DCPlugin/src/ATBAPP/ATBDeviceControllerPlugin.cpp

#include "src/ATBAPP/ATBDeviceControllerPlugin.h"
#include "src/ATBAPP/ATBHealthEvent.h"
#include "src/ATBAPP/ATBMachineEvent.h"
#include "src/ATBAPP/Utils.h"
#include "src/ATBAPP/support/JSON.h"
#include "src/ATBAPP/support/DBusControllerInterface.h"
#include "src/ATBAPP/support/PTUSystem.h"
#include "src/ATBAPP/support/CashUtils.h"

#include <QTimer>
#include <QThread>
#include <QTextCodec>
#include <QDebug>

#include <QPluginLoader>
#include <QDateTime>
#include <QFileInfo>
#include <QCoreApplication>
#include <QUuid>

#include <cstdlib>



ATBDeviceControllerPlugin::ATBDeviceControllerPlugin(QObject *parent)
    : isMaster(false)
    , pluginState(PLUGIN_STATE::NOT_INITIALIZED)
    , eventReceiver(nullptr)
{
    this->setParent(parent);

    this->pluginInfo = QString::fromUtf8(pluginInfoString.c_str());

    if (!this->private_loadCashAgentLib("")) {
        return;
    }

    this->init_sc_dbus();


    //connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_templatePrintFinished_OK()),  this, SLOT(onPrintFinishedOK()),  Qt::QueuedConnection);
    //connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_templatePrintFinished_Err()), this, SLOT(onPrintFinishedERR()), Qt::QueuedConnection);

    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_gotNewCoin()),          this, SLOT(onCashGotCoin()),             Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_payStopByMax()),        this, SLOT(onCashPayStopByMax()),        Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_payStopByPushbutton()), this, SLOT(onCashPayStopByPushbutton()), Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_payStopByEscrow()),     this, SLOT(onCashPayStopByEscrow()),     Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_payStopByError()),      this, SLOT(onCashPayStopByError()),      Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_payStopByTimeout()),    this, SLOT(onCashPayStopByTimeout()),    Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_coinAttached()),        this, SIGNAL(coinAttached()),            Qt::QueuedConnection);     // check for errors, switch to mode IDLE

    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorServiceDoorOpened()),     this, SLOT(onServiceDoorOpened()), Qt::QueuedConnection);  // switch to ModeSERVICE
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorVaultDoorOpened()),       this, SLOT(onVaultDoorOpened()),   Qt::QueuedConnection);    // Screen?? with message
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorCoinBoxRemoved()),        this, SLOT(onCoinBoxRemoved()),    Qt::QueuedConnection);     // Create/Send Account
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorCoinBoxInserted()),       this, SLOT(onCoinBoxInserted()),   Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorCBinAndAllDoorsClosed()), this, SLOT(onCBinAndAllDoorsClosed()), Qt::QueuedConnection);
    connect(dynamic_cast<QObject*>(hw), SIGNAL(hwapi_doorAllDoorsClosed()),        this, SLOT(onAllDoorsClosed()),    Qt::QueuedConnection);     // check for errors, switch to mode IDLE

    // move hw object to separate thread:
    auto hwThread = new QThread;
    dynamic_cast<QObject*>(hw)->moveToThread(hwThread);
    hwThread->start();

    QString persistentDataFile = "/mnt/system_data/dc_persistentData.dat";
    this->persistentData = new PersistentData(persistentDataFile);

    this->diag = new DeviceControllerDiag(this->persistentData, this);
    connect(this->diag, &DeviceControllerDiag::newVoltage, this, &ATBDeviceControllerPlugin::onNewVoltage);


    // currentSelectedTicketType - number of used "Kombiticket" (deprecated) use TICKET_VARIANT in future
    this->currentSelectedTicketType = 0;
    this->currentTicket = new Ticket(TICKET_VARIANT::PARKING_TICKET, this);

    this->currentCashState = CASH_STATE::CACHE_EMPTY;

    this->cashStartAmountInt = 0;
}

ATBDeviceControllerPlugin::~ATBDeviceControllerPlugin() {}

PLUGIN_STATE ATBDeviceControllerPlugin::initDCPlugin(QObject *eventReceiver, const QSettings & settings)
{
    this->eventReceiver = eventReceiver;

