import json
import re
from collections import defaultdict
from datetime import date
from calibre.web.feeds.news import BasicNewsRecipe, classes


def absurl(url):
    if url.startswith('/'):
        url = 'https://www.thehindu.com' + url
    return url


local_edition = 'th_hyderabad'
# Chennai is default edition, for other editions use 'th_hyderabad', 'th_bangalore', 'th_delhi', 'th_kolkata' etc


class TheHindu(BasicNewsRecipe):
    title = 'The Hindu'
    __author__ = 'unkn0wn'
    language = 'en_IN'
    no_stylesheets = True
    masthead_url = 'https://www.thehindu.com/theme/images/th-online/thehindu-logo.svg'
    remove_attributes = ['style', 'height', 'width']
    extra_css = '.caption{font-size:small; text-align:center;}'\
        '.author{font-size:small;}'\
        '.subhead{font-weight:bold;}'

    ignore_duplicate_articles = {'url'}

    keep_only_tags = [
        classes('article-section ')
    ]

    remove_tags = [
        classes('hide-mobile comments-shares share-page editiondetails')
    ]

    def preprocess_html(self, soup):
        for cap in soup.findAll('p', attrs={'class':'caption'}):
            cap.name = 'span'
        for img in soup.findAll('img', attrs={'data-original':True}):
            img['src'] = img['data-original']
        return soup

    def populate_article_metadata(self, article, soup, first):
        if first and hasattr(self, 'add_toc_thumbnail'):
            image = soup.find('img')
            if image is not None:
                self.add_toc_thumbnail(article, image['src'])

    def parse_index(self):
        if local_edition:
            yr = str(date.today().year)
            mn = date.today().strftime('%m')
            dy = date.today().strftime('%d')
            url = 'https://www.thehindu.com/todays-paper/' + yr + '-' + mn + '-' + dy + '/' + local_edition + '/'
        else:
            url = 'https://www.thehindu.com/todays-paper/'
        raw = self.index_to_soup(url, raw=True)
        soup = self.index_to_soup(raw)
        ans = self.hindu_parse_index(soup)
        cover = soup.find(attrs={'class':'hindu-ad'})
        if cover:
            self.cover_url = cover.img['src']
        if not ans:
            raise ValueError(
                    'The Hindu Newspaper is not published Today.'
                )
        return ans

    def hindu_parse_index(self, soup):
        for script in soup.findAll('script'):
            if not self.tag_to_string(script).strip().startswith('let grouped_articles = {}'):
                continue
            if script is not None:
                art = re.search(r'grouped_articles = ({\"[^<]+?]})', self.tag_to_string(script))
                data = json.loads(art.group(1))

                feeds_dict = defaultdict(list)

                a = json.dumps(data)
                for sec in json.loads(a):
                    for item in data[sec]:
                        section = sec.replace('TH_', '')
                        title = item['articleheadline']
                        url = absurl(item['href'])
                        desc = 'from page no.' + item['pageno'] + ' | ' + item['teaser_text'] or ''
                        self.log('\t', title, '\n\t\t', url)
                        feeds_dict[section].append({"title": title, "url": url, "description": desc})
                return [(section, articles) for section, articles in feeds_dict.items()]
            else:
                return []