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

# Copyright(C) 2010-2011 Romain Bignon
#
# 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/>.

from __future__ import with_statement

import email
import time
import re
import datetime
from html2text import unescape
from dateutil import tz
from dateutil.parser import parse as _parse_dt

from weboob.capabilities.base import NotLoaded
from weboob.capabilities.chat import ICapChat
from weboob.capabilities.messages import ICapMessages, ICapMessagesPost, Message, Thread
from weboob.capabilities.dating import ICapDating, OptimizationNotFound
from weboob.capabilities.contact import ICapContact, ContactPhoto, Query, QueryError
from weboob.capabilities.account import ICapAccount, StatusField
from weboob.tools.backend import BaseBackend, BackendConfig
from weboob.tools.browser import BrowserUnavailable
from weboob.tools.value import Value, ValuesDict, ValueBool, ValueBackendPassword
from weboob.tools.log import getLogger
from weboob.tools.misc import local2utc

from .contact import Contact
from .captcha import CaptchaError
from .antispam import AntiSpam
from .browser import AuMBrowser
from .optim.profiles_walker import ProfilesWalker
from .optim.visibility import Visibility
from .optim.queries_queue import QueriesQueue


__all__ = ['AuMBackend']


def parse_dt(s):
    d = _parse_dt(s)
    return local2utc(d)

class AuMBackend(BaseBackend, ICapMessages, ICapMessagesPost, ICapDating, ICapChat, ICapContact, ICapAccount):
    NAME = 'aum'
    MAINTAINER = 'Romain Bignon'
    EMAIL = 'romain@weboob.org'
    VERSION = '0.9.1'
    LICENSE = 'AGPLv3+'
    DESCRIPTION = u"“Adopte un mec” french dating website"
    CONFIG = BackendConfig(Value('username',                label='Username'),
                           ValueBackendPassword('password', label='Password'),
                           ValueBool('antispam',            label='Enable anti-spam', default=False),
                           ValueBool('baskets',             label='Get baskets with new messages', default=True))
    STORAGE = {'profiles_walker': {'viewed': []},
               'queries_queue': {'queue': []},
               'sluts': {},
              }
    BROWSER = AuMBrowser

    MAGIC_ID_BASKET = 1

    def __init__(self, *args, **kwargs):
        BaseBackend.__init__(self, *args, **kwargs)
        if self.config['antispam'].get():
            self.antispam = AntiSpam()
        else:
            self.antispam = None

    def create_default_browser(self):
        return self.create_browser(self.config['username'].get(), self.config['password'].get())

    def report_spam(self, id):
        with self.browser:
            self.browser.delete_thread(id)
            # Do not report fakes to website, to let them to other guys :)
            #self.browser.report_fake(id)

    # ---- ICapDating methods ---------------------

    def init_optimizations(self):
        self.add_optimization('PROFILE_WALKER', ProfilesWalker(self.weboob.scheduler, self.storage, self.browser))
        self.add_optimization('VISIBILITY', Visibility(self.weboob.scheduler, self.browser))
        self.add_optimization('QUERIES_QUEUE', QueriesQueue(self.weboob.scheduler, self.storage, self.browser))

    # ---- ICapMessages methods ---------------------

    def fill_thread(self, thread, fields):
        return self.get_thread(thread)

    def iter_threads(self):
        with self.browser:
            threads = self.browser.get_threads_list()

        for thread in threads:
            if thread['member'].get('isBan', True):
                with self.browser:
                    self.browser.delete_thread(thread['member']['id'])
                continue
            if self.antispam and not self.antispam.check_thread(thread):
                self.logger.info('Skipped a spam-thread from %s' % thread['pseudo'])
                self.report_spam(thread['member']['id'])
                continue
            t = Thread(int(thread['member']['id']))
            t.flags = Thread.IS_DISCUSSION
            t.title = 'Discussion with %s' % thread['member']['pseudo']
            yield t

    def get_thread(self, id, contacts=None, get_profiles=False):
        """
        Get a thread and its messages.

