#include "sn.h"

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*******************************************************************************
 *                                   EXTERN                                    *
 *******************************************************************************/

static sn_t m_sn;

sn_t* xs_device_info_get() {  //
  sn_t* info = (sn_t*)DEVICE_INFO_START_ADD;
  m_sn       = *info;

  if (m_sn.year == 255) {
    m_sn.year = 0;
  }

  if (m_sn.weak == 255) {
    m_sn.weak = 0;
  }

  if (m_sn.index == 65535) {
    m_sn.index = 0;
  }

  return &m_sn;
}

const char* sn_get_str() {
  sn_t*       info = xs_device_info_get();
  static char sn_str[32];

  sprintf(sn_str, "%s%02d%02d%04d", "SN", info->year, info->weak, info->index);
  return sn_str;
}