"""Support code for implementing D-Bus services via GObjects."""

# Copyright (C) 2007 Collabora Ltd. <http://www.collabora.co.uk/>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use, copy,
# modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# DEALINGS IN THE SOFTWARE.

import sys
from warnings import warn as _warn
_warn(DeprecationWarning("""\
dbus.gobject_service is deprecated, and is not available under Python 3.

Porting from gobject (PyGObject 2) to gi.repository.GObject (PyGObject 3),
and using dbus.gi_service instead of dbus.gobject_service, is recommended.
"""), DeprecationWarning, stacklevel=2)

if 'gi' in sys.modules:
    # this worked in dbus-python 1.0, so preserve the functionality
    from gi.repository import GObject as gobject
else:
    # this worked in dbus-python < 1.0
    import gobject

import dbus.service

class ExportedGObjectType(gobject.GObject.__class__, dbus.service.InterfaceType):
    """A metaclass which inherits from both GObjectMeta and
    `dbus.service.InterfaceType`. Used as the metaclass for `ExportedGObject`.
    """
    def __init__(cls, name, bases, dct):
        gobject.GObject.__class__.__init__(cls, name, bases, dct)
        dbus.service.InterfaceType.__init__(cls, name, bases, dct)

class ExportedGObject(gobject.GObject, dbus.service.Object):
    """A GObject which is exported on the D-Bus.

    Because GObject and `dbus.service.Object` both have custom metaclasses,
    the naive approach using simple multiple inheritance won't work. This
    class has `ExportedGObjectType` as its metaclass, which is sufficient
    to make it work correctly.
    """
    __metaclass__ = ExportedGObjectType

    def __init__(self, conn=None, object_path=None, **kwargs):
        """Initialize an exported GObject.

        :Parameters:
            `conn` : dbus.connection.Connection
                The D-Bus connection or bus
            `object_path` : str
                The object path at which to register this object.
        :Keywords:
            `bus_name` : dbus.service.BusName
                A bus name to be held on behalf of this object, or None.
            `gobject_properties` : dict
                GObject properties to be set on the constructed object.

                Any unrecognised keyword arguments will also be interpreted
                as GObject properties.
            """
        bus_name = kwargs.pop('bus_name', None)
        gobject_properties = kwargs.pop('gobject_properties', None)

        if gobject_properties is not None:
            kwargs.update(gobject_properties)
        gobject.GObject.__init__(self, **kwargs)
        dbus.service.Object.__init__(self, conn=conn,
                                     object_path=object_path,
                                     bus_name=bus_name)
