"""
Volumio Platform.

For more details about this platform, please refer to the documentation at
https://home-assistant.io/components/media_player.volumio/

Volumio rest API: https://volumio.github.io/docs/API/REST_API.html
"""
import asyncio
from datetime import timedelta
import logging
import socket

import aiohttp
import voluptuous as vol

from homeassistant.components.media_player import (
    MediaPlayerDevice, PLATFORM_SCHEMA)
from homeassistant.components.media_player.const import (
    MEDIA_TYPE_MUSIC, SUPPORT_CLEAR_PLAYLIST,
    SUPPORT_NEXT_TRACK, SUPPORT_PAUSE, SUPPORT_PLAY, SUPPORT_PLAY_MEDIA,
    SUPPORT_PREVIOUS_TRACK, SUPPORT_SEEK, SUPPORT_SELECT_SOURCE, SUPPORT_STOP,
    SUPPORT_VOLUME_MUTE, SUPPORT_VOLUME_SET, SUPPORT_VOLUME_STEP)
from homeassistant.const import (
    CONF_HOST, CONF_NAME, CONF_PORT, STATE_IDLE, STATE_PAUSED, STATE_PLAYING)
from homeassistant.helpers.aiohttp_client import async_get_clientsession
import homeassistant.helpers.config_validation as cv
from homeassistant.util import Throttle

_CONFIGURING = {}
_LOGGER = logging.getLogger(__name__)

DEFAULT_HOST = 'localhost'
DEFAULT_NAME = 'Volumio'
DEFAULT_PORT = 3000

DATA_VOLUMIO = 'volumio'

TIMEOUT = 10

SUPPORT_VOLUMIO = SUPPORT_PAUSE | SUPPORT_VOLUME_SET | SUPPORT_VOLUME_MUTE | \
    SUPPORT_PREVIOUS_TRACK | SUPPORT_NEXT_TRACK | SUPPORT_SEEK | \
    SUPPORT_PLAY_MEDIA | SUPPORT_STOP | SUPPORT_PLAY | \
    SUPPORT_VOLUME_STEP | SUPPORT_SELECT_SOURCE | SUPPORT_CLEAR_PLAYLIST

PLAYLIST_UPDATE_INTERVAL = timedelta(seconds=15)

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_PORT, default=DEFAULT_PORT): cv.port,
})


async def async_setup_platform(hass, config, async_add_entities,
                               discovery_info=None):
    """Set up the Volumio platform."""
    if DATA_VOLUMIO not in hass.data:
        hass.data[DATA_VOLUMIO] = dict()

    # This is a manual configuration?
    if discovery_info is None:
        name = config.get(CONF_NAME)
        host = config.get(CONF_HOST)
        port = config.get(CONF_PORT)
    else:
        name = "{} ({})".format(DEFAULT_NAME, discovery_info.get('hostname'))
        host = discovery_info.get('host')
        port = discovery_info.get('port')

    # Only add a device once, so discovered devices do not override manual
    # config.
    ip_addr = socket.gethostbyname(host)
    if ip_addr in hass.data[DATA_VOLUMIO]:
        return

    entity = Volumio(name, host, port, hass)

    hass.data[DATA_VOLUMIO][ip_addr] = entity
    async_add_entities([entity])


class Volumio(MediaPlayerDevice):
    """Volumio Player Object."""

    def __init__(self, name, host, port, hass):
        """Initialize the media player."""
        self.host = host
        self.port = port
        self.hass = hass
        self._url = '{}:{}'.format(host, str(port))
        self._name = name
        self._state = {}
        self._lastvol = self._state.get('volume', 0)
        self._playlists = []
        self._currentplaylist = None

    async def send_volumio_msg(self, method, params=None):
        """Send message."""
        url = "http://{}:{}/api/v1/{}/".format(self.host, self.port, method)

        _LOGGER.debug("URL: %s params: %s", url, params)

        try:
            websession = async_get_clientsession(self.hass)
            response = await websession.get(url, params=params)
            if response.status == 200:
                data = await response.json()
            else:
                _LOGGER.error(
                    "Query failed, response code: %s Full message: %s",
                    response.status, response)
                return False

        except (asyncio.TimeoutError, aiohttp.ClientError) as error:
            _LOGGER.error(
                "Failed communicating with Volumio '%s': %s",
                self._name, type(error))
            return False

        try:
            return data
        except AttributeError:
            _LOGGER.error("Received invalid response: %s", data)
            return False

    async def async_update(self):
        """Update state."""
        resp = await self.send_volumio_msg('getState')
        await self._async_update_playlists()
        if resp is False:
            return
        self._state = resp.copy()

