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

# Copyright(C) 2011-2014 Laurent Bachelier
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.

import re

import requests

from weboob.capabilities.paste import BasePaste, PasteNotFound
from weboob.tools.browser2 import HTMLPage, PagesBrowser, URL


class Spam(Exception):
    def __init__(self):
        super(Spam, self).__init__("Detected as spam and unable to handle the captcha")


class PastealaconPaste(BasePaste):
    # all pastes are public
    public = True

    # TODO perhaps move this logic elsewhere, remove this and id2url from capability
    # (page_url is required by pastoob)
    @property
    def page_url(self):
        return '%s%s' % (PastealaconBrowser.BASEURL, self.id)


class PastePage(HTMLPage):
    # TODO use magic Browser2 methods (if possible)
    def fill_paste(self, paste):
        # there is no 404, try to detect if there really is a content
        if len(self.doc.xpath('id("content")/div[@class="syntax"]//ol')) != 1:
            raise PasteNotFound()

        header = self.doc.xpath('id("content")/h3')[0]
        matches = re.match(r'Posted by (?P<author>.+) on (?P<date>.+) \(', header.text)
        paste.title = matches.groupdict().get('author')
        paste.contents = unicode(self.doc.xpath('//textarea[@id="code"]')[0].text)
        return paste

    def get_id(self):
        return self.params['id']


class CaptchaPage(HTMLPage):
    pass


class PostPage(HTMLPage):
    def post(self, paste, expiration=None):
        form = self.get_form(name='editor')
        form['code2'] = paste.contents
        form['poster'] = paste.title
        if expiration:
            form['expiry'] = expiration
        form.submit()


class PastealaconBrowser(PagesBrowser):
    BASEURL = 'http://pastealacon.com/'

    paste = URL(r'(?P<id>\d+)', PastePage)
    captcha = URL(r'%s' % re.escape('pastebin.php?captcha=1'), CaptchaPage)
    raw = URL(r'%s(?P<id>\d+)' % re.escape('pastebin.php?dl='))
    post = URL(r'$', PostPage)

    @paste.id2url
    def get_paste(self, url):
        url = self.absurl(url, base=True)
        m = self.paste.match(url)
        if m:
            return PastealaconPaste(m.groupdict()['id'])

    def fill_paste(self, paste):
        """
        Get as much as information possible from the paste page
        """
        self.paste.stay_or_go(id=paste.id)
        return self.page.fill_paste(paste)

    def get_contents(self, _id):
        """
        Get the contents from the raw URL
        This is the fastest and safest method if you only want the content.
        Returns unicode.
        """
        try:
            return self.raw.open(id=_id).text
        # TODO maybe have Browser2 raise a specialized exception
        except requests.exceptions.HTTPError as e:
            if e.response.status_code == requests.codes.not_found:
                raise PasteNotFound()
            else:
                raise e

    def post_paste(self, paste, expiration=None):
        self.post.stay_or_go().post(paste, expiration=expiration)
        if self.captcha.is_here():
            raise Spam()
        paste.id = self.page.get_id()