# coding=utf-8
import logging
import re
import datetime
import subliminal
import time

from random import randint
from requests import Session
from subliminal.cache import region
from subliminal.exceptions import DownloadLimitExceeded, AuthenticationError
from subliminal.providers.addic7ed import Addic7edProvider as _Addic7edProvider, \
    Addic7edSubtitle as _Addic7edSubtitle, ParserBeautifulSoup, show_cells_re
from subliminal.subtitle import fix_line_ending
from subliminal_patch.utils import sanitize
from subliminal_patch.exceptions import TooManyRequests
from subliminal_patch.pitcher import pitchers, load_verification, store_verification
from subzero.language import Language

logger = logging.getLogger(__name__)

#: Series header parsing regex
series_year_re = re.compile(r'^(?P<series>[ \w\'.:(),*&!?-]+?)(?: \((?P<year>\d{4})\))?$')

SHOW_EXPIRATION_TIME = datetime.timedelta(weeks=1).total_seconds()


class Addic7edSubtitle(_Addic7edSubtitle):
    hearing_impaired_verifiable = True

    def __init__(self, language, hearing_impaired, page_link, series, season, episode, title, year, version,
                 download_link):
        super(Addic7edSubtitle, self).__init__(language, hearing_impaired, page_link, series, season, episode,
                                               title, year, version, download_link)
        self.release_info = version

    def get_matches(self, video):
        matches = super(Addic7edSubtitle, self).get_matches(video)
        if not subliminal.score.episode_scores.get("addic7ed_boost"):
            return matches

        # if the release group matches, the format is most likely correct, as well
        if "release_group" in matches:
            matches.add("format")

        if {"series", "season", "episode", "year"}.issubset(matches) and "format" in matches:
            matches.add("addic7ed_boost")
            logger.info("Boosting Addic7ed subtitle by %s" % subliminal.score.episode_scores.get("addic7ed_boost"))
        return matches

    def __repr__(self):
        return '<%s %r [%s]>' % (
            self.__class__.__name__, u"http://www.addic7ed.com/%s" % self.download_link, self.language)


class Addic7edProvider(_Addic7edProvider):
    languages = {Language('por', 'BR')} | {Language(l) for l in [
        'ara', 'aze', 'ben', 'bos', 'bul', 'cat', 'ces', 'dan', 'deu', 'ell', 'eng', 'eus', 'fas', 'fin', 'fra', 'glg',
        'heb', 'hrv', 'hun', 'hye', 'ind', 'ita', 'jpn', 'kor', 'mkd', 'msa', 'nld', 'nor', 'pol', 'por', 'ron', 'rus',
        'slk', 'slv', 'spa', 'sqi', 'srp', 'swe', 'tha', 'tur', 'ukr', 'vie', 'zho'
    ]} | {Language.fromietf(l) for l in ["sr-Latn", "sr-Cyrl"]}

    USE_ADDICTED_RANDOM_AGENTS = False
    hearing_impaired_verifiable = True
    subtitle_class = Addic7edSubtitle
    server_url = 'https://www.addic7ed.com/'

    sanitize_characters = {'-', ':', '(', ')', '.', '/'}

    def __init__(self, username=None, password=None, use_random_agents=False):
        super(Addic7edProvider, self).__init__(username=username, password=password)
        self.USE_ADDICTED_RANDOM_AGENTS = use_random_agents

    def initialize(self):
        self.session = Session()
        self.session.headers['User-Agent'] = 'Subliminal/%s' % subliminal.__short_version__

        from .utils import FIRST_THOUSAND_OR_SO_USER_AGENTS as AGENT_LIST
        logger.debug("Addic7ed: using random user agents")
        self.session.headers['User-Agent'] = AGENT_LIST[randint(0, len(AGENT_LIST) - 1)]
        self.session.headers['Referer'] = self.server_url