        The 'contacts' parameters is only used for internal calls.
        """
        thread = None
        if isinstance(id, Thread):
            thread = id
            id = thread.id

        if not thread:
            thread = Thread(int(id))
            thread.flags = Thread.IS_DISCUSSION
            full = False
        else:
            full = True

        with self.browser:
            mails = self.browser.get_thread_mails(id, 100)
            my_name = self.browser.get_my_name()

        child = None
        msg = None
        slut = self._get_slut(id)
        if contacts is None:
            contacts = {}

        if not thread.title:
            thread.title = u'Discussion with %s' % mails['member']['pseudo']

        self.storage.set('sluts', thread.id, 'status', mails['status'])
        self.storage.save()

        for mail in mails['messages']:
            flags = 0
            if self.antispam and not self.antispam.check_mail(mail):
                self.logger.info('Skipped a spam-mail from %s' % mails['member']['pseudo'])
                self.report_spam(thread.id)
                break

            if parse_dt(mail['date']) > slut['lastmsg']:
                flags |= Message.IS_UNREAD

                if get_profiles:
                    if not mail['id_from'] in contacts:
                        with self.browser:
                            contacts[mail['id_from']] = self.get_contact(mail['id_from'])
                    if self.antispam and not self.antispam.check_contact(contacts[mail['id_from']]):
                        self.logger.info('Skipped a spam-mail-profile from %s' % mails['member']['pseudo'])
                        self.report_spam(thread.id)
                        break

            if int(mail['id_from']) == self.browser.my_id:
                if int(mails['remoteStatus']) == 0 and msg is None:
                    flags |= Message.IS_NOT_ACCUSED
                else:
                    flags |= Message.IS_ACCUSED


            msg = Message(thread=thread,
                          id=int(time.strftime('%Y%m%d%H%M%S', parse_dt(mail['date']).timetuple())),
                          title=thread.title,
                          sender=my_name if int(mail['id_from']) == self.browser.my_id else mails['member']['pseudo'],
                          receivers=[my_name if int(mail['id_from']) != self.browser.my_id else mails['member']['pseudo']],
                          date=parse_dt(mail['date']),
                          content=unescape(mail['message']).strip(),
                          signature=contacts[mail['id_from']].get_text() if mail['id_from'] in contacts else None,
                          children=[],
                          flags=flags)
            if child:
                msg.children.append(child)
                child.parent = msg

            child = msg

        if full and msg:
            # If we have get all the messages, replace NotLoaded with None as
            # parent.
            msg.parent = None
        if not full and not msg:
            # Perhaps there are hidden messages
            msg = NotLoaded

        thread.root = msg

        return thread

    def iter_unread_messages(self, thread=None):
        try:
            contacts = {}
            with self.browser:
                threads = self.browser.get_threads_list()
            for thread in threads:
                if thread['member'].get('isBan', True):
                    with self.browser:
                        self.browser.delete_thread(int(thread['member']['id']))
                    continue
                if self.antispam and not self.antispam.check_thread(thread):
                    self.logger.info('Skipped a spam-unread-thread from %s' % thread['member']['pseudo'])
                    self.report_spam(thread['member']['id'])
                    continue
                slut = self._get_slut(thread['member']['id'])
                if parse_dt(thread['date']) > slut['lastmsg'] or int(thread['status']) != int(slut['status']):
                    t = self.get_thread(thread['member']['id'], contacts, get_profiles=True)
                    for m in t.iter_all_messages():
                        if m.flags & m.IS_UNREAD:
                            yield m

            if not self.config['baskets'].get():
                return

            # Send mail when someone added me in her basket.
            # XXX possibly race condition if a slut adds me in her basket
            #     between the aum.nb_new_baskets() and aum.get_baskets().
            with self.browser:
                slut = self._get_slut(-self.MAGIC_ID_BASKET)

                new_baskets = self.browser.nb_new_baskets()
                if new_baskets > 0:
                    baskets = self.browser.get_baskets()
                    my_name = self.browser.get_my_name()
                    for basket in baskets:
                        if basket['isBan'] or parse_dt(basket['date']) <= slut['lastmsg']:
                            continue
                        contact = self.get_contact(basket['id'])
                        if self.antispam and not self.antispam.check_contact(contact):
                            self.logger.info('Skipped a spam-basket from %s' % contact.name)
                            self.report_spam(basket['id'])
                            continue

