/*
  Copyright (c) 2016-2020 Peter Antypas

  This file is part of the MAIANA™ transponder firmware.

  The firmware is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>
 */


#ifndef RXPACKET_HPP_
#define RXPACKET_HPP_

#include <inttypes.h>
#include "_assert.h"
#include "AISChannels.h"
#include "config.h"
#include "ObjectPool.hpp"


using namespace std;

class RXPacket
{
public:
  RXPacket ();
  ~RXPacket ();
  RXPacket(const RXPacket &copy);
  RXPacket &operator=(const RXPacket &copy);
public:

  void setSlot(uint32_t slot);

  void setChannel(VHFChannel channel);
  VHFChannel channel() const;


  void discardCRC();
  void addFillBits(uint8_t numBits);

  void addByte(uint8_t byte);

  uint16_t size() const;
  uint8_t bit(uint16_t pos) const;
  uint32_t bits(uint16_t pos, uint8_t count) const;

  uint16_t crc() const;
  bool checkCRC() const;
  bool isBad() const;
  void reset();

  // Every AIS message contains these 3 attributes at a minimum, so we expose them at the packet level
  uint8_t messageType() const;
  uint8_t repeatIndicator() const;
  uint32_t mmsi() const;

  // These are link-level attributes
  uint32_t slot() const;
  uint8_t rssi() const;
  void setRSSI(uint8_t);
private:
  void addBit(uint8_t bit);
  void addBitCRC(uint8_t bit);
private:
  struct
  {
    uint8_t mPacket[MAX_AIS_RX_PACKET_SIZE/8+1];
    uint16_t mSize;
    uint16_t mCRC;
    mutable uint8_t mType;
    mutable uint8_t mRI;
    mutable uint32_t mMMSI;
    uint32_t mSlot;
    VHFChannel mChannel;
    uint8_t mRSSI;
  }
  mState;
};

#endif /* RXPACKET_HPP_ */