/*
 * 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
 */

/*! \file ngap_message_callback.cpp
 \brief
 \author  Keliang DU, BUPT
 \date 2020
 \email: contact@openairinterface.org
 */

#ifndef _NGAP_MESSAGE_CALLBACK_H_
#define _NGAP_MESSAGE_CALLBACK_H_

#include "InitialContextSetupResponse.hpp"
#include "NGReset.hpp"
#include "NGSetupRequest.hpp"
#include "PDUSessionResourceSetupUnsuccessfulTransfer.hpp"
#include "PduSessionResourceReleaseResponse.hpp"
#include "PduSessionResourceSetupResponse.hpp"
#include "amf_app.hpp"
#include "amf_n1.hpp"
#include "amf_n11.hpp"
#include "itti.hpp"
#include "itti_msg_n11.hpp"
#include "itti_msg_n2.hpp"
#include "logger.hpp"
#include "nas_context.hpp"
#include "pdu_session_context.hpp"
#include "sctp_server.hpp"

using namespace sctp;
using namespace ngap;
using namespace amf_application;

extern itti_mw* itti_inst;
extern amf_n1* amf_n1_inst;
extern amf_app* amf_app_inst;

typedef int (*ngap_message_decoded_callback)(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p);

typedef void (*ngap_event_callback)(const sctp_assoc_id_t assoc_id);

//------------------------------------------------------------------------------
int ngap_amf_handle_ng_setup_request(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI NG Setup Request message to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  NGSetupRequestMsg* ngSetupReq = new NGSetupRequestMsg();
  if (!ngSetupReq->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding NGSetupRequest message error");
    return -1;
  }
  // after decoding, need free(message_p)
  itti_ng_setup_request* itti_msg =
      new itti_ng_setup_request(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id   = assoc_id;
  itti_msg->stream     = stream;
  itti_msg->ngSetupReq = ngSetupReq;
  std::shared_ptr<itti_ng_setup_request> i =
      std::shared_ptr<itti_ng_setup_request>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_initial_ue_message(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Initial UE Message to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  // decode INITIAL_UE_MESSAGE
  InitialUEMessageMsg* initUeMsg = new InitialUEMessageMsg();
  if (!initUeMsg->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding InitialUEMessage error");
    return -1;
  }
  itti_initial_ue_message* init_ue_msg =
      new itti_initial_ue_message(TASK_NGAP, TASK_AMF_N2);
  init_ue_msg->assoc_id  = assoc_id;
  init_ue_msg->stream    = stream;
  init_ue_msg->initUeMsg = initUeMsg;
  std::shared_ptr<itti_initial_ue_message> i =
      std::shared_ptr<itti_initial_ue_message>(init_ue_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_uplink_nas_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Uplink NAS Transport message to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  UplinkNASTransportMsg* uplinkNasT = new UplinkNASTransportMsg();
  if (!uplinkNasT->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding UplinkNasTransport message error");
    return -1;
  }
  itti_ul_nas_transport* itti_ul_nas =
      new itti_ul_nas_transport(TASK_NGAP, TASK_AMF_N2);
  itti_ul_nas->assoc_id = assoc_id;
  itti_ul_nas->stream   = stream;
  itti_ul_nas->ulNas    = uplinkNasT;
  std::shared_ptr<itti_ul_nas_transport> i =
      std::shared_ptr<itti_ul_nas_transport>(itti_ul_nas);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_initial_context_setup_response(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Handling Initial Context Setup Response");
  InitialContextSetupResponseMsg* initCtxResp =
      new InitialContextSetupResponseMsg();
  if (!initCtxResp->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding InitialContextSetupResponse message error");
    return -1;
  }
  std::vector<PDUSessionResourceSetupResponseItem_t> list;
  if (!initCtxResp->getPduSessionResourceSetupResponseList(list)) {
    Logger::ngap().debug(
        "Decode PduSessionResourceSetupResponseList IE error or this IE is not "
        "available");
    return 0;
  }

  uint8_t transferIe[500];
  memcpy(
      transferIe, list[0].pduSessionResourceSetupResponseTransfer.buf,
      list[0].pduSessionResourceSetupResponseTransfer.size);
  bstring n2sm = blk2bstr(
      transferIe, list[0].pduSessionResourceSetupResponseTransfer.size);

