# -*- coding: utf-8 -*-
from logging import getLogger
from urllib import urlencode
from ast import literal_eval
from urlparse import urlparse, parse_qsl
from urllib import quote_plus
import re
from copy import deepcopy

from downloadutils import DownloadUtils
from utils import settings, tryEncode
from variables import PLEX_TO_KODI_TIMEFACTOR

###############################################################################

log = getLogger("PLEX."+__name__)

CONTAINERSIZE = int(settings('limitindex'))

###############################################################################


def ConvertPlexToKodiTime(plexTime):
    """
    Converts Plextime to Koditime. Returns an int (in seconds).
    """
    if plexTime is None:
        return None
    return int(float(plexTime) * PLEX_TO_KODI_TIMEFACTOR)


def GetPlexKeyNumber(plexKey):
    """
    Deconstructs e.g. '/library/metadata/xxxx' to the tuple

        ('library/metadata', 'xxxx')

    Returns ('','') if nothing is found
    """
    regex = re.compile(r'''/(.+)/(\d+)$''')
    try:
        result = regex.findall(plexKey)[0]
    except IndexError:
        result = ('', '')
    return result


def ParseContainerKey(containerKey):
    """
    Parses e.g. /playQueues/3045?own=1&repeat=0&window=200 to:
    'playQueues', '3045', {'window': '200', 'own': '1', 'repeat': '0'}

    Output hence: library, key, query       (str, str, dict)
    """
    result = urlparse(containerKey)
    library, key = GetPlexKeyNumber(result.path)
    query = dict(parse_qsl(result.query))
    return library, key, query


def LiteralEval(string):
    """
    Turns a string e.g. in a dict, safely :-)
    """
    return literal_eval(string)


def GetMethodFromPlexType(plexType):
    methods = {
        'movie': 'add_update',
        'episode': 'add_updateEpisode',
        'show': 'add_update',
        'season': 'add_updateSeason',
        'track': 'add_updateSong',
        'album': 'add_updateAlbum',
        'artist': 'add_updateArtist'
    }
    return methods[plexType]


def XbmcItemtypes():
    return ['photo', 'video', 'audio']


def PlexItemtypes():
    return ['photo', 'video', 'audio']


def PlexLibraryItemtypes():
    return ['movie', 'show']
    # later add: 'artist', 'photo'


def EmbyItemtypes():
    return ['Movie', 'Series', 'Season', 'Episode']


def SelectStreams(url, args):
    """
    Does a PUT request to tell the PMS what audio and subtitle streams we have
    chosen.
    """
    DownloadUtils().downloadUrl(
        url + '?' + urlencode(args), action_type='PUT')


def check_connection(url, token=None, verifySSL=None):
    """
    Checks connection to a Plex server, available at url. Can also be used
    to check for connection with plex.tv.

    Override SSL to skip the check by setting verifySSL=False
    if 'None', SSL will be checked (standard requests setting)
    if 'True', SSL settings from file settings are used (False/True)

    Input:
        url         URL to Plex server (e.g. https://192.168.1.1:32400)
        token       appropriate token to access server. If None is passed,
                    the current token is used
    Output:
        False       if server could not be reached or timeout occured
        200         if connection was successfull
        int         or other HTML status codes as received from the server
    """
    headerOptions = {'X-Plex-Token': token} if token is not None else None
    if verifySSL is True:
        verifySSL = None if settings('sslverify') == 'true' \
            else False
    if 'plex.tv' in url:
        url = 'https://plex.tv/api/home/users'
    else:
        url = url + '/library/onDeck'
    log.debug("Checking connection to server %s with verifySSL=%s"
              % (url, verifySSL))
    answer = DownloadUtils().downloadUrl(url,
                                         authenticate=False,
                                         headerOptions=headerOptions,
                                         verifySSL=verifySSL)
    if answer is None:
        log.debug("Could not connect to %s" % url)
        return False
    try:
        # xml received?
        answer.attrib
    except:
        if answer is True:
            # Maybe no xml but connection was successful nevertheless
            answer = 200
    else:
        # Success - we downloaded an xml!
        answer = 200
    # We could connect but maybe were not authenticated. No worries
    log.debug("Checking connection successfull. Answer: %s" % answer)
    return answer


def GetPlexMetadata(key):
    """
    Returns raw API metadata for key as an etree XML.

    Can be called with either Plex key '/library/metadata/xxxx'metadata
    OR with the digits 'xxxx' only.

