# -*- coding: utf-8 -*-

# Copyright 2023 FanFicFare team
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

from __future__ import absolute_import
import logging
logger = logging.getLogger(__name__)
import re
import json

from ..six import text_type as unicode
from ..htmlcleanup import stripHTML
from .. import exceptions as exceptions

from .base_adapter import BaseSiteAdapter, makeDate

LOGOUT_STR='href="/users/logout'

class BaseOTWAdapter(BaseSiteAdapter):

    def __init__(self, config, url):
        BaseSiteAdapter.__init__(self, config, url)

        self.username = "NoneGiven" # if left empty, site doesn't return any message at all.
        self.password = ""
        self.is_adult=False
        self.addurl = ""

        self.full_work_soup = None
        self.full_work_chapters = None
        self.use_full_work_soup = True

        # get storyId from url--url validation guarantees query is only sid=1234
        self.story.setMetadata('storyId',self.parsedUrl.path.split('/',)[2])

        # get storyId from url--url validation guarantees query correct
        m = re.match(self.getSiteURLPattern(),url)
        if m:
            if m.group('id'):
                self.story.setMetadata('storyId',m.group('id'))
                # normalized story URL.
                self._setURL('https://' + self.getSiteDomain() + '/works/'+self.story.getMetadata('storyId'))
            elif m.group('chapid'):
                # TEMP URL, will be changed after looking up work id.
                # normalized story URL.
                logger.debug("Setting TEMP chapter URL as story URL")
                self._setURL('https://' + self.getSiteDomain() + '/chapters/'+self.story.getMetadata('storyId'))
            else:
                raise exceptions.InvalidStoryURL(url,
                                                 self.getSiteDomain(),
                                                 self.getSiteExampleURLs())
        else:
            raise exceptions.InvalidStoryURL(url,
                                             self.getSiteDomain(),
                                             self.getSiteExampleURLs())

        # Each adapter needs to have a unique site abbreviation.
        self.story.setMetadata('siteabbrev','ao3')

        # The date format will vary from site to site.
        # http://docs.python.org/library/datetime.html#strftime-strptime-behavior
        self.dateformat = "%Y-%b-%d"

    @classmethod
    def getConfigSections(cls):
        "Only needs to be overriden if has additional ini sections."
        return ['base_otw',cls.getConfigSection()]

    @classmethod
    def getSiteExampleURLs(cls):
        return "https://"+cls.getSiteDomain()+"/works/123456 https://"+cls.getSiteDomain()+"/collections/Some_Archive/works/123456 https://"+cls.getSiteDomain()+"/works/123456/chapters/78901"

    def getSiteURLPattern(self):
        # https://archiveofourown.org/collections/Smallville_Slash_Archive/works/159770
        # Discard leading zeros from story ID numbers--AO3 doesn't use them in it's own chapter URLs.
        # logger.debug(r"https?://" + r"|".join([x.replace('.','\.') for x in self.getAcceptDomains()]) + r"(/collections/[^/]+)?/works/0*(?P<id>\d+)")
        return r"https?://(" + r"|".join([x.replace('.',r'\.') for x in self.getAcceptDomains()]) + r")(/collections/[^/]+)?(/works/0*(?P<id>\d+))?(/chapters/0*(?P<chapid>\d+))?"

    @classmethod
    def get_section_url(cls,url):
        ## minimal URL used for section names in INI and reject list
        ## for comparison
        # logger.debug("pre--url:%s"%url)
        ## https://archiveofourown.org/works/19334905/chapters/71697933
        # http://archiveofourown.org/works/34686793/chapters/89043733
        url = re.sub(r'^https?://(.*/works/\d+).*$',r'https://\1',url)
        # logger.debug("post-url:%s"%url)
        return url

