#!/usr/bin/env  python

__license__   = 'GPL v3'
__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
'''
economist.com
'''
from calibre.web.feeds.news import BasicNewsRecipe
from calibre.ebooks.BeautifulSoup import Tag, NavigableString
from collections import OrderedDict

import re

class Economist(BasicNewsRecipe):

    title = 'The Economist'
    language = 'en'

    __author__ = "Kovid Goyal"
    INDEX = 'http://www.economist.com/printedition'
    description = ('Global news and current affairs from a European'
            ' perspective. Best downloaded on Friday mornings (GMT)')
    extra_css      = '.headline {font-size: x-large;} \n h2 { font-size: small;  } \n h1 { font-size: medium;  }'
    oldest_article = 7.0
    cover_url = 'http://media.economist.com/sites/default/files/imagecache/print-cover-thumbnail/print-covers/currentcoverus_large.jpg'
    #cover_url = 'http://www.economist.com/images/covers/currentcoverus_large.jpg'
    remove_tags = [
            dict(name=['script', 'noscript', 'title', 'iframe', 'cf_floatingcontent']),
            dict(attrs={'class':['dblClkTrk', 'ec-article-info',
                'share_inline_header', 'related-items']}),
            {'class': lambda x: x and 'share-links-header' in x},
    ]
    keep_only_tags = [dict(id='ec-article-body')]
    no_stylesheets = True
    preprocess_regexps = [(re.compile('</html>.*', re.DOTALL),
        lambda x:'</html>')]

    # economist.com has started throttling after about 60% of the total has
    # downloaded with connection reset by peer (104) errors.
    delay = 1

    needs_subscription = False
    '''
    def get_browser(self):
        br = BasicNewsRecipe.get_browser()
        if self.username and self.password:
            br.open('http://www.economist.com/user/login')
            br.select_form(nr=1)
            br['name'] = self.username
            br['pass'] = self.password
            res = br.submit()
            raw = res.read()
            if '>Log out<' not in raw:
                raise ValueError('Failed to login to economist.com. '
                        'Check your username and password.')
        return br
    '''

    def parse_index(self):
        return self.economist_parse_index()

    def economist_parse_index(self):
        soup = self.index_to_soup(self.INDEX)
        div = soup.find('div', attrs={'class':'issue-image'})
        if div is not None:
            img = div.find('img', src=True)
            if img is not None:
                self.cover_url = img['src']
        feeds = OrderedDict()
        for section in soup.findAll(attrs={'class':lambda x: x and 'section' in
            x}):
            h4 = section.find('h4')
            if h4 is None:
                continue
            section_title = self.tag_to_string(h4).strip()
            if not section_title:
                continue
            self.log('Found section: %s'%section_title)
            articles = []
            subsection = ''
            for node in section.findAll(attrs={'class':'article'}):
                subsec = node.findPreviousSibling('h5')
                if subsec is not None:
                    subsection = self.tag_to_string(subsec)
                prefix = (subsection+': ') if subsection else ''
                a = node.find('a', href=True)
                if a is not None:
                    url = a['href']
                    if url.startswith('/'): url = 'http://www.economist.com'+url
                    url += '/print'
                    title = self.tag_to_string(a)
                    if title:
                        title = prefix + title
                        self.log('\tFound article:', title)
                        articles.append({'title':title, 'url':url,
                        'description':'', 'date':''})

            if articles:
                if section_title not in feeds:
                    feeds[section_title] = []
                feeds[section_title] += articles

        ans = [(key, val) for key, val in feeds.iteritems()]
        if not ans:
            raise Exception('Could not find any articles, either the '
                    'economist.com server is having trouble and you should '
                    'try later or the website format has changed and the '
                    'recipe needs to be updated.')
        return ans

    def eco_find_image_tables(self, soup):
        for x in soup.findAll('table', align=['right', 'center']):
            if len(x.findAll('font')) in (1,2) and len(x.findAll('img')) == 1:
                yield x

    def postprocess_html(self, soup, first):
        body = soup.find('body')
        for name, val in body.attrs:
            del body[name]

        for table in list(self.eco_find_image_tables(soup)):
            caption = table.find('font')
            img = table.find('img')
            div = Tag(soup, 'div')
            div['style'] = 'text-align:left;font-size:70%'
            ns = NavigableString(self.tag_to_string(caption))
            div.insert(0, ns)
            div.insert(1, Tag(soup, 'br'))
            del img['width']
            del img['height']
            img.extract()
            div.insert(2, img)
            table.replaceWith(div)
        return soup
