"""Support for Google Maps location sharing."""
from datetime import timedelta
import logging

from locationsharinglib import Service
from locationsharinglib.locationsharinglibexceptions import InvalidCookies
import voluptuous as vol

from homeassistant.components.device_tracker import PLATFORM_SCHEMA, SOURCE_TYPE_GPS
from homeassistant.const import (
    ATTR_BATTERY_CHARGING,
    ATTR_BATTERY_LEVEL,
    ATTR_ID,
    CONF_SCAN_INTERVAL,
    CONF_USERNAME,
)
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.event import track_time_interval
from homeassistant.helpers.typing import ConfigType
from homeassistant.util import dt as dt_util, slugify

_LOGGER = logging.getLogger(__name__)

ATTR_ADDRESS = "address"
ATTR_FULL_NAME = "full_name"
ATTR_LAST_SEEN = "last_seen"
ATTR_NICKNAME = "nickname"

CONF_MAX_GPS_ACCURACY = "max_gps_accuracy"

CREDENTIALS_FILE = ".google_maps_location_sharing.cookies"

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Required(CONF_USERNAME): cv.string,
        vol.Optional(CONF_MAX_GPS_ACCURACY, default=100000): vol.Coerce(float),
    }
)


def setup_scanner(hass, config: ConfigType, see, discovery_info=None):
    """Set up the Google Maps Location sharing scanner."""
    scanner = GoogleMapsScanner(hass, config, see)
    return scanner.success_init


class GoogleMapsScanner:
    """Representation of an Google Maps location sharing account."""

    def __init__(self, hass, config: ConfigType, see) -> None:
        """Initialize the scanner."""
        self.see = see
        self.username = config[CONF_USERNAME]
        self.max_gps_accuracy = config[CONF_MAX_GPS_ACCURACY]
        self.scan_interval = config.get(CONF_SCAN_INTERVAL) or timedelta(seconds=60)
        self._prev_seen = {}

        credfile = f"{hass.config.path(CREDENTIALS_FILE)}.{slugify(self.username)}"
        try:
            self.service = Service(credfile, self.username)
            self._update_info()

            track_time_interval(hass, self._update_info, self.scan_interval)

            self.success_init = True

        except InvalidCookies:
            _LOGGER.error(
                "The cookie file provided does not provide a valid session. Please create another one and try again"
            )
            self.success_init = False

    def _update_info(self, now=None):
        for person in self.service.get_all_people():
            try:
                dev_id = f"google_maps_{slugify(person.id)}"
            except TypeError:
                _LOGGER.warning("No location(s) shared with this account")
                return

            if (
                self.max_gps_accuracy is not None
                and person.accuracy > self.max_gps_accuracy
            ):
                _LOGGER.info(
                    "Ignoring %s update because expected GPS "
                    "accuracy %s is not met: %s",
                    person.nickname,
                    self.max_gps_accuracy,
                    person.accuracy,
                )
                continue

            last_seen = dt_util.as_utc(person.datetime)
            if last_seen < self._prev_seen.get(dev_id, last_seen):
                _LOGGER.warning(
                    "Ignoring %s update because timestamp "
                    "is older than last timestamp",
                    person.nickname,
                )
                _LOGGER.debug("%s < %s", last_seen, self._prev_seen[dev_id])
                continue
            self._prev_seen[dev_id] = last_seen

            attrs = {
                ATTR_ADDRESS: person.address,
                ATTR_FULL_NAME: person.full_name,
                ATTR_ID: person.id,
                ATTR_LAST_SEEN: last_seen,
                ATTR_NICKNAME: person.nickname,
                ATTR_BATTERY_CHARGING: person.charging,
                ATTR_BATTERY_LEVEL: person.battery_level,
            }
            self.see(
                dev_id=dev_id,
                gps=(person.latitude, person.longitude),
                picture=person.picture_url,
                source_type=SOURCE_TYPE_GPS,
                gps_accuracy=person.accuracy,
                attributes=attrs,
            )