    ## Login
    def needToLoginCheck(self, data):
        if 'This work is only available to registered users of the Archive.' in data \
                or "The password or user name you entered doesn't match our records" in data \
            or "have permission to access the page you were trying to reach. Please log in." in data \
            or '<h4 class="heading">With an AO3 account, you can:</h4>' in data:
            return True
        else:
            return False

    def performLogin(self, url, data):

        if self.getConfig("use_archive_transformativeworks_org"):
            logger.warning("Not doing OTW(AO3) login -- doesn't work with use_archive_transformativeworks_org")
            return False
        if self.getConfig("open_pages_in_browser") and self.getConfig("use_browser_cache") and self.getConfig("use_browser_cache_only"):
            logger.warning("Not doing OTW(AO3) login -- doesn't work with open_pages_in_browser")
            return False

        params = {}
        if self.password:
            params['user[login]'] = self.username
            params['user[password]'] = self.password
        else:
            params['user[login]'] = self.getConfig("username")
            params['user[password]'] = self.getConfig("password")
        params['user[remember_me]'] = '1'
        params['commit'] = 'Log in'
        params['utf8'] = u'\x2713' # utf8 *is* required now.  hex code works better than actual character for some reason. u'✓'

        # authenticity_token now comes from a completely separate json call.
        token_json = json.loads(self.get_request('https://' + self.getSiteDomain() + "/token_dispenser.json"))
        params['authenticity_token'] = token_json['token']

        loginUrl = 'https://' + self.getSiteDomain() + '/users/login'
        logger.info("Will now login to URL (%s) as (%s)" % (loginUrl,
                                                            params['user[login]']))

        d = self.post_request(loginUrl, params)

        if LOGOUT_STR not in d :
            logger.info("Failed to login to URL %s as %s" % (loginUrl,
                                                             params['user[login]']))
            raise exceptions.FailedToLogin(url,params['user[login]'])
            return False
        else:
            return True

    ## Getting the chapter list and the meta data, plus 'is adult' checking.
    def extractChapterUrlsAndMetadata(self):

        if self.is_adult or self.getConfig("is_adult"):
            self.addurl = "?view_adult=true"
        else:
            self.addurl=""

        if '/chapters/' in self.url:
            churl = self.url+self.addurl
            logger.debug("Converting TEMP chapters URL to storyUrl")
            data = self.get_request(churl)
            if self.needToLoginCheck(data) or \
                    ( self.getConfig("always_login") and LOGOUT_STR not in data ):
                self.performLogin(churl,data)
                data = self.get_request(churl,usecache=False)
            # logger.debug(data)

            chsoup = self.make_soup(data)
            ## single chapter works don't have entire work link, find
            ## from download links (other links may not be present).
            ## Not just searching for href containing /downloads/ on
            ## the off chance an author includes it.
            ##
            ## <li class="download" aria-haspopup="true">
            ## <a href="#">Download</a>
            ## <ul class="expandable secondary">
            ## <li><a href="/downloads/951/Mothers%20and%20Sons.azw3?updated_at=1695162655">AZW3</a></li>
            entireworka = chsoup.select_one('li.download ul li a')
            m = re.match(r'/downloads/(?P<id>\d+)', entireworka['href'])
            if m and m.group('id'):
                self.story.setMetadata('storyId',m.group('id'))
                # normalized story URL.
                self._setURL('https://' + self.getSiteDomain() + '/works/'+self.story.getMetadata('storyId'))
                logger.debug("Set REAL story URL to (%s)"%self.url)
            else:
                raise exceptions.InvalidStoryURL(self.url,
                                                 self.getSiteDomain(),
                                                 self.getSiteExampleURLs())

        metaurl = self.url+self.addurl
        url = self.url+'/navigate'+self.addurl
        logger.info("url: "+url)
        logger.info("metaurl: "+metaurl)

        data = self.get_request(url)
        if '<h2 class="heading">Error 503 - Service unavailable</h2>' in data:
            # note that it's not *actually* a 503 code...
            raise exceptions.FailedToDownload('Site is currently unavailable.')

        if 'This site is in beta. Things may break or crash without notice.' in data:
            raise exceptions.FailedToDownload('Page failed to load, reported "This site is in beta".')

