#include <config.h>
#ifdef DBUS_ENABLE
#include <gpsd_dbus.h>
#include <stdio.h>

static DBusConnection* connection = NULL;

/*
 * Does what is required to initialize the dbus connection
 * This is pretty basic at this point, as we don't receive commands via dbus.
 * Returns 0 when everything is OK.
 */
int initialize_dbus_connection(void) {
    DBusError	error;

    dbus_error_init(&error);
    connection = dbus_bus_get (DBUS_BUS_SYSTEM, &error);
    if (connection == NULL) {
	/* report error */
	return 1;
    }
    return 0;
}

void send_dbus_fix(struct gps_device_t* channel) {
/* sends the current fix data for this channel via dbus */
    struct gps_data_t*	gpsdata;
    struct gps_fix_t*	gpsfix;
    DBusMessage*	message;
    DBusMessageIter	iter;
    dbus_uint32_t	serial; /* collected, but not used */

    /* if the connection is non existent, return without doing anything */
    if (connection == NULL) return;

    gpsdata = &(channel->gpsdata);
    gpsfix = &(gpsdata->fix);

    message = dbus_message_new_signal(
		    "/org/gpsd",
		    "org.gpsd",
		    "fix");
    dbus_message_iter_init(message, &iter);

    /* add the interesting information to the message */
    dbus_message_iter_append_double(&iter, gpsfix->time);
    dbus_message_iter_append_int32(&iter, gpsfix->mode);
    dbus_message_iter_append_double(&iter, gpsfix->ept);
    dbus_message_iter_append_double(&iter, gpsfix->latitude);
    dbus_message_iter_append_double(&iter, gpsfix->longitude);
    dbus_message_iter_append_double(&iter, gpsfix->eph);
    dbus_message_iter_append_double(&iter, gpsfix->altitude);
    dbus_message_iter_append_double(&iter, gpsfix->epv);
    dbus_message_iter_append_double(&iter, gpsfix->track);
    dbus_message_iter_append_double(&iter, gpsfix->epd);
    dbus_message_iter_append_double(&iter, gpsfix->speed);
    dbus_message_iter_append_double(&iter, gpsfix->eps);
    dbus_message_iter_append_double(&iter, gpsfix->climb);
    dbus_message_iter_append_double(&iter, gpsfix->epc);

    dbus_message_set_no_reply(message, TRUE);

    /* message is complete time to send it */
    dbus_connection_send(connection, message, &serial);
    dbus_message_unref(message);
}

#endif /* DBUS_ENABLE */