/**
 * Copyright 2013-2021 Software Radio Systems Limited
 *
 * This file is part of srsRAN.
 *
 * srsRAN is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsRAN is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * A copy of the GNU Affero General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */

#ifndef SRSRAN_GNB_NGAP_INTERFACES_H
#define SRSRAN_GNB_NGAP_INTERFACES_H

#include "srsran/asn1/ngap_utils.h"

namespace srsenb {

struct ngap_args_t {
  uint32_t    gnb_id;  // 20-bit id (lsb bits)
  uint8_t     cell_id; // 8-bit cell id
  uint16_t    tac;     // 16-bit tac
  uint16_t    mcc;     // BCD-coded with 0xF filler
  uint16_t    mnc;     // BCD-coded with 0xF filler
  std::string amf_addr;
  std::string gtp_bind_addr;
  std::string gtp_advertise_addr;
  std::string ngc_bind_addr;
  std::string gnb_name;
};

// NGAP interface for RRC
class ngap_interface_rrc_nr
{
public:
  virtual void initial_ue(uint16_t                                rnti,
                          uint32_t                                gnb_cc_idx,
                          asn1::ngap_nr::rrcestablishment_cause_e cause,
                          srsran::unique_byte_buffer_t            pdu) = 0;
  virtual void initial_ue(uint16_t                                rnti,
                          uint32_t                                gnb_cc_idx,
                          asn1::ngap_nr::rrcestablishment_cause_e cause,
                          srsran::unique_byte_buffer_t            pdu,
                          uint32_t                                m_tmsi,
                          uint8_t                                 mmec)                     = 0;

  virtual void write_pdu(uint16_t rnti, srsran::unique_byte_buffer_t pdu)                    = 0;
  virtual bool user_exists(uint16_t rnti)                                                    = 0;
  virtual void user_mod(uint16_t old_rnti, uint16_t new_rnti)                                = 0;
  virtual bool user_release(uint16_t rnti, asn1::ngap_nr::cause_radio_network_e cause_radio) = 0;
  virtual bool is_amf_connected()                                                            = 0;

  /// TS 36.413, 8.3.1 - Initial Context Setup
  virtual void ue_ctxt_setup_complete(uint16_t rnti) = 0;
};

} // namespace srsenb

#endif // SRSRAN_GNB_NGAP_INTERFACES_H