# Author: Nic Wolfe <nic@wolfeden.ca>
# URL: http://code.google.com/p/sickbeard/
#
# This file is part of SickGear.
#
# SickGear is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# SickGear is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with SickGear.  If not, see <http://www.gnu.org/licenses/>.

import datetime
import os
import re

import sickbeard

import generic

from sickbeard import logger, exceptions, helpers
from sickbeard import encodingKludge as ek

from sickbeard.exceptions import ex

import xml.etree.cElementTree as etree
from six import iteritems


class MediaBrowserMetadata(generic.GenericMetadata):
    """
    Metadata generation class for Media Browser 2.x/3.x - Standard Mode.

    The following file structure is used:

    show_root/series.xml                       (show metadata)
    show_root/folder.jpg                       (poster)
    show_root/backdrop.jpg                     (fanart)
    show_root/Season ##/folder.jpg             (season thumb)
    show_root/Season ##/filename.ext           (*)
    show_root/Season ##/metadata/filename.xml  (episode metadata)
    show_root/Season ##/metadata/filename.jpg  (episode thumb)
    """

    def __init__(self,
                 show_metadata=False,
                 episode_metadata=False,
                 fanart=False,
                 poster=False,
                 banner=False,
                 episode_thumbnails=False,
                 season_posters=False,
                 season_banners=False,
                 season_all_poster=False,
                 season_all_banner=False):

        generic.GenericMetadata.__init__(self,
                                         show_metadata,
                                         episode_metadata,
                                         fanart,
                                         poster,
                                         banner,
                                         episode_thumbnails,
                                         season_posters,
                                         season_banners,
                                         season_all_poster,
                                         season_all_banner)

        self.name = 'MediaBrowser'

        self._ep_nfo_extension = 'xml'
        self._show_metadata_filename = 'series.xml'

        self.fanart_name = "backdrop.jpg"
        self.poster_name = "folder.jpg"

        # web-ui metadata template
        self.eg_show_metadata = "series.xml"
        self.eg_episode_metadata = "Season##\\metadata\\<i>filename</i>.xml"
        self.eg_fanart = "backdrop.jpg"
        self.eg_poster = "folder.jpg"
        self.eg_banner = "banner.jpg"
        self.eg_episode_thumbnails = "Season##\\metadata\\<i>filename</i>.jpg"
        self.eg_season_posters = "Season##\\folder.jpg"
        self.eg_season_banners = "Season##\\banner.jpg"
        self.eg_season_all_poster = "<i>not supported</i>"
        self.eg_season_all_banner = "<i>not supported</i>"

    # Override with empty methods for unsupported features
    def retrieveShowMetadata(self, folder):
        # while show metadata is generated, it is not supported for our lookup
        return (None, None, None)

    def create_season_all_poster(self, show_obj):
        pass

    def create_season_all_banner(self, show_obj):
        pass

    def get_episode_file_path(self, ep_obj):
        """
        Returns a full show dir/metadata/episode.xml path for MediaBrowser
        episode metadata files

        ep_obj: a TVEpisode object to get the path for
        """

        if ek.ek(os.path.isfile, ep_obj.location):
            xml_file_name = helpers.replaceExtension(ek.ek(os.path.basename, ep_obj.location), self._ep_nfo_extension)
            metadata_dir_name = ek.ek(os.path.join, ek.ek(os.path.dirname, ep_obj.location), 'metadata')
            xml_file_path = ek.ek(os.path.join, metadata_dir_name, xml_file_name)
        else:
            logger.log(u"Episode location doesn't exist: " + str(ep_obj.location), logger.DEBUG)
            return ''

        return xml_file_path

    def get_episode_thumb_path(self, ep_obj):
        """
        Returns a full show dir/metadata/episode.jpg path for MediaBrowser
        episode thumbs.

        ep_obj: a TVEpisode object to get the path from
        """

        if ek.ek(os.path.isfile, ep_obj.location):
            tbn_file_name = helpers.replaceExtension(ek.ek(os.path.basename, ep_obj.location), 'jpg')
            metadata_dir_name = ek.ek(os.path.join, ek.ek(os.path.dirname, ep_obj.location), 'metadata')
            tbn_file_path = ek.ek(os.path.join, metadata_dir_name, tbn_file_name)
        else:
            return None

        return tbn_file_path

    def get_season_poster_path(self, show_obj, season):
        """
        Season thumbs for MediaBrowser go in Show Dir/Season X/folder.jpg

