#!/usr/bin/env python
# vim:fileencoding=utf-8
# License: GPLv3 Copyright: 2019, Kovid Goyal <kovid at kovidgoyal.net>
from calibre.web.feeds.news import BasicNewsRecipe


def classes(classes):
    q = frozenset(classes.split(' '))
    return dict(attrs={
        'class': lambda x: x and frozenset(x.split()).intersection(q)})


def absolutize(href):
    if href.startswith('/'):
        href =  'https://www.lrb.co.uk' + href
    return href


class LondonReviewOfBooksPayed(BasicNewsRecipe):
    title = 'London Review of Books'
    __author__ = 'Kovid Goyal'
    description = 'Literary review publishing essay-length book reviews and topical articles on politics, literature, history, philosophy, science and the arts by leading writers and thinkers'  # noqa
    category = 'news, literature, UK'
    publisher = 'LRB Ltd.'
    language = 'en_GB'
    no_stylesheets = True
    delay = 1
    encoding = 'utf-8'
    INDEX = 'https://www.lrb.co.uk/the-paper/'
    publication_type = 'magazine'
    needs_subscription = 'optional'
    requires_version = (3, 0, 0)
    masthead_url = 'https://www.mylrb.co.uk/out/lrb-2014/img/logo-2x.png'
    extra_css = '''
        .article-word-count, #article-tag-holder { font-size:small; color:#202020; }
        .embedded-image-caption { font-size:small; text-align:center; }
        blockquote, em { color:#202020; }
    '''
    resolve_internal_links = True

    keep_only_tags = [
        dict(attrs={'id':['article-tag-holder', 'article-heading-holder']}),
        classes('article-copy article-word-count'),
    ]

    remove_attributes = ['style', 'width', 'height']

    def get_browser(self):
        br = BasicNewsRecipe.get_browser(self)
        if self.username and self.password:
            br.open('https://www.lrb.co.uk/login')
            br.select_form(id='login_form')
            br['_username'] = self.username
            br['_password'] = self.password
            raw = br.submit().read()
            if b'>My Account<' not in raw:
                raise ValueError('Failed to login check username and password')
        return br

    def preprocess_html(self, soup):
        for h2 in soup.findAll('h2'):
            h2.name = 'h4'
        for cap in soup.findAll(**classes('embedded-image-caption')):
            for p in cap.findAll('p'):
                p.name = 'div'
        for img in soup.findAll('img', attrs={'data-srcset': True}):
            img['src'] = 'https://www.lrb.co.uk/storage/400_filter/images/' + img['data-appsrc'].split('/images/')[-1]
        return soup

    recipe_specific_options = {
        'issue_url': {
            'short': 'The issue URL ',
            'long': 'For example, https://www.lrb.co.uk/the-paper/v46/n01',
            'default': 'https://www.lrb.co.uk/the-paper/'
        }
    }

    def parse_index(self):
        d = self.recipe_specific_options.get('issue_url')
        if d and isinstance(d, str):
            self.INDEX = d
        soup = self.index_to_soup(self.INDEX)
        container = soup.find('div', attrs={'class': 'article-issue-cover-image'})
        if container:
            self.cover_url = 'https://www.lrb.co.uk/storage/800_filter/images/' + container.img['data-appsrc'].split('/images/')[-1]
        edition = self.tag_to_string(soup.find('h1', attrs={'class': 'toc-title'}))
        self.timefmt = ' [{}]'.format(edition)
        self.log('Downloading: ', edition)
        grid = soup.find(attrs={'class': 'toc-grid-items'})
        articles = []
        for a in grid.findAll(**classes('toc-item')):
            url = absolutize(a['href'])
            h3 = a.find('h3')
            h4 = a.find('h4')
            title = '{}: {}'.format(self.tag_to_string(h3), self.tag_to_string(h4))
            self.log(title, url)
            articles.append({'title': title, 'url': url})
        return [('Articles', articles)]
