# 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 datetime
import re
import time
import urllib

from xml.dom.minidom import parseString

import sickbeard
import generic

from sickbeard import classes, show_name_helpers, helpers

from sickbeard import exceptions, logger
from sickbeard import tvcache
from sickbeard.exceptions import ex


class NZBsProvider(generic.NZBProvider):
    def __init__(self):

        generic.NZBProvider.__init__(self, "NZBs.org Old")

        self.supportsBacklog = True

        self.cache = NZBsCache(self)

        self.url = 'https://secure.nzbs.org/'

    def isEnabled(self):
        return sickbeard.NZBS

    def _checkAuth(self):
        if sickbeard.NZBS_UID in (None, "") or sickbeard.NZBS_HASH in (None, ""):
            raise exceptions.AuthException("NZBs.org authentication details are empty, check your config")

    def _get_season_search_strings(self, ep_obj):
        return ['^' + x for x in show_name_helpers.makeSceneSeasonSearchString(self.show, ep_obj)]

    def _get_episode_search_strings(self, ep_obj, add_string=''):
        return ['^' + x for x in show_name_helpers.makeSceneSearchString(self.show, ep_obj)]

    def _doSearch(self, curString, show=None, age=None):

        curString = curString.replace('.', ' ')

        params = {"action": "search",
                  "q": curString.encode('utf-8'),
                  "dl": 1,
                  "i": sickbeard.NZBS_UID,
                  "h": sickbeard.NZBS_HASH,
                  "age": sickbeard.USENET_RETENTION,
                  "num": 100,
                  "type": 1}

        searchURL = self.url + "rss.php?" + urllib.urlencode(params)

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

        data = self.getRSSFeed(searchURL)

        # Pause to avoid 503's
        time.sleep(5)

        if data is None:
            logger.log(u"Error trying to load NZBs.org RSS feed: " + searchURL, logger.ERROR)
            return []

        items = data.entries

        results = []

        for curItem in items:
            (title, url) = self._get_title_and_url(curItem)

            if not title or not url:
                logger.log(
                    u"The XML returned from the NZBs.org RSS feed is incomplete, this result is unusable: " + data,
                    logger.ERROR)
                continue

            if "&i=" not in url and "&h=" not in url:
                raise exceptions.AuthException(
                    "The NZBs.org result URL has no auth info which means your UID/hash are incorrect, check your config")

            results.append(curItem)

        return results

    def findPropers(self, date=None):

        results = []

        for curString in (".PROPER.", ".REPACK."):

            for curResult in self._doSearch(curString):

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

                pubDate_node = curResult.getElementsByTagName('pubDate')[0]
                pubDate = helpers.get_xml_text(pubDate_node)

                match = re.search('(\w{3}, \d{1,2} \w{3} \d{4} \d\d:\d\d:\d\d) [\+\-]\d{4}', pubDate)
                if not match:
                    continue

                resultDate = datetime.datetime.strptime(match.group(1), "%a, %d %b %Y %H:%M:%S")

                if date is None or resultDate > date:
                    results.append(classes.Proper(title, url, resultDate))

        return results


class NZBsCache(tvcache.TVCache):
    def __init__(self, provider):
        tvcache.TVCache.__init__(self, provider)

        # only poll NZBs.org every 15 minutes max
        self.minTime = 15

    def _getRSSData(self):
        url = self.provider.url + 'rss.php?'
        urlArgs = {'type': 1,
                   'dl': 1,
                   'num': 100,
                   'i': sickbeard.NZBS_UID,
                   'h': sickbeard.NZBS_HASH,
                   'age': sickbeard.USENET_RETENTION}

        url += urllib.urlencode(urlArgs)

        logger.log(u"NZBs cache update URL: " + url, logger.DEBUG)

        return self.provider.getURL(url)

    def _checkItemAuth(self, title, url):
        if "&i=" not in url and "&h=" not in url:
            raise exceptions.AuthException(
                "The NZBs.org result URL has no auth info which means your UID/hash are incorrect, check your config")


provider = NZBsProvider()