# Slixmpp: The Slick XMPP Library
# Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permissio
import logging

import slixmpp
from slixmpp.stanza import Message
from slixmpp.xmlstream.handler import Callback
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.xmlstream import register_stanza_plugin, ElementBase, ET
from slixmpp.plugins import BasePlugin
from slixmpp.plugins.xep_0085 import stanza, ChatState


log = logging.getLogger(__name__)


class XEP_0085(BasePlugin):

    """
    XEP-0085 Chat State Notifications
    """

    name = 'xep_0085'
    description = 'XEP-0085: Chat State Notifications'
    dependencies = {'xep_0030'}
    stanza = stanza

    def plugin_init(self):
        self.xmpp.register_handler(
            Callback('Chat State',
                     StanzaPath('message/chat_state'),
                     self._handle_chat_state))

        register_stanza_plugin(Message, stanza.Active)
        register_stanza_plugin(Message, stanza.Composing)
        register_stanza_plugin(Message, stanza.Gone)
        register_stanza_plugin(Message, stanza.Inactive)
        register_stanza_plugin(Message, stanza.Paused)

    def plugin_end(self):
        self.xmpp.remove_handler('Chat State')

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

    def _handle_chat_state(self, msg):
        state = msg['chat_state']
        log.debug("Chat State: %s, %s", state, msg['from'].jid)
        self.xmpp.event('chatstate', msg)
        self.xmpp.event('chatstate_%s' % state, msg)