#!/usr/bin/env python
# vim:fileencoding=utf-8
# License: GPLv3 Copyright: 2015, Kovid Goyal <kovid at kovidgoyal.net>
import json
from xml.sax.saxutils import escape, quoteattr

from calibre.utils.iso8601 import parse_iso8601
from calibre.web.feeds.news import BasicNewsRecipe, classes
from calibre.web.feeds.news import prefixed_classes as prefix_classes

web_version = True
test_article = None
# test_article = 'https://www.theatlantic.com/health/archive/2020/12/covid-19-second-surge/617415/?utm_source=feed'


# parse article JSON {{{
def process_image_block(lines, block):
    caption = block.get('captionText')
    caption_lines = []
    if caption:
        if block.get('attributionText', '').strip():
            caption += ' (' + block['attributionText'] + ')'
        caption_lines.append('<p style="font-style: italic">' + caption + '</p>')
    lines.append('<div style="text-align: center"><img src={}/>'.format(quoteattr(block['url'])))
    lines.extend(caption_lines)
    lines.append('</div>')


def json_to_html(raw):
    data = json.loads(raw)
    # open('/t/p.json', 'w').write(json.dumps(data, indent=2))
    data = max((v['data'] for v in data['props']['pageProps']['urqlState'].values()), key=len)
    article = json.loads(data)['article']
    # open('/t/p.json', 'w').write(json.dumps(article, indent=2))
    lines = []
    lines.append('<h1 style="align: center">' + escape(article['title']) + '</h1>')
    lines.append('<h2 style="align: center">' + escape(article['dek']) + '</h2>')
    auts = ', '.join(x['displayName'] for x in article['authors'])
    if auts:
        lines.append('<p style="align: center">by ' + escape(auts) + '</p>')
    dp = article['datePublished']
    dt = parse_iso8601(dp)
    lines.append('<p style="align: center">' + escape(dt.strftime('%a, %d %b %Y')) + '</p>')
    if article.get('leadArt') and 'image' in article['leadArt']:
        process_image_block(lines, article['leadArt']['image'])
    for item in article['content']:
        tn = item.get('__typename', '')
        if tn.endswith('Image'):
            process_image_block(lines, item)
            continue
        html = item.get('innerHtml')
        if html is None or '</iframe>' in html:
            continue
        if 'innerHtml' not in item:
            continue
        tagname = item.get('tagName', 'P').lower()
        lines.append('<{0}>{1}</{0}>'.format(tagname, html))
    return '<html><body><div id="from-json-by-calibre">' + '\n'.join(lines) + '</div></body></html>'


class NoJSON(ValueError):
    pass


def extract_html(soup):
    script = soup.findAll('script', id='__NEXT_DATA__')
    if not script:
        raise NoJSON('No script tag with JSON data found')
    raw = script[0].contents[0]
    return json_to_html(raw)


# }}}


class TheAtlantic(BasicNewsRecipe):
    if web_version:
        title = 'TheAtlantic.com'
        description = 'News and editorial about politics, culture, entertainment, tech, etc. Contains many articles not seen in The Atlantic magazine'
    else:
        title = 'The Atlantic'
        description = 'Current affairs and politics focussed on the US'
        INDEX = 'https://www.theatlantic.com/magazine/'

    __author__ = 'Kovid Goyal'
    language = 'en'
    encoding = 'utf-8'

    compress_news_images = True
    scale_news_images_to_device = True

    keep_only_tags = [
        dict(itemprop=['headline']),
        classes(
            'c-article-header__hed c-rubric article-header c-article-meta c-lead-media'
            ' lead-img article-cover-extra article-body article-magazine article-cover-content'
        ),
        prefix_classes('ArticleHeader_root__ ArticleLayoutSection_main__ ArticleHero_timestamp__ ArticleBody_root__'),
        dict(itemprop='articleBody'),
        # these are for photos articles
        dict(id=['article-header', 'from-json-by-calibre']),
        classes('photos'),
    ]
    remove_tags = [
        classes(
            'c-ad c-share-social c-recirculation-link social-kit-top letter-writer-info callout secondary-byline embed-wrapper'
            ' offset-wrapper boxtop-most-popular social-icons hints read-more c-article-writer__social'
        ),
        prefix_classes('ArticleRecirc_inline__'),
        {'name': ['meta', 'link', 'noscript', 'aside', 'h3']},
        {'attrs': {'class': ['offset-wrapper', 'boxtop-most-popular']}},
        {'attrs': {'class': lambda x: x and 'article-tools' in x}},
        {'src': lambda x: x and 'spotxchange.com' in x},
    ]
    remove_tags_after = classes('article-body')