  Logger::ngap().debug(
      "Sending ITTI Initial Context Setup Response to TASK_AMF_N11");
  itti_nsmf_pdusession_update_sm_context* itti_msg =
      new itti_nsmf_pdusession_update_sm_context(TASK_NGAP, TASK_AMF_N11);
  itti_msg->pdu_session_id = list[0].pduSessionId;
  itti_msg->n2sm           = n2sm;
  itti_msg->is_n2sm_set    = true;
  itti_msg->n2sm_info_type = "PDU_RES_SETUP_RSP";
  itti_msg->amf_ue_ngap_id = initCtxResp->getAmfUeNgapId();
  itti_msg->ran_ue_ngap_id = initCtxResp->getRanUeNgapId();

  std::shared_ptr<itti_nsmf_pdusession_update_sm_context> i =
      std::shared_ptr<itti_nsmf_pdusession_update_sm_context>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N11",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_initial_context_setup_failure(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Initial Context Setup Failure to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_ue_radio_cap_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI UE Radio Capability Indication to TASK_AMF_N2");
  UeRadioCapabilityInfoIndicationMsg* ueRadioCap =
      new UeRadioCapabilityInfoIndicationMsg();
  if (!ueRadioCap->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding UEContextReleaseRequest message error");
    return -1;
  }
  itti_ue_radio_capability_indication* itti_msg =
      new itti_ue_radio_capability_indication(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id   = assoc_id;
  itti_msg->stream     = stream;
  itti_msg->ueRadioCap = ueRadioCap;
  std::shared_ptr<itti_ue_radio_capability_indication> i =
      std::shared_ptr<itti_ue_radio_capability_indication>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_ue_context_release_request(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI UE Context Release Request to TASK_AMF_N2");
  UEContextReleaseRequestMsg* ueCtxRelReq = new UEContextReleaseRequestMsg();
  if (!ueCtxRelReq->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding UEContextReleaseRequest message error");
    return -1;
  }
  itti_ue_context_release_request* itti_msg =
      new itti_ue_context_release_request(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id = assoc_id;
  itti_msg->stream   = stream;
  itti_msg->ueCtxRel = ueCtxRelReq;
  std::shared_ptr<itti_ue_context_release_request> i =
      std::shared_ptr<itti_ue_context_release_request>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_ue_context_release_complete(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI UE Context Release Complete to TASK_AMF_N2");

  UEContextReleaseCompleteMsg* ueCtxRelCmpl = new UEContextReleaseCompleteMsg();
  if (!ueCtxRelCmpl->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding UEContextReleaseComplete message error");
    return -1;
  }
  itti_ue_context_release_complete* itti_msg =
      new itti_ue_context_release_complete(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id     = assoc_id;
  itti_msg->stream       = stream;
  itti_msg->ueCtxRelCmpl = ueCtxRelCmpl;
  std::shared_ptr<itti_ue_context_release_complete> i =
      std::shared_ptr<itti_ue_context_release_complete>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

int ngap_amf_handle_pdu_session_resource_release_response(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Handle PDU Session Resource Setup Release Response");

  PduSessionResourceReleaseResponseMsg* pduresp =
      new PduSessionResourceReleaseResponseMsg();
  if (!pduresp->decodefrompdu(message_p)) {
    Logger::ngap().error(
        "Decoding PduSessionResourceReleaseResponseMsg message error");
    return -1;
  }
  // TODO: process User Location Information if this IE is available

  // Transfer pduSessionResourceReleaseResponseTransfer to SMF
  std::vector<PDUSessionResourceReleasedItem_t> list;
  if (!pduresp->getPduSessionResourceReleasedList(list)) {
    Logger::ngap().error(
        "Decoding PduSessionResourceReleaseResponseMsg "
        "getPduSessionResourceReleasedList IE error");
    return -1;
  }
  // TODO: add the full list
  uint8_t transferIe[500];
  memcpy(
      transferIe, list[0].pduSessionResourceReleaseResponseTransfer.buf,
      list[0].pduSessionResourceReleaseResponseTransfer.size);
  bstring n2sm = blk2bstr(
      transferIe, list[0].pduSessionResourceReleaseResponseTransfer.size);
  Logger::ngap().debug(
      "Sending ITTI PDUSessionResourceReleaseResponse to TASK_AMF_N11");