        If no season folder exists, None is returned
        """

        dir_list = [x for x in ek.ek(os.listdir, show_obj.location) if
                    ek.ek(os.path.isdir, ek.ek(os.path.join, show_obj.location, x))]

        season_dir_regex = '^Season\s+(\d+)$'

        season_dir = None

        for cur_dir in dir_list:
            # MediaBrowser 1.x only supports 'Specials'
            # MediaBrowser 2.x looks to only support 'Season 0'
            # MediaBrowser 3.x looks to mimic XBMC/Plex support
            if season == 0 and cur_dir == "Specials":
                season_dir = cur_dir
                break

            match = re.match(season_dir_regex, cur_dir, re.I)
            if not match:
                continue

            cur_season = int(match.group(1))

            if cur_season == season:
                season_dir = cur_dir
                break

        if not season_dir:
            logger.log(u"Unable to find a season dir for season " + str(season), logger.DEBUG)
            return None

        logger.log(u"Using " + str(season_dir) + "/folder.jpg as season dir for season " + str(season), logger.DEBUG)

        return ek.ek(os.path.join, show_obj.location, season_dir, 'folder.jpg')

    def get_season_banner_path(self, show_obj, season):
        """
        Season thumbs for MediaBrowser go in Show Dir/Season X/banner.jpg

        If no season folder exists, None is returned
        """

        dir_list = [x for x in ek.ek(os.listdir, show_obj.location) if
                    ek.ek(os.path.isdir, ek.ek(os.path.join, show_obj.location, x))]

        season_dir_regex = '^Season\s+(\d+)$'

        season_dir = None

        for cur_dir in dir_list:
            # MediaBrowser 1.x only supports 'Specials'
            # MediaBrowser 2.x looks to only support 'Season 0'
            # MediaBrowser 3.x looks to mimic XBMC/Plex support
            if season == 0 and cur_dir == "Specials":
                season_dir = cur_dir
                break

            match = re.match(season_dir_regex, cur_dir, re.I)
            if not match:
                continue

            cur_season = int(match.group(1))

            if cur_season == season:
                season_dir = cur_dir
                break

        if not season_dir:
            logger.log(u"Unable to find a season dir for season " + str(season), logger.DEBUG)
            return None

        logger.log(u"Using " + str(season_dir) + "/banner.jpg as season dir for season " + str(season), logger.DEBUG)

        return ek.ek(os.path.join, show_obj.location, season_dir, 'banner.jpg')

    def _show_data(self, show_obj):
        """
        Creates an elementTree XML structure for a MediaBrowser-style series.xml
        returns the resulting data object.

        show_obj: a TVShow instance to create the NFO for
        """

        indexer_lang = show_obj.lang
        # There's gotta be a better way of doing this but we don't wanna
        # change the language value elsewhere
        lINDEXER_API_PARMS = sickbeard.indexerApi(show_obj.indexer).api_params.copy()

        lINDEXER_API_PARMS['actors'] = True

        if indexer_lang and not indexer_lang == 'en':
            lINDEXER_API_PARMS['language'] = indexer_lang

        if show_obj.dvdorder != 0:
            lINDEXER_API_PARMS['dvdorder'] = True

        t = sickbeard.indexerApi(show_obj.indexer).indexer(**lINDEXER_API_PARMS)

        tv_node = etree.Element("Series")

        try:
            myShow = t[int(show_obj.indexerid)]
        except sickbeard.indexer_shownotfound:
            logger.log(u"Unable to find show with id " + str(show_obj.indexerid) + " on " + sickbeard.indexerApi(
                show_obj.indexer).name + ", skipping it", logger.ERROR)
            raise

        except sickbeard.indexer_error:
            logger.log(
                u"" + sickbeard.indexerApi(show_obj.indexer).name + " is down, can't use its data to make the NFO",
                logger.ERROR)
            raise

        if not myShow:
            logger.log(u'Show %s not found on %s ' % (show_obj.name, sickbeard.indexerApi(show_obj.indexer).name),
                       logger.WARNING)
            return

