/*
 * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
 * Copyright (c) 2015, Nordic Semiconductor
 *
 * 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.
 *
 * This file is part of the Contiki operating system.
 */

/**
 * \addtogroup nrf52dk-examples Demo projects for nRF52 DK
 * @{
 *
 * \defgroup nrf52dk-coap-demo CoAP demo for nRF52dk
 * @{
 *
 * \file
 *      Erbium (Er) REST Engine example.
 * \author
 *      Matthias Kovatsch <kovatsch@inf.ethz.ch>
 * \author
 *      Wojciech Bober <wojciech.bober@nordicsemi.no>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "contiki.h"
#include "contiki-net.h"
#include "rest-engine.h"
#include "uip.h"
#include "dev/button-sensor.h"
#include "dev/leds.h"

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

/*
 * Resources to be activated need to be imported through the extern keyword.
 * The build system automatically compiles the resources in the corresponding sub-directory.
 */
extern resource_t res_led3;

static void
print_local_addresses(void)
{
  int i;
  uint8_t state;

  PRINTF("Server IPv6 addresses:\n");
  for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
    state = uip_ds6_if.addr_list[i].state;
    if(uip_ds6_if.addr_list[i].isused && (state == ADDR_TENTATIVE || state
                                          == ADDR_PREFERRED)) {
      PRINTF("  ");
      PRINT6ADDR(&uip_ds6_if.addr_list[i].ipaddr);
      PRINTF("\n");
      if(state == ADDR_TENTATIVE) {
        uip_ds6_if.addr_list[i].state = ADDR_PREFERRED;
      }
    }
  }
}

PROCESS(er_example_server, "nRF52 DK Coap Server");
AUTOSTART_PROCESSES(&er_example_server);

PROCESS_THREAD(er_example_server, ev, data)
{
  PROCESS_BEGIN();
  PROCESS_PAUSE();

  PRINTF("Starting Erbium Example Server\n");

  PRINTF("uIP buffer: %u\n", UIP_BUFSIZE);
  PRINTF("LL header: %u\n", UIP_LLH_LEN);
  PRINTF("IP+UDP header: %u\n", UIP_IPUDPH_LEN);
  PRINTF("REST max chunk: %u\n", REST_MAX_CHUNK_SIZE);

  print_local_addresses();

  /* Initialize the REST engine. */
  rest_init_engine();
  rest_activate_resource(&res_led3, "lights/led3");

  SENSORS_ACTIVATE(button_1);

  /* Define application-specific events here. */
  while (1) {
    PROCESS_WAIT_EVENT();

    if (ev == sensors_event) {
      if (data == &button_1 && button_1.value(BUTTON_SENSOR_VALUE_STATE) == 0) {
        leds_toggle(LEDS_3);
        res_led3.trigger();
      }
    }
  }

  PROCESS_END();
}

/**
 * @}
 * @}
 */