    @property
    def media_content_type(self):
        """Content type of current playing media."""
        return MEDIA_TYPE_MUSIC

    @property
    def state(self):
        """Return the state of the device."""
        status = self._state.get('status', None)
        if status == 'pause':
            return STATE_PAUSED
        if status == 'play':
            return STATE_PLAYING

        return STATE_IDLE

    @property
    def media_title(self):
        """Title of current playing media."""
        return self._state.get('title', None)

    @property
    def media_artist(self):
        """Artist of current playing media (Music track only)."""
        return self._state.get('artist', None)

    @property
    def media_album_name(self):
        """Artist of current playing media (Music track only)."""
        return self._state.get('album', None)

    @property
    def media_image_url(self):
        """Image url of current playing media."""
        url = self._state.get('albumart', None)
        if url is None:
            return
        if str(url[0:2]).lower() == 'ht':
            mediaurl = url
        else:
            mediaurl = "http://{}:{}{}".format(self.host, self.port, url)
        return mediaurl

    @property
    def media_seek_position(self):
        """Time in seconds of current seek position."""
        return self._state.get('seek', None)

    @property
    def media_duration(self):
        """Time in seconds of current song duration."""
        return self._state.get('duration', None)

    @property
    def volume_level(self):
        """Volume level of the media player (0..1)."""
        volume = self._state.get('volume', None)
        if volume is not None and volume != "":
            volume = int(volume) / 100
        return volume

    @property
    def is_volume_muted(self):
        """Boolean if volume is currently muted."""
        return self._state.get('mute', None)

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

    @property
    def source_list(self):
        """Return the list of available input sources."""
        return self._playlists

    @property
    def source(self):
        """Name of the current input source."""
        return self._currentplaylist

    @property
    def supported_features(self):
        """Flag of media commands that are supported."""
        return SUPPORT_VOLUMIO

    def async_media_next_track(self):
        """Send media_next command to media player."""
        return self.send_volumio_msg('commands', params={'cmd': 'next'})

    def async_media_previous_track(self):
        """Send media_previous command to media player."""
        return self.send_volumio_msg('commands', params={'cmd': 'prev'})

    def async_media_play(self):
        """Send media_play command to media player."""
        return self.send_volumio_msg('commands', params={'cmd': 'play'})

    def async_media_pause(self):
        """Send media_pause command to media player."""
        if self._state['trackType'] == 'webradio':
            return self.send_volumio_msg('commands', params={'cmd': 'stop'})
        return self.send_volumio_msg('commands', params={'cmd': 'pause'})

    def async_set_volume_level(self, volume):
        """Send volume_up command to media player."""
        return self.send_volumio_msg(
            'commands', params={'cmd': 'volume', 'volume': int(volume * 100)})

    def async_volume_up(self):
        """Service to send the Volumio the command for volume up."""
        return self.send_volumio_msg(
            'commands', params={'cmd': 'volume', 'volume': 'plus'})

    def async_volume_down(self):
        """Service to send the Volumio the command for volume down."""
        return self.send_volumio_msg(
            'commands', params={'cmd': 'volume', 'volume': 'minus'})

    def async_mute_volume(self, mute):
        """Send mute command to media player."""
        mutecmd = 'mute' if mute else 'unmute'
        if mute:
            # mute is implemented as 0 volume, do save last volume level
            self._lastvol = self._state['volume']
            return self.send_volumio_msg(
                'commands', params={'cmd': 'volume', 'volume': mutecmd})

        return self.send_volumio_msg(
            'commands', params={'cmd': 'volume', 'volume': self._lastvol})

    def async_select_source(self, source):
        """Choose a different available playlist and play it."""
        self._currentplaylist = source
        return self.send_volumio_msg(
            'commands', params={'cmd': 'playplaylist', 'name': source})

    def async_clear_playlist(self):
        """Clear players playlist."""
        self._currentplaylist = None
        return self.send_volumio_msg('commands',
                                     params={'cmd': 'clearQueue'})

    @Throttle(PLAYLIST_UPDATE_INTERVAL)
    async def _async_update_playlists(self, **kwargs):
        """Update available Volumio playlists."""
        self._playlists = await self.send_volumio_msg('listplaylists')