"""Support for Plex media server monitoring."""
from datetime import timedelta
import logging
import voluptuous as vol

from homeassistant.components.switch import PLATFORM_SCHEMA
from homeassistant.const import (
    CONF_NAME,
    CONF_USERNAME,
    CONF_PASSWORD,
    CONF_HOST,
    CONF_PORT,
    CONF_TOKEN,
    CONF_SSL,
    CONF_VERIFY_SSL,
)
from homeassistant.helpers.entity import Entity
from homeassistant.util import Throttle
import homeassistant.helpers.config_validation as cv

_LOGGER = logging.getLogger(__name__)

CONF_SERVER = "server"

DEFAULT_HOST = "localhost"
DEFAULT_NAME = "Plex"
DEFAULT_PORT = 32400
DEFAULT_SSL = False
DEFAULT_VERIFY_SSL = True

MIN_TIME_BETWEEN_UPDATES = timedelta(minutes=1)

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
    {
        vol.Optional(CONF_HOST, default=DEFAULT_HOST): cv.string,
        vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
        vol.Optional(CONF_PASSWORD): cv.string,
        vol.Optional(CONF_TOKEN): cv.string,
        vol.Optional(CONF_PORT, default=DEFAULT_PORT): cv.port,
        vol.Optional(CONF_SERVER): cv.string,
        vol.Optional(CONF_USERNAME): cv.string,
        vol.Optional(CONF_SSL, default=DEFAULT_SSL): cv.boolean,
        vol.Optional(CONF_VERIFY_SSL, default=DEFAULT_VERIFY_SSL): cv.boolean,
    }
)


def setup_platform(hass, config, add_entities, discovery_info=None):
    """Set up the Plex sensor."""
    name = config.get(CONF_NAME)
    plex_user = config.get(CONF_USERNAME)
    plex_password = config.get(CONF_PASSWORD)
    plex_server = config.get(CONF_SERVER)
    plex_host = config.get(CONF_HOST)
    plex_port = config.get(CONF_PORT)
    plex_token = config.get(CONF_TOKEN)

    plex_url = "{}://{}:{}".format(
        "https" if config.get(CONF_SSL) else "http", plex_host, plex_port
    )

    import plexapi.exceptions

    try:
        add_entities(
            [
                PlexSensor(
                    name,
                    plex_url,
                    plex_user,
                    plex_password,
                    plex_server,
                    plex_token,
                    config.get(CONF_VERIFY_SSL),
                )
            ],
            True,
        )
    except (
        plexapi.exceptions.BadRequest,
        plexapi.exceptions.Unauthorized,
        plexapi.exceptions.NotFound,
    ) as error:
        _LOGGER.error(error)
        return


class PlexSensor(Entity):
    """Representation of a Plex now playing sensor."""

    def __init__(
        self,
        name,
        plex_url,
        plex_user,
        plex_password,
        plex_server,
        plex_token,
        verify_ssl,
    ):
        """Initialize the sensor."""
        from plexapi.myplex import MyPlexAccount
        from plexapi.server import PlexServer
        from requests import Session

        self._name = name
        self._state = 0
        self._now_playing = []

        cert_session = None
        if not verify_ssl:
            _LOGGER.info("Ignoring SSL verification")
            cert_session = Session()
            cert_session.verify = False

        if plex_token:
            self._server = PlexServer(plex_url, plex_token, cert_session)
        elif plex_user and plex_password:
            user = MyPlexAccount(plex_user, plex_password)
            server = plex_server if plex_server else user.resources()[0].name
            self._server = user.resource(server).connect()
        else:
            self._server = PlexServer(plex_url, None, cert_session)

    @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 unit_of_measurement(self):
        """Return the unit this state is expressed in."""
        return "Watching"

    @property
    def device_state_attributes(self):
        """Return the state attributes."""
        return {content[0]: content[1] for content in self._now_playing}

    @Throttle(MIN_TIME_BETWEEN_UPDATES)
    def update(self):
        """Update method for Plex sensor."""
        sessions = self._server.sessions()
        now_playing = []
        for sess in sessions:
            user = sess.usernames[0]
            device = sess.players[0].title
            now_playing_user = "{0} - {1}".format(user, device)
            now_playing_title = ""

            if sess.TYPE == "episode":
                # example:
                # "Supernatural (2005) - S01 · E13 - Route 666"
                season_title = sess.grandparentTitle
                if sess.show().year is not None:
                    season_title += " ({0})".format(sess.show().year)
                season_episode = "S{0}".format(sess.parentIndex)
                if sess.index is not None:
                    season_episode += " · E{0}".format(sess.index)
                episode_title = sess.title
                now_playing_title = "{0} - {1} - {2}".format(
                    season_title, season_episode, episode_title
                )
            elif sess.TYPE == "track":
                # example:
                # "Billy Talent - Afraid of Heights - Afraid of Heights"
                track_artist = sess.grandparentTitle
                track_album = sess.parentTitle
                track_title = sess.title
                now_playing_title = "{0} - {1} - {2}".format(
                    track_artist, track_album, track_title
                )
            else:
                # example:
                # "picture_of_last_summer_camp (2015)"
                # "The Incredible Hulk (2008)"
                now_playing_title = sess.title
                if sess.year is not None:
                    now_playing_title += " ({0})".format(sess.year)

            now_playing.append((now_playing_user, now_playing_title))
        self._state = len(sessions)
        self._now_playing = now_playing