/*
 *
 *  GattLib - GATT Library
 *
 *  Copyright (C) 2016-2017  Olivier Martin <olivier@labapart.org>
 *
 *
 *  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
 *
 */

#include <assert.h>
#include <glib.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>

#include "gattlib.h"

// Battery Level UUID
const uuid_t g_battery_level_uuid = CREATE_UUID16(0x2A19);

static GMainLoop *m_main_loop;

void notification_handler(const uuid_t* uuid, const uint8_t* data, size_t data_length, void* user_data) {
	int i;

	printf("Notification Handler: ");

	for (i = 0; i < data_length; i++) {
		printf("%02x ", data[i]);
	}
	printf("\n");
}

static void on_user_abort(int arg) {
	g_main_loop_quit(m_main_loop);
}

static void usage(char *argv[]) {
	printf("%s <device_address>\n", argv[0]);
}

int main(int argc, char *argv[]) {
	int ret;
	gatt_connection_t* connection;

	if (argc != 2) {
		usage(argv);
		return 1;
	}

	connection = gattlib_connect(NULL, argv[1], GATTLIB_CONNECTION_OPTIONS_LEGACY_DEFAULT);
	if (connection == NULL) {
		fprintf(stderr, "Fail to connect to the bluetooth device.\n");
		return 1;
	}

	gattlib_register_notification(connection, notification_handler, NULL);

	ret = gattlib_notification_start(connection, &g_battery_level_uuid);
	if (ret) {
		fprintf(stderr, "Fail to start notification.\n");
		goto DISCONNECT;
	}

	// Catch CTRL-C
	signal(SIGINT, on_user_abort);

	m_main_loop = g_main_loop_new(NULL, 0);
	g_main_loop_run(m_main_loop);

	// In case we quit the main loop, clean the connection
	gattlib_notification_stop(connection, &g_battery_level_uuid);
	g_main_loop_unref(m_main_loop);

DISCONNECT:
	gattlib_disconnect(connection);
	puts("Done");
	return ret;
}