        meta = self.get_request(metaurl)

        if 'This work is part of an ongoing challenge and will be revealed soon!' in meta:
            raise exceptions.FailedToDownload('Site says: "This work is part of an ongoing challenge and will be revealed soon!"')

        if '<p class="caution">' in meta:
            logger.debug('<p class="caution"> found.  If download fails, check for changed "is adult" string')
        #              This work could have adult content. If you continue, you have agreed that you are willing to see such content.
        #              This work could have adult content. If you proceed you have agreed that you are willing to see such content.
        if re.search(r"This work could have adult content. If you (continue,|proceed) you have agreed that you are willing to see such content.", meta):
            if self.addurl:
                ## "?view_adult=true" doesn't work on base story
                ## URL anymore, which means we have to
                metasoup = self.make_soup(meta)
                a = metasoup.find('a',string='Proceed')
                metaurl = 'https://'+self.host+a['href']
                meta = self.get_request(metaurl)
            else:
                raise exceptions.AdultCheckRequired(self.url)

        if "Sorry, we couldn&#x27;t find the work you were looking for." in data:
            raise exceptions.StoryDoesNotExist(self.url)

        # need to log in for this one, or always_login.
        # logger.debug(data)
        if self.needToLoginCheck(data) or \
                ( self.getConfig("always_login") and LOGOUT_STR not in data ):
            self.performLogin(url,data)
            data = self.get_request(url,usecache=False)
            meta = self.get_request(metaurl,usecache=False)

        ## duplicate of check above for login-required stories that
        ## are also hidden.
        if 'This work is part of an ongoing challenge and will be revealed soon!' in meta:
            raise exceptions.FailedToDownload('Site says: "This work is part of an ongoing challenge and will be revealed soon!"')

        if '<div class="flash error">Sorry, you don&#39;t have permission to access the page you were trying to reach.</div>' in data:
            # note that it's not *actually* a 503 code...
            raise exceptions.FailedToDownload('Site says: "Sorry, you don\'t have permission to access the page you were trying to reach."')

        soup = self.make_soup(data)
        for tag in soup.find_all('div',id='admin-banner'):
            tag.extract()
        metasoup = self.make_soup(meta)
        for tag in metasoup.find_all('div',id='admin-banner'):
            tag.extract()


        ## Title
        a = soup.find('a', href=re.compile(r"/works/\d+$"))
        self.story.setMetadata('title',stripHTML(a))

        if self.getConfig("always_login") and LOGOUT_STR in data: # check actually is logged.
            # deliberately using always_login instead of checking for
            # actual login so we don't have a case where these show up
            # for a user only when they get user-restricted stories.

            # is bookmarked if has update /bookmarks/ form --
            # create bookmark form uses different url
            self.story.setMetadata('bookmarked',
                                   None != metasoup.find('form',action=re.compile(r'^/bookmarks/')))
            if metasoup.find('input',id='bookmark_tag_string').has_attr('value'):
                self.story.extendList('bookmarktags',
                                      metasoup.find('input',id='bookmark_tag_string')['value'].split(', '))
            self.story.setMetadata('bookmarkprivate',
                                   metasoup.find('input',id='bookmark_private').has_attr('checked'))
            self.story.setMetadata('bookmarkrec',
                                   metasoup.find('input',id='bookmark_rec').has_attr('checked'))

            # detect subscription by unsub button
            # logger.debug(metasoup.find('input',value="Unsubscribe"))
            self.story.setMetadata('subscribed',
                                   metasoup.find('input',value="Unsubscribe") is not None)
            # detect 'marked for later' by 'Mark as Read' button
            # logger.debug(metasoup.find('a', href=re.compile(r'/mark_as_read$')))
            self.story.setMetadata('markedforlater',
                                   metasoup.find('form', action=re.compile(r'/mark_as_read$')) is not None)

            self.story.setMetadata('bookmarksummary',
                                   stripHTML(metasoup.find('textarea',id='bookmark_notes')))

        if metasoup.find('img',alt='(Restricted)'):
            self.story.setMetadata('restricted','Restricted')