                        thread = Thread(int(basket['id']))
                        thread.title = 'Basket of %s' % contact.name
                        thread.root = Message(thread=thread,
                                              id=self.MAGIC_ID_BASKET,
                                              title=thread.title,
                                              sender=contact.name,
                                              receivers=[my_name],
                                              date=parse_dt(basket['date']),
                                              content='You are taken in her basket!',
                                              signature=contact.get_text(),
                                              children=[],
                                              flags=Message.IS_UNREAD)
                        yield thread.root
        except BrowserUnavailable, e:
            self.logger.debug('No messages, browser is unavailable: %s' % e)
            pass # don't care about waiting

    def set_message_read(self, message):
        if message.id == self.MAGIC_ID_BASKET:
            # Save the last baskets checks.
            slut = self._get_slut(-self.MAGIC_ID_BASKET)
            if slut['lastmsg'] < message.date:
                slut['lastmsg'] = message.date
                self.storage.set('sluts', -self.MAGIC_ID_BASKET, slut)
                self.storage.save()
            return

        slut = self._get_slut(message.thread.id)
        if slut['lastmsg'] < message.date:
            slut['lastmsg'] = message.date
            self.storage.set('sluts', message.thread.id, slut)
            self.storage.save()

    def _get_slut(self, id):
        id = int(id)
        sluts = self.storage.get('sluts')
        if not sluts or not id in sluts:
            slut = {'lastmsg': datetime.datetime(1970,1,1),
                    'status':  0}
        else:
            slut = self.storage.get('sluts', id)

        slut['lastmsg'] = slut.get('lastmsg', datetime.datetime(1970,1,1)).replace(tzinfo=tz.tzutc())
        slut['status'] = int(slut.get('status', 0))
        return slut

    # ---- ICapMessagesPost methods ---------------------

    def post_message(self, message):
        with self.browser:
            self.browser.post_mail(message.thread.id, message.content)

    # ---- ICapContact methods ---------------------

    def fill_contact(self, contact, fields):
        if 'profile' in fields:
            contact = self.get_contact(contact)
        if contact and 'photos' in fields:
            for name, photo in contact.photos.iteritems():
                with self.browser:
                    if photo.url and not photo.data:
                        data = self.browser.openurl(photo.url).read()
                        contact.set_photo(name, data=data)
                    if photo.thumbnail_url and not photo.thumbnail_data:
                        data = self.browser.openurl(photo.thumbnail_url).read()
                        contact.set_photo(name, thumbnail_data=data)

    def fill_photo(self, photo, fields):
        with self.browser:
            if 'data' in fields and photo.url and not photo.data:
                photo.data = self.browser.readurl(photo.url)
            if 'thumbnail_data' in fields and photo.thumbnail_url and not photo.thumbnail_data:
                photo.thumbnail_data = self.browser.readurl(photo.thumbnail_url)
        return photo

    def get_contact(self, contact):
        with self.browser:
            if isinstance(contact, Contact):
                _id = contact.id
            elif isinstance(contact, (int,long,basestring)):
                _id = contact
            else:
                raise TypeError("The parameter 'contact' isn't a contact nor a int/long/str/unicode: %s" % contact)

            profile = self.browser.get_profile(_id)
            if not profile:
                return None

            _id = profile['id']

            if isinstance(contact, Contact):
                contact.id = _id
                contact.name = profile['pseudo']
            else:
                contact = Contact(_id, profile['pseudo'], Contact.STATUS_ONLINE)
            contact.url = self.browser.id2url(_id)
            contact.parse_profile(profile, self.browser.get_consts())
            return contact

    def iter_contacts(self, status=Contact.STATUS_ALL, ids=None):
        with self.browser:
            threads = self.browser.get_threads_list(count=100)
        for thread in threads:
            contact = thread['member']
            if contact.get('isBan', True):
                with self.browser:
                    self.browser.delete_thread(int(contact['id']))
                continue
            s = 0
            if contact['isOnline']:
                s = Contact.STATUS_ONLINE
            else:
                s = Contact.STATUS_OFFLINE

            if not status & s or (ids and not contact['id'] in ids):
                continue

            c = Contact(contact['id'], contact['pseudo'], s)
            c.url = self.browser.id2url(contact['id'])
            birthday = _parse_dt(contact['birthday'])
            age = int((datetime.datetime.now() - birthday).days / 365.25)
            c.status_msg = u'%s old' % age
            if int(contact['cover']) > 0:
                url = 'http://s%s.adopteunmec.com/%s%%(type)s%s.jpg' % (contact['shard'], contact['path'], contact['cover'])
            else:
                url = 'http://s.adopteunmec.com/www/img/thumb0.gif'

