# Author: Nic Wolfe <nic@wolfeden.ca>
# URL: http://code.google.com/p/sickbeard/
#
# This file is part of Sick Beard.
#
# Sick Beard 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.
#
# Sick Beard 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 Sick Beard.  If not, see <http://www.gnu.org/licenses/>.

import urllib
import re
try:
    import xml.etree.cElementTree as etree
except ImportError:
    import elementtree.ElementTree as etree

import sickbeard
import generic

from sickbeard.common import Quality
from sickbeard import logger
from sickbeard import tvcache
from sickbeard import helpers


class EZRSSProvider(generic.TorrentProvider):

    def __init__(self):

        generic.TorrentProvider.__init__(self, "EZRSS")

        self.supportsBacklog = True

        self.cache = EZRSSCache(self)

        self.url = 'https://www.ezrss.it/'

    def isEnabled(self):
        return sickbeard.EZRSS

    def imageName(self):
        return 'ezrss.png'

    def getQuality(self, item):

        filename = helpers.get_xml_text(item.find('{http://xmlns.ezrss.it/0.1/}torrent/{http://xmlns.ezrss.it/0.1/}fileName'))
        quality = Quality.nameQuality(filename)

        return quality

    def findSeasonResults(self, show, season):

        results = {}

        if show.air_by_date:
            logger.log(self.name + u" doesn't support air-by-date backlog because of limitations on their RSS search.", logger.WARNING)
            return results

        results = generic.TorrentProvider.findSeasonResults(self, show, season)

        return results

    def _get_season_search_strings(self, show, season, wantedEp, searchSeason=False):

        params = {}

        if not show:
            return params

        params['show_name'] = helpers.sanitizeSceneName(show.name, ezrss=True).replace('.', ' ').encode('utf-8')

        params['season'] = season

        return [params]

    def _get_episode_search_strings(self, ep_obj):

        params = {}

        if not ep_obj:
            return params

        params['show_name'] = helpers.sanitizeSceneName(ep_obj.show.name, ezrss=True).replace('.', ' ').encode('utf-8')

        if ep_obj.show.air_by_date:
            params['date'] = str(ep_obj.airdate)
        else:
            params['season'] = ep_obj.season
            params['episode'] = ep_obj.episode

        return [params]

    def _doSearch(self, search_params, show=None):

        params = {"mode": "rss"}

        if search_params:
            params.update(search_params)

        search_url = self.url + 'search/index.php?' + urllib.urlencode(params)

        logger.log(u"Search string: " + search_url, logger.DEBUG)

        data = self.getURL(search_url)

        if not data:
            logger.log(u"No data returned from " + search_url, logger.ERROR)
            return []

        parsedXML = helpers.parse_xml(data)

        if parsedXML is None:
            logger.log(u"Error trying to load " + self.name + " RSS feed", logger.ERROR)
            return []

        items = parsedXML.findall('.//item')

        results = []

        for curItem in items:

            (title, url) = self._get_title_and_url(curItem)

            if title and url:
                logger.log(u"Adding item from RSS to results: " + title, logger.DEBUG)
                results.append(curItem)
            else:
                logger.log(u"The XML returned from the " + self.name + " RSS feed is incomplete, this result is unusable", logger.ERROR)

        return results

    def _get_title_and_url(self, item):
        (title, url) = generic.TorrentProvider._get_title_and_url(self, item)

        filename = helpers.get_xml_text(item.find('{http://xmlns.ezrss.it/0.1/}torrent/{http://xmlns.ezrss.it/0.1/}fileName'))

        if filename:
            new_title = self._extract_name_from_filename(filename)
            if new_title:
                title = new_title
                logger.log(u"Extracted the name " + title + " from the torrent link", logger.DEBUG)

        return (title, url)

    def _extract_name_from_filename(self, filename):
        name_regex = '(.*?)\.?(\[.*]|\d+\.TPB)\.torrent$'
        logger.log(u"Comparing " + name_regex + " against " + filename, logger.DEBUG)
        match = re.match(name_regex, filename, re.I)
        if match:
            return match.group(1)
        return None


class EZRSSCache(tvcache.TVCache):

    def __init__(self, provider):

        tvcache.TVCache.__init__(self, provider)

        # only poll EZRSS every 15 minutes max
        self.minTime = 15

    def _getRSSData(self):

        rss_url = self.provider.url + 'feed/'
        logger.log(self.provider.name + " cache update URL: " + rss_url, logger.DEBUG)

        data = self.provider.getURL(rss_url)

        if not data:
            logger.log(u"No data returned from " + rss_url, logger.ERROR)
            return None

        return data

    def _parseItem(self, item):

        (title, url) = self.provider._get_title_and_url(item)

        if title and url:
            logger.log(u"Adding item from RSS to cache: " + title, logger.DEBUG)
            url = self._translateLinkURL(url)
            return self._addCacheEntry(title, url)

        else:
            logger.log(u"The XML returned from the " + self.provider.name + " feed is incomplete, this result is unusable", logger.ERROR)
            return None

provider = EZRSSProvider()