  itti_nsmf_pdusession_update_sm_context* itti_msg =
      new itti_nsmf_pdusession_update_sm_context(TASK_NGAP, TASK_AMF_N11);
  itti_msg->pdu_session_id = list[0].pduSessionId;
  itti_msg->n2sm           = n2sm;
  itti_msg->is_n2sm_set    = true;
  itti_msg->n2sm_info_type = "PDU_RES_REL_RSP";
  itti_msg->amf_ue_ngap_id = pduresp->getAmfUeNgapId();
  itti_msg->ran_ue_ngap_id = pduresp->getRanUeNgapId();

  std::shared_ptr<itti_nsmf_pdusession_update_sm_context> i =
      std::shared_ptr<itti_nsmf_pdusession_update_sm_context>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N11",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_pdu_session_resource_setup_response(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Handle PDU Session Resource Setup Response");
  PduSessionResourceSetupResponseMsg* pduresp =
      new PduSessionResourceSetupResponseMsg();
  if (!pduresp->decodefrompdu(message_p)) {
    Logger::ngap().error(
        "Decoding PduSessionResourceSetupResponseMsg message error");
    return -1;
  }
  std::vector<PDUSessionResourceSetupResponseItem_t> list;
  if (!pduresp->getPduSessionResourceSetupResponseList(list)) {
    Logger::ngap().error(
        "Decoding PduSessionResourceSetupResponseMsg "
        "getPduSessionResourceSetupResponseList IE error");
    // return -1;
  } else {
    // TODO: for multiple PDU Sessions
    uint8_t transferIe[500];
    memcpy(
        transferIe, list[0].pduSessionResourceSetupResponseTransfer.buf,
        list[0].pduSessionResourceSetupResponseTransfer.size);
    bstring n2sm = blk2bstr(
        transferIe, list[0].pduSessionResourceSetupResponseTransfer.size);
    itti_nsmf_pdusession_update_sm_context* itti_msg =
        new itti_nsmf_pdusession_update_sm_context(TASK_NGAP, TASK_AMF_N11);
    long amf_ue_ngap_id = pduresp->getAmfUeNgapId();
    if (!amf_n1_inst->is_amf_ue_id_2_nas_context(amf_ue_ngap_id)) {
      Logger::ngap().error(
          "No UE NAS context with amf_ue_ngap_id (0x%x)", amf_ue_ngap_id);
      return -1;
    }
    std::shared_ptr<nas_context> nct =
        amf_n1_inst->amf_ue_id_2_nas_context(amf_ue_ngap_id);
    itti_msg->supi           = "imsi-" + nct.get()->imsi;
    itti_msg->pdu_session_id = list[0].pduSessionId;
    itti_msg->n2sm           = n2sm;
    itti_msg->is_n2sm_set    = true;
    itti_msg->n2sm_info_type = "PDU_RES_SETUP_RSP";
    itti_msg->amf_ue_ngap_id = pduresp->getAmfUeNgapId();
    itti_msg->ran_ue_ngap_id = pduresp->getRanUeNgapId();

    std::shared_ptr<itti_nsmf_pdusession_update_sm_context> i =
        std::shared_ptr<itti_nsmf_pdusession_update_sm_context>(itti_msg);
    int ret = itti_inst->send_msg(i);
    if (0 != ret) {
      Logger::ngap().error(
          "Could not send ITTI message %s to task TASK_AMF_N11",
          i->get_msg_name());
    }
    return 0;
  }