        # Find authorid and URL from... author url.
        alist = soup.find_all('a', href=re.compile(r"/users/\w+/pseuds/.+"))
        if len(alist) < 1: # ao3 allows for author 'Anonymous' with no author link.
            self.story.setMetadata('author','Anonymous')
            self.story.setMetadata('authorUrl','https://' + self.getSiteDomain() + '/')
            self.story.setMetadata('authorId','0')
        else:
            for a in alist:
                self.story.addToList('authorId',a['href'].split('/')[-1])
                self.story.addToList('authorUrl','https://'+self.host+a['href'])
                self.story.addToList('author',a.text)

        byline = metasoup.find('h3',{'class':'byline'})
        if byline:
            self.story.setMetadata('byline',stripHTML(byline))

        # byline:
        # <h3 class="byline heading">
        # Hope Roy [archived by <a href="/users/ssa_archivist/pseuds/ssa_archivist" rel="author">ssa_archivist</a>]
        # </h3>
        # stripped:"Hope Roy [archived by ssa_archivist]"
        m = re.match(r'(?P<author>.*) \[archived by ?(?P<archivist>.*)\]',stripHTML(byline))
        if( m and
            len(alist) == 1 and
            self.getConfig('use_archived_author') ):
            self.story.setMetadata('author',m.group('author'))

        newestChapter = None
        self.newestChapterNum = None # save for comparing during update.
        # Scan all chapters to find the oldest and newest, on AO3 it's
        # possible for authors to insert new chapters out-of-order or
        # change the dates of earlier ones by editing them--That WILL
        # break epub update.
        # Find the chapters:
        chapters=soup.find_all('a', href=re.compile(r'/works/'+self.story.getMetadata('storyId')+r"/chapters/\d+$"))
        self.story.setMetadata('numChapters',len(chapters))
        logger.debug("numChapters: (%s)"%self.story.getMetadata('numChapters'))
        if len(chapters)==1:
            self.add_chapter(self.story.getMetadata('title'),'https://'+self.host+chapters[0]['href'])
        else:
            for index, chapter in enumerate(chapters):
                # strip just in case there's tags, like <i> in chapter titles.
                # (2013-09-21)
                date = stripHTML(chapter.findNext('span',class_='datetime'))[1:-1]
                chapterDate = makeDate(date,self.dateformat)
                self.add_chapter(chapter,'https://'+self.host+chapter['href'],
                                 {'date':chapterDate.strftime(self.getConfig("datechapter_format",self.getConfig("datePublished_format","%Y-%m-%d")))})
                if newestChapter == None or chapterDate > newestChapter:
                    newestChapter = chapterDate
                    self.newestChapterNum = index

        a = metasoup.find('blockquote',{'class':'userstuff'})
        if a != None:
            a.name='div' # Change blockquote to div.
            self.setDescription(url,a)
            #self.story.setMetadata('description',a.text)

        a = metasoup.find('dd',{'class':"rating tags"})
        if a != None:
            self.story.setMetadata('rating',stripHTML(a.text))

        d = metasoup.find('dd',{'class':"language"})
        if d != None:
            self.story.setMetadata('language',stripHTML(d.text))

        a = metasoup.find('dd',{'class':"fandom tags"})
        if a != None:
            fandoms = a.find_all('a',{'class':"tag"})
            for fandom in fandoms:
                self.story.addToList('fandoms',fandom.string)

        a = metasoup.find('dd',{'class':"warning tags"})
        if a != None:
            warnings = a.find_all('a',{'class':"tag"})
            for warning in warnings:
                self.story.addToList('warnings',warning.string)

        a = metasoup.find('dd',{'class':"freeform tags"})
        if a != None:
            genres = a.find_all('a',{'class':"tag"})
            for genre in genres:
                self.story.addToList('freeformtags',genre.string)