    // read variables from setting
    this->serialPortName = settings.value("ATBDeviceControllerPlugin/serialPort", "ttymxc2").toString();
    QByteArray printerEncoding = settings.value("ATBDeviceControllerPlugin/printerEncoding", "ISO 8859-2").toString().toLatin1();
    QString printerLocaleString = settings.value("ATBDeviceControllerPlugin/printerLocale", "de_DE").toString().toLatin1();
    this->printerLocale = QLocale(printerLocaleString);


    if (this->isMaster) {
        // open serial port
        hw->dc_openSerial(5, "115200", this->serialPortName, 1);
    }

    hw->dc_autoRequest(true);

    hw->dc_setNewCustomerNumber(PTUSystem::readCustomerNumber());
    hw->dc_setNewMachineNumber(PTUSystem::readMachineNumber());
    hw->dc_setNewZone(PTUSystem::readZoneNumber());
    hw->dc_setNewBorough(PTUSystem::readGroupNumber());

    hw->rtc_setDateTime();

    // this is necessary to init the CashAgentLib (!)
    hw->vend_failed();

    // read sw-version and store it in persistentData, if changed
    QString dc_fw_version = hw->dc_getSWversion().remove(QChar('\0'));
    qCritical() << "ATBDeviceControllerPlugin: DC firmware version: " << dc_fw_version;
    this->persistentData->setDCFirmwareVersion(dc_fw_version);
    this->persistentData->serializeToFile();

    // text encoding for printer
    this->codec = QTextCodec::codecForName(printerEncoding);

    if (this->codec == nullptr) {
        printerEncoding = "ISO 8859-1";
        qCritical() << "ATBDeviceControllerPlugin: ERROR: printer encoding \"" << printerEncoding << "\" is not supported!";
        qCritical() << "     ... use default encoding: " << printerEncoding;
        this->codec = QTextCodec::codecForName(printerEncoding);
    }
    else {
        qCritical() << "ATBDeviceControllerPlugin: Set printer encoding to " << printerEncoding;
    }

    this->diag->init(this->hw, this->eventReceiver);

    this->pluginState = PLUGIN_STATE::INITIALIZED;

    return pluginState;
}


void ATBDeviceControllerPlugin::sendDeviceParameter(const QJsonObject &jsonObject)
{

    qCritical() << "ATBDeviceControllerPlugin::sendDeviceParameter:";


    // extract location info and store location info in persistent data:
    QJsonValue jsonSubVal;
    jsonSubVal = jsonObject["Location"];

    QString locationString = jsonSubVal.toString("");

    if (locationString == "") {

        qCritical() << "    -->  locationString NULL";
        return;
    }


    uint16_t customerNr = PTUSystem::readCustomerNumber();
    uint16_t machineNr  = PTUSystem::readMachineNumber();
    uint16_t borough    = PTUSystem::readZoneNumber();
    uint16_t zone       = PTUSystem::readGroupNumber();
    uint16_t alias      = 0;
    QByteArray locationBa = locationString.toLocal8Bit();

    this->hw->sendMachineID(customerNr, machineNr, borough, zone, alias, locationBa.data());
}



void ATBDeviceControllerPlugin::startPhysicalLayer()
{
    if (!this->isMaster) return;

    if (this->pluginState == PLUGIN_STATE::NOT_INITIALIZED)
    {
        qCritical() << "ATBDeviceControllerPlugin::startPhysicalLayer(): plugin is not initialized";
        return;
    }

    qCritical() << "ATBDeviceControllerPlugin::startPhysicalLayer() " << endl
                << "     -> use master lib " << endl
                << "     -> start physical layer";


    // open serial port
    hw->dc_openSerial(5, "115200", this->serialPortName, 1);

    hw->dc_autoRequest(true);
}

void ATBDeviceControllerPlugin::stopPhysicalLayer()
{
    // store persistent data
    this->persistentData->serializeToFile();