  // TTN: Should be removed
  std::vector<PDUSessionResourceFailedToSetupItem_t> list_fail;
  if (!pduresp->getPduSessionResourceFailedToSetupList(list_fail)) {
    Logger::ngap().error(
        "decoding PduSessionResourceSetupResponseMsg "
        "getPduSessionResourceFailedToSetupList IE  error");
  } else {
    PduSessionResourceSetupUnSuccessfulTransferIE* UnSuccessfultransfer =
        new PduSessionResourceSetupUnSuccessfulTransferIE();
    uint8_t buffer[500];
    memcpy(
        buffer, list_fail[0].pduSessionResourceSetupUnsuccessfulTransfer.buf,
        list_fail[0].pduSessionResourceSetupUnsuccessfulTransfer.size);
    UnSuccessfultransfer->decodefromIE(
        buffer, list_fail[0].pduSessionResourceSetupUnsuccessfulTransfer.size);
    Logger::ngap().debug(
        "UnSuccessfultransfer->getChoiceOfCause%d      "
        "UnSuccessfultransfer->getCause%d",
        UnSuccessfultransfer->getChoiceOfCause(),
        UnSuccessfultransfer->getCause());
    if ((UnSuccessfultransfer->getChoiceOfCause() ==
         Ngap_Cause_PR_radioNetwork) &&
        (UnSuccessfultransfer->getCause() ==
         Ngap_CauseRadioNetwork_multiple_PDU_session_ID_instances)) {
      /*Logger::ngap().debug("Sending itti pdu session resource release command
       to TASK_AMF_N2"); itti_pdu_session_resource_release_command * itti_msg =
       new itti_pdu_session_resource_release_command(TASK_NGAP, TASK_AMF_N2);
       itti_msg->amf_ue_ngap_id = pduresp->getAmfUeNgapId();
       itti_msg->ran_ue_ngap_id = pduresp->getRanUeNgapId();
       std::shared_ptr<itti_pdu_session_resource_release_command> i =
       std::shared_ptr<itti_pdu_session_resource_release_command>(itti_msg); int
       ret = itti_inst->send_msg(i); if (0 != ret) { Logger::ngap().error("Could
       not send ITTI message %s to task TASK_AMF_N2", i->get_msg_name());
       }*/
      long amf_ue_ngap_id = pduresp->getAmfUeNgapId();

      if (!amf_n1_inst->is_amf_ue_id_2_nas_context(amf_ue_ngap_id)) {
        Logger::ngap().error(
            "No UE NAS context with amf_ue_ngap_id (0x%x)", amf_ue_ngap_id);
        return -1;
      }

      std::shared_ptr<nas_context> nct =
          amf_n1_inst->amf_ue_id_2_nas_context(amf_ue_ngap_id);
      string supi = "imsi-" + nct.get()->imsi;
      std::shared_ptr<pdu_session_context> psc;
      if (amf_app_inst->find_pdu_session_context(
              supi, list_fail[0].pduSessionId, psc)) {
        if (psc.get() == nullptr) {
          Logger::ngap().error("Cannot get pdu_session_context");
          return -1;
        }
      }
      psc.get()->isn2sm_avaliable = false;
      Logger::ngap().debug(
          "Receive pdu session resource setup response fail (multi pdu session "
          "id),set pdu session context isn2sm_avaliable = false");
      /*Logger::ngap().debug("Sending itti ue context release command to
       TASK_AMF_N2"); itti_ue_context_release_command * itti_msg = new
       itti_ue_context_release_command(TASK_AMF_N1, TASK_AMF_N2);
       itti_msg->amf_ue_ngap_id = pduresp->getAmfUeNgapId();
       itti_msg->ran_ue_ngap_id = pduresp->getRanUeNgapId();
       itti_msg->cause.setChoiceOfCause(Ngap_Cause_PR_radioNetwork);
       itti_msg->cause.setValue(28);
       std::shared_ptr<itti_ue_context_release_command> i =
       std::shared_ptr<itti_ue_context_release_command>(itti_msg); int ret =
       itti_inst->send_msg(i); if (0 != ret) { Logger::ngap().error("Could not
       send ITTI message %s to task TASK_AMF_N2", i->get_msg_name());
       }*/
      return 0;
    }
  }
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_error_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI NGAP Error Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_configuration_update(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI AMF Configuration Update to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int amf_status_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI AMF Status Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int cell_traffic_trace(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Cell Traffic Trace to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int deactivate_trace(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Deactivate Trace to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int downlink_nas_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Downlink NAS Transport to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int downlink_non_UEassociated_nrppa_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Downlink Non UEAssociated NRPPA Transport to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int downlink_ran_configuration_transfer(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Downlink RAN Configuration Transfer to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int downlink_ran_status_transfer(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Downlink RAN Status Transfer to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int downlink_ue_associated_nappa_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Downlink UE Associated NAPPA Transport to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int handover_cancel(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Handover Cancel to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int handover_preparation(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Handover Preparation to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  HandoverRequiredMsg* handover_required = new HandoverRequiredMsg();
  if (!handover_required->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding HandoverRequired message error");
    return -1;
  }
  itti_handover_required* itti_handover_requ =
      new itti_handover_required(TASK_NGAP, TASK_AMF_N2);
  itti_handover_requ->assoc_id    = assoc_id;
  itti_handover_requ->stream      = stream;
  itti_handover_requ->handoverReq = handover_required;
  std::shared_ptr<itti_handover_required> i =
      std::shared_ptr<itti_handover_required>(itti_handover_requ);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int handover_notification(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Handover Notification to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  HandoverNotifyMsg* handoverNotify = new HandoverNotifyMsg();
  if (!handoverNotify->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding HandoverNotify message error");
    return -1;
  }
  itti_handover_notify* itti_handover_NOTIFY =
      new itti_handover_notify(TASK_NGAP, TASK_AMF_N2);
  itti_handover_NOTIFY->assoc_id       = assoc_id;
  itti_handover_NOTIFY->stream         = stream;
  itti_handover_NOTIFY->handovernotify = handoverNotify;
  std::shared_ptr<itti_handover_notify> i =
      std::shared_ptr<itti_handover_notify>(itti_handover_NOTIFY);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int handover_resource_allocation(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Handover Resource Allocation to TASK_AMF_N2");
  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  HandoverRequestAck* handoverRequestAck = new HandoverRequestAck();
  if (!handoverRequestAck->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding Handover Request Acknowledge message error");
    return -1;
  }
  itti_handover_request_Ack* itti_handover_requ_Ack =
      new itti_handover_request_Ack(TASK_NGAP, TASK_AMF_N2);
  itti_handover_requ_Ack->assoc_id           = assoc_id;
  itti_handover_requ_Ack->stream             = stream;
  itti_handover_requ_Ack->handoverrequestAck = handoverRequestAck;
  std::shared_ptr<itti_handover_request_Ack> i =
      std::shared_ptr<itti_handover_request_Ack>(itti_handover_requ_Ack);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int location_reporting_control(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Location Reporting Control to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int location_reporting_failure_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Location Reporting Failure Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int location_report(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Location Report to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int nas_non_delivery_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI NAS Non Delivery Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ng_reset(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI NG Reset to TASK_AMF_N2");