        a = metasoup.find('dd',{'class':"category tags"})
        if a != None:
            genres = a.find_all('a',{'class':"tag"})
            for genre in genres:
                if genre != "Gen":
                    self.story.addToList('ao3categories',genre.string)

        a = metasoup.find('dd',{'class':"character tags"})
        if a != None:
            chars = a.find_all('a',{'class':"tag"})
            for char in chars:
                self.story.addToList('characters',char.string)

        a = metasoup.find('dd',{'class':"relationship tags"})
        if a != None:
            ships = a.find_all('a',{'class':"tag"})
            for ship in ships:
                self.story.addToList('ships',ship.string)

        a = metasoup.find('dd',{'class':"collections"})
        if a != None:
            collections = a.find_all('a')
            for collection in collections:
                self.story.addToList('collections',collection.string)
                self.story.addToList('collectionsUrl','https://'+self.host+collection['href'])

        stats = metasoup.find('dl',{'class':'stats'})
        dt = stats.find_all('dt')
        dd = stats.find_all('dd')
        for x in range(0,len(dt)):
            label = dt[x].text
            value = dd[x].text

            if 'Words:' in label:
                self.story.setMetadata('numWords', value)

            if 'Comments:' in label:
                self.story.setMetadata('comments', value)

            if 'Kudos:' in label:
                self.story.setMetadata('kudos', value)

            if 'Hits:' in label:
                self.story.setMetadata('hits', value)

            if 'Bookmarks:' in label:
                self.story.setMetadata('bookmarks', value)

            if 'Chapters:' in label:
                self.story.setMetadata('chapterslashtotal', value)
                if value.split('/')[0] == value.split('/')[1]:
                    self.story.setMetadata('status', 'Completed')
                else:
                    self.story.setMetadata('status', 'In-Progress')


            if 'Published' in label:
                self.story.setMetadata('datePublished', makeDate(stripHTML(value), self.dateformat))
                self.story.setMetadata('dateUpdated', makeDate(stripHTML(value), self.dateformat))

            if 'Updated' in label:
                self.story.setMetadata('dateUpdated', makeDate(stripHTML(value), self.dateformat))

            if 'Completed' in label:
                self.story.setMetadata('dateUpdated', makeDate(stripHTML(value), self.dateformat))


        # Find Series name from series URL.
        ddseries = metasoup.find('dd',{'class':"series"})

        if ddseries:
            for i, a in enumerate(ddseries.find_all('a', href=re.compile(r"/series/\d+"))):
                series_name = stripHTML(a)
                series_url = 'https://'+self.host+a['href']
                series_index = int(stripHTML(a.previousSibling).replace(', ','').split(' ')[1]) # "Part # of" or ", Part #"
                self.story.setMetadata('series%02d'%i,"%s [%s]"%(series_name,series_index))
                self.story.setMetadata('series%02dUrl'%i,series_url)
                if i == 0:
                    self.setSeries(series_name, series_index)
                    self.story.setMetadata('seriesUrl',series_url)

        if self.getConfig('use_workskin',False):
            divmain = metasoup.find('div',{'id':'main'})
            if divmain:
                # we sort of assume ddmain exists because otherwise, there would be no fic
                workskin = divmain.style
                if workskin:
                    workskin = unicode(workskin.contents[0])  # 'contents' returns a list with (here) a single element
                    # some transformation to adjust which classes are affected
                    workskin = workskin.replace('#workskin', '.userstuff')
                    self.story.extra_css = "/*start of AO3 workskin*/\n" + workskin + "\n/* end of AO3 workskin*/\n"

    def hookForUpdates(self,chaptercount):
        if self.newestChapterNum and self.oldchapters and len(self.oldchapters) > self.newestChapterNum:
            logger.info("Existing epub has %s chapters\nNewest chapter is %s.  Discarding old chapters from there on."%(len(self.oldchapters), self.newestChapterNum+1))
            self.oldchapters = self.oldchapters[:self.newestChapterNum]
        return len(self.oldchapters)