    // skip, if we use slave lib
    if (!this->isMaster) return;

    if (this->pluginState == PLUGIN_STATE::NOT_INITIALIZED)
    {
        qCritical() << "ATBDeviceControllerPlugin::startPhysicalLayer(): plugin is not initialized";
        return;
    }

    hw->dc_autoRequest(false);

    hw->dc_closeSerial();
}


void ATBDeviceControllerPlugin::reboot()
{
    // note:
    // - dc reset lasts about ~5s !
    // - makes a power cycle to certain components, e.g. card terminal
    hw->bl_rebootDC();
}

void ATBDeviceControllerPlugin::reset()
{
    // note:
    // - dc reset lasts about ~5s !
    // - makes a power cycle to certain components, e.g. card terminal
    hw->dc_OrderToReset();
}



// Handle Mode-Changes --------------------------------------------------------

void ATBDeviceControllerPlugin::onChangedProgramModeToSELL()
{
    hw->dc_autoRequest(true);
    hw->rtc_setDateTime();
    hw->mdb_switchWake(0);   // wakeup MDB components
}

void ATBDeviceControllerPlugin::onChangedProgramModeToSERVICE()
{
    hw->dc_autoRequest(true);
    hw->mdb_switchWake(0);   // wakeup MDB components
}

void ATBDeviceControllerPlugin::onChangedProgramModeToIDLE()
{
    hw->dc_autoRequest(true);
    this->diag->diagRequest();
    hw->mdb_switchWake(1);

}

void ATBDeviceControllerPlugin::onChangedProgramModeToOOO()
{

}


// TASKS: Cash handling -------------------------------------------------------
void ATBDeviceControllerPlugin::requestStartCashInput(const QString & amount)
{
    qCritical() << "Start Cash vending with amount = " << amount;

    this->cashStartAmountInt = static_cast<uint32_t>(amount.toUInt());

    if (this->cashStartAmountInt == 0) this->cashStartAmountInt = UINT_MAX;

    hw->cash_startPayment(this->cashStartAmountInt);
}

void ATBDeviceControllerPlugin::requestStopCashInput()
{
    hw->cash_stopPayment();

    // we need new cash value in application...
    QTimer::singleShot(2500, this, SLOT(onCashPayStopedSuccess()));
}

void ATBDeviceControllerPlugin::cashCollect()
{
    hw->vend_success();

    // inserted amount
    uint32_t amountInt = this->hw->getInsertedAmount();
    QString amountString = QString::number(amountInt);

    // inserted coins
    uint32_t amountCoinsInt = CashUtils::getAmountOfInsertedCoins(this->hw);
    QString amountCoinsString = QString::number(amountCoinsInt);

    // inserted notes
    uint32_t amountNotesInt = CashUtils::getAmountOfInsertedNotes(this->hw);
    QString amountNotesString = QString::number(amountNotesInt);


    if (this->coinProcessor() == nsDeviceControllerInterface::COIN_PROCESSOR::CHANGER) {
        QTimer::singleShot(1000, this, &ATBDeviceControllerPlugin::onCashChangerState);
    }
    else {
        emit this->cashPaymentFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                                  amountString,
                                  amountCoinsString,        // coins
                                  amountNotesString,        // notes
                                  0,                        // proposed change
                                  "",
                                  "");
        this->currentCashState = CASH_STATE::CACHE_EMPTY;
    }
}

void ATBDeviceControllerPlugin::cashAbort()
{
    hw->vend_failed();
    this->currentCashState = CASH_STATE::CACHE_EMPTY;
}

// Coin/Cash processing variants ----------------------------------------------

nsDeviceControllerInterface::COIN_PROCESSOR ATBDeviceControllerPlugin::coinProcessor()
{
    return this->diag->coinProcessorType;
}

nsDeviceControllerInterface::BILL_ACCEPTOR  ATBDeviceControllerPlugin::billAcceptor()
{
    return this->diag->billAcceptor;
}


// TASKS: Account -------------------------------------------------------------

// for an external account request, e.g. by an ui-button:
void ATBDeviceControllerPlugin::requestAccount()
{
    qCritical() << "ATBDeviceControllerPlugin::requestAccount()";

    this->private_startAccount();
}

void ATBDeviceControllerPlugin::private_startAccount()
{
    uint16_t backupedAccNumbers[8];    // array of account numbers
    uint8_t nrOfVals;                  // number of saved accounts

    // it is not defined which one is the latest account
    hw->log_getHoldAccountNumbers(&nrOfVals, backupedAccNumbers);

