#!/usr/bin/env python3

import logging
import os
from datetime import datetime
from getpass import getpass
from argparse import ArgumentParser

import slixmpp


class MUCBot(slixmpp.ClientXMPP):
    def __init__(self, jid, password, rooms, nick):
        slixmpp.ClientXMPP.__init__(self, jid, password)

        self.rooms = rooms
        self.nick = nick

        self.add_event_handler("session_start", self.start)
        self.add_event_handler("groupchat_message", self.muc_message)
        for room in self.rooms:
            self.add_event_handler("muc::%s::got_online" % room, self.muc_online)
            self.add_event_handler("muc::%s::got_offline" % room, self.muc_offline)


    def start(self, event):
        for room in self.rooms:
            self.plugin['xep_0045'].join_muc(room,
                                             self.nick,
                                             # If a room password is needed, use:
                                             # password=the_room_password,
                                             wait=True)

    def muc_message(self, message):
        room = message['from'].bare
        nick = message['from'].resource
        self.log(room, 'R', '<%s>  %s' % (message['from'].resource, message['body']))

    def muc_online(self, presence):
        room = presence['muc']['room']
        nick = presence['muc']['nick']
        status = ' (%s)' % presence['status'] if presence['status'] else ''
        self.log(room, 'I', '---> %s joined the room%s' % (nick, status))

    def muc_offline(self, presence):
        room = presence['muc']['room']
        nick = presence['muc']['nick']
        status = ' (%s)' % presence['status'] if presence['status'] else ''
        self.log(room, 'I', '<--- %s left the room%s' % (nick, status))

    def log(self, room, typ, message):
        now = datetime.utcnow()
        day = now.strftime('%Y-%m-%d')
        filename = '%s/%s.log' % (room, day)
        os.makedirs(room, exist_ok=True)
        with open(filename, 'a') as out:
            timestamp = now.isoformat() + 'Z'
            split_message = message.split('\n')
            nb_lines = len(split_message) - 1
            final_message = '\n '.join(split_message)
            lines = 'M%s %s %03d %s\n' % (typ, timestamp, nb_lines, final_message)
            out.write(lines)


if __name__ == '__main__':
    # Setup the command line arguments.
    parser = ArgumentParser()

    # Output verbosity options.
    parser.add_argument("-q", "--quiet", help="set logging to ERROR",
                        action="store_const", dest="loglevel",
                        const=logging.ERROR, default=logging.INFO)
    parser.add_argument("-d", "--debug", help="set logging to DEBUG",
                        action="store_const", dest="loglevel",
                        const=logging.DEBUG, default=logging.INFO)

    # JID and password options.
    parser.add_argument("-j", "--jid", dest="jid",
                        help="JID to use")
    parser.add_argument("-p", "--password", dest="password",
                        help="password to use")
    parser.add_argument("-r", "--rooms", dest="rooms", nargs='+',
                        help="MUC rooms to join")
    parser.add_argument("-n", "--nick", dest="nick",
                        help="MUC nickname")

    args = parser.parse_args()

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

    if args.jid is None:
        args.jid = input("Username: ")
    if args.password is None:
        args.password = getpass("Password: ")
    if args.rooms is None:
        args.rooms = input("MUC rooms: ")
    if args.nick is None:
        args.nick = input("MUC nickname: ")

    # Setup the MUCBot and register plugins. Note that while plugins may
    # have interdependencies, the order in which you register them does
    # not matter.
    xmpp = MUCBot(args.jid, args.password, args.rooms, args.nick)
    xmpp.register_plugin('xep_0030') # Service Discovery
    xmpp.register_plugin('xep_0045') # Multi-User Chat
    xmpp.register_plugin('xep_0199') # XMPP Ping

    # Connect to the XMPP server and start processing XMPP stanzas.
    xmpp.connect()
    xmpp.process()