    no_stylesheets = True
    remove_attributes = ['style']
    extra_css = '''
        .credit { text-align: right; font-size: 75%; display: block }
        .figcaption { font-size: 75% }
        .caption { font-size: 75% }
        .lead-img { display: block }
        p.dropcap:first-letter {
        float: left; text-transform: uppercase; font-weight: bold; font-size: 5.55em; line-height: 0.83;
        margin: 0; padding-right: 7px; margin-bottom: -2px; text-align: center;
        }
    '''

    def get_browser(self):
        br = BasicNewsRecipe.get_browser(self)
        br.set_cookie('inEuropeanUnion', '0', '.theatlantic.com')
        return br

    def preprocess_raw_html(self, raw_html, url):
        try:
            return extract_html(self.index_to_soup(raw_html))
        except NoJSON:
            self.log.warn('No JSON found in: {} falling back to HTML'.format(url))
        except Exception:
            self.log.exception('Failed to extract JSON data from: {} falling back to HTML'.format(url))
        return raw_html

    def preprocess_html(self, soup):
        for img in soup.findAll('img', attrs={'data-srcset': True}):
            # img['src'] = img['data-srcset'].split()[0]
            data_srcset = img['data-srcset']
            if ',' in data_srcset:
                img['src'] = data_srcset.split(',')[0]
            else:
                img['src'] = data_srcset.split()[0]
        for img in soup.findAll('img', attrs={'data-src': True}):
            img['src'] = img['data-src']
        return soup

    def print_version(self, url):
        ans = url.partition('?')[0] + '?single_page=true'
        if '/video/' in ans:
            ans = None
        return ans

    if web_version and not test_article:
        use_embedded_content = False

        feeds = [
            ('The Atlantic', 'https://www.theatlantic.com/feed/all/'),
            ('Best of The Atlantic', 'https://www.theatlantic.com/feed/best-of/'),
            ('Politics | The Atlantic', 'https://www.theatlantic.com/feed/channel/politics/'),
            ('Business | The Atlantic', 'https://www.theatlantic.com/feed/channel/business/'),
            ('Culture | The Atlantic', 'https://www.theatlantic.com/feed/channel/entertainment/'),
            ('Global | The Atlantic', 'https://www.theatlantic.com/feed/channel/international/'),
            ('Technology | The Atlantic', 'https://www.theatlantic.com/feed/channel/technology/'),
            ('U.S. | The Atlantic', 'https://www.theatlantic.com/feed/channel/national/'),
            ('Health | The Atlantic', 'https://www.theatlantic.com/feed/channel/health/'),
            ('Video | The Atlantic', 'https://www.theatlantic.com/feed/channel/video/'),
            ('Sexes | The Atlantic', 'https://www.theatlantic.com/feed/channel/sexes/'),
            ('Education | The Atlantic', 'https://www.theatlantic.com/feed/channel/education/'),
            ('Science | The Atlantic', 'https://www.theatlantic.com/feed/channel/science/'),
            ('News | The Atlantic', 'https://www.theatlantic.com/feed/channel/news/'),
            ('Press Releases | The Atlantic', 'https://www.theatlantic.com/feed/channel/press-releases/'),
            ('Newsletters | The Atlantic', 'https://www.theatlantic.com/feed/channel/newsletters/'),
            ('The Atlantic Photo', 'https://feeds.feedburner.com/theatlantic/infocus'),
            ('Notes | The Atlantic', 'https://feeds.feedburner.com/TheAtlanticNotes'),
        ]
    else:

        def parse_index(self):
            if test_article:
                return [('Articles', [{'title': 'Test article', 'url': test_article}])]
            soup = self.index_to_soup(self.INDEX)
            img = soup.find(**prefix_classes('IssueDescription_cover__'))
            if img is not None:
                self.cover_url = img['src']
            current_section, current_articles = 'Cover Story', []
            feeds = []
            for x in soup.findAll(**prefix_classes('TocFeaturedSection_heading__ TocSection_heading__ TocHeroGridItem_hedLink___ TocGridItem_hedLink__')):
                cls = x['class']
                if not isinstance(cls, str):
                    cls = ' '.join(cls)
                title = self.tag_to_string(x).strip()
                if 'Section' in cls:
                    if current_articles:
                        feeds.append((current_section, current_articles))
                    current_section, current_articles = title, []
                    self.log(current_section)
                    continue
                url = x['href']
                current_articles.append({'title': title, 'url': url})
                self.log('\t', title, url)
            if current_articles:
                feeds.append((current_section, current_articles))
            return feeds


if __name__ == '__main__':
    import sys

    from calibre.ebooks.BeautifulSoup import BeautifulSoup

    print(extract_html(BeautifulSoup(open(sys.argv[-1]).read())))
