#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "TLVEncoder.h"
#include "TLVDecoder.h"
#include "PDUSessionReleaseCommand.h"

int decode_pdu_session_release_command(
    pdu_session_release_command_msg *pdu_session_release_command,
    uint8_t *buffer, uint32_t len) {
  uint32_t decoded = 0;
  int decoded_result = 0;

  // Check if we got a NULL pointer and if buffer length is >= minimum length expected for the message.
  CHECK_PDU_POINTER_AND_LENGTH_DECODER(
      buffer, PDU_SESSION_RELEASE_COMMAND_MINIMUM_LENGTH, len);

  if ((decoded_result = decode__5gsm_cause(
      &pdu_session_release_command->_5gsmcause, 0, buffer + decoded,
      len - decoded)) < 0) {
    return decoded_result;
  } else {
    decoded += decoded_result;
  }

  while (len - decoded > 0) {
    uint8_t ieiDecoded = *(buffer + decoded);

    if (ieiDecoded == 0)
      break;

    switch (ieiDecoded) {
      case PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_IEI:
        if ((decoded_result = decode_gprs_timer3(
            &pdu_session_release_command->gprstimer3,
            PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_IEI, buffer + decoded,
            len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_release_command->presence |=
              PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_PRESENCE;
        }
        break;
      case PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_IEI:
        if ((decoded_result = decode_eap_message(
            &pdu_session_release_command->eapmessage,
            PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_IEI, buffer + decoded,
            len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_release_command->presence |=
              PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_PRESENCE;
        }
        break;
      case PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_IEI:
        if ((decoded_result =
            decode__5gsm_congestion_reattempt_indicator(
                &pdu_session_release_command->_5gsmcongestionreattemptindicator,
                PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_IEI,
                buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_release_command->presence |=
              PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_PRESENCE;
        }
        break;
      case PDU_SESSION_RELEASE_COMMAND_E_P_C_O_IEI:
        if ((decoded_result = decode_extended_protocol_configuration_options(
            &pdu_session_release_command->extendedprotocolconfigurationoptions,
            PDU_SESSION_RELEASE_COMMAND_E_P_C_O_IEI, buffer + decoded,
            len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_release_command->presence |=
              PDU_SESSION_RELEASE_COMMAND_E_P_C_O_PRESENCE;
        }
        break;
    }
  }

  return decoded;
}

int encode_pdu_session_release_command(
    pdu_session_release_command_msg *pdu_session_release_command,
    uint8_t *buffer, uint32_t len) {
  uint32_t encoded = 0;
  int encoded_result = 0;

  // Check if we got a NULL pointer and if buffer length is >= minimum length expected for the message.
  CHECK_PDU_POINTER_AND_LENGTH_ENCODER(
      buffer, PDU_SESSION_RELEASE_COMMAND_MINIMUM_LENGTH, len);

  if ((encoded_result = encode__5gsm_cause(
      pdu_session_release_command->_5gsmcause, 0, buffer + encoded,
      len - encoded)) < 0) {
    return encoded_result;
  } else {
    encoded += encoded_result;
  }

  if ((pdu_session_release_command->presence
      & PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_PRESENCE)
      == PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_PRESENCE) {
    if ((encoded_result = encode_gprs_timer3(
        pdu_session_release_command->gprstimer3,
        PDU_SESSION_RELEASE_COMMAND_GPRS_TIMER3_IEI, buffer + encoded,
        len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_release_command->presence
      & PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_PRESENCE)
      == PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_PRESENCE) {
    if ((encoded_result = encode_eap_message(
        pdu_session_release_command->eapmessage,
        PDU_SESSION_RELEASE_COMMAND_EAP_MESSAGE_IEI, buffer + encoded,
        len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_release_command->presence
      & PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_PRESENCE)
      == PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_PRESENCE) {
    if ((encoded_result = encode__5gsm_congestion_reattempt_indicator(
        pdu_session_release_command->_5gsmcongestionreattemptindicator,
        PDU_SESSION_RELEASE_COMMAND__5GSM_CONGESTION_REATTEMPT_INDICATOR_IEI,
        buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_release_command->presence
      & PDU_SESSION_RELEASE_COMMAND_E_P_C_O_PRESENCE)
      == PDU_SESSION_RELEASE_COMMAND_E_P_C_O_PRESENCE) {
    if ((encoded_result = encode_extended_protocol_configuration_options(
        pdu_session_release_command->extendedprotocolconfigurationoptions,
        PDU_SESSION_RELEASE_COMMAND_E_P_C_O_IEI, buffer + encoded,
        len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  return encoded;
}
