/*
 * Copyright (c) 2015, SICS Swedish ICT.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
/**
 * \file
 *         A RPL node able to act as either DAG Root (6dr) or simple node (6ln).
 *         Press use button at startup to configure.
 *
 * \author Simon Duquennoy <simonduq@sics.se>
 */

#include "contiki.h"
#include "net/rpl/rpl.h"
#include "tools/rpl-tools.h"

#define DEBUG DEBUG_PRINT
#include "net/ip/uip-debug.h"

#define CONFIG_VIA_BUTTON PLATFORM_HAS_BUTTON
#if CONFIG_VIA_BUTTON
#include "button-sensor.h"
#endif /* CONFIG_VIA_BUTTON */

/*---------------------------------------------------------------------------*/
PROCESS(node_process, "RPL Node");
#if CONFIG_VIA_BUTTON
AUTOSTART_PROCESSES(&node_process, &sensors_process);
#else /* CONFIG_VIA_BUTTON */
AUTOSTART_PROCESSES(&node_process);
#endif /* CONFIG_VIA_BUTTON */

/*---------------------------------------------------------------------------*/
PROCESS_THREAD(node_process, ev, data)
{
  PROCESS_BEGIN();

  /* 3 possible roles:
   * - role_6ln: simple node, will join any network, secured or not
   * - role_6dg: DAG root, will advertise (unsecured) beacons
   * */
  static int is_coordinator = 0;
  static enum { role_6ln, role_6dr } node_role;
  node_role = role_6ln;

#if CONFIG_VIA_BUTTON
  {
#define CONFIG_WAIT_TIME 10
    static struct etimer et;

    SENSORS_ACTIVATE(button_sensor);
    etimer_set(&et, CLOCK_SECOND * CONFIG_WAIT_TIME);

    while(!etimer_expired(&et)) {
      printf("Init: current role: %s. Will start in %u seconds.\n",
             node_role == role_6ln ? "6ln" : "6dr",
             CONFIG_WAIT_TIME);
      PROCESS_WAIT_EVENT_UNTIL(((ev == sensors_event) &&
                                (data == &button_sensor) && button_sensor.value(0) > 0)
                               || etimer_expired(&et));
      if(ev == sensors_event && data == &button_sensor && button_sensor.value(0) > 0) {
        node_role = (node_role + 1) % 2;
        etimer_restart(&et);
      }
    }
  }

#endif /* CONFIG_VIA_BUTTON */

  printf("Init: node starting with role %s\n",
         node_role == role_6ln ? "6ln" : "6dr");

  is_coordinator = node_role > role_6ln;

  if(is_coordinator) {
    uip_ipaddr_t prefix;
    uip_ip6addr(&prefix, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
    rpl_tools_init(&prefix);
  } else {
    rpl_tools_init(NULL);
  } PROCESS_END();
}
/*---------------------------------------------------------------------------*/