        # check for title and id
        if getattr(myShow, 'seriesname', None) is None or getattr(myShow, 'id', None) is None:
            logger.log(u"Incomplete info for show with id " + str(show_obj.indexerid) + " on " + sickbeard.indexerApi(
                show_obj.indexer).name + ", skipping it", logger.ERROR)
            return False

        indexerid = etree.SubElement(tv_node, "id")
        if getattr(myShow, 'id', None) is not None:
            indexerid.text = str(myShow['id'])

        indexer = etree.SubElement(tv_node, "indexer")
        if show_obj.indexer != None:
            indexer.text = str(show_obj.indexer)

        SeriesName = etree.SubElement(tv_node, "SeriesName")
        if getattr(myShow, 'seriesname', None) is not None:
            SeriesName.text = myShow['seriesname']

        Status = etree.SubElement(tv_node, "Status")
        if getattr(myShow, 'status', None) is not None:
            Status.text = myShow['status']

        Network = etree.SubElement(tv_node, "Network")
        if getattr(myShow, 'network', None) is not None:
            Network.text = myShow['network']

        Airs_Time = etree.SubElement(tv_node, "Airs_Time")
        if getattr(myShow, 'airs_time', None) is not None:
            Airs_Time.text = myShow['airs_time']

        Airs_DayOfWeek = etree.SubElement(tv_node, "Airs_DayOfWeek")
        if getattr(myShow, 'airs_dayofweek', None) is not None:
            Airs_DayOfWeek.text = myShow['airs_dayofweek']

        FirstAired = etree.SubElement(tv_node, "FirstAired")
        if getattr(myShow, 'firstaired', None) is not None:
            FirstAired.text = myShow['firstaired']

        ContentRating = etree.SubElement(tv_node, "ContentRating")
        MPAARating = etree.SubElement(tv_node, "MPAARating")
        certification = etree.SubElement(tv_node, "certification")
        if getattr(myShow, 'contentrating', None) is not None:
            ContentRating.text = myShow['contentrating']
            MPAARating.text = myShow['contentrating']
            certification.text = myShow['contentrating']

        MetadataType = etree.SubElement(tv_node, "Type")
        MetadataType.text = "Series"

        Overview = etree.SubElement(tv_node, "Overview")
        if getattr(myShow, 'overview', None) is not None:
            Overview.text = myShow['overview']

        PremiereDate = etree.SubElement(tv_node, "PremiereDate")
        if getattr(myShow, 'firstaired', None) is not None:
            PremiereDate.text = myShow['firstaired']

        Rating = etree.SubElement(tv_node, "Rating")
        if getattr(myShow, 'rating', None) is not None:
            Rating.text = myShow['rating']

        ProductionYear = etree.SubElement(tv_node, "ProductionYear")
        if getattr(myShow, 'firstaired', None) is not None:
            try:
                year_text = str(datetime.datetime.strptime(myShow['firstaired'], '%Y-%m-%d').year)
                if year_text:
                    ProductionYear.text = year_text
            except:
                pass

        RunningTime = etree.SubElement(tv_node, "RunningTime")
        Runtime = etree.SubElement(tv_node, "Runtime")
        if getattr(myShow, 'runtime', None) is not None:
            RunningTime.text = myShow['runtime']
            Runtime.text = myShow['runtime']

        IMDB_ID = etree.SubElement(tv_node, "IMDB_ID")
        IMDB = etree.SubElement(tv_node, "IMDB")
        IMDbId = etree.SubElement(tv_node, "IMDbId")
        if getattr(myShow, 'imdb_id', None) is not None:
            IMDB_ID.text = myShow['imdb_id']
            IMDB.text = myShow['imdb_id']
            IMDbId.text = myShow['imdb_id']

        Zap2ItId = etree.SubElement(tv_node, "Zap2ItId")
        if getattr(myShow, 'zap2it_id', None) is not None:
            Zap2ItId.text = myShow['zap2it_id']

        Genres = etree.SubElement(tv_node, "Genres")
        for genre in myShow['genre'].split('|'):
            if genre:
                cur_genre = etree.SubElement(Genres, "Genre")
                cur_genre.text = genre