  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  NGResetMsg* ngReset = new NGResetMsg();
  if (!ngReset->decodefrompdu(message_p)) {
    Logger::ngap().error("Decoding NGReset message error");
    return -1;
  }

  itti_ng_reset* itti_msg          = new itti_ng_reset(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id               = assoc_id;
  itti_msg->stream                 = stream;
  itti_msg->ngReset                = ngReset;
  std::shared_ptr<itti_ng_reset> i = std::shared_ptr<itti_ng_reset>(itti_msg);
  int ret                          = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }

  return 0;
}

//------------------------------------------------------------------------------
int overload_start(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Overload Start to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int overload_stop(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Overload Stop to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int paging(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Paging to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ngap_amf_handle_path_switch_request(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Path Switch Request to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pdu_session_resource_modify(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI PDU Session Resource Modify to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pdu_session_resource_modify_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI PDU Session Resource Modify Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pdu_session_resource_notify(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI PDU Session Resource Notify to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int private_message(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Private Message to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pws_cancel(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI PWS Cancel to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pws_failure_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI PWS Failure Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int pws_restart_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI PWS Restart Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ran_configuration_update(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI RAN Configuration Update to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int reroute_nas_request(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Reroute NAS Request to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int rrc_inactive_transition_report(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI RRC Inactive Transition Report to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int trace_failure_indication(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Trace Failure Indication to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int trace_start(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI Trace Start to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ue_context_modification(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI UE Context Modification to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ue_radio_capability_check(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI UE Radio Capability Check to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int ue_tnla_binding_release(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug("Sending ITTI UE TNLA Binding Release to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int uplink_non_ue_associated_nrppa_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Uplink Non UE Associated NRPPA Transport to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int uplink_ran_configuration_transfer(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Uplink RAN Configuration Transfer to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
int uplink_ran_status_transfer(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Uplink RAN Status Transfer to TASK_AMF_N2");

  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, message_p);
  UplinkRANStatusTransfer* Uplinkranstatustransfer =
      new UplinkRANStatusTransfer();
  if (!Uplinkranstatustransfer->defromPDU(message_p)) {
    Logger::ngap().error("Decoding Uplink RAN Status Transfer message error");
    return -1;
  }
  itti_uplink_ran_status_transfer* itti_uplinkran_sta_tran =
      new itti_uplink_ran_status_transfer(TASK_NGAP, TASK_AMF_N2);
  itti_uplinkran_sta_tran->assoc_id          = assoc_id;
  itti_uplinkran_sta_tran->stream            = stream;
  itti_uplinkran_sta_tran->uplinkrantransfer = Uplinkranstatustransfer;
  std::shared_ptr<itti_uplink_ran_status_transfer> i =
      std::shared_ptr<itti_uplink_ran_status_transfer>(itti_uplinkran_sta_tran);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return 0;
}

