/**
 * Copyright 2013-2022 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_RLC_TEST_COMMON_H
#define SRSRAN_RLC_TEST_COMMON_H

#include "srsran/common/byte_buffer.h"
#include "srsran/common/rlc_pcap.h"
#include "srsran/interfaces/ue_pdcp_interfaces.h"
#include "srsran/interfaces/ue_rrc_interfaces.h"
#include "srsran/rlc/rlc_metrics.h"
#include <vector>

namespace srsran {

class rlc_um_tester : public srsue::pdcp_interface_rlc, public srsue::rrc_interface_rlc
{
public:
  rlc_um_tester() = default;

  // PDCP interface
  void write_pdu(uint32_t lcid, unique_byte_buffer_t sdu) final
  {
    // check length
    if (lcid != 3 && sdu->N_bytes != expected_sdu_len) {
      printf("Received PDU with size %d, expected %d. Exiting.\n", sdu->N_bytes, expected_sdu_len);
      exit(-1);
    }

    // check content
    uint8_t first_byte = *sdu->msg;
    for (uint32_t i = 0; i < sdu->N_bytes; i++) {
      if (sdu->msg[i] != first_byte) {
        printf("Received corrupted SDU with size %d. Exiting.\n", sdu->N_bytes);
        srsran_vec_fprint_byte(stdout, sdu->msg, sdu->N_bytes);
        exit(-1);
      }
    }

    // srsran_vec_fprint_byte(stdout, sdu->msg, sdu->N_bytes);
    sdus.push_back(std::move(sdu));
  }
  void write_pdu_bcch_bch(unique_byte_buffer_t sdu) final {}
  void write_pdu_bcch_dlsch(unique_byte_buffer_t sdu) final {}
  void write_pdu_pcch(unique_byte_buffer_t sdu) final {}
  void write_pdu_mch(uint32_t lcid, srsran::unique_byte_buffer_t sdu) final { sdus.push_back(std::move(sdu)); }
  void notify_delivery(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) final {}
  void notify_failure(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sns) final {}

  // RRC interface
  void        max_retx_attempted() final {}
  void        protocol_failure() final {}
  const char* get_rb_name(uint32_t lcid) { return ""; }
  void        set_expected_sdu_len(uint32_t len) { expected_sdu_len = len; }

  uint32_t get_num_sdus() { return sdus.size(); }

  // TODO: this should be private
  std::vector<unique_byte_buffer_t> sdus;
  uint32_t                          expected_sdu_len = 0;
};

class rlc_am_tester : public srsue::pdcp_interface_rlc, public srsue::rrc_interface_rlc
{
public:
  explicit rlc_am_tester(bool save_sdus_, rlc_pcap* pcap_) : save_sdus(save_sdus_), pcap(pcap_) {}

  // PDCP interface
  void write_pdu(uint32_t lcid, unique_byte_buffer_t sdu)
  {
    assert(lcid == 1);
    if (save_sdus) {
      sdus.push_back(std::move(sdu));
    }
  }
  void write_pdu_bcch_bch(unique_byte_buffer_t sdu) {}
  void write_pdu_bcch_dlsch(unique_byte_buffer_t sdu) {}
  void write_pdu_pcch(unique_byte_buffer_t sdu) {}
  void write_pdu_mch(uint32_t lcid, srsran::unique_byte_buffer_t pdu) {}
  void notify_delivery(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sn_vec)
  {
    assert(lcid == 1);
    for (uint32_t pdcp_sn : pdcp_sn_vec) {
      if (notified_counts.find(pdcp_sn) == notified_counts.end()) {
        notified_counts[pdcp_sn] = 0;
      }
      notified_counts[pdcp_sn] += 1;
    }
  }
  void notify_failure(uint32_t lcid, const srsran::pdcp_sn_vector_t& pdcp_sn_vec)
  {
    assert(lcid == 1);
    // TODO
  }

  // RRC interface
  void max_retx_attempted() { max_retx_triggered = true; }
  void protocol_failure() { protocol_failure_triggered = true; }

  const char* get_rb_name(uint32_t lcid) { return ""; }

  std::vector<unique_byte_buffer_t> sdus;
  rlc_pcap*                         pcap                       = nullptr;
  bool                              max_retx_triggered         = false;
  bool                              protocol_failure_triggered = false;
  bool                              save_sdus                  = true;

  std::map<uint32_t, uint32_t> notified_counts; // Map of PDCP SNs to number of notifications
};

bool rx_is_tx(const rlc_bearer_metrics_t& rlc1_metrics, const rlc_bearer_metrics_t& rlc2_metrics)
{
  if (rlc1_metrics.num_tx_pdu_bytes != rlc2_metrics.num_rx_pdu_bytes) {
    return false;
  }

  if (rlc2_metrics.num_tx_pdu_bytes != rlc1_metrics.num_rx_pdu_bytes) {
    return false;
  }
  return true;
}
} // namespace srsran

#endif // SRSRAN_RLC_TEST_COMMON_H