"""This component provides HA sensor support for Ring Door Bell/Chimes."""
import logging

import voluptuous as vol

from homeassistant.components.sensor import PLATFORM_SCHEMA
from homeassistant.const import (
    ATTR_ATTRIBUTION,
    CONF_ENTITY_NAMESPACE,
    CONF_MONITORED_CONDITIONS,
)
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.entity import Entity
from homeassistant.helpers.icon import icon_for_battery_level
from homeassistant.helpers.dispatcher import async_dispatcher_connect
from homeassistant.core import callback

from . import (
    ATTRIBUTION,
    DATA_RING_CHIMES,
    DATA_RING_DOORBELLS,
    DATA_RING_STICKUP_CAMS,
    DEFAULT_ENTITY_NAMESPACE,
    SIGNAL_UPDATE_RING,
)

_LOGGER = logging.getLogger(__name__)

# Sensor types: Name, category, units, icon, kind
SENSOR_TYPES = {
    "battery": ["Battery", ["doorbell", "stickup_cams"], "%", "battery-50", None],
    "last_activity": [
        "Last Activity",
        ["doorbell", "stickup_cams"],
        None,
        "history",
        None,
    ],
    "last_ding": ["Last Ding", ["doorbell"], None, "history", "ding"],
    "last_motion": [
        "Last Motion",
        ["doorbell", "stickup_cams"],
        None,
        "history",
        "motion",
    ],
    "volume": [
        "Volume",
        ["chime", "doorbell", "stickup_cams"],
        None,
        "bell-ring",
        None,
    ],
    "wifi_signal_category": [
        "WiFi Signal Category",
        ["chime", "doorbell", "stickup_cams"],
        None,
        "wifi",
        None,
    ],
    "wifi_signal_strength": [
        "WiFi Signal Strength",
        ["chime", "doorbell", "stickup_cams"],
        "dBm",
        "wifi",
        None,
    ],
}

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Optional(
            CONF_ENTITY_NAMESPACE, default=DEFAULT_ENTITY_NAMESPACE
        ): cv.string,
        vol.Required(CONF_MONITORED_CONDITIONS, default=list(SENSOR_TYPES)): vol.All(
            cv.ensure_list, [vol.In(SENSOR_TYPES)]
        ),
    }
)


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up a sensor for a Ring device."""
    ring_chimes = hass.data[DATA_RING_CHIMES]
    ring_doorbells = hass.data[DATA_RING_DOORBELLS]
    ring_stickup_cams = hass.data[DATA_RING_STICKUP_CAMS]

    sensors = []
    for device in ring_chimes:
        for sensor_type in config[CONF_MONITORED_CONDITIONS]:
            if "chime" in SENSOR_TYPES[sensor_type][1]:
                sensors.append(RingSensor(hass, device, sensor_type))

    for device in ring_doorbells:
        for sensor_type in config[CONF_MONITORED_CONDITIONS]:
            if "doorbell" in SENSOR_TYPES[sensor_type][1]:
                sensors.append(RingSensor(hass, device, sensor_type))

    for device in ring_stickup_cams:
        for sensor_type in config[CONF_MONITORED_CONDITIONS]:
            if "stickup_cams" in SENSOR_TYPES[sensor_type][1]:
                sensors.append(RingSensor(hass, device, sensor_type))

    add_entities(sensors, True)
    return True


class RingSensor(Entity):
    """A sensor implementation for Ring device."""

    def __init__(self, hass, data, sensor_type):
        """Initialize a sensor for Ring device."""
        super(RingSensor, self).__init__()
        self._sensor_type = sensor_type
        self._data = data
        self._extra = None
        self._icon = "mdi:{}".format(SENSOR_TYPES.get(self._sensor_type)[3])
        self._kind = SENSOR_TYPES.get(self._sensor_type)[4]
        self._name = "{0} {1}".format(
            self._data.name, SENSOR_TYPES.get(self._sensor_type)[0]
        )
        self._state = None
        self._tz = str(hass.config.time_zone)
        self._unique_id = "{}-{}".format(self._data.id, self._sensor_type)

    async def async_added_to_hass(self):
        """Register callbacks."""
        async_dispatcher_connect(self.hass, SIGNAL_UPDATE_RING, self._update_callback)

    @callback
    def _update_callback(self):
        """Call update method."""
        self.async_schedule_update_ha_state(True)

    @property
    def should_poll(self):
        """Return False, updates are controlled via the hub."""
        return False

    @property
    def name(self):
        """Return the name of the sensor."""
        return self._name

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

    @property
    def unique_id(self):
        """Return a unique ID."""
        return self._unique_id

    @property
    def device_state_attributes(self):
        """Return the state attributes."""
        attrs = {}

        attrs[ATTR_ATTRIBUTION] = ATTRIBUTION
        attrs["device_id"] = self._data.id
        attrs["firmware"] = self._data.firmware
        attrs["kind"] = self._data.kind
        attrs["timezone"] = self._data.timezone
        attrs["type"] = self._data.family
        attrs["wifi_name"] = self._data.wifi_name

        if self._extra and self._sensor_type.startswith("last_"):
            attrs["created_at"] = self._extra["created_at"]
            attrs["answered"] = self._extra["answered"]
            attrs["recording_status"] = self._extra["recording"]["status"]
            attrs["category"] = self._extra["kind"]

        return attrs

    @property
    def icon(self):
        """Icon to use in the frontend, if any."""
        if self._sensor_type == "battery" and self._state is not None:
            return icon_for_battery_level(
                battery_level=int(self._state), charging=False
            )
        return self._icon

    @property
    def unit_of_measurement(self):
        """Return the units of measurement."""
        return SENSOR_TYPES.get(self._sensor_type)[2]

    def update(self):
        """Get the latest data and updates the state."""
        _LOGGER.debug("Updating data from %s sensor", self._name)

        if self._sensor_type == "volume":
            self._state = self._data.volume

        if self._sensor_type == "battery":
            self._state = self._data.battery_life

        if self._sensor_type.startswith("last_"):
            history = self._data.history(
                limit=5, timezone=self._tz, kind=self._kind, enforce_limit=True
            )
            if history:
                self._extra = history[0]
                created_at = self._extra["created_at"]
                self._state = "{0:0>2}:{1:0>2}".format(
                    created_at.hour, created_at.minute
                )

        if self._sensor_type == "wifi_signal_category":
            self._state = self._data.wifi_signal_category

        if self._sensor_type == "wifi_signal_strength":
            self._state = self._data.wifi_signal_strength