    ## Normalize chapter URLs because a) site has changed from http to
    ## https and b) in case of title change.  That way updates to
    ## existing stories don't re-download all chapters.
    def normalize_chapterurl(self,url):
        url = re.sub(r"https?://("+self.getSiteDomain()+r"/works/\d+/chapters/\d+)(\?view_adult=true)?$",
                     r"https://\1",url)
        return url

    # grab the text for an individual chapter.
    def getChapterTextNum(self, url, index):
        ## FYI: Chapter urls used to include ?view_adult=true in each
        ## one.  With cookiejar being passed now, that's not
        ## necessary.  However, there is a corner case with plugin--If
        ## a user-required story is attempted after gathering metadata
        ## for one that needs adult, but not user AND the user doesn't
        ## enter a valid user, the is_adult cookie from before can be
        ## lost.
        logger.debug('Getting chapter text for: %s index: %s' % (url,index))

        save_chapter_soup = self.make_soup('<div class="story"></div>')
        ## use the div because the full soup will also have <html><body>.
        ## need save_chapter_soup for .new_tag()
        save_chapter=save_chapter_soup.find('div')

        whole_dl_soup = chapter_dl_soup = None

        if self.use_full_work_soup and self.getConfig("use_view_full_work",True) and self.getConfig("always_reload_first_chapter"):
            self.use_full_work_soup = False
            logger.warning("OVERRIDE: AO3 - use_view_full_work not used when always_reload_first_chapter:true")

        if self.use_full_work_soup and self.getConfig("use_view_full_work",True) and self.num_chapters() > 1:
            logger.debug("USE view_full_work")
            ## Assumed view_adult=true was cookied during metadata
            if not self.full_work_soup:
                self.full_work_soup = self.make_soup(self.get_request(self.url+"?view_full_work=true"+self.addurl.replace('?','&')))
                ## AO3 has had several cases now where chapter numbers
                ## are missing, breaking the link between
                ## <div id=chapter-##> and Chapter ##.
                ## But they should all still be there and in the right
                ## order, so array[index]
                self.full_work_chapters = self.full_work_soup.find_all('div',{'id':re.compile(r'chapter-\d+')})
                if len(self.full_work_chapters) != self.num_chapters():
                    ## sanity check just in case.
                    self.use_full_work_soup = False
                    self.full_work_soup = None
                    logger.warning("chapter count in view_full_work(%s) disagrees with num of chapters(%s)--ending use_view_full_work"%(len(self.full_work_chapters),self.num_chapters()))
            whole_dl_soup = self.full_work_soup

        if whole_dl_soup:
            chapter_dl_soup = self.full_work_chapters[index]
        else:
            whole_dl_soup = chapter_dl_soup = self.make_soup(self.get_request(url+self.addurl))
            if None == chapter_dl_soup:
                raise exceptions.FailedToDownload("Error downloading Chapter: %s!  Missing required element!" % url)

        exclude_notes=self.getConfigList('exclude_notes')

        def append_tag(elem,tag,string=None,classes=None):
            '''bs4 requires tags be added separately.'''
            new_tag = save_chapter_soup.new_tag(tag)
            if string:
                new_tag.string=string
            if classes:
                new_tag['class']=[classes]
            elem.append(new_tag)
            return new_tag

        ## These are the over-all work's 'Notes at the beginning'.
        ## They only appear on the first chapter in individual chapter
        ## pages and before chapter-1 div.  Appending removes
        ## headnotes from whole_dl_soup, so be sure to only do it on
        ## the first chapter.
        head_notes_div = append_tag(save_chapter,'div',classes="fff_chapter_notes fff_head_notes")
        if 'authorheadnotes' not in exclude_notes and index == 0:
            headnotes = whole_dl_soup.find('div', {'class' : "preface group"}).find('div', {'class' : "notes module"})
            if headnotes != None:
                ## Also include ul class='associations'.
                ulassoc = headnotes.find('ul', {'class' : "associations"})
                headnotes = headnotes.find('blockquote', {'class' : "userstuff"})
                if headnotes != None or ulassoc != None:
                    append_tag(head_notes_div,'b',"Author's Note:")
                if ulassoc != None:
                    # fix relative links--all examples so far have been.
                    for alink in ulassoc.find_all('a'):
                        if 'http' not in alink['href']:
                            alink['href']='https://' + self.getSiteDomain() + alink['href']
                    head_notes_div.append(ulassoc)
                if headnotes != None:
                    head_notes_div.append(headnotes)