        # login
        if self.username and self.password:
            def check_verification(cache_region):
                rr = self.session.get(self.server_url + 'panel.php', allow_redirects=False, timeout=10,
                                      headers={"Referer": self.server_url})
                if rr.status_code == 302:
                    logger.info('Addic7ed: Login expired')
                    cache_region.delete("addic7ed_data")
                else:
                    logger.info('Addic7ed: Re-using old login')
                    self.logged_in = True
                    return True

            if load_verification("addic7ed", self.session, callback=check_verification):
                return

            logger.info('Addic7ed: Logging in')
            data = {'username': self.username, 'password': self.password, 'Submit': 'Log in', 'url': '',
                    'remember': 'true'}

            tries = 0
            while tries < 3:
                r = self.session.get(self.server_url + 'login.php', timeout=10, headers={"Referer": self.server_url})
                if "grecaptcha" in r.content:
                    logger.info('Addic7ed: Solving captcha. This might take a couple of minutes, but should only '
                                'happen once every so often')

                    site_key = re.search(r'grecaptcha.execute\(\'(.+?)\',', r.content).group(1)
                    if not site_key:
                        logger.error("Addic7ed: Captcha site-key not found!")
                        return

                    pitcher = pitchers.get_pitcher()("Addic7ed", self.server_url + 'login.php', site_key,
                                                     user_agent=self.session.headers["User-Agent"],
                                                     cookies=self.session.cookies.get_dict(),
                                                     is_invisible=True)

                    result = pitcher.throw()
                    if not result:
                        raise Exception("Addic7ed: Couldn't solve captcha!")

                    data["recaptcha_response"] = result

                r = self.session.post(self.server_url + 'dologin.php', data, allow_redirects=False, timeout=10,
                                      headers={"Referer": self.server_url + "login.php"})

                if "relax, slow down" in r.content:
                    raise TooManyRequests(self.username)

                if r.status_code != 302:
                    if "User <b></b> doesn't exist" in r.content and tries <= 2:
                        logger.info("Addic7ed: Error, trying again. (%s/%s)", tries+1, 3)
                        tries += 1
                        continue

                    raise AuthenticationError(self.username)
                break

            store_verification("addic7ed", self.session)

            logger.debug('Addic7ed: Logged in')
            self.logged_in = True

    def terminate(self):
        self.session.close()

    def get_show_id(self, series, year=None, country_code=None):
        """Get the best matching show id for `series`, `year` and `country_code`.

        First search in the result of :meth:`_get_show_ids` and fallback on a search with :meth:`_search_show_id`.

        :param str series: series of the episode.
        :param year: year of the series, if any.
        :type year: int
        :param country_code: country code of the series, if any.
        :type country_code: str
        :return: the show id, if found.
        :rtype: int

        """
        series_sanitized = sanitize(series).lower()
        show_ids = self._get_show_ids()
        show_id = None

        # attempt with country
        if not show_id and country_code:
            logger.debug('Getting show id with country')
            show_id = show_ids.get('%s %s' % (series_sanitized, country_code.lower()))

        # attempt with year
        if not show_id and year:
            logger.debug('Getting show id with year')
            show_id = show_ids.get('%s %d' % (series_sanitized, year))

        # attempt clean
        if not show_id:
            logger.debug('Getting show id')
            show_id = show_ids.get(series_sanitized)

        # search as last resort
        # broken right now
        # if not show_id:
        #     logger.warning('Series %s not found in show ids', series)
        #     show_id = self._search_show_id(series)

        return show_id

    @region.cache_on_arguments(expiration_time=SHOW_EXPIRATION_TIME)
    def _get_show_ids(self):
        """Get the ``dict`` of show ids per series by querying the `shows.php` page.
        :return: show id per series, lower case and without quotes.
        :rtype: dict

        # patch: add punctuation cleaning
        """
        # get the show page
        logger.info('Getting show ids')
        r = self.session.get(self.server_url + 'shows.php', timeout=10)
        r.raise_for_status()

        # LXML parser seems to fail when parsing Addic7ed.com HTML markup.
        # Last known version to work properly is 3.6.4 (next version, 3.7.0, fails)
        # Assuming the site's markup is bad, and stripping it down to only contain what's needed.
        show_cells = re.findall(show_cells_re, r.content)
        if show_cells:
            soup = ParserBeautifulSoup(b''.join(show_cells), ['lxml', 'html.parser'])
        else:
            # If RegEx fails, fall back to original r.content and use 'html.parser'
            soup = ParserBeautifulSoup(r.content, ['html.parser'])

        # populate the show ids
        show_ids = {}
        for show in soup.select('td > h3 > a[href^="/show/"]'):
            show_clean = sanitize(show.text, default_characters=self.sanitize_characters)
            try:
                show_id = int(show['href'][6:])
            except ValueError:
                continue

            show_ids[show_clean] = show_id
            match = series_year_re.match(show_clean)
            if match and match.group(2) and match.group(1) not in show_ids:
                # year found, also add it without year
                show_ids[match.group(1)] = show_id

        soup.decompose()
        soup = None

        logger.debug('Found %d show ids', len(show_ids))

        return show_ids

    @region.cache_on_arguments(expiration_time=SHOW_EXPIRATION_TIME)
    def _search_show_id(self, series, year=None):
        """Search the show id from the `series` and `year`.

