ClimateEntityFeature.PRESET_MODE
        | ClimateEntityFeature.TURN_OFF
        | ClimateEntityFeature.TURN_ON
    )

    _attr_preset_modes = PRESET_MODES
    _attr_hvac_modes = HVAC_MODES
    _enable_turn_on_off_backwards_compatibility = False

    def __init__(
        self,
        data: BSBLanData,
    ) -> None:
        """Initialize BSBLAN climate device."""
        super().__init__(data.coordinator, data)
        self._attr_unique_id = f"{format_mac(data.device.MAC)}-climate"

        self._attr_min_temp = float(data.static.min_temp.value)
        self._attr_max_temp = float(data.static.max_temp.value)
        if data.static.min_temp.unit in ("°C", "°C"):
            self._attr_temperature_unit = UnitOfTemperature.CELSIUS
        else:
            self._attr_temperature_unit = UnitOfTemperature.FAHRENHEIT

    @property
    def current_temperature(self) -> float | None:
        """Return the current temperature."""
        if self.coordinator.data.state.current_temperature.value == "---":
            # device returns no current temperature
            return None

        return float(self.coordinator.data.state.current_temperature.value)

    @property
    def target_temperature(self) -> float | None:
        """Return the temperature we try to reach."""
        return float(self.coordinator.data.state.target_temperature.value)

    @property
    def hvac_mode(self) -> HVACMode | None:
        """Return hvac operation ie. heat, cool mode."""
        if self.coordinator.data.state.hvac_mode.value == PRESET_ECO:
            return HVACMode.AUTO
        return try_parse_enum(HVACMode, self.coordinator.data.state.hvac_mode.value)

    @property
    def preset_mode(self) -> str | None:
        """Return the current preset mode."""
        if (
            self.hvac_mode == HVACMode.AUTO
            and self.coordinator.data.state.hvac_mode.value == PRESET_ECO
        ):
            return PRESET_ECO
        return PRESET_NONE

    async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
        """Set hvac mode."""
        await self.async_set_data(hvac_mode=hvac_mode)

    async def async_set_preset_mode(self, preset_mode: str) -> None:
        """Set preset mode."""
        if self.hvac_mode != HVACMode.AUTO and preset_mode != PRESET_NONE:
            raise ServiceValidationError(
                "Preset mode can only be set when HVAC mode is set to 'auto'",
                translation_domain=DOMAIN,
                translation_key="set_preset_mode_error",
                translation_placeholders={"preset_mode": preset_mode},
            )
        await self.async_set_data(preset_mode=preset_mode)

    async def async_set_temperature(self, **kwargs: Any) -> None:
        """Set new target temperatures."""
        await self.async_set_data(**kwargs)

    async def async_set_data(self, **kwargs: Any) -> None:
        """Set device settings using BSBLAN."""
        data = {}
        if ATTR_TEMPERATURE in kwargs:
            data[ATTR_TARGET_TEMPERATURE] = kwargs[ATTR_TEMPERATURE]
        if ATTR_HVAC_MODE in kwargs:
            data[ATTR_HVAC_MODE] = kwargs[ATTR_HVAC_MODE]
        if ATTR_PRESET_MODE in kwargs:
            if kwargs[ATTR_PRESET_MODE] == PRESET_ECO:
                data[ATTR_HVAC_MODE] = PRESET_ECO
            elif kwargs[ATTR_PRESET_MODE] == PRESET_NONE:
                data[ATTR_HVAC_MODE] = PRESET_NONE

        try:
            await self.coordinator.client.thermostat(**data)
        except BSBLANError as err:
            raise HomeAssistantError(
                "An error occurred while updating the BSBLAN device",
                translation_domain=DOMAIN,
                translation_key="set_data_error",
            ) from err
        await self.coordinator.async_request_refresh()