"""Number platform for SwitchBot devices."""

from collections.abc import Awaitable, Callable
from dataclasses import dataclass
from datetime import timedelta
import logging
from typing import override

import switchbot
from switchbot import SwitchbotOperationError
from switchbot.devices.meter_pro import MAX_TIME_OFFSET

from homeassistant.components.number import (
    NumberDeviceClass,
    NumberEntity,
    NumberEntityDescription,
)
from homeassistant.const import EntityCategory, UnitOfTime
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback

from .coordinator import SwitchbotConfigEntry, SwitchbotDataUpdateCoordinator
from .entity import SwitchbotEntity, exception_handler

PARALLEL_UPDATES = 0
SCAN_INTERVAL = timedelta(days=7)
_LOGGER = logging.getLogger(__name__)
_SECONDS_IN_MINUTE = 60
_MAX_TIME_OFFSET_MINUTES = MAX_TIME_OFFSET // _SECONDS_IN_MINUTE


async def async_setup_entry(
    hass: HomeAssistant,
    entry: SwitchbotConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up SwitchBot number platform."""
    coordinator = entry.runtime_data

    if isinstance(coordinator.device, switchbot.SwitchbotMeterProCO2):
        async_add_entities(
            [SwitchBotMeterProCO2DisplayTimeOffsetNumber(coordinator)], True
        )
    elif isinstance(coordinator.device, switchbot.SwitchbotStandingFan):
        async_add_entities(
            SwitchBotStandingFanOscillationAngleNumber(coordinator, desc)
            for desc in OSCILLATION_NUMBER_DESCRIPTIONS
        )


class SwitchBotMeterProCO2DisplayTimeOffsetNumber(SwitchbotEntity, NumberEntity):
    """Number entity to set the time offset for Meter Pro CO2 devices."""

    _device: switchbot.SwitchbotMeterProCO2
    _attr_device_class = NumberDeviceClass.DURATION
    _attr_entity_category = EntityCategory.CONFIG
    _attr_translation_key = "display_time_offset"
    _attr_native_min_value = -_MAX_TIME_OFFSET_MINUTES
    _attr_native_max_value = _MAX_TIME_OFFSET_MINUTES
    _attr_native_step = 1.0
    _attr_native_unit_of_measurement = UnitOfTime.MINUTES
    _attr_should_poll = True
    _attr_entity_registry_enabled_default = False

    def __init__(self, coordinator: SwitchbotDataUpdateCoordinator) -> None:
        """Initialize the number entity."""
        super().__init__(coordinator)
        self._attr_unique_id = f"{coordinator.base_unique_id}_display_time_offset"

    @exception_handler
    @override
    async def async_set_native_value(self, value: float) -> None:
        """Set the time offset."""
        _LOGGER.debug("Setting time offset to %s minutes for %s", value, self._address)
        offset_minutes = round(value)
        offset_seconds = offset_minutes * _SECONDS_IN_MINUTE
        await self._device.set_time_offset(offset_seconds)
        self._attr_native_value = offset_minutes
        self.async_write_ha_state()

    @override
    async def async_update(self) -> None:
        """Fetch the latest time offset from the device."""
        try:
            offset_seconds = await self._device.get_time_offset()
        except SwitchbotOperationError:
            _LOGGER.debug(
                "Failed to update time offset for %s", self._address, exc_info=True
            )
            return
        self._attr_native_value = round(offset_seconds / _SECONDS_IN_MINUTE)


@dataclass(frozen=True, kw_only=True)
class SwitchBotOscillationAngleNumberEntityDescription(NumberEntityDescription):
    """Describes a Standing Fan oscillation angle number entity."""

    setter: Callable[[switchbot.SwitchbotStandingFan, int], Awaitable[None]]


OSCILLATION_NUMBER_DESCRIPTIONS: tuple[
    SwitchBotOscillationAngleNumberEntityDescription, ...
] = (
    SwitchBotOscillationAngleNumberEntityDescription(
        key="horizontal_oscillation_angle",
        translation_key="horizontal_oscillation_angle",
        native_min_value=30,
        native_max_value=90,
        native_step=30,
        setter=lambda device, angle: device.set_horizontal_oscillation_angle(angle),
    ),
    SwitchBotOscillationAngleNumberEntityDescription(
        key="vertical_oscillation_angle",
        translation_key="vertical_oscillation_angle",
        native_min_value=30,
        native_max_value=90,
        native_step=30,
        setter=lambda device, angle: device.set_vertical_oscillation_angle(angle),
    ),
)


class SwitchBotStandingFanOscillationAngleNumber(SwitchbotEntity, NumberEntity):
    """Number entity for oscillation angle on Standing Fan.

    Uses assumed_state=True because the device does not report its current
    oscillation angle back to HA — state is only known after the user sets it.
    """

    entity_description: SwitchBotOscillationAngleNumberEntityDescription
    _device: switchbot.SwitchbotStandingFan
    _attr_assumed_state = True
    _attr_entity_category = EntityCategory.CONFIG

    def __init__(
        self,
        coordinator: SwitchbotDataUpdateCoordinator,
        description: SwitchBotOscillationAngleNumberEntityDescription,
    ) -> None:
        """Initialize the oscillation angle number entity."""
        super().__init__(coordinator)
        self.entity_description = description
        self._attr_unique_id = f"{coordinator.base_unique_id}_{description.key}"

    @exception_handler
    @override
    async def async_set_native_value(self, value: float) -> None:
        """Set oscillation angle."""
        await self.entity_description.setter(self._device, int(value))
        self._attr_native_value = value
        self.async_write_ha_state()