    // DEBUG
    qCritical() << "Start account: ";
    qCritical() << "                  nrOfVals = " << nrOfVals;
    for (int i=0; i<nrOfVals; ++i) {
        qCritical() << "      backupedAccNumbers[" << i << "] = " << backupedAccNumbers[i];
    }

    qsort( backupedAccNumbers, nrOfVals, sizeof (uint16_t), Utils::compare );

    uint16_t latestAccountNumber = backupedAccNumbers[nrOfVals-1];


    // DEBUG
    qCritical() << "       latestAccountNumber = " << latestAccountNumber;

    hw->log_selectVaultRecord(latestAccountNumber);

    this->accountCheckCounter = 0;
    QTimer::singleShot(500, this, SLOT(private_checkAccountData()));
}

void ATBDeviceControllerPlugin::private_checkAccountData()
{
    // DEBUG
    qCritical() << "      --> private_checkAccountData()";

    if (hw->log_chkIfVaultRecordAvailable()) {
        this->private_getAccountData();
    }
    else {
        if (this->accountCheckCounter < 10) {
            this->accountCheckCounter++;
            QTimer::singleShot(500, this, SLOT(private_checkAccountData()));
        }
        else {
            // cannot get accountData within ~10*500ms
            qCritical() << "checkAccountData() failed";

            // simulate:
            this->private_getAccountData();


            // TODO: create and send an HealthEvent...
        }
    }
}


void ATBDeviceControllerPlugin::private_getAccountData()
{
    // DEBUG
    qCritical() << "      --> private_getAccountData()";

    struct T_vaultRecord retVR;

    hw->log_getVaultRecord(&retVR);

    QHash<QString, QVariant> accountData;

    accountData.insert("AccountingNumber", QString::number(retVR.AccountingNumber));


    // build dateTime: -------------------------------------------------------
    // Example: "2023-07-19T18:24:01.063+02:00"
    QString startDateTimeString;
    QString formatString = "yyyy-MM-ddThh:mm:ss";
    uint year = retVR.year + 2000;
    startDateTimeString.append(QString::number(year)).append("-");
    uint month = retVR.month;
    startDateTimeString.append(QString::number(month).rightJustified(2, '0')).append("-");
    uint day = retVR.dom;
    startDateTimeString.append(QString::number(day).rightJustified(2, '0')).append("T");
    uint hour = retVR.hour;
    startDateTimeString.append(QString::number(hour).rightJustified(2, '0')).append(":");
    uint minute = retVR.min;
    startDateTimeString.append(QString::number(minute).rightJustified(2, '0')).append(":");
    uint seconds = retVR.sec;
    startDateTimeString.append(QString::number(seconds).rightJustified(2, '0'));

    qCritical() << "     startDateTimeString = " << startDateTimeString;

    QDateTime startDateTime = QDateTime::fromString(startDateTimeString, formatString);
    accountData.insert("accountStartTime", startDateTime);
    //-------------------------------------------------------------------------

    // COINS in Vault: --------------------------------------------------------

    int numberOfCoinVariants = sizeof(retVR.coinsInVault)/sizeof(retVR.coinsInVault[0]);

    // DEBUG
    qCritical() << "      NumberOfCoinVariants = " << numberOfCoinVariants;

    // limit numberOfCoinVariants:
    if (numberOfCoinVariants > 16) { numberOfCoinVariants = 16; }

    accountData.insert("NumberOfCoinVariants", numberOfCoinVariants);
    for (int i = 0; i < numberOfCoinVariants; ++i) {
        accountData.insert("COIN_" + QString::number(i+1) + "_Quantity",  retVR.coinsInVault[i]);
        accountData.insert("COIN_" + QString::number(i+1) + "_Value",     retVR.coinDenomination[i]);

        // DEBUG
        qCritical() << "COIN_" + QString::number(i+1) + "_Quantity = " << accountData["COIN_" + QString::number(i) + "_Quantity"];
        qCritical() << "COIN_" + QString::number(i+1) + "_Value    = " << accountData["COIN_" + QString::number(i) + "_Value"];
    }

    // NOTES in stacker: --------------------------------------------------------

    int numberOfBillVariants = sizeof(retVR.billsInStacker)/sizeof(retVR.billsInStacker[0]);

    // DEBUG
    qCritical() << "      numberOfBillVariants = " << numberOfBillVariants;

