#ifndef FSFW_TMTCPACKET_PUS_TCPACKETPUSA_H_
#define FSFW_TMTCPACKET_PUS_TCPACKETPUSA_H_

#include "../ccsds_header.h"
#include "TcPacketBase.h"

#include <cstdint>

/**
 * This struct defines a byte-wise structured PUS TC A Data Field Header.
 * Any optional fields in the header must be added or removed here.
 * Currently, the Source Id field is present with one byte.
 * @ingroup tmtcpackets
 */
struct PUSTcDataFieldHeader {
    uint8_t version_type_ack;
    uint8_t service_type;
    uint8_t service_subtype;
    uint8_t source_id;
};

/**
 * This struct defines the data structure of a PUS Telecommand A packet when
 * accessed via a pointer.
 * @ingroup tmtcpackets
 */
struct TcPacketPointer {
    CCSDSPrimaryHeader primary;
    PUSTcDataFieldHeader dataField;
    uint8_t appData;
};


class TcPacketPusA: public TcPacketBase {
public:
    static const uint16_t TC_PACKET_MIN_SIZE = (sizeof(CCSDSPrimaryHeader) +
            sizeof(PUSTcDataFieldHeader) + 2);

    /**
     * Initialize a PUS A telecommand packet which already exists. You can also
     * create an empty (invalid) object by passing nullptr as the data pointer
     * @param setData
     */
    TcPacketPusA(const uint8_t* setData);

    // Base class overrides
    virtual uint8_t getSecondaryHeaderFlag() override;
    virtual uint8_t getPusVersionNumber() override;
    virtual uint8_t getAcknowledgeFlags() override;
    virtual uint8_t getService() const override;
    virtual uint8_t getSubService() override;
    const uint8_t* getApplicationData() const override;
    uint16_t getApplicationDataSize() override;
    uint16_t getErrorControl() override;
    void setErrorControl() override;
    size_t calculateFullPacketLength(size_t appDataLen) override;

protected:

    void setData(const uint8_t* pData) override;

    /**
     * Initializes the Tc Packet header.
     * @param apid APID used.
     * @param sequenceCount Sequence Count in the primary header.
     * @param ack Which acknowledeges are expected from the receiver.
     * @param service   PUS Service
     * @param subservice PUS Subservice
     */
    void initializeTcPacket(uint16_t apid, uint16_t sequenceCount, uint8_t ack,
            uint8_t service, uint8_t subservice);

    /**
     * A pointer to a structure which defines the data structure of
     * the packet's data.
     *
     * To be hardware-safe, all elements are of byte size.
     */
    TcPacketPointer* tcData = nullptr;
};


#endif /* FSFW_TMTCPACKET_PUS_TCPACKETPUSA_H_ */