        ## Can appear on every chapter
        if 'chaptersummary' not in exclude_notes:
            chapsumm = chapter_dl_soup.find('div', {'id' : "summary"})
            if chapsumm != None:
                chapsumm = chapsumm.find('blockquote')
                append_tag(head_notes_div,'b',"Summary for the Chapter:")
                head_notes_div.append(chapsumm)

        ## Can appear on every chapter
        if 'chapterheadnotes' not in exclude_notes:
            chapnotes = chapter_dl_soup.find('div', {'id' : "notes"})
            if chapnotes != None:
                chapnotes = chapnotes.find('blockquote')
                if chapnotes != None:
                    append_tag(head_notes_div,'b',"Notes for the Chapter:")
                    head_notes_div.append(chapnotes)

        text = chapter_dl_soup.find('div', {'class' : "userstuff module"})
        chtext = text.find('h3', {'class' : "landmark heading"})
        if chtext:
            chtext.extract()
        save_chapter.append(text)

        foot_notes_div = append_tag(save_chapter,'div',classes="fff_chapter_notes fff_foot_notes")
        ## Can appear on every chapter
        if 'chapterfootnotes' not in exclude_notes:
            chapfoot = chapter_dl_soup.find('div', {'class' : "end notes module"})
            if chapfoot != None:
                chapfoot = chapfoot.find('blockquote')
                append_tag(foot_notes_div,'b',"Notes for the Chapter:")
                foot_notes_div.append(chapfoot)

        skip_on_update_tags = []
        ## These are the over-all work's 'Notes at the end'.
        ## They only appear on the last chapter in individual chapter
        ## pages and after chapter-# div.  Appending removes
        ## headnotes from whole_dl_soup, so be sure to only do it on
        ## the last chapter.
        if 'authorfootnotes' not in exclude_notes and index+1 == self.num_chapters():
            footnotes = whole_dl_soup.find('div', {'id' : "work_endnotes"})
            if footnotes != None:
                footnotes = footnotes.find('blockquote')
                if footnotes:
                    b = append_tag(foot_notes_div,'b',"Author's Note:")
                    skip_on_update_tags.append(b)
                    skip_on_update_tags.append(footnotes)
                    foot_notes_div.append(footnotes)

        ## It looks like 'Inspired by' links now all appear in the ul
        ## class=associations tag in authorheadnotes.  This code is
        ## left in case I'm wrong and there are still stories with div
        ## id=children inspired links at the end.
        if 'inspiredlinks' not in exclude_notes and index+1 == self.num_chapters():
            inspiredlinks = whole_dl_soup.find('div', {'id' : "children"})
            if inspiredlinks != None:
                if inspiredlinks:
                    inspiredlinks.find('h3').name='b' # don't want a big h3 at the end.
                    # fix relative links--all examples so far have been.
                    for alink in inspiredlinks.find_all('a'):
                        if 'http' not in alink['href']:
                            alink['href']='https://' + self.getSiteDomain() + alink['href']
                    skip_on_update_tags.append(inspiredlinks)
                    foot_notes_div.append(inspiredlinks)

