"""Support for Hydrawise sprinkler sensors."""

from collections.abc import Callable, Iterable
from dataclasses import dataclass
from datetime import timedelta
from typing import Any

from pydrawise.schema import Controller, ControllerWaterUseSummary, Zone

from homeassistant.components.sensor import (
    SensorDeviceClass,
    SensorEntity,
    SensorEntityDescription,
)
from homeassistant.const import UnitOfTime, UnitOfVolume
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
from homeassistant.util import dt as dt_util

from .coordinator import HydrawiseConfigEntry
from .entity import HydrawiseEntity

PARALLEL_UPDATES = 0


@dataclass(frozen=True, kw_only=True)
class HydrawiseSensorEntityDescription(SensorEntityDescription):
    """Describes Hydrawise binary sensor."""

    value_fn: Callable[[HydrawiseSensor], Any]


def _get_water_use(sensor: HydrawiseSensor) -> ControllerWaterUseSummary:
    return sensor.coordinator.data.daily_water_summary.get(
        sensor.controller.id, ControllerWaterUseSummary()
    )


WATER_USE_CONTROLLER_SENSORS: tuple[HydrawiseSensorEntityDescription, ...] = (
    HydrawiseSensorEntityDescription(
        key="daily_active_water_time",
        translation_key="daily_active_water_time",
        device_class=SensorDeviceClass.DURATION,
        native_unit_of_measurement=UnitOfTime.SECONDS,
        value_fn=lambda sensor: _get_water_use(
            sensor
        ).total_active_time.total_seconds(),
    ),
)


WATER_USE_ZONE_SENSORS: tuple[HydrawiseSensorEntityDescription, ...] = (
    HydrawiseSensorEntityDescription(
        key="daily_active_water_time",
        translation_key="daily_active_water_time",
        device_class=SensorDeviceClass.DURATION,
        native_unit_of_measurement=UnitOfTime.SECONDS,
        value_fn=lambda sensor: (
            _get_water_use(sensor)
            .active_time_by_zone_id.get(sensor.zone.id, timedelta())
            .total_seconds()
        ),
    ),
)

FLOW_CONTROLLER_SENSORS: tuple[HydrawiseSensorEntityDescription, ...] = (
    HydrawiseSensorEntityDescription(
        key="daily_total_water_use",
        translation_key="daily_total_water_use",
        device_class=SensorDeviceClass.WATER,
        suggested_display_precision=1,
        value_fn=lambda sensor: _get_water_use(sensor).total_use,
    ),
    HydrawiseSensorEntityDescription(
        key="daily_active_water_use",
        translation_key="daily_active_water_use",
        device_class=SensorDeviceClass.WATER,
        suggested_display_precision=1,
        value_fn=lambda sensor: _get_water_use(sensor).total_active_use,
    ),
    HydrawiseSensorEntityDescription(
        key="daily_inactive_water_use",
        translation_key="daily_inactive_water_use",
        device_class=SensorDeviceClass.WATER,
        suggested_display_precision=1,
        value_fn=lambda sensor: _get_water_use(sensor).total_inactive_use,
    ),
)

FLOW_ZONE_SENSORS: tuple[SensorEntityDescription, ...] = (
    HydrawiseSensorEntityDescription(
        key="daily_active_water_use",
        translation_key="daily_active_water_use",
        device_class=SensorDeviceClass.WATER,
        suggested_display_precision=1,
        value_fn=lambda sensor: float(
            _get_water_use(sensor).active_use_by_zone_id.get(sensor.zone.id, 0.0)
        ),
    ),
)

ZONE_SENSORS: tuple[HydrawiseSensorEntityDescription, ...] = (
    HydrawiseSensorEntityDescription(
        key="next_cycle",
        translation_key="next_cycle",
        device_class=SensorDeviceClass.TIMESTAMP,
        value_fn=lambda sensor: (
            dt_util.as_utc(sensor.zone.scheduled_runs.next_run.start_time)
            if sensor.zone.scheduled_runs.next_run is not None
            else None
        ),
    ),
    HydrawiseSensorEntityDescription(
        key="watering_time",
        translation_key="watering_time",
        native_unit_of_measurement=UnitOfTime.MINUTES,
        value_fn=lambda sensor: (
            int(
                sensor.zone.scheduled_runs.current_run.remaining_time.total_seconds()
                / 60
            )
            if sensor.zone.scheduled_runs.current_run is not None
            else 0
        ),
    ),
)

FLOW_MEASUREMENT_KEYS = [x.key for x in FLOW_CONTROLLER_SENSORS]


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: HydrawiseConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up the Hydrawise sensor platform."""
    coordinators = config_entry.runtime_data

    def _has_flow_sensor(controller: Controller) -> bool:
        daily_water_use_summary = coordinators.water_use.data.daily_water_summary.get(
            controller.id, ControllerWaterUseSummary()
        )
        return daily_water_use_summary.total_use is not None

    def _add_new_controllers(controllers: Iterable[Controller]) -> None:
        entities: list[HydrawiseSensor] = []
        for controller in controllers:
            entities.extend(
                HydrawiseSensor(coordinators.water_use, description, controller)
                for description in WATER_USE_CONTROLLER_SENSORS
            )
            if _has_flow_sensor(controller):
                entities.extend(
                    HydrawiseSensor(coordinators.water_use, description, controller)
                    for description in FLOW_CONTROLLER_SENSORS
                )
        async_add_entities(entities)

    def _add_new_zones(zones: Iterable[tuple[Zone, Controller]]) -> None:
        async_add_entities(
            [
                HydrawiseSensor(
                    coordinators.water_use, description, controller, zone_id=zone.id
                )
                for zone, controller in zones
                for description in WATER_USE_ZONE_SENSORS
            ]
            + [
                HydrawiseSensor(
                    coordinators.main, description, controller, zone_id=zone.id
                )
                for zone, controller in zones
                for description in ZONE_SENSORS
            ]
            + [
                HydrawiseSensor(
                    coordinators.water_use,
                    description,
                    controller,
                    zone_id=zone.id,
                )
                for zone, controller in zones
                for description in FLOW_ZONE_SENSORS
                if _has_flow_sensor(controller)
            ]
        )

    _add_new_controllers(coordinators.main.data.controllers.values())
    _add_new_zones(
        [
            (zone, coordinators.main.data.zone_id_to_controller[zone.id])
            for zone in coordinators.main.data.zones.values()
        ]
    )
    coordinators.main.new_controllers_callbacks.append(_add_new_controllers)
    coordinators.main.new_zones_callbacks.append(_add_new_zones)


class HydrawiseSensor(HydrawiseEntity, SensorEntity):
    """A sensor implementation for Hydrawise device."""

    entity_description: HydrawiseSensorEntityDescription

    @property
    def native_unit_of_measurement(self) -> str | None:
        """Return the unit_of_measurement of the sensor."""
        if self.entity_description.device_class != SensorDeviceClass.WATER:
            return self.entity_description.native_unit_of_measurement
        return (
            UnitOfVolume.GALLONS
            if self.coordinator.data.user.units.units_name == "imperial"
            else UnitOfVolume.LITERS
        )

    @property
    def icon(self) -> str | None:
        """Icon of the entity based on the value."""
        if (
            self.entity_description.key in FLOW_MEASUREMENT_KEYS
            and self.entity_description.device_class == SensorDeviceClass.WATER
            and round(self.state, 2) == 0.0
        ):
            return "mdi:water-outline"
        return None

    def _update_attrs(self) -> None:
        """Update state attributes."""
        self._attr_native_value = self.entity_description.value_fn(self)