        :param str series: series of the episode.
        :param year: year of the series, if any.
        :type year: int
        :return: the show id, if found.
        :rtype: int

        """
        # addic7ed doesn't support search with quotes
        series = series.replace('\'', ' ')

        # build the params
        series_year = '%s %d' % (series, year) if year is not None else series
        params = {'search': series_year, 'Submit': 'Search'}

        # make the search
        logger.info('Searching show ids with %r', params)

        # currently addic7ed searches via srch.php from the front page, then a re-search is needed which calls
        # search.php
        for endpoint in ("srch.php", "search.php",):
            headers = None
            if endpoint == "search.php":
                headers = {
                    "referer": self.server_url + "srch.php"
                }
            r = self.session.get(self.server_url + endpoint, params=params, timeout=10, headers=headers)
            r.raise_for_status()

            if r.content and "Sorry, your search" not in r.content:
                break

            time.sleep(4)

        if r.status_code == 304:
            raise TooManyRequests()

        soup = ParserBeautifulSoup(r.content, ['lxml', 'html.parser'])

        suggestion = None

        # get the suggestion
        try:
            suggestion = soup.select('span.titulo > a[href^="/show/"]')
            if not suggestion:
                logger.warning('Show id not found: no suggestion')
                return None
            if not sanitize(suggestion[0].i.text.replace('\'', ' '),
                            default_characters=self.sanitize_characters) == \
                    sanitize(series_year, default_characters=self.sanitize_characters):
                logger.warning('Show id not found: suggestion does not match')
                return None
            show_id = int(suggestion[0]['href'][6:])
            logger.debug('Found show id %d', show_id)

            return show_id
        finally:
            soup.decompose()
            soup = None

    def query(self, show_id, series, season, year=None, country=None):
        # patch: fix logging

        # get the page of the season of the show
        logger.info('Getting the page of show id %d, season %d', show_id, season)
        r = self.session.get(self.server_url + 'ajax_loadShow.php',
                             params={'show': show_id, 'season': season},
                             timeout=10,
                             headers={
                                 "referer": "%sshow/%s" % (self.server_url, show_id),
                                 "X-Requested-With": "XMLHttpRequest"
                             }
                             )

        r.raise_for_status()

        if r.status_code == 304:
            raise TooManyRequests()

        if not r.content:
            # Provider wrongful return a status of 304 Not Modified with an empty content
            # raise_for_status won't raise exception for that status code
            logger.error('No data returned from provider')
            return []

        soup = ParserBeautifulSoup(r.content, ['lxml', 'html.parser'])

        # loop over subtitle rows
        subtitles = []
        for row in soup.select('tr.epeven'):
            cells = row('td')

            # ignore incomplete subtitles
            status = cells[5].text
            if status != 'Completed':
                logger.debug('Ignoring subtitle with status %s', status)
                continue

            # read the item
            language = Language.fromaddic7ed(cells[3].text)
            hearing_impaired = bool(cells[6].text)
            page_link = self.server_url + cells[2].a['href'][1:]
            season = int(cells[0].text)
            episode = int(cells[1].text)
            title = cells[2].text
            version = cells[4].text
            download_link = cells[9].a['href'][1:]

            subtitle = self.subtitle_class(language, hearing_impaired, page_link, series, season, episode, title,
                                           year,
                                           version, download_link)
            logger.debug('Found subtitle %r', subtitle)
            subtitles.append(subtitle)

        soup.decompose()
        soup = None

        return subtitles

    def download_subtitle(self, subtitle):
        # download the subtitle
        r = self.session.get(self.server_url + subtitle.download_link, headers={'Referer': subtitle.page_link},
                             timeout=10)
        r.raise_for_status()

        if r.status_code == 304:
            raise TooManyRequests()

        if not r.content:
            # Provider wrongful return a status of 304 Not Modified with an empty content
            # raise_for_status won't raise exception for that status code
            logger.error('Unable to download subtitle. No data returned from provider')
            return

        # detect download limit exceeded
        if r.headers['Content-Type'] == 'text/html':
            raise DownloadLimitExceeded

        subtitle.content = fix_line_ending(r.content)