/**
* Digital Voice Modem - Host Software
* GPLv2 Open Source. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* @package DVM / Host Software
*
*/
//
// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
//
/*
*   Copyright (C) 2016,2017 by Jonathan Naylor G4KLX
*   Copyright (C) 2017-2022 by Bryan Biedenkapp N2PLL
*
*   This program 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 2 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, write to the Free Software
*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if !defined(__P25_PACKET_DATA_H__)
#define __P25_PACKET_DATA_H__

#include "Defines.h"
#include "p25/data/DataBlock.h"
#include "p25/data/DataHeader.h"
#include "p25/data/LowSpeedData.h"
#include "p25/lc/LC.h"
#include "p25/Control.h"
#include "Timer.h"

#include <cstdio>
#include <string>
#include <unordered_map>

namespace p25
{
    // ---------------------------------------------------------------------------
    //  Class Prototypes
    // ---------------------------------------------------------------------------

    class HOST_SW_API Control;
    namespace packet { class HOST_SW_API Trunk; }

    namespace packet
    {
        // ---------------------------------------------------------------------------
        //  Class Declaration
        //      This class implements handling logic for P25 data packets.
        // ---------------------------------------------------------------------------

        class HOST_SW_API Data {
        public:
            /// <summary>Resets the data states for the RF interface.</summary>
            void resetRF();

            /// <summary>Process a data frame from the RF interface.</summary>
            bool process(uint8_t* data, uint32_t len);
            /// <summary>Process a data frame from the network.</summary>
            bool processNetwork(uint8_t* data, uint32_t len, uint32_t blockLength);

            /// <summary>Helper to check if a logical link ID has registered with data services.</summary>
            bool hasLLIdFNEReg(uint32_t llId) const;

            /// <summary>Helper to write user data as a P25 PDU packet.</summary>
            void writeRF_PDU_User(data::DataHeader& dataHeader, const uint8_t* pduUserData, bool clearBeforeWrite = false);

            /// <summary>Updates the processor by the passed number of milliseconds.</summary>
            void clock(uint32_t ms);

        private:
            friend class p25::Control;
            Control* m_p25;

            RPT_RF_STATE m_prevRfState;

            data::DataBlock* m_rfData;
            data::DataHeader m_rfDataHeader;
            data::DataHeader m_rfSecondHeader;
            bool m_rfUseSecondHeader;
            bool m_rfExtendedAddress;
            uint8_t m_rfDataBlockCnt;
            uint8_t* m_rfPDU;
            uint32_t m_rfPDUCount;
            uint32_t m_rfPDUBits;

            data::DataBlock* m_netData;
            data::DataHeader m_netDataHeader;
            data::DataHeader m_netSecondHeader;
            bool m_netUseSecondHeader;
            bool m_netExtendedAddress;
            uint32_t m_netDataOffset;
            uint8_t m_netDataBlockCnt;
            uint8_t* m_netPDU;
            uint32_t m_netPDUCount;

            uint8_t* m_pduUserData;
            uint32_t m_pduUserDataLength;

            std::unordered_map<uint32_t, ulong64_t> m_fneRegTable;

            std::unordered_map<uint32_t, std::tuple<uint8_t, ulong64_t>> m_connQueueTable;
            std::unordered_map<uint32_t, Timer> m_connTimerTable;

            bool m_dumpPDUData;
            bool m_repeatPDU;

            bool m_verbose;
            bool m_debug;

            /// <summary>Initializes a new instance of the Data class.</summary>
            Data(Control* p25, bool dumpPDUData, bool repeatPDU, bool debug, bool verbose);
            /// <summary>Finalizes a instance of the Data class.</summary>
            ~Data();

            /// <summary>Write data processed from RF to the network.</summary>
            void writeNetwork(const uint8_t currentBlock, const uint8_t* data, uint32_t len);

            /// <summary>Helper to write a P25 PDU packet.</summary>
            void writeRF_PDU(const uint8_t* pdu, uint32_t bitLength, bool noNulls = false);
            /// <summary>Helper to write a network P25 PDU packet.</summary>
            void writeNet_PDU_Buffered();
            /// <summary>Helper to re-write a received P25 PDU packet.</summary>
            void writeRF_PDU_Buffered();
            /// <summary>Helper to write a PDU registration response.</summary>
            void writeRF_PDU_Reg_Response(uint8_t regType, uint8_t mfId, uint32_t llId, ulong64_t ipAddr);
            /// <summary>Helper to write a PDU acknowledge response.</summary>
            void writeRF_PDU_Ack_Response(uint8_t ackClass, uint8_t ackType, uint32_t llId, uint32_t srcLlId = 0U, bool noNulls = false);
        };
    } // namespace packet
} // namespace p25

#endif // __P25_PACKET_DATA_H__
