#!/usr/bin/python
#
# telepathy-butterfly - an MSN connection manager for Telepathy
#
# Copyright (C) 2006-2007 Ali Sabil <ali.sabil@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import gobject
import dbus.glib
import signal
import os
import sys
import logging

version = (0, 5, 15)

if sys.version_info < (2, 5):
    print >> sys.stderr, 'Critical: python >= 2.5 required. Exiting.'
    sys.exit(1)

import telepathy
if telepathy.version < (0, 15, 19):
    print >> sys.stderr, 'Critical: telepathy-python >= 0.15.19 required. Exiting.'
    sys.exit(1)

import papyon
if papyon.version < (0, 5, 3):
    print >> sys.stderr, 'Critical: papyon >= 0.5.3 required. Exiting.'
    sys.exit(1)


from telepathy.utils import debug_divert_messages

debug_divert_messages(os.getenv('BUTTERFLY_LOGFILE'))
logging.basicConfig(level=logging.DEBUG)

from butterfly import ButterflyConnectionManager
from butterfly import ButterflyDebug
from butterfly.util.decorator import async

logger = logging.getLogger('Butterfly')

IDLE_TIMEOUT = 5
PROCESS_NAME = 'telepathy-butterfly'

if __name__ == '__main__':
    try: # change process name for killall
       import ctypes
       libc = ctypes.CDLL('libc.so.6')
       libc.prctl(15, PROCESS_NAME, 0, 0, 0)
    except Exception, e:
       logger.warning('Unable to set processName: %s" % e')

    @async
    def quit():
        manager.quit()
        mainloop.quit()

    # We only want to log to stderr if BUTTERFLY_DEBUG=all is set, but
    # we want any other logging handlers to work fine (such as the
    # debug sender one).
    if os.environ.get('BUTTERFLY_DEBUG', None) != 'all':
        # This dummy stream will replace sys.stderr.
        class DummyStream(object):
            def write(self, s):
                pass

        # First, replace the original stderr with our new dummy stream.
        sys.stderr = DummyStream()

        # The root handler has already had the original stderr set on it,
        # so let's override that.
        stderr_handler = logging.root.handlers[0]
        stderr_handler.stream = sys.stderr

    if 'BUTTERFLY_PERSIST' not in os.environ:
        def timeout_cb():
            if len(manager._connections) == 0:
                logger.info('No connection received - quitting')
                quit()
            return False
        gobject.timeout_add_seconds(IDLE_TIMEOUT, timeout_cb)
        shutdown_callback = quit
    else:
        shutdown_callback = None

    signal.signal(signal.SIGTERM, lambda : quit)

    try:
        manager = ButterflyConnectionManager(shutdown_func=shutdown_callback)
        handler = ButterflyDebug(manager)
    except dbus.exceptions.NameExistsException:
        logger.warning('Failed to acquire bus name, connection manager already running?')
        sys.exit(1)

    def v2str(version):
        return ".".join(map(lambda x: str(x), version))
    logger.info("Starting butterfly %s: telepathy-python %s, papyon %s" %
            (v2str(version), v2str(telepathy.version), v2str(papyon.version)))


    mainloop = gobject.MainLoop(is_running=True)
    gobject.threads_init()

    while mainloop.is_running():
        try:
            mainloop.run()
        except KeyboardInterrupt:
            quit()