"""Switch platform for Tessie integration."""

from __future__ import annotations

from collections.abc import Callable
from dataclasses import dataclass
from itertools import chain
from typing import Any

from tessie_api import (
    disable_sentry_mode,
    disable_valet_mode,
    enable_sentry_mode,
    enable_valet_mode,
    start_charging,
    start_defrost,
    start_steering_wheel_heater,
    stop_charging,
    stop_defrost,
    stop_steering_wheel_heater,
)

from homeassistant.components.switch import (
    SwitchDeviceClass,
    SwitchEntity,
    SwitchEntityDescription,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from . import TessieConfigEntry
from .entity import TessieEnergyEntity, TessieEntity
from .helpers import handle_command
from .models import TessieEnergyData, TessieVehicleData


@dataclass(frozen=True, kw_only=True)
class TessieSwitchEntityDescription(SwitchEntityDescription):
    """Describes Tessie Switch entity."""

    on_func: Callable
    off_func: Callable


DESCRIPTIONS: tuple[TessieSwitchEntityDescription, ...] = (
    TessieSwitchEntityDescription(
        key="climate_state_defrost_mode",
        on_func=lambda: start_defrost,
        off_func=lambda: stop_defrost,
    ),
    TessieSwitchEntityDescription(
        key="vehicle_state_sentry_mode",
        on_func=lambda: enable_sentry_mode,
        off_func=lambda: disable_sentry_mode,
    ),
    TessieSwitchEntityDescription(
        key="vehicle_state_valet_mode",
        on_func=lambda: enable_valet_mode,
        off_func=lambda: disable_valet_mode,
    ),
    TessieSwitchEntityDescription(
        key="climate_state_steering_wheel_heater",
        on_func=lambda: start_steering_wheel_heater,
        off_func=lambda: stop_steering_wheel_heater,
    ),
)

CHARGE_DESCRIPTION: TessieSwitchEntityDescription = TessieSwitchEntityDescription(
    key="charge_state_charge_enable_request",
    on_func=lambda: start_charging,
    off_func=lambda: stop_charging,
)

PARALLEL_UPDATES = 0


async def async_setup_entry(
    hass: HomeAssistant,
    entry: TessieConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the Tessie Switch platform from a config entry."""

    async_add_entities(
        chain(
            (
                TessieSwitchEntity(vehicle, description)
                for vehicle in entry.runtime_data.vehicles
                for description in DESCRIPTIONS
                if description.key in vehicle.data_coordinator.data
            ),
            (
                TessieChargeSwitchEntity(vehicle, CHARGE_DESCRIPTION)
                for vehicle in entry.runtime_data.vehicles
            ),
            (
                TessieChargeFromGridSwitchEntity(energysite)
                for energysite in entry.runtime_data.energysites
                if energysite.info_coordinator.data.get("components_battery")
                and energysite.info_coordinator.data.get("components_solar")
            ),
            (
                TessieStormModeSwitchEntity(energysite)
                for energysite in entry.runtime_data.energysites
                if energysite.info_coordinator.data.get("components_storm_mode_capable")
            ),
        )
    )


class TessieSwitchEntity(TessieEntity, SwitchEntity):
    """Base class for Tessie Switch."""

    _attr_device_class = SwitchDeviceClass.SWITCH
    entity_description: TessieSwitchEntityDescription

    def __init__(
        self,
        vehicle: TessieVehicleData,
        description: TessieSwitchEntityDescription,
    ) -> None:
        """Initialize the Switch."""
        super().__init__(vehicle, description.key)
        self.entity_description = description

    @property
    def is_on(self) -> bool:
        """Return the state of the Switch."""
        return self._value

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn on the Switch."""
        await self.run(self.entity_description.on_func())
        self.set((self.entity_description.key, True))

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn off the Switch."""
        await self.run(self.entity_description.off_func())
        self.set((self.entity_description.key, False))


class TessieChargeSwitchEntity(TessieSwitchEntity):
    """Entity class for Tessie charge switch."""

    @property
    def is_on(self) -> bool:
        """Return the state of the Switch."""

        if (charge := self.get("charge_state_user_charge_enable_request")) is not None:
            return charge
        return self._value


class TessieChargeFromGridSwitchEntity(TessieEnergyEntity, SwitchEntity):
    """Entity class for Charge From Grid switch."""

    def __init__(
        self,
        data: TessieEnergyData,
    ) -> None:
        """Initialize the switch."""
        super().__init__(
            data,
            data.info_coordinator,
            "components_disallow_charge_from_grid_with_solar_installed",
        )

    def _async_update_attrs(self) -> None:
        """Update the attributes of the entity."""
        # When disallow_charge_from_grid_with_solar_installed is missing, its Off.
        # But this sensor is flipped to match how the Tesla app works.
        self._attr_is_on = not self.get(self.key, False)

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn on the Switch."""
        await handle_command(
            self.api.grid_import_export(
                disallow_charge_from_grid_with_solar_installed=False
            )
        )
        self._attr_is_on = True
        self.async_write_ha_state()

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn off the Switch."""
        await handle_command(
            self.api.grid_import_export(
                disallow_charge_from_grid_with_solar_installed=True
            )
        )
        self._attr_is_on = False
        self.async_write_ha_state()


class TessieStormModeSwitchEntity(TessieEnergyEntity, SwitchEntity):
    """Entity class for Storm Mode switch."""

    def __init__(
        self,
        data: TessieEnergyData,
    ) -> None:
        """Initialize the switch."""
        super().__init__(
            data, data.info_coordinator, "user_settings_storm_mode_enabled"
        )

    def _async_update_attrs(self) -> None:
        """Update the attributes of the sensor."""
        self._attr_available = self._value is not None
        self._attr_is_on = bool(self._value)

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn on the Switch."""
        await handle_command(self.api.storm_mode(enabled=True))
        self._attr_is_on = True
        self.async_write_ha_state()

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn off the Switch."""
        await handle_command(self.api.storm_mode(enabled=False))
        self._attr_is_on = False
        self.async_write_ha_state()