        Genre = etree.SubElement(tv_node, "Genre")
        if getattr(myShow, 'genre', None) is not None:
            Genre.text = "|".join([x for x in myShow["genre"].split('|') if x])

        Studios = etree.SubElement(tv_node, "Studios")
        Studio = etree.SubElement(Studios, "Studio")
        if getattr(myShow, 'network', None) is not None:
            Studio.text = myShow['network']

        Persons = etree.SubElement(tv_node, "Persons")
        if getattr(myShow, 'actors', None) is not None:
            for actor in myShow['_actors']:
                cur_actor = etree.SubElement(Persons, "Person")
                cur_actor_name = etree.SubElement(cur_actor, "Name")
                cur_actor_name.text = actor['name'].strip()
                cur_actor_type = etree.SubElement(cur_actor, "Type")
                cur_actor_type.text = "Actor"
                cur_actor_role = etree.SubElement(cur_actor, "Role")
                cur_actor_role_text = actor['role']
                if cur_actor_role_text != None:
                    cur_actor_role.text = cur_actor_role_text

        helpers.indentXML(tv_node)

        data = etree.ElementTree(tv_node)

        return data

    def _ep_data(self, ep_obj):
        """
        Creates an elementTree XML structure for a MediaBrowser style episode.xml
        and returns the resulting data object.

        show_obj: a TVShow instance to create the NFO for
        """

        eps_to_write = [ep_obj] + ep_obj.relatedEps

        persons_dict = {}
        persons_dict['Director'] = []
        persons_dict['GuestStar'] = []
        persons_dict['Writer'] = []

        indexer_lang = ep_obj.show.lang

        try:
            lINDEXER_API_PARMS = sickbeard.indexerApi(ep_obj.show.indexer).api_params.copy()

            lINDEXER_API_PARMS['actors'] = True

            if indexer_lang and not indexer_lang == 'en':
                lINDEXER_API_PARMS['language'] = indexer_lang

            if ep_obj.show.dvdorder != 0:
                lINDEXER_API_PARMS['dvdorder'] = True

            t = sickbeard.indexerApi(ep_obj.show.indexer).indexer(**lINDEXER_API_PARMS)

            myShow = t[ep_obj.show.indexerid]
        except sickbeard.indexer_shownotfound as e:
            raise exceptions.ShowNotFoundException(e.message)
        except sickbeard.indexer_error as e:
            logger.log(u"Unable to connect to " + sickbeard.indexerApi(
                ep_obj.show.indexer).name + " while creating meta files - skipping - " + ex(e), logger.ERROR)
            return False

        if not myShow:
            logger.log(u'Show %s not found on %s ' % (ep_obj.show.name, sickbeard.indexerApi(ep_obj.show.indexer).name),
                       logger.WARNING)
            return

        rootNode = etree.Element("Item")

        # write an MediaBrowser XML containing info for all matching episodes
        for curEpToWrite in eps_to_write:

            try:
                myEp = myShow[curEpToWrite.season][curEpToWrite.episode]
            except (StandardError, Exception):
                logger.log(u"Unable to find episode " + str(curEpToWrite.season) + "x" + str(
                    curEpToWrite.episode) + " on " + sickbeard.indexerApi(
                    ep_obj.show.indexer).name + ".. has it been removed? Should I delete from db?")
                return None

            if curEpToWrite == ep_obj:
                # root (or single) episode

                # default to today's date for specials if firstaired is not set
                if getattr(myEp, 'firstaired', None) is None and ep_obj.season == 0:
                    myEp['firstaired'] = str(datetime.date.fromordinal(1))

                if getattr(myEp, 'episodename', None) is None or getattr(myEp, 'firstaired', None) is None:
                    return None

                episode = rootNode

                EpisodeName = etree.SubElement(episode, "EpisodeName")
                if curEpToWrite.name != None:
                    EpisodeName.text = curEpToWrite.name
                else:
                    EpisodeName.text = ""

