"""Support for OpenUV sensors."""
import logging

from homeassistant.const import TIME_MINUTES, UV_INDEX
from homeassistant.core import callback
from homeassistant.util.dt import as_local, parse_datetime

from . import (
    DATA_OPENUV_CLIENT,
    DATA_UV,
    DOMAIN,
    TYPE_CURRENT_OZONE_LEVEL,
    TYPE_CURRENT_UV_INDEX,
    TYPE_CURRENT_UV_LEVEL,
    TYPE_MAX_UV_INDEX,
    TYPE_SAFE_EXPOSURE_TIME_1,
    TYPE_SAFE_EXPOSURE_TIME_2,
    TYPE_SAFE_EXPOSURE_TIME_3,
    TYPE_SAFE_EXPOSURE_TIME_4,
    TYPE_SAFE_EXPOSURE_TIME_5,
    TYPE_SAFE_EXPOSURE_TIME_6,
    OpenUvEntity,
)

_LOGGER = logging.getLogger(__name__)

ATTR_MAX_UV_TIME = "time"

EXPOSURE_TYPE_MAP = {
    TYPE_SAFE_EXPOSURE_TIME_1: "st1",
    TYPE_SAFE_EXPOSURE_TIME_2: "st2",
    TYPE_SAFE_EXPOSURE_TIME_3: "st3",
    TYPE_SAFE_EXPOSURE_TIME_4: "st4",
    TYPE_SAFE_EXPOSURE_TIME_5: "st5",
    TYPE_SAFE_EXPOSURE_TIME_6: "st6",
}

UV_LEVEL_EXTREME = "Extreme"
UV_LEVEL_VHIGH = "Very High"
UV_LEVEL_HIGH = "High"
UV_LEVEL_MODERATE = "Moderate"
UV_LEVEL_LOW = "Low"

SENSORS = {
    TYPE_CURRENT_OZONE_LEVEL: ("Current Ozone Level", "mdi:vector-triangle", "du"),
    TYPE_CURRENT_UV_INDEX: ("Current UV Index", "mdi:weather-sunny", UV_INDEX),
    TYPE_CURRENT_UV_LEVEL: ("Current UV Level", "mdi:weather-sunny", None),
    TYPE_MAX_UV_INDEX: ("Max UV Index", "mdi:weather-sunny", UV_INDEX),
    TYPE_SAFE_EXPOSURE_TIME_1: (
        "Skin Type 1 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
    TYPE_SAFE_EXPOSURE_TIME_2: (
        "Skin Type 2 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
    TYPE_SAFE_EXPOSURE_TIME_3: (
        "Skin Type 3 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
    TYPE_SAFE_EXPOSURE_TIME_4: (
        "Skin Type 4 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
    TYPE_SAFE_EXPOSURE_TIME_5: (
        "Skin Type 5 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
    TYPE_SAFE_EXPOSURE_TIME_6: (
        "Skin Type 6 Safe Exposure Time",
        "mdi:timer",
        TIME_MINUTES,
    ),
}


async def async_setup_entry(hass, entry, async_add_entities):
    """Set up a Nest sensor based on a config entry."""
    openuv = hass.data[DOMAIN][DATA_OPENUV_CLIENT][entry.entry_id]

    sensors = []
    for kind, attrs in SENSORS.items():
        name, icon, unit = attrs
        sensors.append(OpenUvSensor(openuv, kind, name, icon, unit, entry.entry_id))

    async_add_entities(sensors, True)


class OpenUvSensor(OpenUvEntity):
    """Define a binary sensor for OpenUV."""

    def __init__(self, openuv, sensor_type, name, icon, unit, entry_id):
        """Initialize the sensor."""
        super().__init__(openuv)

        self._async_unsub_dispatcher_connect = None
        self._entry_id = entry_id
        self._icon = icon
        self._latitude = openuv.client.latitude
        self._longitude = openuv.client.longitude
        self._name = name
        self._sensor_type = sensor_type
        self._state = None
        self._unit = unit

    @property
    def icon(self):
        """Return the icon."""
        return self._icon

    @property
    def should_poll(self):
        """Disable polling."""
        return False

    @property
    def state(self):
        """Return the status of the sensor."""
        return self._state

    @property
    def unique_id(self) -> str:
        """Return a unique, Home Assistant friendly identifier for this entity."""
        return f"{self._latitude}_{self._longitude}_{self._sensor_type}"

    @property
    def unit_of_measurement(self):
        """Return the unit the value is expressed in."""
        return self._unit

    @callback
    def update_from_latest_data(self):
        """Update the state."""
        data = self.openuv.data[DATA_UV].get("result")

        if not data:
            self._available = False
            return

        self._available = True

        if self._sensor_type == TYPE_CURRENT_OZONE_LEVEL:
            self._state = data["ozone"]
        elif self._sensor_type == TYPE_CURRENT_UV_INDEX:
            self._state = data["uv"]
        elif self._sensor_type == TYPE_CURRENT_UV_LEVEL:
            if data["uv"] >= 11:
                self._state = UV_LEVEL_EXTREME
            elif data["uv"] >= 8:
                self._state = UV_LEVEL_VHIGH
            elif data["uv"] >= 6:
                self._state = UV_LEVEL_HIGH
            elif data["uv"] >= 3:
                self._state = UV_LEVEL_MODERATE
            else:
                self._state = UV_LEVEL_LOW
        elif self._sensor_type == TYPE_MAX_UV_INDEX:
            self._state = data["uv_max"]
            self._attrs.update(
                {ATTR_MAX_UV_TIME: as_local(parse_datetime(data["uv_max_time"]))}
            )
        elif self._sensor_type in (
            TYPE_SAFE_EXPOSURE_TIME_1,
            TYPE_SAFE_EXPOSURE_TIME_2,
            TYPE_SAFE_EXPOSURE_TIME_3,
            TYPE_SAFE_EXPOSURE_TIME_4,
            TYPE_SAFE_EXPOSURE_TIME_5,
            TYPE_SAFE_EXPOSURE_TIME_6,
        ):
            self._state = data["safe_exposure_time"][
                EXPOSURE_TYPE_MAP[self._sensor_type]
            ]
