/***************************************************************************

  c_dbusconnection.c

  (c) 2000-2017 Benoît Minisini <g4mba5@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, 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 Street, Fifth Floor, Boston,
  MA 02110-1301, USA.

***************************************************************************/

#define __C_DBUSCONNECTION_C

#include "helper.h"
#include "c_dbusconnection.h"

static CDBUSCONNECTION *_system = NULL;
static CDBUSCONNECTION *_session = NULL;

static DBusConnection *get_bus(DBusBusType type)
{
	DBusConnection *conn;
	
	conn = dbus_bus_get(type, NULL);
	if (!conn)
		GB.Error("Cannot connect to the &1 bus", type == DBUS_BUS_SYSTEM ? "system" : "session");
	else
		dbus_connection_set_exit_on_disconnect(conn, FALSE);
	
	return conn;
}

CDBUSCONNECTION *CDBUSCONNECTION_get(DBusBusType type)
{
	DBusConnection *conn;
	
	if (type == DBUS_BUS_SYSTEM)
	{
		if (!_system)
		{
			conn = get_bus(type);
			if (conn)
			{
				_system = GB.New(GB.FindClass("DBusConnection"), NULL, NULL);
				GB.Ref(_system);
				_system->connection = conn;
			}
		}
		return _system;
	}
	else if (type == DBUS_BUS_SESSION)
	{
		if (!_session)
		{
			conn = get_bus(type);
			if (conn)
			{
				_session = GB.New(GB.FindClass("DBusConnection"), NULL, NULL);
				GB.Ref(_session);
				_session->connection = conn;
			}
		}
		return _session;
	}
	else
		return NULL;
}

BEGIN_METHOD_VOID(DBusConnection_exit)

	GB.Unref(POINTER(&_session));
	GB.Unref(POINTER(&_system));

END_METHOD

BEGIN_METHOD_VOID(DBusConnection_free)

	GB.StoreVariant(NULL, &THIS->tag);
	dbus_connection_unref(THIS->connection);

END_METHOD

BEGIN_METHOD(DBusConnection_Introspect, GB_STRING application; GB_STRING object)

	char *application = GB.ToZeroString(ARG(application));
	char *object;

	if (!MISSING(object))
		object = GB.ToZeroString(ARG(object));	
	else
		object = "/";
	
	GB.ReturnNewZeroString(DBUS_introspect(THIS->connection, application, object));

END_METHOD

BEGIN_METHOD(DBusConnection_CallMethod, GB_STRING application; GB_STRING object; GB_STRING interface; GB_STRING method; 
             GB_STRING input_signature; GB_STRING output_signature; GB_OBJECT arguments)

	char *application = GB.ToZeroString(ARG(application));
	char *object = GB.ToZeroString(ARG(object));
	char *interface = GB.ToZeroString(ARG(interface));
	char *method = GB.ToZeroString(ARG(method));
	char *input_signature = GB.ToZeroString(ARG(input_signature));
	char *output_signature = GB.ToZeroString(ARG(output_signature));
	
	if (DBUS_validate_path(object, LENGTH(object)))
	{
		GB.Error("Invalid object path");
		return;
	}
	
	if (!*interface)
		interface = NULL;
	else if (DBUS_validate_interface(interface, LENGTH(interface)))
	{
		GB.Error("Invalid interface name");
		return;
	}
	
	if (DBUS_validate_method(method, LENGTH(method)))
	{
		GB.Error("Invalid method name");
		return;
	}
	
	if (DBUS_call_method(THIS->connection, application, object, interface, method, input_signature, output_signature, VARG(arguments)))
		return;

	GB.ReturnConvVariant();
	
END_METHOD

BEGIN_METHOD(DBusConnection_SendSignal, GB_STRING object; GB_STRING interface; GB_STRING signal; GB_STRING input_signature; GB_OBJECT arguments)

	char *object = GB.ToZeroString(ARG(object));
	char *interface = GB.ToZeroString(ARG(interface));
	char *signal = GB.ToZeroString(ARG(signal));
	char *input_signature = GB.ToZeroString(ARG(input_signature));
	
	if (DBUS_validate_path(object, LENGTH(object)))
	{
		GB.Error("Invalid object path");
		return;
	}
	
	if (!*interface)
		interface = NULL;
	else if (DBUS_validate_interface(interface, LENGTH(interface)))
	{
		GB.Error("Invalid interface name");
		return;
	}
	
	if (DBUS_validate_method(signal, LENGTH(signal)))
	{
		GB.Error("Invalid signal name");
		return;
	}
	
	if (DBUS_send_signal(THIS->connection, object, interface, signal, input_signature, VARG(arguments)))
		return;