    Returns None or 401 if something went wrong
    """
    key = str(key)
    if '/library/metadata/' in key:
        url = "{server}" + key
    else:
        url = "{server}/library/metadata/" + key
    arguments = {
        'checkFiles': 0,
        'includeExtras': 1,         # Trailers and Extras => Extras
        'includeReviews': 1,
        'includeRelated': 0,        # Similar movies => Video -> Related
        # 'includeRelatedCount': 0,
        # 'includeOnDeck': 1,
        # 'includeChapters': 1,
        # 'includePopularLeaves': 1,
        # 'includeConcerts': 1
    }
    url = url + '?' + urlencode(arguments)
    xml = DownloadUtils().downloadUrl(url)
    if xml == 401:
        # Either unauthorized (taken care of by doUtils) or PMS under strain
        return 401
    # Did we receive a valid XML?
    try:
        xml.attrib
    # Nope we did not receive a valid XML
    except AttributeError:
        log.error("Error retrieving metadata for %s" % url)
        xml = None
    return xml


def GetAllPlexChildren(key):
    """
    Returns a list (raw xml API dump) of all Plex children for the key.
    (e.g. /library/metadata/194853/children pointing to a season)

    Input:
        key             Key to a Plex item, e.g. 12345
    """
    return DownloadChunks("{server}/library/metadata/%s/children?" % key)


def GetPlexSectionResults(viewId, args=None):
    """
    Returns a list (XML API dump) of all Plex items in the Plex
    section with key = viewId.

    Input:
        args:       optional dict to be urlencoded

    Returns None if something went wrong
    """
    url = "{server}/library/sections/%s/all?" % viewId
    if args:
        url += urlencode(args) + '&'
    return DownloadChunks(url)


def DownloadChunks(url):
    """
    Downloads PMS url in chunks of CONTAINERSIZE.

    url MUST end with '?' (if no other url encoded args are present) or '&'

    Returns a stitched-together xml or None.
    """
    xml = None
    pos = 0
    errorCounter = 0
    while errorCounter < 10:
        args = {
            'X-Plex-Container-Size': CONTAINERSIZE,
            'X-Plex-Container-Start': pos
        }
        xmlpart = DownloadUtils().downloadUrl(url + urlencode(args))
        # If something went wrong - skip in the hope that it works next time
        try:
            xmlpart.attrib
        except AttributeError:
            log.error('Error while downloading chunks: %s'
                      % (url + urlencode(args)))
            pos += CONTAINERSIZE
            errorCounter += 1
            continue

        # Very first run: starting xml (to retain data in xml's root!)
        if xml is None:
            xml = deepcopy(xmlpart)
            if len(xmlpart) < CONTAINERSIZE:
                break
            else:
                pos += CONTAINERSIZE
                continue
        # Build answer xml - containing the entire library
        for child in xmlpart:
            xml.append(child)
        # Done as soon as we don't receive a full complement of items
        if len(xmlpart) < CONTAINERSIZE:
            break
        pos += CONTAINERSIZE
    if errorCounter == 10:
        log.error('Fatal error while downloading chunks for %s' % url)
        return None
    return xml


def GetAllPlexLeaves(viewId, lastViewedAt=None, updatedAt=None):
    """
    Returns a list (raw XML API dump) of all Plex subitems for the key.
    (e.g. /library/sections/2/allLeaves pointing to all TV shows)

    Input:
        viewId              Id of Plex library, e.g. '2'
        lastViewedAt        Unix timestamp; only retrieves PMS items viewed
                            since that point of time until now.
        updatedAt           Unix timestamp; only retrieves PMS items updated
                            by the PMS since that point of time until now.

    If lastViewedAt and updatedAt=None, ALL PMS items are returned.

    Warning: lastViewedAt and updatedAt are combined with AND by the PMS!

    Relevant "master time": PMS server. I guess this COULD lead to problems,
    e.g. when server and client are in different time zones.
    """
    args = []
    url = "{server}/library/sections/%s/allLeaves" % viewId

    if lastViewedAt:
        args.append('lastViewedAt>=%s' % lastViewedAt)
    if updatedAt:
        args.append('updatedAt>=%s' % updatedAt)
    if args:
        url += '?' + '&'.join(args) + '&'
    else:
        url += '?'
    return DownloadChunks(url)


def GetPlexOnDeck(viewId):
    """
    """
    return DownloadChunks("{server}/library/sections/%s/onDeck?" % viewId)


def get_plex_sections():
    """
    Returns all Plex sections (libraries) of the PMS as an etree xml
    """
    return DownloadUtils().downloadUrl('{server}/library/sections')


def init_plex_playqueue(itemid, librarySectionUUID, mediatype='movie',
                        trailers=False):
    """
    Returns raw API metadata XML dump for a playlist with e.g. trailers.
   """
    url = "{server}/playQueues"
    args = {
        'type': mediatype,
        'uri': ('library://' + librarySectionUUID +
                '/item/%2Flibrary%2Fmetadata%2F' + itemid),
        'includeChapters': '1',
        'shuffle': '0',
        'repeat': '0'
    }
    if trailers is True:
        args['extrasPrefixCount'] = settings('trailerNumber')
    xml = DownloadUtils().downloadUrl(
        url + '?' + urlencode(args), action_type="POST")
    try:
        xml[0].tag
    except (IndexError, TypeError, AttributeError):
        log.error("Error retrieving metadata for %s" % url)
        return None
    return xml


def getPlexRepeat(kodiRepeat):
    plexRepeat = {
        'off': '0',
        'one': '1',
        'all': '2'   # does this work?!?
    }
    return plexRepeat.get(kodiRepeat)


def PMSHttpsEnabled(url):
    """
    Returns True if the PMS can talk https, False otherwise.
    None if error occured, e.g. the connection timed out

