/**
 * Copyright 2013-2021 Software Radio Systems Limited
 *
 * This file is part of srsLTE.
 *
 * srsLTE 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.
 *
 * srsLTE 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 SRSLTE_MAC_PCAP_H
#define SRSLTE_MAC_PCAP_H

#include "srslte/common/block_queue.h"
#include "srslte/common/buffer_pool.h"
#include "srslte/common/common.h"
#include "srslte/common/pcap.h"
#include "srslte/common/threads.h"
#include "srslte/srslog/srslog.h"
#include <mutex>
#include <stdint.h>
#include <thread>

namespace srslte {
class mac_pcap : srslte::thread
{
public:
  mac_pcap(srslte_rat_t rat);
  ~mac_pcap();
  void     enable(bool enable);
  uint32_t open(std::string filename, uint32_t ue_id = 0);
  uint32_t close();

  void set_ue_id(uint16_t ue_id);

  // EUTRA
  void
       write_ul_crnti(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t crnti, uint32_t reTX, uint32_t tti, uint8_t cc_idx);
  void write_dl_crnti(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t crnti, bool crc_ok, uint32_t tti, uint8_t cc_idx);
  void write_dl_ranti(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t ranti, bool crc_ok, uint32_t tti, uint8_t cc_idx);

  // SI and BCH only for DL
  void write_dl_sirnti(uint8_t* pdu, uint32_t pdu_len_bytes, bool crc_ok, uint32_t tti, uint8_t cc_idx);
  void write_dl_bch(uint8_t* pdu, uint32_t pdu_len_bytes, bool crc_ok, uint32_t tti, uint8_t cc_idx);
  void write_dl_pch(uint8_t* pdu, uint32_t pdu_len_bytes, bool crc_ok, uint32_t tti, uint8_t cc_idx);
  void write_dl_mch(uint8_t* pdu, uint32_t pdu_len_bytes, bool crc_ok, uint32_t tti, uint8_t cc_idx);

  void write_ul_rrc_pdu(const uint8_t* input, const int32_t input_len);

  // Sidelink
  void write_sl_crnti(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint32_t reTX, uint32_t tti, uint8_t cc_idx);

  // NR
  void write_dl_crnti_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t crnti, uint8_t harqid, uint32_t tti);
  void write_ul_crnti_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint8_t harqid, uint32_t tti);
  void write_dl_ra_rnti_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint8_t harqid, uint32_t tti);
  void write_dl_bch_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint8_t harqid, uint32_t tti);
  void write_dl_pch_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint8_t harqid, uint32_t tti);
  void write_dl_si_rnti_nr(uint8_t* pdu, uint32_t pdu_len_bytes, uint16_t rnti, uint8_t harqid, uint32_t tti);

private:
  srslog::basic_logger& logger;
  bool                  running = false;
  srslte_rat_t          rat     = srslte_rat_t::nulltype;
  uint32_t              dlt     = 0; // The DLT used for the PCAP file
  std::string           filename;
  FILE*                 pcap_file = nullptr;
  uint32_t              ue_id     = 0;
  void                  pack_and_queue(uint8_t* payload,
                                       uint32_t payload_len,
                                       uint32_t reTX,
                                       bool     crc_ok,
                                       uint8_t  cc_idx,
                                       uint32_t tti,
                                       uint16_t crnti_,
                                       uint8_t  direction,
                                       uint8_t  rnti_type);
  void                  pack_and_queue_nr(uint8_t* payload,
                                          uint32_t payload_len,
                                          uint32_t tti,
                                          uint16_t crnti,
                                          uint8_t  harqid,
                                          uint8_t  direction,
                                          uint8_t  rnti_type);

  typedef struct {
    // Different PCAP context for both RATs
    MAC_Context_Info_t    context;
    mac_nr_context_info_t context_nr;
    unique_byte_buffer_t  pdu;
  } pcap_pdu_t;
  block_queue<pcap_pdu_t> queue;
  std::mutex              mutex;

  void write_pdu(pcap_pdu_t& pdu);
  void run_thread() final;
};

} // namespace srslte

#endif // SRSLTE_MAC_PCAP_H