/*****************************************************************************
#                                                                            *
# Copyright 2019 AT&T Intellectual Property                                  *
# Copyright 2019 Nokia                                                       *
#                                                                            *
# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0                            *
#                                                                            *
# 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.                                             *
#                                                                            *
******************************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <assert.h>

#include "e2sim_sctp.hpp"
#include "e2ap_message_handler.hpp"

#include "encode_e2apv1.hpp"
#include "encode_kpm.hpp"

extern "C" {
  #include "e2sim_defs.h"
  #include "E2AP-PDU.h"
  #include "e2ap_asn1c_codec.h"
  #include "GlobalE2node-ID.h"
  #include "GlobalE2node-gNB-ID.h"
  #include "GlobalgNB-ID.h"
  #include "OCTET_STRING.h"
  #include "asn_application.h"
  #include "GNB-ID-Choice.h"
  #include "ProtocolIE-Field.h"
  #include "E2setupRequest.h"
  #include "RICaction-ToBeSetup-Item.h"
  #include "RICactions-ToBeSetup-List.h"
  #include "RICeventTriggerDefinition.h"
  #include "RICsubscriptionRequest.h"
  #include "ProtocolIE-SingleContainer.h"
  #include "RANfunctions-List.h"
  #include "RICindication.h"
  #include "RICsubsequentActionType.h"
  #include "RICsubsequentAction.h"  
  #include "RICtimeToWait.h"
}

using namespace std;

/*
struct {
  type **array;
  int count;
  int size;
  void (*free)(decltype(*array));
} 
*/

void encode_and_send_sctp_data(E2AP_PDU_t* pdu, int client_fd)
{
  uint8_t       *buf;
  sctp_buffer_t data;

  data.len = e2ap_asn1c_encode_pdu(pdu, &buf);
  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));

  sctp_send_data(client_fd, data);
}

void wait_for_sctp_data(int client_fd)
{
  sctp_buffer_t recv_buf;
  if(sctp_receive_data(client_fd, recv_buf) > 0)
  {
    LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
    e2ap_handle_sctp_data(client_fd, recv_buf, false);
  }
}



int main(int argc, char* argv[]){
  LOG_I("Start RIC Simulator");

  bool xmlenc = true;

  options_t ops = read_input_options(argc, argv);

  int server_fd = sctp_start_server(ops.server_ip, ops.server_port);
  int client_fd = sctp_accept_connection(ops.server_ip, server_fd);

  sctp_buffer_t recv_buf;

  LOG_I("[SCTP] Waiting for SCTP data");

  while(1) //constantly looking for data on SCTP interface    
  {
    LOG_I("in while loop");
    if(sctp_receive_data(client_fd, recv_buf) <= 0)
      break;

    LOG_I("[SCTP] Received new data of size %d", recv_buf.len);

    e2ap_handle_sctp_data(client_fd, recv_buf, xmlenc);

    if (xmlenc)
      xmlenc = false;
  }

  return 0;  

}