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

int decode_pdu_session_establishment_request(
    pdu_session_establishment_request_msg *pdu_session_establishment_request,
    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_ESTABLISHMENT_REQUEST_MINIMUM_LENGTH, len);

  if ((decoded_result = decode_intergrity_protection_maximum_data_rate(
      &pdu_session_establishment_request->intergrityprotectionmaximumdatarate,
      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 & 0xf0) {
      case PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_IEI:
        if ((decoded_result = decode__pdu_session_type(
            &pdu_session_establishment_request->_pdusessiontype,
            PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_IEI,
            buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_PRESENT;
        }
        break;
      case PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_IEI:
        if ((decoded_result = decode_ssc_mode(
            &pdu_session_establishment_request->sscmode,
            PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_IEI, buffer + decoded,
            len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_PRESENT;
        }
        break;

      case PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_IEI:
        if ((decoded_result =
            decode_alwayson_pdu_session_requested(
                &pdu_session_establishment_request->alwaysonpdusessionrequested,
                PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_IEI,
                buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_PRESENT;
        }
        break;
    }

    switch (ieiDecoded) {
      case PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_IEI:
        if ((decoded_result = decode__5gsm_capability(
            &pdu_session_establishment_request->_5gsmcapability,
            PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_IEI,
            buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_PRESENT;
        }
        break;
      case PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_IEI:
        if ((decoded_result = decode_maximum_number_of_supported_packet_filters(
            &pdu_session_establishment_request
                ->maximumnumberofsupportedpacketfilters,
            PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_IEI,
            buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_PRESENT;
        }
        break;
      case PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_IEI:
        if ((decoded_result =
            decode_smpdudn_request_container(
                &pdu_session_establishment_request->smpdudnrequestcontainer,
                PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_IEI,
                buffer + decoded, len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_PRESENT;
        }
        break;
      case PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_IEI:
        if ((decoded_result = decode_extended_protocol_configuration_options(
            &pdu_session_establishment_request
                ->extendedprotocolconfigurationoptions,
            PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_IEI, buffer + decoded,
            len - decoded)) < 0)
          return decoded_result;
        else {
          decoded += decoded_result;
          pdu_session_establishment_request->presence |=
              PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_PRESENT;
        }
        break;
    }
  }

  return decoded;
}

int encode_pdu_session_establishment_request(
    pdu_session_establishment_request_msg *pdu_session_establishment_request,
    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_ESTABLISHMENT_REQUEST_MINIMUM_LENGTH, len);

  if ((encoded_result = encode_intergrity_protection_maximum_data_rate(
      pdu_session_establishment_request->intergrityprotectionmaximumdatarate, 0,
      buffer + encoded, len - encoded)) < 0) {
    return encoded_result;
  } else {
    encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_PRESENT) {
    if ((encoded_result = encode__pdu_session_type(
        pdu_session_establishment_request->_pdusessiontype,
        PDU_SESSION_ESTABLISHMENT_REQUEST_PDU_SESSION_TYPE_IEI,
        buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_PRESENT) {
    if ((encoded_result = encode_ssc_mode(
        pdu_session_establishment_request->sscmode,
        PDU_SESSION_ESTABLISHMENT_REQUEST_SSC_MODE_IEI, buffer + encoded,
        len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_PRESENT) {

    if ((encoded_result = encode__5gsm_capability(
        pdu_session_establishment_request->_5gsmcapability,
        PDU_SESSION_ESTABLISHMENT_REQUEST__5GSM_CAPABILITY_IEI,
        buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_PRESENT) {
    if ((encoded_result =
        encode_maximum_number_of_supported_packet_filters(
            pdu_session_establishment_request
                ->maximumnumberofsupportedpacketfilters,
            PDU_SESSION_ESTABLISHMENT_REQUEST_MAXIMUM_NUMBER_OF_SUPPORTED_IEI,
            buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_PRESENT) {
    if ((encoded_result = encode_alwayson_pdu_session_requested(
        pdu_session_establishment_request->alwaysonpdusessionrequested,
        PDU_SESSION_ESTABLISHMENT_REQUEST_ALWAYSON_PDU_SESSION_REQUESTED_IEI,
        buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_PRESENT) {
    if ((encoded_result =
        encode_smpdudn_request_container(
            pdu_session_establishment_request->smpdudnrequestcontainer,
            PDU_SESSION_ESTABLISHMENT_REQUEST_SMPDUDN_REQUEST_CONTAINER_INFORMATION_IEI,
            buffer + encoded, len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  if ((pdu_session_establishment_request->presence
      & PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_PRESENT)
      == PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_PRESENT) {
    if ((encoded_result = encode_extended_protocol_configuration_options(
        pdu_session_establishment_request->extendedprotocolconfigurationoptions,
        PDU_SESSION_ESTABLISHMENT_REQUEST_EPCO_IEI, buffer + encoded,
        len - encoded)) < 0)
      return encoded_result;
    else
      encoded += encoded_result;
  }

  return encoded;
}
