import re
from collections import defaultdict

from calibre.web.feeds.news import BasicNewsRecipe, classes


class StrangeHorizons(BasicNewsRecipe):
    title = 'Strange Horizons'
    description = 'A magazine of speculative fiction and related nonfiction. Best downloaded on weekends'
    __author__ = 'unkn0wn'
    no_stylesheets = True
    use_embedded_content = False
    encoding = 'utf-8'
    language = 'en'
    remove_attributes = ['style', 'height', 'width']
    masthead_url = 'http://strangehorizons.com/wordpress/wp-content/themes/strangehorizons/images/sh-logo.jpg'

    extra_css = '''
        .author-biographies, .content-warning-container-ltr, .category {font-size:small; font-style:italic; font-color:#404040;}
        .byline {font-size:small; font-color:#202020;}
        .title {font-size:large; text-align:center;}
    '''

    ignore_duplicate_articles = {'url'}

    keep_only_tags = [
        classes('post-container')
    ]

    remove_tags = [
        dict(name = 'button'),
        classes('font-size sharedaddy comments-form-row')
    ]

    def parse_index(self):
        main = self.index_to_soup('http://strangehorizons.com/issue/')
        issue = main.find(attrs={'class':lambda x: x and 'current-issue-widget' in x.split()})
        current = issue.find('a', href=lambda x: x and x.startswith('http://strangehorizons.com/issue/'))
        date = issue.find(**classes('date'))
        self.timefmt = ' [' + self.tag_to_string(date) + ']'
        self.log('Downloading Issue:', self.timefmt, current['href'])
        soup = self.index_to_soup(current['href'])

        feeds_dict = defaultdict(list)

        for art in soup.findAll('div', attrs={'class':'article'}):
            for ti in art.findAll(**classes('title')):
                if a := ti.find('a', href=True):
                    url = a['href']
                    title = self.tag_to_string(ti).strip()

                sec = 'Articles'
                if cat := art.find(**classes('category')):
                    sec = self.tag_to_string(cat).strip()

                desc = ''
                if exp := ti.find_next_sibling(**classes('excerpt')):
                    desc = self.tag_to_string(exp) + desc
                    desc = re.sub(r"\d{5} ", "", desc)
                if auth := ti.find_next_sibling(**classes('author')):
                    desc = self.tag_to_string(auth) + ' | ' + desc

                if not title or not url:
                    continue

            self.log(sec, '\n\t', title, '\n\t', desc, '\n\t\t', url)
            feeds_dict[sec].append({"title": title, "url": url, "description": desc})
        return [(section, articles) for section, articles in feeds_dict.items()]