        ## remove empty head/food notes div(s)
        if not head_notes_div.find(True):
            head_notes_div.extract()
        if not foot_notes_div.find(True):
            foot_notes_div.extract()
        ## AO3 story end notes end up in the 'last' chapter, but if
        ## updated, then there's a new 'last' chapter.  This option
        ## applies the 'skip_on_ffdl_update' class to those tags which
        ## means they will be removed during epub reading for update.
        ## Results: only the last chapter will have end notes.
        ## Side-effect: An 'Update Always' that doesn't add a new
        ## lasts chapter will remove the end notes.
        if self.getConfig("remove_authorfootnotes_on_update"):
            for skip_tag in skip_on_update_tags:
                if skip_tag.has_attr('class'):
                    skip_tag['class'].append('skip_on_ffdl_update')
                else:
                    skip_tag['class']=['skip_on_ffdl_update']
                # logger.debug(skip_tag)

        return self.utf8FromSoup(url,save_chapter)

    def before_get_urls_from_page(self,url,normalize):
        # special stuff to log into archiveofourown.org, if possible.
        # Unlike most that show the links to 'adult' stories, but protect
        # them, AO3 doesn't even show them if not logged in.  Only works
        # with saved user/pass--not going to prompt for list.
        if self.getConfig("username"):
            if self.getConfig("is_adult"):
                if '?' in url:
                    addurl = "&view_adult=true"
                else:
                    addurl = "?view_adult=true"
            else:
                addurl=""
            # just to get an authenticity_token.
            data = self.get_request(url+addurl)
            # login the session.
            self.performLogin(url,data)
            # get the list page with logged in session.

    def get_series_from_page(self,url,data,normalize=False):
        '''
        This method is to make it easier for adapters to detect a
        series URL, pick out the series metadata and list of storyUrls
        to return without needing to override get_urls_from_page
        entirely.
        '''

        if 'This work is only available to registered users of the Archive' in data:
            raise exceptions.FailedToDownload("This work is only available to registered users of the Archive -- set username/password in personal.ini under [%s]"%self.getSiteDomain())
        ## easiest way to get all the weird URL possibilities and stay
        ## up to date with future changes.
        m = re.match(self.getSiteURLPattern().replace('/works/','/series/'),url)
        if m and m.group('id'): # only series, not tags, collections, etc.
            seriesid = m.group('id')
            soup = self.make_soup(data)
            retval = {}
            urllist = []
            ## series pages can do '...' and not have a link for all
            ## pages.  Also, the page for the given URL, eg
            ## /series/99999?page=3, will *not* be in the list.
            pageparam = '?page='
            pageas = soup.select("ol.pagination li a")
            if pageas:
                pageurls = [ a['href'] for a in pageas ]
                if pageparam in url:
                    pageurls.append(url)
                # logger.debug(pageurls)
                ## need to find largest page number, including url,
                ## but excluding any further params
                maxpagenum = max([ int(re.sub(r'^.*'+re.escape(pageparam)+r'(\d+).*$','\\1',x)) for x in pageurls ])
                # logger.debug(maxpagenum)
                for j in range(1,maxpagenum+1):
                    pageurl = 'https://' + self.getSiteDomain() + '/series/' + seriesid + pageparam + unicode(j)
                    # logger.debug(pageurl)
                    pagesoup = self.make_soup(self.get_request(pageurl))
                    urllist.extend([ 'https://'+self.host+a['href'] for a in pagesoup.select('h4.heading a:first-child') ])
            # logger.debug(urllist)
            if urllist:
                retval['urllist']=urllist
            else:
                retval['urllist']=[ 'https://'+self.host+a['href'] for a in soup.select('h4.heading a:first-child') ]
            retval['name']=stripHTML(soup.select_one("h2.heading"))
            desc=soup.select_one("div.wrapper dd blockquote.userstuff")
            if desc:
                desc.name='div' # change blockquote to div to match stories.
                retval['desc']=desc
            stats=stripHTML(soup.select_one("dl.series dl.stats"))
            if 'Complete:Yes' in stats:
                retval['status'] = "Completed"
            elif 'Complete:No' in stats:
                retval['status'] = "In-Progress"
            return retval
        ## return dict with at least {'urllist':['storyUrl','storyUrl',...]}
        ## optionally 'name' and 'desc'?
        return {}