            c.set_photo('image%s' % contact['cover'],
                        url=url % {'type': 'image'},
                        thumbnail_url=url % {'type': 'thumb0_'})
            yield c

    def send_query(self, id):
        if isinstance(id, Contact):
            id = id.id

        queries_queue = None
        try:
            queries_queue = self.get_optimization('QUERIES_QUEUE')
        except OptimizationNotFound:
            pass

        if queries_queue and queries_queue.is_running():
            if queries_queue.enqueue_query(id):
                return Query(id, 'A charm has been sent')
            else:
                return Query(id, 'Unable to send charm: it has been enqueued')
        else:
            with self.browser:
                if not self.browser.send_charm(id):
                    raise QueryError('No enough charms available')
                return Query(id, 'A charm has been sent')

    # ---- ICapChat methods ---------------------

    def iter_chat_messages(self, _id=None):
        with self.browser:
            return self.browser.iter_chat_messages(_id)

    def send_chat_message(self, _id, message):
        with self.browser:
            return self.browser.send_chat_message(_id, message)

    #def start_chat_polling(self):
        #self._profile_walker = ProfilesWalker(self.weboob.scheduler, self.storage, self.browser)

    # ---- ICapAccount methods ---------------------

    ACCOUNT_REGISTER_PROPERTIES = ValuesDict(
                Value('username', label='Email address', regexp='^[^ ]+@[^ ]+\.[^ ]+$'),
                Value('password', label='Password', regexp='^[^ ]+$', masked=True),
                Value('sex',      label='Sex', choices={'m': 'Male', 'f': 'Female'}),
                Value('birthday', label='Birthday (dd/mm/yyyy)', regexp='^\d+/\d+/\d+$'),
                Value('zipcode',  label='Zipcode'),
                Value('country',  label='Country', choices={'fr': 'France', 'be': 'Belgique', 'ch': 'Suisse', 'ca': 'Canada'}, default='fr'),
                Value('godfather',label='Godfather', regexp='^\d*$', default=''),
               )

    @classmethod
    def register_account(klass, account):
        """
        Register an account on website

        This is a static method, it would be called even if the backend is
        instancied.

        @param account  an Account object which describe the account to create
        """
        browser = None
        bday, bmonth, byear = account.properties['birthday'].get().split('/', 2)
        while not browser:
            try:
                browser = klass.BROWSER(account.properties['username'].get())
                browser.register(password=   account.properties['password'].get(),
                                 sex=        (0 if account.properties['sex'].get() == 'm' else 1),
                                 birthday_d= int(bday),
                                 birthday_m= int(bmonth),
                                 birthday_y= int(byear),
                                 zipcode=    account.properties['zipcode'].get(),
                                 country=    account.properties['country'].get(),
                                 godfather=  account.properties['godfather'].get())
            except CaptchaError:
                getLogger('aum').info('Unable to resolve captcha. Retrying...')
                browser = None

    REGISTER_REGEXP = re.compile('.*http://www.adopteunmec.com/register4.php\?([^\' ]*)\'')
    def confirm_account(self, mail):
        msg = email.message_from_string(mail)

        content = u''
        for part in msg.walk():
            s = part.get_payload(decode=True)
            content += unicode(s, 'iso-8859-15')

        url = None
        for s in content.split():
            m = self.REGISTER_REGEXP.match(s)
            if m:
                url = '/register4.php?' + m.group(1)
                break

        if url:
            browser = self.create_browser('')
            browser.openurl(url)
            return True

        return False

    def get_account(self):
        """
        Get the current account.
        """
        raise NotImplementedError()

    def update_account(self, account):
        """
        Update the current account.
        """
        raise NotImplementedError()

    def get_account_status(self):
        with self.browser:
            return (
                    StatusField('myname', 'My name', self.browser.get_my_name()),
                    StatusField('score', 'Score', self.browser.score()),
                    StatusField('avcharms', 'Available charms', self.browser.nb_available_charms()),
                    StatusField('godchilds', 'Number of godchilds', self.browser.nb_godchilds()),
                   )

    OBJECTS = {Thread: fill_thread,
               Contact: fill_contact,
               ContactPhoto: fill_photo
              }