# Slixmpp: The Slick XMPP Library
# Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.

import logging

from slixmpp import Iq, Message, Presence
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_0297 import stanza, Forwarded


class XEP_0297(BasePlugin):

    name = 'xep_0297'
    description = 'XEP-0297: Stanza Forwarding'
    dependencies = {'xep_0030', 'xep_0203'}
    stanza = stanza

    def plugin_init(self):
        register_stanza_plugin(Message, Forwarded)

        # While these are marked as iterable, that is just for
        # making it easier to extract the forwarded stanza. There
        # still can be only a single forwarded stanza.
        register_stanza_plugin(Forwarded, Message, iterable=True)
        register_stanza_plugin(Forwarded, Presence, iterable=True)
        register_stanza_plugin(Forwarded, Iq, iterable=True)

        register_stanza_plugin(Forwarded, self.xmpp['xep_0203'].stanza.Delay)

        self.xmpp.register_handler(
            Callback('Forwarded Stanza',
                StanzaPath('message/forwarded'),
                self._handle_forwarded))

    def session_bind(self, jid):
        self.xmpp['xep_0030'].add_feature('urn:xmpp:forward:0')

    def plugin_end(self):
        self.xmpp['xep_0030'].del_feature(feature='urn:xmpp:forward:0')
        self.xmpp.remove_handler('Forwarded Stanza')

    def forward(self, stanza=None, mto=None, mbody=None, mfrom=None, delay=None):
        stanza.stream = None

        msg = self.xmpp.Message()
        msg['to'] = mto
        msg['from'] = mfrom
        msg['body'] = mbody
        msg['forwarded']['stanza'] = stanza
        if delay is not None:
            msg['forwarded']['delay']['stamp'] = delay
        msg.send()

    def _handle_forwarded(self, msg):
        self.xmpp.event('forwarded_stanza', msg)