//------------------------------------------------------------------------------
int uplink_ue_associated_nrppa_transport(
    const sctp_assoc_id_t assoc_id, const sctp_stream_id_t stream,
    struct Ngap_NGAP_PDU* message_p) {
  Logger::ngap().debug(
      "Sending ITTI Uplink UE Associated NRPPA Transport to TASK_AMF_N2");
  return 0;
}

//------------------------------------------------------------------------------
ngap_message_decoded_callback messages_callback[][3] = {
    {ngap_amf_configuration_update, ngap_amf_configuration_update,
     ngap_amf_configuration_update}, /*0 AMFConfigurationUpdate*/
    {amf_status_indication, amf_status_indication,
     amf_status_indication}, /*1 AMFStatusIndication*/
    {cell_traffic_trace, cell_traffic_trace,
     cell_traffic_trace}, /*2 CellTrafficTrace*/
    {deactivate_trace, deactivate_trace,
     deactivate_trace}, /*3 DeactivateTrace*/
    {downlink_nas_transport, downlink_nas_transport,
     downlink_nas_transport}, /*4 DownlinkNASTransport*/
    {downlink_non_UEassociated_nrppa_transport,
     downlink_non_UEassociated_nrppa_transport,
     downlink_non_UEassociated_nrppa_transport}, /*5
                                                    DownlinkNonUEAssociatedNRPPaTransport*/
    {downlink_ran_configuration_transfer, downlink_ran_configuration_transfer,
     downlink_ran_configuration_transfer}, /*6
                                              DownlinkRANConfigurationTransfer*/
    {downlink_ran_status_transfer, downlink_ran_status_transfer,
     downlink_ran_status_transfer}, /*7 DownlinkRANStatusTransfer*/
    {downlink_ue_associated_nappa_transport,
     downlink_ue_associated_nappa_transport,
     downlink_ue_associated_nappa_transport}, /*8
                                                 DownlinkUEAssociatedNRPPaTransport*/
    {ngap_amf_handle_error_indication, 0,
     0},  // 9 {ngap_amf_handle_error_indication,0,0}, /*ErrorIndication*/
    {handover_cancel, handover_cancel, handover_cancel}, /*10 HandoverCancel*/
    {handover_notification, handover_notification,
     handover_notification}, /*11 HandoverNotification*/
    {handover_preparation, handover_preparation,
     handover_preparation}, /*12 HandoverPreparation*/
    {handover_resource_allocation, handover_resource_allocation,
     handover_resource_allocation}, /*13 HandoverResourceAllocation*/
    {0, ngap_amf_handle_initial_context_setup_response,
     ngap_amf_handle_initial_context_setup_failure}, /*InitialContextSetup*/
    {ngap_amf_handle_initial_ue_message, 0,
     0},  // 15 {ngap_amf_handle_initial_ue_message,0,0}, /*InitialUEMessage*/
    {location_reporting_control, location_reporting_control,
     location_reporting_control}, /*16 LocationReportingControl*/
    {location_reporting_failure_indication,
     location_reporting_failure_indication,
     location_reporting_failure_indication},             /*17
                                                            LocationReportingFailureIndication*/
    {location_report, location_report, location_report}, /*18 LocationReport*/
    {nas_non_delivery_indication, nas_non_delivery_indication,
     nas_non_delivery_indication},            /*19 NASNonDeliveryIndication*/
    {ng_reset, ng_reset, ng_reset},           /*20 NGReset*/
    {ngap_amf_handle_ng_setup_request, 0, 0}, /*21 NGSetup*/
    {overload_start, overload_start, overload_start}, /*OverloadStart*/
    {overload_stop, overload_stop, overload_stop},    /*OverloadStop*/
    {paging, paging, paging},                         /*Paging*/
    {ngap_amf_handle_path_switch_request, ngap_amf_handle_path_switch_request,
     ngap_amf_handle_path_switch_request}, /*PathSwitchRequest*/
    {pdu_session_resource_modify, pdu_session_resource_modify,