    // limit numberOfBillVariants:
    if (numberOfBillVariants > 16) { numberOfBillVariants = 16; }

    accountData.insert("NumberOfBillVariants", numberOfBillVariants);
    for (int i = 0; i < numberOfBillVariants; ++i) {
        accountData.insert("NOTE_" + QString::number(i+1) + "_Quantity",  retVR.billsInStacker[i]);
        accountData.insert("NOTE_" + QString::number(i+1) + "_Value",     retVR.billDenom[i]);

        // DEBUG
        qCritical() << "NOTE_" + QString::number(i+1) + "_Quantity = " << accountData["NOTE_" + QString::number(i+1) + "_Quantity"];
        qCritical() << "NOTE_" + QString::number(i+1) + "_Value    = " << accountData["NOTE_" + QString::number(i+1) + "_Value"];
    }



    emit requestAccountResponse(accountData);
}


// Door Events / Hardware contacts --------------------------------------------
void ATBDeviceControllerPlugin::onServiceDoorOpened()
{
    qCritical() << "ATBDeviceControllerPlugin::onServiceDoorOpened()";

    // ... to detect alarm etc.
    this->diag->diagRequest();

    // switch to mode service
    emit this->requestModeSERVICE();

    // TODO:
    // - create an HealthEvent (-> ISMAS-Event)
}

void ATBDeviceControllerPlugin::onVaultDoorOpened()
{
    qCritical() << "ATBDeviceControllerPlugin::onVaultDoorOpened()";

    // ... to detect alarm etc.
    this->diag->diagRequest();

    // this is started here because we want to keep ptu awake in order to get
    // coin box removed / inserted etc.
    // BackgroundTask("ACCOUNT") is finished, if account message is sent to ISMAS!
    this->dbus->startBackgroundTask("DOOR_OPEN");

    emit this->requestModeACCOUNT();

    // send service message, delayed:
    QTimer::singleShot(1000, this, [this](){
        emit this->showServiceText(nsDeviceControllerInterface::SERVICE_TEXT::VAULT_DOOR_OPENED, "Please remove coinbox");
        hw->prn_cut(3);
    } );
}

void ATBDeviceControllerPlugin::onCoinBoxRemoved()
{
    qCritical() << "ATBDeviceControllerPlugin::onCoinBoxRemoved()";

    // BackgroundTask("ACCOUNT") is finished, if account message is sent to ISMAS!
    this->dbus->startBackgroundTask("ACCOUNT");

    emit this->showServiceText(nsDeviceControllerInterface::SERVICE_TEXT::COIN_BOX_REMOVED, "Please insert coinbox");

    QTimer::singleShot(4000, this, SLOT(private_startAccount()));
}

void ATBDeviceControllerPlugin::onCoinBoxInserted()
{
    qCritical() << "ATBDeviceControllerPlugin::onCoinBoxInserted()";

    emit this->showServiceText(nsDeviceControllerInterface::SERVICE_TEXT::COIN_BOX_INSERTED, "Please close vault door");
    // emit this->showServiceText(0x1234);
}

/**
 * This is called, when all CoinBox is inserted and all doors
 * are closed.
 */
void ATBDeviceControllerPlugin::onCBinAndAllDoorsClosed()
{
    qCritical() << "ATBDeviceControllerPlugin::onCBinAndAllDoorsClosed()";

    QTimer::singleShot(2000, this, SIGNAL(requestModeIDLE()));

    this->dbus->finishedBackgroundTask("DOOR_OPEN");
}

/**
 *  This is called, when all no coinbox is inserted and all doors are
 *  closed.
 */
void ATBDeviceControllerPlugin::onAllDoorsClosed()
{
    qCritical() << "ATBDeviceControllerPlugin::onAllDoorsClosed()";

    emit this->requestModeIDLE();
    this->dbus->finishedBackgroundTask("DOOR_OPEN");

    // TODO: check for errors and create a machine event
}

void ATBDeviceControllerPlugin::onNewVoltage(uint32_t voltage)
{
    qCritical() << "ATBDeviceControllerPlugin::onNewVoltage() = " << voltage;

    QString voltageString = QString::number(voltage);

