#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim: ft=python et softtabstop=4 cinoptions=4 shiftwidth=4 ts=4 ai

"""
Copyright(C) 2010  Romain Bignon

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

"""

from email.mime.text import MIMEText
from smtplib import SMTP
from email.Header import Header
from email.Utils import parseaddr, formataddr
import time
import sys

from weboob import Weboob
from weboob.capabilities import CAP_MAILS

class User:
    def __init__(self, username, password, email):
        self.username = username
        self.password = password
        self.email = email

class Application:
    APPNAME = 'weboob2mail'

    def __init__(self):
        self.weboob = Weboob(self.APPNAME)

    def main(self, argv):
        self.weboob.loadmodules(CAP_MAILS)

        self.weboob.schedule(interval, self.process)
        self.weboob.loop()

    def process(self):
        backends = self.weboob.getBackends()
        for b in backends:
            messages = b.getNewMessages()
            for m in messages:
                self.send_email(m)

    def send_email(self, mail):
        domain = ''
        recipient = ''

        reply_id = ''
        if mail.getReplyID():
            reply_id = u'%s@%s' % (mail.getFullReplyID(), domain)
        subject = u'%s%s' % ((reply_id) and 'Re: ' or '', mail.getTitle())
        sender = u'%s <%d@%s>' % (mail.getFrom(), mail.getThreadID(), domain)

        # assume that getDate() returns an UTC datetime
        date = time.strftime('%a, %d %b %Y %H:%M:%S +0000', mail.getDate().timetuple())
        msg_id = u'%s@%s' % (mail.getFullID(), domain)
        body = mail.getContent()

        body += u'\n\n-- \n'
        body += mail.getSignature()

        # Header class is smart enough to try US-ASCII, then the charset we
        # provide, then fall back to UTF-8.
        header_charset = 'ISO-8859-1'

        # We must choose the body charset manually
        for body_charset in 'US-ASCII', 'ISO-8859-1', 'UTF-8':
            try:
                body.encode(body_charset)
            except UnicodeError:
                pass
            else:
                break

        # Split real name (which is optional) and email address parts
        sender_name, sender_addr = parseaddr(sender)
        recipient_name, recipient_addr = parseaddr(recipient)

        # We must always pass Unicode strings to Header, otherwise it will
        # use RFC 2047 encoding even on plain ASCII strings.
        sender_name = str(Header(unicode(sender_name), header_charset))
        recipient_name = str(Header(unicode(recipient_name), header_charset))

        # Make sure email addresses do not contain non-ASCII characters
        sender_addr = sender_addr.encode('ascii')
        recipient_addr = recipient_addr.encode('ascii')

        # Create the message ('plain' stands for Content-Type: text/plain)
        msg = MIMEText(body.encode(body_charset), 'plain', body_charset)
        msg['From'] = formataddr((sender_name, sender_addr))
        msg['To'] = formataddr((recipient_name, recipient_addr))
        msg['Subject'] = Header(unicode(subject), header_charset)
        msg['Message-Id'] = msg_id
        msg['Date'] = date
        if reply_id:
            msg['In-Reply-To'] = reply_id

        # Send the message via SMTP to localhost:25
        smtp = SMTP(self.config['smtp'])
        smtp.sendmail(sender, recipient, msg.as_string())
        smtp.quit()

        return msg['Message-Id']

if __name__ == '__main__':
    app = Application()
    sys.exit(app.main(sys.argv))