"""
    Slixmpp: The Slick XMPP Library
    Copyright (C) 2011 Nathanael C. Fritz, Dalek
    This file is part of Slixmpp.

    See the file LICENSE for copying permission.
"""

import logging

import slixmpp
from slixmpp import Message
from slixmpp.plugins import BasePlugin
from slixmpp.xmlstream import register_stanza_plugin
from slixmpp.xmlstream.handler import Callback
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.plugins.xep_0249 import Invite, stanza


log = logging.getLogger(__name__)


class XEP_0249(BasePlugin):

    """
    XEP-0249: Direct MUC Invitations
    """

    name = 'xep_0249'
    description = 'XEP-0249: Direct MUC Invitations'
    dependencies = set(['xep_0030'])
    stanza = stanza

    def plugin_init(self):
        self.xmpp.register_handler(
                Callback('Direct MUC Invitations',
                         StanzaPath('message/groupchat_invite'),
                         self._handle_invite))

        register_stanza_plugin(Message, Invite)

    def plugin_end(self):
        self.xmpp['xep_0030'].del_feature(feature=Invite.namespace)
        self.xmpp.remove_handler('Direct MUC Invitations')

    def session_bind(self, jid):
        self.xmpp['xep_0030'].add_feature(Invite.namespace)

    def _handle_invite(self, msg):
        """
        Raise an event for all invitations received.
        """
        log.debug("Received direct muc invitation from %s to room %s",
                  msg['from'], msg['groupchat_invite']['jid'])

        self.xmpp.event('groupchat_direct_invite', msg)

    def send_invitation(self, jid, roomjid, password=None,
                        reason=None, ifrom=None):
        """
        Send a direct MUC invitation to an XMPP entity.

        Arguments:
            jid      -- The JID of the entity that will receive
                        the invitation
            roomjid  -- the address of the groupchat room to be joined
            password -- a password needed for entry into a
                        password-protected room (OPTIONAL).
            reason   -- a human-readable purpose for the invitation
                        (OPTIONAL).
        """

        msg = self.xmpp.Message()
        msg['to'] = jid
        if ifrom is not None:
            msg['from'] = ifrom
        msg['groupchat_invite']['jid'] = roomjid
        if password is not None:
            msg['groupchat_invite']['password'] = password
        if reason is not None:
            msg['groupchat_invite']['reason'] = reason

        return msg.send()