#!/usr/bin/env python

# Copyright (C) 2006-2008, Red Hat, Inc.
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import os
import sys

# Change the default encoding to avoid UnicodeDecodeError
# http://lists.sugarlabs.org/archive/sugar-devel/2012-August/038928.html
reload(sys)
sys.setdefaultencoding('utf-8')

import gettext
from optparse import OptionParser

import dbus
import dbus.service
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)

from sugar3.activity import activityhandle
from sugar3.activity import i18n
import sugar3
from sugar3.bundle.activitybundle import ActivityBundle
from sugar3 import logger


def create_activity_instance(constructor, handle):
    activity = constructor(handle)
    activity.show()
    return activity


def get_single_process_name(bundle_id):
    return bundle_id


def get_single_process_path(bundle_id):
    return '/' + bundle_id.replace('.', '/')


class SingleProcess(dbus.service.Object):

    def __init__(self, name_service, constructor):
        self.constructor = constructor

        bus = dbus.SessionBus()
        bus_name = dbus.service.BusName(name_service, bus=bus)
        object_path = get_single_process_path(name_service)
        dbus.service.Object.__init__(self, bus_name, object_path)

    @dbus.service.method('org.laptop.SingleProcess', in_signature='a{sv}')
    def create(self, handle_dict):
        handle = activityhandle.create_from_dict(handle_dict)
        create_activity_instance(self.constructor, handle)

def main():
    parser = OptionParser()
    parser.add_option('-b', '--bundle-id', dest='bundle_id',
                      help='identifier of the activity bundle')
    parser.add_option('-a', '--activity-id', dest='activity_id',
                      help='identifier of the activity instance')
    parser.add_option('-o', '--object-id', dest='object_id',
                      help='identifier of the associated datastore object')
    parser.add_option('-u', '--uri', dest='uri',
                      help='URI to load')
    parser.add_option('-s', '--single-process', dest='single_process',
                      action='store_true',
                      help='start all the instances in the same process')
    parser.add_option('-i', '--invited', dest='invited',
                      action='store_true', default=False,
                      help='the activity is being launched for handling an '
                           'invite from the network')
    (options, args) = parser.parse_args()

    logger.start()

    if 'SUGAR_BUNDLE_PATH' not in os.environ:
        print 'SUGAR_BUNDLE_PATH is not defined in the environment.'
        sys.exit(1)

    if len(args) == 0:
        print 'A python class must be specified as first argument.'
        sys.exit(1)

    bundle_path = os.environ['SUGAR_BUNDLE_PATH']
    sys.path.append(bundle_path)

    bundle = ActivityBundle(bundle_path)

    os.environ['SUGAR_BUNDLE_ID'] = bundle.get_bundle_id()
    os.environ['SUGAR_BUNDLE_NAME'] = bundle.get_name()
    os.environ['SUGAR_BUNDLE_VERSION'] = str(bundle.get_activity_version())

    # must be done early, some activities set translations globally, SL #3654
    locale_path = i18n.get_locale_path(bundle.get_bundle_id())
    if locale_path:
        gettext.bindtextdomain(bundle.get_bundle_id(), locale_path)
        gettext.bindtextdomain('sugar-toolkit', sugar3.locale_path)
        gettext.textdomain(bundle.get_bundle_id())

    splitted_module = args[0].rsplit('.', 1)
    module_name = splitted_module[0]
    class_name = splitted_module[1]

    module = __import__(module_name)
    for comp in module_name.split('.')[1:]:
        module = getattr(module, comp)

    activity_constructor = getattr(module, class_name)
    activity_handle = activityhandle.ActivityHandle(
            activity_id=options.activity_id,
            object_id=options.object_id, uri=options.uri,
            invited=options.invited)

    if options.single_process is True:
        sessionbus = dbus.SessionBus()

        service_name = get_single_process_name(options.bundle_id)
        service_path = get_single_process_path(options.bundle_id)

        bus_object = sessionbus.get_object(
                'org.freedesktop.DBus', '/org/freedesktop/DBus')
        try:
            name = bus_object.GetNameOwner(
                    service_name, dbus_interface='org.freedesktop.DBus')
        except  dbus.DBusException:
            name = None

        if not name:
            SingleProcess(service_name, activity_constructor)
        else:
            single_process = sessionbus.get_object(service_name, service_path)
            single_process.create(activity_handle.get_dict(),
                                  dbus_interface='org.laptop.SingleProcess')

            print 'Created %s in a single process.' % service_name
            sys.exit(0)

    if hasattr(module, 'start'):
        module.start()

    instance = create_activity_instance(activity_constructor, activity_handle)

    if hasattr(instance, 'run_main_loop'):
        instance.run_main_loop()

main()