     pdu_session_resource_modify}, /*PDUSessionResourceModify*/
    {pdu_session_resource_modify_indication,
     pdu_session_resource_modify_indication,
     pdu_session_resource_modify_indication}, /*PDUSessionResourceModifyIndication*/
    {0, ngap_amf_handle_pdu_session_resource_release_response,
     0}, /*PDUSessionResourceRelease*/
    {0, ngap_amf_handle_pdu_session_resource_setup_response,
     0}, /*PDUSessionResourceSetup*/
    {pdu_session_resource_notify, pdu_session_resource_notify,
     pdu_session_resource_notify}, /*PDUSessionResourceNotify*/
    {private_message, private_message, private_message}, /*PrivateMessage*/
    {pws_cancel, pws_cancel, pws_cancel},                /*PWSCancel*/
    {pws_failure_indication, pws_failure_indication,
     pws_failure_indication}, /*PWSFailureIndication*/
    {pws_restart_indication, pws_restart_indication,
     pws_restart_indication}, /*PWSRestartIndication*/
    {ran_configuration_update, ran_configuration_update,
     ran_configuration_update}, /*RANConfigurationUpdate*/
    {reroute_nas_request, reroute_nas_request,
     reroute_nas_request}, /*RerouteNASRequest*/
    {rrc_inactive_transition_report, rrc_inactive_transition_report,
     rrc_inactive_transition_report}, /*RRCInactiveTransitionReport*/
    {trace_failure_indication, trace_failure_indication,
     trace_failure_indication},              /*TraceFailureIndication*/
    {trace_start, trace_start, trace_start}, /*TraceStart*/
    {ue_context_modification, ue_context_modification,
     ue_context_modification}, /*UEContextModification*/
    {0, ngap_amf_handle_ue_context_release_complete, 0}, /*UEContextRelease*/
    {ngap_amf_handle_ue_context_release_request, 0,
     0}, /*UEContextReleaseRequest*/
    {ue_radio_capability_check, ue_radio_capability_check,
     ue_radio_capability_check}, /*UERadioCapabilityCheck*/
    {ngap_amf_handle_ue_radio_cap_indication, 0,
     0}, /*UERadioCapabilityInfoIndication*/
    {ue_tnla_binding_release, ue_tnla_binding_release,
     ue_tnla_binding_release}, /*UETNLABindingRelease*/
    {ngap_amf_handle_uplink_nas_transport, 0,
     0},  //{ngap_amf_handle_uplink_nas_transport,0,0}, /*UplinkNASTransport*/
    {uplink_non_ue_associated_nrppa_transport,
     uplink_non_ue_associated_nrppa_transport,
     uplink_non_ue_associated_nrppa_transport}, /*UplinkNonUEAssociatedNRPPaTransport*/
    {uplink_ran_configuration_transfer, uplink_ran_configuration_transfer,
     uplink_ran_configuration_transfer}, /*UplinkRANConfigurationTransfer*/
    {uplink_ran_status_transfer, uplink_ran_status_transfer,
     uplink_ran_status_transfer}, /*UplinkRANStatusTransfer*/
    {uplink_ue_associated_nrppa_transport, uplink_ue_associated_nrppa_transport,
     uplink_ue_associated_nrppa_transport}, /*UplinkUEAssociatedNRPPaTransport*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0},                              /*WriteReplaceWarning*/
    {0, 0, 0}                               /*WriteReplaceWarning*/

};

//------------------------------------------------------------------------------
void ngap_sctp_shutdown(const sctp_assoc_id_t assoc_id) {
  Logger::ngap().debug("Sending ITTI SCTP Shutdown event to TASK_AMF_N2");

  itti_ng_shutdown* itti_msg = new itti_ng_shutdown(TASK_NGAP, TASK_AMF_N2);
  itti_msg->assoc_id         = assoc_id;
  std::shared_ptr<itti_ng_shutdown> i =
      std::shared_ptr<itti_ng_shutdown>(itti_msg);
  int ret = itti_inst->send_msg(i);
  if (0 != ret) {
    Logger::ngap().error(
        "Could not send ITTI message %s to task TASK_AMF_N2",
        i->get_msg_name());
  }
  return;
}

//------------------------------------------------------------------------------
ngap_event_callback events_callback[][1] = {
    {ngap_sctp_shutdown},
    {0} /*reserved*/
};

#endif
