# -*- coding: utf-8 -*-

from __future__ import (unicode_literals, division, absolute_import, print_function)

__license__ = 'GPL 3'
__copyright__ = '2011, John Schember <john@nachtimwald.com>'
__docformat__ = 'restructuredtext en'

import mimetypes
from contextlib import closing

from lxml import etree

from calibre import browser
from calibre.gui2.store.basic_config import BasicStoreConfig
from calibre.gui2.store.opensearch_store import OpenSearchOPDSStore
from calibre.gui2.store.search_result import SearchResult
from calibre.utils.opensearch.description import Description
from calibre.utils.opensearch.query import Query

class ManyBooksStore(BasicStoreConfig, OpenSearchOPDSStore):

    open_search_url = 'http://www.manybooks.net/opds/'
    web_url = 'http://manybooks.net'

    def search(self, query, max_results=10, timeout=60):
        '''
        Manybooks uses a very strange opds feed. The opds
        main feed is structured like a stanza feed. The 
        search result entries give very little information
        and requires you to go to a detail link. The detail
        link has the wrong type specified (text/html instead
        of application/atom+xml).
        '''
        if not hasattr(self, 'open_search_url'):
            return

        description = Description(self.open_search_url)
        url_template = description.get_best_template()
        if not url_template:
            return
        oquery = Query(url_template)

        # set up initial values
        oquery.searchTerms = query
        oquery.count = max_results
        url = oquery.url()
        
        counter = max_results
        br = browser()
        with closing(br.open(url, timeout=timeout)) as f:
            raw_data = f.read()
            raw_data = raw_data.decode('utf-8', 'replace')
            doc = etree.fromstring(raw_data)
            for data in doc.xpath('//*[local-name() = "entry"]'):
                if counter <= 0:
                    break
            
                counter -= 1
    
                s = SearchResult()
                
                detail_links = data.xpath('./*[local-name() = "link" and @type = "text/html"]')
                if not detail_links:
                    continue
                detail_link = detail_links[0]
                detail_href = detail_link.get('href')
                if not detail_href:
                    continue

                s.detail_item = 'http://manybooks.net/titles/' + detail_href.split('tid=')[-1] + '.html'
                # These can have HTML inside of them. We are going to get them again later
                # just in case.
                s.title = ''.join(data.xpath('./*[local-name() = "title"]//text()')).strip()
                s.author = ', '.join(data.xpath('./*[local-name() = "author"]//text()')).strip()
                
                # Follow the detail link to get the rest of the info.
                with closing(br.open(detail_href, timeout=timeout/4)) as df:
                    ddoc = etree.fromstring(df.read())
                    ddata = ddoc.xpath('//*[local-name() = "entry"][1]')
                    if ddata:
                        ddata = ddata[0]

                        # This is the real title and author info we want. We got
                        # it previously just in case it's not specified here for some reason.
                        s.title = ''.join(ddata.xpath('./*[local-name() = "title"]//text()')).strip()
                        s.author = ', '.join(ddata.xpath('./*[local-name() = "author"]//text()')).strip()
                        if s.author.startswith(','):
                            s.author = s.author[1:]
                        if s.author.endswith(','):
                            s.author = s.author[:-1]
                        
                        s.cover_url = ''.join(ddata.xpath('./*[local-name() = "link" and @rel = "http://opds-spec.org/thumbnail"][1]/@href')).strip()
                        
                        for link in ddata.xpath('./*[local-name() = "link" and @rel = "http://opds-spec.org/acquisition"]'):
                            type = link.get('type')
                            href = link.get('href')
                            if type:
                                ext = mimetypes.guess_extension(type)
                                if ext:
                                    ext = ext[1:].upper().strip()
                                    s.downloads[ext] = href

                s.price = '$0.00'
                s.drm = SearchResult.DRM_UNLOCKED
                s.formats = 'EPUB, PDB (eReader, PalmDoc, zTXT, Plucker, iSilo), FB2, ZIP, AZW, MOBI, PRC, LIT, PKG, PDF, TXT, RB, RTF, LRF, TCR, JAR'

                yield s