                EpisodeNumber = etree.SubElement(episode, "EpisodeNumber")
                EpisodeNumber.text = str(ep_obj.episode)

                if ep_obj.relatedEps:
                    EpisodeNumberEnd = etree.SubElement(episode, "EpisodeNumberEnd")
                    EpisodeNumberEnd.text = str(curEpToWrite.episode)

                SeasonNumber = etree.SubElement(episode, "SeasonNumber")
                SeasonNumber.text = str(curEpToWrite.season)

                if not ep_obj.relatedEps:
                    absolute_number = etree.SubElement(episode, "absolute_number")
                    if getattr(myEp, 'absolute_number', None) is not None:
                        absolute_number.text = myEp['absolute_number']

                FirstAired = etree.SubElement(episode, "FirstAired")
                if curEpToWrite.airdate != datetime.date.fromordinal(1):
                    FirstAired.text = str(curEpToWrite.airdate)
                else:
                    FirstAired.text = ""

                MetadataType = etree.SubElement(episode, "Type")
                MetadataType.text = "Episode"

                Overview = etree.SubElement(episode, "Overview")
                if curEpToWrite.description != None:
                    Overview.text = curEpToWrite.description
                else:
                    Overview.text = ""

                if not ep_obj.relatedEps:
                    Rating = etree.SubElement(episode, "Rating")
                    if getattr(myEp, 'rating', None) is not None:
                        Rating.text = myEp['rating']

                    IMDB_ID = etree.SubElement(episode, "IMDB_ID")
                    IMDB = etree.SubElement(episode, "IMDB")
                    IMDbId = etree.SubElement(episode, "IMDbId")
                    if getattr(myShow, 'imdb_id', None) is not None:
                        IMDB_ID.text = myShow['imdb_id']
                        IMDB.text = myShow['imdb_id']
                        IMDbId.text = myShow['imdb_id']

                indexerid = etree.SubElement(episode, "id")
                indexerid.text = str(curEpToWrite.indexerid)

                indexer = etree.SubElement(episode, "indexer")
                indexer.text = str(curEpToWrite.show.indexer)

                Persons = etree.SubElement(episode, "Persons")

                Language = etree.SubElement(episode, "Language")
                try:
                    Language.text = curEpToWrite.show.lang
                except:
                    Language.text = 'en'  # tvrage api doesn't provide language so we must assume a value here

                thumb = etree.SubElement(episode, "filename")
                # TODO: See what this is needed for.. if its still needed
                # just write this to the NFO regardless of whether it actually exists or not
                # note: renaming files after nfo generation will break this, tough luck
                thumb_text = self.get_episode_thumb_path(ep_obj)
                if thumb_text:
                    thumb.text = thumb_text

            else:
                # append data from (if any) related episodes
                EpisodeNumberEnd.text = str(curEpToWrite.episode)

                if curEpToWrite.name:
                    if not EpisodeName.text:
                        EpisodeName.text = curEpToWrite.name
                    else:
                        EpisodeName.text = EpisodeName.text + ", " + curEpToWrite.name

                if curEpToWrite.description:
                    if not Overview.text:
                        Overview.text = curEpToWrite.description
                    else:
                        Overview.text = Overview.text + "\r" + curEpToWrite.description

            # collect all directors, guest stars and writers
            if getattr(myEp, 'director', None) is not None:
                persons_dict['Director'] += [x.strip() for x in myEp['director'].split('|') if x]
            if getattr(myEp, 'gueststars', None) is not None:
                persons_dict['GuestStar'] += [x.strip() for x in myEp['gueststars'].split('|') if x]
            if getattr(myEp, 'writer', None) is not None:
                persons_dict['Writer'] += [x.strip() for x in myEp['writer'].split('|') if x]

        # fill in Persons section with collected directors, guest starts and writers
        for person_type, names in iteritems(persons_dict):
            # remove doubles
            names = list(set(names))
            for cur_name in names:
                Person = etree.SubElement(Persons, "Person")
                cur_person_name = etree.SubElement(Person, "Name")
                cur_person_name.text = cur_name
                cur_person_type = etree.SubElement(Person, "Type")
                cur_person_type.text = person_type

        helpers.indentXML(rootNode)
        data = etree.ElementTree(rootNode)

        return data


# present a standard "interface" from the module
metadata_class = MediaBrowserMetadata