#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
import logging
import getpass
from optparse import OptionParser

import slixmpp
from slixmpp.xmlstream import ET, tostring
from slixmpp.xmlstream.matcher import StanzaPath
from slixmpp.xmlstream.handler import Callback


# Python versions before 3.0 do not use UTF-8 encoding
# by default. To ensure that Unicode is handled properly
# throughout Slixmpp, we will set the default encoding
# ourselves to UTF-8.
if sys.version_info < (3, 0):
    from slixmpp.util.misc_ops import setdefaultencoding
    setdefaultencoding('utf8')
else:
    raw_input = input


class PubsubEvents(slixmpp.ClientXMPP):

    def __init__(self, jid, password):
        super(PubsubEvents, self).__init__(jid, password)

        self.register_plugin('xep_0030')
        self.register_plugin('xep_0059')
        self.register_plugin('xep_0060')

        self.add_event_handler('session_start', self.start)

        # Some services may require configuration to allow
        # sending delete, configuration, or subscription  events.
        self.add_event_handler('pubsub_publish', self._publish)
        self.add_event_handler('pubsub_retract', self._retract)
        self.add_event_handler('pubsub_purge', self._purge)
        self.add_event_handler('pubsub_delete', self._delete)
        self.add_event_handler('pubsub_config', self._config)
        self.add_event_handler('pubsub_subscription', self._subscription)

        # Want to use nicer, more specific pubsub event names?
        # self['xep_0060'].map_node_event('node_name', 'event_prefix')
        # self.add_event_handler('event_prefix_publish', handler)
        # self.add_event_handler('event_prefix_retract', handler)
        # self.add_event_handler('event_prefix_purge', handler)
        # self.add_event_handler('event_prefix_delete', handler)

    def start(self, event):
        self.get_roster()
        self.send_presence()

    def _publish(self, msg):
        """Handle receiving a publish item event."""
        print('Published item %s to %s:' % (
            msg['pubsub_event']['items']['item']['id'],
            msg['pubsub_event']['items']['node']))
        data = msg['pubsub_event']['items']['item']['payload']
        if data is not None:
            print(tostring(data))
        else:
            print('No item content')

    def _retract(self, msg):
        """Handle receiving a retract item event."""
        print('Retracted item %s from %s' % (
            msg['pubsub_event']['items']['retract']['id'],
            msg['pubsub_event']['items']['node']))

    def _purge(self, msg):
        """Handle receiving a node purge event."""
        print('Purged all items from %s' % (
            msg['pubsub_event']['purge']['node']))

    def _delete(self, msg):
        """Handle receiving a node deletion event."""
        print('Deleted node %s' % (
           msg['pubsub_event']['delete']['node']))

    def _config(self, msg):
        """Handle receiving a node configuration event."""
        print('Configured node %s:' % (
            msg['pubsub_event']['configuration']['node']))
        print(msg['pubsub_event']['configuration']['form'])

    def _subscription(self, msg):
        """Handle receiving a node subscription event."""
        print('Subscription change for node %s:' % (
            msg['pubsub_event']['subscription']['node']))
        print(msg['pubsub_event']['subscription'])


if __name__ == '__main__':
    # Setup the command line arguments.
    optp = OptionParser()

    # Output verbosity options.
    optp.add_option('-q', '--quiet', help='set logging to ERROR',
                    action='store_const', dest='loglevel',
                    const=logging.ERROR, default=logging.INFO)
    optp.add_option('-d', '--debug', help='set logging to DEBUG',
                    action='store_const', dest='loglevel',
                    const=logging.DEBUG, default=logging.INFO)
    optp.add_option('-v', '--verbose', help='set logging to COMM',
                    action='store_const', dest='loglevel',
                    const=5, default=logging.INFO)

    # JID and password options.
    optp.add_option("-j", "--jid", dest="jid",
                    help="JID to use")
    optp.add_option("-p", "--password", dest="password",
                    help="password to use")

    opts, args = optp.parse_args()

    # Setup logging.
    logging.basicConfig(level=opts.loglevel,
                        format='%(levelname)-8s %(message)s')

    if opts.jid is None:
        opts.jid = raw_input("Username: ")
    if opts.password is None:
        opts.password = getpass.getpass("Password: ")

    logging.info("Run this in conjunction with the pubsub_client.py " + \
                 "example to watch events happen as you give commands.")

    # Setup the PubsubEvents listener
    xmpp = PubsubEvents(opts.jid, opts.password)

    # If you are working with an OpenFire server, you may need
    # to adjust the SSL version used:
    # xmpp.ssl_version = ssl.PROTOCOL_SSLv3

    # If you want to verify the SSL certificates offered by a server:
    # xmpp.ca_certs = "path/to/ca/cert"

    # Connect to the XMPP server and start processing XMPP stanzas.
    if xmpp.connect():
        # If you do not have the dnspython library installed, you will need
        # to manually specify the name of the server if it does not match
        # the one in the JID. For example, to use Google Talk you would
        # need to use:
        #
        # if xmpp.connect(('talk.google.com', 5222)):
        #     ...
        xmpp.process(block=True)
        print("Done")
    else:
        print("Unable to connect.")