/* $Id$ */

/***
  This file is part of avahi.
 
  avahi is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.
 
  avahi 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 Lesser General
  Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with avahi; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#include <glib.h>

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#define DBUS_API_SUBJECT_TO_CHANGE
#include <dbus/dbus.h>
#include <dbus/dbus-glib-lowlevel.h>
    
#include "dbus-protocol.h"

static DBusConnection *bus = NULL;

static DBusHandlerResult
do_register (DBusConnection *conn, DBusMessage *message)
{
    DBusError error;
    char *s;

    dbus_error_init (&error);

    dbus_message_get_args (message, &error,
                           DBUS_TYPE_STRING, &s,
                           DBUS_TYPE_INVALID);

    if (dbus_error_is_set (&error))
    {
        g_warning ("Error parsing register attempt");
        dbus_error_free (&error);

        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
    }

    g_message ("Register received from: %s (dbus:% s)", s, dbus_message_get_sender (message));

    return DBUS_HANDLER_RESULT_HANDLED;
}

static DBusHandlerResult
signal_filter (DBusConnection *conn, DBusMessage *message, void *user_data)
{
    GMainLoop *loop = user_data;
    DBusError error;

    dbus_error_init (&error);

    g_message ("dbus: interface=%s, path=%s, member=%s",
               dbus_message_get_interface (message),
               dbus_message_get_path (message),
               dbus_message_get_member (message));

    if (dbus_message_is_signal (message,
#ifdef DBUS_USE_NEW_API
			    	DBUS_INTERFACE_LOCAL,
#else
                                DBUS_INTERFACE_ORG_FREEDESKTOP_LOCAL,
#endif
                                "Disconnected"))
    {
        /* No, we shouldn't quit, but until we get somewhere
         * usefull such that we can restore our state, we will */
        g_warning ("Disconnnected from d-bus, terminating...");

        g_main_loop_quit (loop);
        return DBUS_HANDLER_RESULT_HANDLED;
    } else if (dbus_message_is_method_call (message, DBUS_SERVICE_AVAHI,
                                            "Register"))
    {
        return do_register (conn, message);
    } else if (dbus_message_is_signal (message,
#ifdef DBUS_USE_NEW_API
			    	       DBUS_INTERFACE_DBUS,
				       "NameAcquired"))
#else
                                       DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS,
                                       "ServiceAcquired"))
#endif
    {
        char *name;

        dbus_message_get_args (message, &error,
                               DBUS_TYPE_STRING, &name,
                               DBUS_TYPE_INVALID);

        if (dbus_error_is_set (&error))
        {
            g_warning ("Error parsing NameAcquired message");
            dbus_error_free (&error);

            return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
        }

        g_message ("dbus: ServiceAcquired (%s)", name);

        return DBUS_HANDLER_RESULT_HANDLED;
    }

    g_message ("dbus: missed event");

    return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}

int
dbus_protocol_setup (GMainLoop *loop)
{
    DBusError error;

    dbus_error_init (&error);

    bus = dbus_bus_get (DBUS_BUS_SYSTEM, &error);

    if (bus == NULL)
    {
        g_warning ("dbus_bus_get(): %s", error.message);
        dbus_error_free (&error);

	return 1;
    }

    dbus_connection_setup_with_g_main (bus, NULL);
    dbus_connection_set_exit_on_disconnect (bus, FALSE);

#ifdef DBUS_USE_NEW_API
    dbus_bus_request_name (bus, DBUS_SERVICE_AVAHI, 0, &error);
#else
    dbus_bus_acquire_service (bus, DBUS_SERVICE_AVAHI, 0, &error);
#endif

    if (dbus_error_is_set (&error))
    {
        g_warning ("dbus_error_is_set (): %s", error.message);
        dbus_error_free (&error);

    	return 1;
    }

    dbus_connection_add_filter (bus, signal_filter, loop, NULL);
    dbus_bus_add_match (bus,
                        "type='method_call',interface='org.freedesktop.Avahi'",
                        &error);

    if (dbus_error_is_set (&error))
    {
        g_warning ("dbus_bus_add_match (): %s", error.message);
        dbus_error_free (&error);

    	return 1;
    }

    return 0;
}

void
dbus_protocol_shutdown ()
{
    if (bus) {
        dbus_connection_disconnect(bus);
        dbus_connection_unref(bus);
    }
}