/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>


#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "EmergencyNumberList.h"

int decode_emergency_number_list(EmergencyNumberList *emergencynumberlist, uint8_t iei, uint8_t *buffer, uint32_t len)
{
  int decoded = 0;
  uint8_t ielen = 0;

  if (iei > 0) {
    CHECK_IEI_DECODER(iei, *buffer);
    decoded++;
  }

  ielen = *(buffer + decoded);
  decoded++;
  CHECK_LENGTH_DECODER(len - decoded, ielen);
  int information_element_index = 0;
  while ((decoded < ielen) && (information_element_index < EMERGENCY_NUMBER_LIST_MAX_NUMBER_INFORMATION)) {
    emergencynumberlist->emergency_number_information[information_element_index].lengthofemergency = *(buffer + decoded);
    decoded++;
    emergencynumberlist->emergency_number_information[information_element_index].emergencyservicecategoryvalue = *(buffer + decoded) & 0x1f;
    decoded++;
    int remaining_len = emergencynumberlist->emergency_number_information[information_element_index].lengthofemergency - 1;
    int digit_index = 0;
    while (remaining_len > 0) {
    	emergencynumberlist->emergency_number_information[information_element_index].bcd_digits[digit_index++] = *(buffer + decoded);
        decoded++;
        remaining_len --;
    }
    while (digit_index < EMERGENCY_NUMBER_LIST_MAX_2DIGITS) {
    	emergencynumberlist->emergency_number_information[information_element_index].bcd_digits[digit_index++] = 0xFF;
    }
    information_element_index++;
  }
#if defined (NAS_DEBUG)
  dump_emergency_number_list_xml(emergencynumberlist, iei);
#endif
  return decoded;
}
int encode_emergency_number_list(EmergencyNumberList *emergencynumberlist, uint8_t iei, uint8_t *buffer, uint32_t len)
{
  uint8_t *lenPtr;
  uint32_t encoded = 0;
  /* Checking IEI and pointer */
  CHECK_PDU_POINTER_AND_LENGTH_ENCODER(buffer, EMERGENCY_NUMBER_LIST_MINIMUM_LENGTH, len);
#if defined (NAS_DEBUG)
  dump_emergency_number_list_xml(emergencynumberlist, iei);
#endif

  if (iei > 0) {
    *buffer = iei;
    encoded++;
  }

  lenPtr  = (buffer + encoded);
  encoded ++;
  for (  int ie_index = 0; ie_index < emergencynumberlist->num_emergency_elements; ie_index++) {
	  *(buffer + encoded) = emergencynumberlist->emergency_number_information[ie_index].lengthofemergency;
	  encoded++;
	  *(buffer + encoded) = 0x00 |
	                        (emergencynumberlist->emergency_number_information[ie_index].emergencyservicecategoryvalue & 0x1f);
	  encoded++;
	  for (int bcd2_index = 0; bcd2_index < (emergencynumberlist->emergency_number_information[ie_index].lengthofemergency - 1); bcd2_index++) {
		  *(buffer + encoded) = emergencynumberlist->emergency_number_information[ie_index].bcd_digits[bcd2_index];
	  }
  }
  *lenPtr = encoded - 1 - ((iei > 0) ? 1 : 0);
  return encoded;
}

void dump_emergency_number_list_xml(EmergencyNumberList *emergencynumberlist, uint8_t iei)
{
  printf("<Emergency Number List>\n");

  if (iei > 0)
    /* Don't display IEI if = 0 */
    printf("    <IEI>0x%X</IEI>\n", iei);
  for (  int ie_index = 0; ie_index < emergencynumberlist->num_emergency_elements; ie_index++) {
	  printf("    <Length of emergency>%u</Length of emergency>\n", emergencynumberlist->emergency_number_information[ie_index].lengthofemergency);
	  printf("    <Emergency service category value>%u</Emergency service category value>\n", emergencynumberlist->emergency_number_information[ie_index].emergencyservicecategoryvalue);
	  for (int bcd2_index = 0; bcd2_index < (emergencynumberlist->emergency_number_information[ie_index].lengthofemergency - 1); bcd2_index++) {
		  uint8_t bcd1 = emergencynumberlist->emergency_number_information[ie_index].bcd_digits[bcd2_index] & 0x0f;
		  uint8_t bcd2 = (emergencynumberlist->emergency_number_information[ie_index].bcd_digits[bcd2_index] & 0xf0) >> 4;
		  if (bcd1 < 10) {
		    printf("    <BCD Digit%u>%u</BCD Digit%u>\n", (bcd2_index*2)+1, bcd1, (bcd2_index*2)+1);
		    if (bcd2 < 10) {
		    	printf("    <BCD Digit%u>%u</BCD Digit%u>\n", (bcd2_index*2)+2, bcd2, (bcd2_index*2)+2);
		    }
		  }
	  }
  }
  printf("</Emergency Number List>\n");
}