"""Support for Google Maps location sharing."""
from __future__ import annotations

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 as PLATFORM_SCHEMA_BASE,
    SeeCallback,
    SourceType,
)
from homeassistant.const import (
    ATTR_BATTERY_CHARGING,
    ATTR_BATTERY_LEVEL,
    ATTR_ID,
    CONF_SCAN_INTERVAL,
    CONF_USERNAME,
)
from homeassistant.core import HomeAssistant
import homeassistant.helpers.config_validation as cv
from homeassistant.helpers.event import track_time_interval
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
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"

# the parent "device_tracker" have marked the schemas as legacy, so this
# need to be refactored as part of a bigger rewrite.
PLATFORM_SCHEMA = PLATFORM_SCHEMA_BASE.extend(
    {
        vol.Required(CONF_USERNAME): cv.string,
        vol.Optional(CONF_MAX_GPS_ACCURACY, default=100000): vol.Coerce(float),
    }
)


def setup_scanner(
    hass: HomeAssistant,
    config: ConfigType,
    see: SeeCallback,
    discovery_info: DiscoveryInfoType | None = None,
) -> bool:
    """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: HomeAssistant, config: ConfigType, see: SeeCallback
    ) -> 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: dict[str, str] = {}

        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=SourceType.GPS,
                gps_accuracy=person.accuracy,
                attributes=attrs,
            )