    Call with e.g. url='192.168.0.1:32400' (NO http/https)

    This is done by GET /identity (returns an error if https is enabled and we
    are trying to use http)

    Prefers HTTPS over HTTP
    """
    doUtils = DownloadUtils().downloadUrl
    res = doUtils('https://%s/identity' % url,
                  authenticate=False,
                  verifySSL=False)
    try:
        res.attrib
    except AttributeError:
        # Might have SSL deactivated. Try with http
        res = doUtils('http://%s/identity' % url,
                      authenticate=False,
                      verifySSL=False)
        try:
            res.attrib
        except AttributeError:
            log.error("Could not contact PMS %s" % url)
            return None
        else:
            # Received a valid XML. Server wants to talk HTTP
            return False
    else:
        # Received a valid XML. Server wants to talk HTTPS
        return True


def GetMachineIdentifier(url):
    """
    Returns the unique PMS machine identifier of url

    Returns None if something went wrong
    """
    xml = DownloadUtils().downloadUrl('%s/identity' % url,
                                      authenticate=False,
                                      verifySSL=False,
                                      timeout=10)
    try:
        machineIdentifier = xml.attrib['machineIdentifier']
    except (AttributeError, KeyError):
        log.error('Could not get the PMS machineIdentifier for %s' % url)
        return None
    log.debug('Found machineIdentifier %s for the PMS %s'
              % (machineIdentifier, url))
    return machineIdentifier


def GetPMSStatus(token):
    """
    token:                  Needs to be authorized with a master Plex token
                            (not a managed user token)!
    Calls /status/sessions on currently active PMS. Returns a dict with:

    'sessionKey':
    {
        'userId':           Plex ID of the user (if applicable, otherwise '')
        'username':         Plex name (if applicable, otherwise '')
        'ratingKey':        Unique Plex id of item being played
    }

    or an empty dict.
    """
    answer = {}
    xml = DownloadUtils().downloadUrl(
        '{server}/status/sessions',
        headerOptions={'X-Plex-Token': token})
    try:
        xml.attrib
    except AttributeError:
        return answer
    for item in xml:
        ratingKey = item.attrib.get('ratingKey')
        sessionKey = item.attrib.get('sessionKey')
        userId = item.find('User')
        username = ''
        if userId is not None:
            username = userId.attrib.get('title', '')
            userId = userId.attrib.get('id', '')
        else:
            userId = ''
        answer[sessionKey] = {
            'userId': userId,
            'username': username,
            'ratingKey': ratingKey
        }
    return answer


def scrobble(ratingKey, state):
    """
    Tells the PMS to set an item's watched state to state="watched" or
    state="unwatched"
    """
    args = {
        'key': ratingKey,
        'identifier': 'com.plexapp.plugins.library'
    }
    if state == "watched":
        url = "{server}/:/scrobble?" + urlencode(args)
    elif state == "unwatched":
        url = "{server}/:/unscrobble?" + urlencode(args)
    else:
        return
    DownloadUtils().downloadUrl(url)
    log.info("Toggled watched state for Plex item %s" % ratingKey)


def delete_item_from_pms(plexid):
    """
    Deletes the item plexid from the Plex Media Server (and the harddrive!).
    Do make sure that the currently logged in user has the credentials

    Returns True if successful, False otherwise
    """
    if DownloadUtils().downloadUrl(
            '{server}/library/metadata/%s' % plexid,
            action_type="DELETE") is True:
        log.info('Successfully deleted Plex id %s from the PMS' % plexid)
        return True
    else:
        log.error('Could not delete Plex id %s from the PMS' % plexid)
        return False


def get_pms_settings(url, token):
    """
    Retrieve the PMS' settings via <url>/:/

    Call with url: scheme://ip:port
    """
    return DownloadUtils().downloadUrl(
        '%s/:/prefs' % url,
        authenticate=False,
        verifySSL=False,
        headerOptions={'X-Plex-Token': token} if token else None)


def get_transcode_image_path(self, key, AuthToken, path, width, height):
    """
    Transcode Image support

    parameters:
        key
        AuthToken
        path - source path of current XML: path[srcXML]
        width
        height
    result:
        final path to image file
    """
    # external address - can we get a transcoding request for external images?
    if key.startswith('http://') or key.startswith('https://'):
        path = key
    elif key.startswith('/'):  # internal full path.
        path = 'http://127.0.0.1:32400' + key
    else:  # internal path, add-on
        path = 'http://127.0.0.1:32400' + path + '/' + key
    path = tryEncode(path)

    # This is bogus (note the extra path component) but ATV is stupid when it
    # comes to caching images, it doesn't use querystrings. Fortunately PMS is
    # lenient...
    transcodePath = '/photo/:/transcode/' + \
        str(width) + 'x' + str(height) + '/' + quote_plus(path)

    args = dict()
    args['width'] = width
    args['height'] = height
    args['url'] = path

    if not AuthToken == '':
        args['X-Plex-Token'] = AuthToken

    return transcodePath + '?' + urlencode(args)