END_METHOD

BEGIN_PROPERTY(DBusConnection_Applications)

	DBUS_call_method(THIS->connection, "org.freedesktop.DBus", "/", "org.freedesktop.DBus", "ListNames", "", "as", NULL);

END_PROPERTY


BEGIN_METHOD(DBusConnection_RequestName, GB_STRING name; GB_BOOLEAN unique)

	bool ret = DBUS_register(THIS->connection, GB.ToZeroString(ARG(name)), VARGOPT(unique, FALSE));
	
	GB.ReturnBoolean(ret);
	
END_METHOD


BEGIN_METHOD(DBusConnection_ReleaseName, GB_STRING name)

	bool ret = DBUS_unregister(THIS->connection, GB.ToZeroString(ARG(name)));
	
	GB.ReturnBoolean(ret);
	
END_METHOD


BEGIN_PROPERTY(DBusConnection_Name)

	GB.ReturnNewZeroString(dbus_bus_get_unique_name(THIS->connection));

END_PROPERTY

BEGIN_METHOD(DBusConnection_Register, GB_OBJECT object; GB_STRING path; GB_OBJECT interfaces)

	GB_FUNCTION func;
	void *object = VARG(object);
	
	if (GB.CheckObject(object))
		return;

	if (GB.GetFunction(&func, object, "_Register", NULL, NULL))
	{
		GB.Error("Cannot find _Register method");
		return;
	}
	
	if (MISSING(interfaces))
	{
		GB.Push(2, GB_T_OBJECT, THIS, GB_T_STRING, STRING(path), LENGTH(path));
		GB.Call(&func, 2, TRUE);
	}
	else
	{
		GB.Push(3, GB_T_OBJECT, THIS, GB_T_STRING, STRING(path), LENGTH(path), GB_T_OBJECT, VARG(interfaces));
		GB.Call(&func, 3, TRUE);
	}

END_METHOD

BEGIN_METHOD(DBusConnection_Unregister, GB_OBJECT object)

	GB_FUNCTION func;
	void *object = VARG(object);
	
	if (GB.CheckObject(object))
		return;

	if (GB.GetFunction(&func, object, "_Unregister", NULL, NULL))
	{
		GB.Error("Cannot find _Unregister method");
		return;
	}
	
	GB.Push(1, GB_T_OBJECT, THIS);
	GB.Call(&func, 1, TRUE);

END_METHOD

BEGIN_PROPERTY(DBusConnection_Tag)

	if (READ_PROPERTY)
		GB.ReturnVariant(&THIS->tag);
	else
		GB.StoreVariant(PROP(GB_VARIANT), POINTER(&(THIS->tag)));

END_METHOD


GB_DESC CDBusConnectionDesc[] =
{
  GB_DECLARE("DBusConnection", sizeof(CDBUSCONNECTION)), GB_NOT_CREATABLE(),

	GB_STATIC_METHOD("_exit", NULL, DBusConnection_exit, NULL),
	GB_METHOD("_free", NULL, DBusConnection_free, NULL),
	GB_METHOD("_Introspect", "s", DBusConnection_Introspect, "(Application)s[(Object)s]"),
	GB_METHOD("_CallMethod", "v", DBusConnection_CallMethod, "(Application)s(Object)s(Interface)s(Method)s(InputSignature)s(OutputSignature)s(Arguments)Array;"),
	GB_METHOD("_SendSignal", "v", DBusConnection_SendSignal, "(Object)s(Interface)s(Signal)s(InputSignature)s(Arguments)Array;"),
	//GB_METHOD("_AddMatch", "b", DBusConnection_AddMatch, "(Type)s[(Object)s(Member)s(Interface)s(Destination)s]"),
	//GB_METHOD("_RemoveMatch", "b", DBusConnection_RemoveMatch, "(Type)s[(Object)s(Member)s(Interface)s(Destination)s]"),
	GB_PROPERTY_READ("Applications", "String[]", DBusConnection_Applications),
	GB_METHOD("_RequestName", "b", DBusConnection_RequestName, "(Name)s[(Unique)b]"),
	GB_METHOD("_ReleaseName", "b", DBusConnection_ReleaseName, "(Name)s"),
	GB_PROPERTY_READ("_Name", "s", DBusConnection_Name),
	GB_METHOD("Register", NULL, DBusConnection_Register, "(Object)DBusObject;(Path)s[(Interface)String[];]"),
	GB_METHOD("Unregister", NULL, DBusConnection_Unregister, "(Object)DBusObject;"),
	GB_PROPERTY("Tag", "v", DBusConnection_Tag),

  GB_END_DECLARE
};