#ifndef MESSAGE_HELPER_H_INCLUDED
#define MESSAGE_HELPER_H_INCLUDED

#include <cinttypes>
#include <QByteArray>
#include <QByteArrayList>
#include <QString>

class MessageHelper {
public:
    enum PacketType : std::uint8_t {
        POS_ECR = 0,
        // POS_EXT = 1,
        MESSAGE_RECEIVED_POSITIVE_ACK = 0x0A,
        MESSAGE_RECEIVED_NEGATIVE_ACK = 0x0F
        // POS_HOST_FORMAT_1_ENCRYPTED   = 0x11,
        // POS_HOST_FORMAT_1_UNENCRYPTED = 0x21
    };

    explicit MessageHelper(QString const &posID = "T-TPS-SELF2002in",
                           QString const &apak = "8AC304380E0E476BA2558B75DB9E2516");
    explicit MessageHelper(QByteArray const &posID, QString const &apak);
    ~MessageHelper();


    void createRawPacket(PacketType PacketType,
                         QByteArray const &encryptedPacketId,
                         QByteArray const &message);

    bool insertEncryptedPacketID(QByteArray const &encryptedPacketID);

    QByteArrayList const &getMessageChunksToSend();
    QByteArrayList const &createLoginMessageChunksToSend(char ext);

// private:

    QByteArray m_posID;
    QByteArray m_apak;
    uint8_t m_posIDLength;
    QByteArray m_messageHeaderPrefix;
    QByteArray m_rawPacket; // without leading STX and trailing [ETX(1/2), LRC]
    QByteArray m_loginMessage;
    QByteArrayList m_messageChunkList;

    bool setMessageHeaderPacketType(PacketType packetType);
    bool createMessageHeaderPrefix(PacketType packetType, QByteArray const &encryptedPacketID);
    void createLoginMessage();

    static QByteArray const &mask(QByteArray &messageChunk);
    static QByteArray const &unMask(QByteArray &messageChunk);
};

#endif // MESSAGE_HELPER_H_INCLUDED