"""Support for August sensors."""
import logging

from homeassistant.const import (
    DEVICE_CLASS_BATTERY,
    DEVICE_CLASS_POWER,
    ENERGY_KILO_WATT_HOUR,
    UNIT_PERCENTAGE,
)

from .const import (
    ATTR_ENERGY_EXPORTED,
    ATTR_ENERGY_IMPORTED,
    ATTR_FREQUENCY,
    ATTR_INSTANT_AVERAGE_VOLTAGE,
    DOMAIN,
    POWERWALL_API_CHARGE,
    POWERWALL_API_METERS,
    POWERWALL_COORDINATOR,
    POWERWALL_SITE_INFO,
)
from .entity import PowerWallEntity

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(hass, config_entry, async_add_entities):
    """Set up the August sensors."""
    powerwall_data = hass.data[DOMAIN][config_entry.entry_id]
    _LOGGER.debug("Powerwall_data: %s", powerwall_data)

    coordinator = powerwall_data[POWERWALL_COORDINATOR]
    site_info = powerwall_data[POWERWALL_SITE_INFO]

    entities = []
    for meter in coordinator.data[POWERWALL_API_METERS]:
        entities.append(PowerWallEnergySensor(meter, coordinator, site_info))

    entities.append(PowerWallChargeSensor(coordinator, site_info))

    async_add_entities(entities, True)


class PowerWallChargeSensor(PowerWallEntity):
    """Representation of an Powerwall charge sensor."""

    @property
    def unit_of_measurement(self):
        """Return the unit of measurement."""
        return UNIT_PERCENTAGE

    @property
    def name(self):
        """Device Name."""
        return "Powerwall Charge"

    @property
    def device_class(self):
        """Device Class."""
        return DEVICE_CLASS_BATTERY

    @property
    def unique_id(self):
        """Device Uniqueid."""
        return f"{self.base_unique_id}_charge"

    @property
    def state(self):
        """Get the current value in percentage."""
        return round(self._coordinator.data[POWERWALL_API_CHARGE], 3)


class PowerWallEnergySensor(PowerWallEntity):
    """Representation of an Powerwall Energy sensor."""

    def __init__(self, meter, coordinator, site_info):
        """Initialize the sensor."""
        super().__init__(coordinator, site_info)
        self._meter = meter

    @property
    def unit_of_measurement(self):
        """Return the unit of measurement."""
        return ENERGY_KILO_WATT_HOUR

    @property
    def name(self):
        """Device Name."""
        return f"Powerwall {self._meter.title()} Now"

    @property
    def device_class(self):
        """Device Class."""
        return DEVICE_CLASS_POWER

    @property
    def unique_id(self):
        """Device Uniqueid."""
        return f"{self.base_unique_id}_{self._meter}_instant_power"

    @property
    def state(self):
        """Get the current value in kWh."""
        meter = self._coordinator.data[POWERWALL_API_METERS][self._meter]
        return round(float(meter.instant_power / 1000), 3)

    @property
    def device_state_attributes(self):
        """Return the device specific state attributes."""
        meter = self._coordinator.data[POWERWALL_API_METERS][self._meter]
        return {
            ATTR_FREQUENCY: meter.frequency,
            ATTR_ENERGY_EXPORTED: meter.energy_exported,
            ATTR_ENERGY_IMPORTED: meter.energy_imported,
            ATTR_INSTANT_AVERAGE_VOLTAGE: meter.instant_average_voltage,
        }