"""Support for a ScreenLogic Sensor."""
from screenlogicpy.const import (
    CHEM_DOSING_STATE,
    DATA as SL_DATA,
    DEVICE_TYPE,
    EQUIPMENT,
)

from homeassistant.components.sensor import (
    SensorDeviceClass,
    SensorEntity,
    SensorStateClass,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from . import ScreenlogicEntity
from .const import DOMAIN

SUPPORTED_CHEM_SENSORS = (
    "calcium_harness",
    "current_orp",
    "current_ph",
    "cya",
    "orp_dosing_state",
    "orp_last_dose_time",
    "orp_last_dose_volume",
    "orp_setpoint",
    "ph_dosing_state",
    "ph_last_dose_time",
    "ph_last_dose_volume",
    "ph_probe_water_temp",
    "ph_setpoint",
    "salt_tds_ppm",
    "total_alkalinity",
)

SUPPORTED_SCG_SENSORS = (
    "scg_salt_ppm",
    "scg_super_chlor_timer",
)

SUPPORTED_PUMP_SENSORS = ("currentWatts", "currentRPM", "currentGPM")

SL_DEVICE_TYPE_TO_HA_DEVICE_CLASS = {
    DEVICE_TYPE.TEMPERATURE: SensorDeviceClass.TEMPERATURE,
    DEVICE_TYPE.ENERGY: SensorDeviceClass.POWER,
}


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up entry."""
    entities = []
    coordinator = hass.data[DOMAIN][config_entry.entry_id]
    equipment_flags = coordinator.data[SL_DATA.KEY_CONFIG]["equipment_flags"]

    # Generic sensors
    for sensor_name, sensor_data in coordinator.data[SL_DATA.KEY_SENSORS].items():
        if sensor_name in ("chem_alarm", "salt_ppm"):
            continue
        if sensor_data["value"] != 0:
            entities.append(ScreenLogicSensor(coordinator, sensor_name))

    # Pump sensors
    for pump_num, pump_data in coordinator.data[SL_DATA.KEY_PUMPS].items():
        if pump_data["data"] != 0 and "currentWatts" in pump_data:
            for pump_key in pump_data:
                enabled = True
                # Assumptions for Intelliflow VF
                if pump_data["pumpType"] == 1 and pump_key == "currentRPM":
                    enabled = False
                # Assumptions for Intelliflow VS
                if pump_data["pumpType"] == 2 and pump_key == "currentGPM":
                    enabled = False
                if pump_key in SUPPORTED_PUMP_SENSORS:
                    entities.append(
                        ScreenLogicPumpSensor(coordinator, pump_num, pump_key, enabled)
                    )

    # IntelliChem sensors
    if equipment_flags & EQUIPMENT.FLAG_INTELLICHEM:
        for chem_sensor_name in coordinator.data[SL_DATA.KEY_CHEMISTRY]:
            enabled = True
            if equipment_flags & EQUIPMENT.FLAG_CHLORINATOR:
                if chem_sensor_name in ("salt_tds_ppm",):
                    enabled = False
            if chem_sensor_name in SUPPORTED_CHEM_SENSORS:
                entities.append(
                    ScreenLogicChemistrySensor(coordinator, chem_sensor_name, enabled)
                )

    # SCG sensors
    if equipment_flags & EQUIPMENT.FLAG_CHLORINATOR:
        entities.extend(
            [
                ScreenLogicSCGSensor(coordinator, scg_sensor)
                for scg_sensor in coordinator.data[SL_DATA.KEY_SCG]
                if scg_sensor in SUPPORTED_SCG_SENSORS
            ]
        )

    async_add_entities(entities)


class ScreenLogicSensor(ScreenlogicEntity, SensorEntity):
    """Representation of the basic ScreenLogic sensor entity."""

    @property
    def name(self):
        """Name of the sensor."""
        return f"{self.gateway_name} {self.sensor['name']}"

    @property
    def native_unit_of_measurement(self):
        """Return the unit of measurement."""
        return self.sensor.get("unit")

    @property
    def device_class(self):
        """Device class of the sensor."""
        device_type = self.sensor.get("device_type")
        return SL_DEVICE_TYPE_TO_HA_DEVICE_CLASS.get(device_type)

    @property
    def state_class(self):
        """Return the state class of the sensor."""
        if self._data_key == "scg_super_chlor_timer":
            return None
        return SensorStateClass.MEASUREMENT

    @property
    def native_value(self):
        """State of the sensor."""
        value = self.sensor["value"]
        return (value - 1) if "supply" in self._data_key else value

    @property
    def sensor(self):
        """Shortcut to access the sensor data."""
        return self.coordinator.data[SL_DATA.KEY_SENSORS][self._data_key]


class ScreenLogicPumpSensor(ScreenLogicSensor):
    """Representation of a ScreenLogic pump sensor entity."""

    def __init__(self, coordinator, pump, key, enabled=True):
        """Initialize of the pump sensor."""
        super().__init__(coordinator, f"{key}_{pump}", enabled)
        self._pump_id = pump
        self._key = key

    @property
    def sensor(self):
        """Shortcut to access the pump sensor data."""
        return self.coordinator.data[SL_DATA.KEY_PUMPS][self._pump_id][self._key]


class ScreenLogicChemistrySensor(ScreenLogicSensor):
    """Representation of a ScreenLogic IntelliChem sensor entity."""

    def __init__(self, coordinator, key, enabled=True):
        """Initialize of the pump sensor."""
        super().__init__(coordinator, f"chem_{key}", enabled)
        self._key = key

    @property
    def native_value(self):
        """State of the sensor."""
        value = self.sensor["value"]
        if "dosing_state" in self._key:
            return CHEM_DOSING_STATE.NAME_FOR_NUM[value]
        return value

    @property
    def sensor(self):
        """Shortcut to access the pump sensor data."""
        return self.coordinator.data[SL_DATA.KEY_CHEMISTRY][self._key]


class ScreenLogicSCGSensor(ScreenLogicSensor):
    """Representation of ScreenLogic SCG sensor entity."""

    @property
    def sensor(self):
        """Shortcut to access the pump sensor data."""
        return self.coordinator.data[SL_DATA.KEY_SCG][self._data_key]