    JSON::setPrettySerialize(true);
    JSON::JsonObject json;

    json = JSON::objectBuilder()
                  ->set("Name", "batt")
                  ->set("Value", voltageString)
                  ->set("Unit", "V")
            ->create();


    ATBHealthEvent *healthEvent = new ATBHealthEvent(
                ATB_HEALTH_MODE::STATE,
                "VOLTAGE",
                JSON::serialize(json)
                );

    QCoreApplication::postEvent(eventReceiver, healthEvent);
}





// TASKS: printing ------------------------------------------------------------



/**
 * @brief ATBDeviceControllerPlugin::requestPrintTicket
 * @param ticketVariant
 * @param printingData
 *
 * Setup (initNew()) Ticket-Object
 *
 */
void ATBDeviceControllerPlugin::requestPrintTicket(nsDeviceControllerInterface::TICKET_VARIANT ticketVariant, const QHash<QString, QVariant> & printingData)
{
    QList<quint8> templateList;

    // TODO: read template list from .ini


    // DEBUG
    qCritical() << "------------------------------------------------------------------------";
    qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket()";
    qCritical() << "     TICKET_VARIANT: " << ticketVariant;
    qCritical() << "          dyn1_list: " << printingData["dyn1_list"].toStringList();
    qCritical() << "          dyn2_list: " << printingData["dyn2_list"].toStringList();
    qCritical() << "------------------------------------------------------------------------";


    if (!this->currentTicket->initNew(ticketVariant, templateList, printingData)) {
        this->errorCode = this->currentTicket->getErrorCode();
        this->errorDescription = this->currentTicket->getErrorCode();

        qCritical() << "ERROR: ticket->initNew: " << ticketVariant;

        this->onPrintFinishedERR();
        return;
    }

    /*
    if (!this->hw->dc_isPortOpen()) {
        qCritical() << "    ... serial port is not open!";
        this->onPrintFinishedERR();
        return;
    }
    */

    this->prepareDynTemplateData();
}

void ATBDeviceControllerPlugin::requestPrintReceipt(const QHash<QString, QVariant> & printingData)
{
    Q_UNUSED(printingData)

    qCritical() << "ATBDeviceControllerPlugin::requestPrintReceipt() is currently not implemented";
}

void ATBDeviceControllerPlugin::requestPrintReceipt(const QString & printingString)
{
    QByteArray ba = printingString.toUtf8();
    hw->prn_switchPower(true);
    hw->prn_setFonts(8,12,0,0);
    hw->prn_sendText(&ba);
    QTimer::singleShot(4000, this, SLOT(onPrinterWaitForPrintingReceipt()));

    //QTimer::singleShot(2000, this, [this](){ hw->prn_cut(3);  } );
}

void ATBDeviceControllerPlugin::onPrinterWaitForPrintingReceipt()
{
    quint8 printerResult = this->hw->prn_getPrintResult();

    switch (printerResult) {
    case 0:    // still printing
        qCritical() << "--> printer: WaitForPrintingReceipt";
        QTimer::singleShot(2000, this, SLOT(onPrinterWaitForPrintingReceipt()));
        break;
    case 1:    // printing finished, Ok
        qCritical() << "DC Finished printing receipt";
        emit this->printReceiptFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                                        // TODO: TicketNumber
                                        "",
                                        "");
        hw->prn_switchPower(true);
        hw->prn_cut(3);
        break;
    case 2:    // printing finished, Error
        qCritical() << "DC Error: wait for printing receipt";
        this->errorCode = "PRINTER";               // TODO: get more detailed error code from low level API
        this->errorDescription = "Printer error";  // TODO: get more detailed error description from low level API

        emit this->printReceiptFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                                       this->errorCode,
                                       this->errorDescription);
        break;
    default:
        qCritical() << "DC Error: wait for printing receipt";
        this->errorCode = "PRINTER";               // TODO: get more detailed error code from low level API
        this->errorDescription = "Printer error";  // TODO: get more detailed error description from low level API

        emit this->printReceiptFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                                       this->errorCode,
                                       this->errorDescription);
        break;
    }

}


void ATBDeviceControllerPlugin::requestPrintTicket(const QHash<QString, QVariant> & printingData)
{
    struct T_dynDat *dynTicketData = new T_dynDat;
    memset(dynTicketData, 0, sizeof(*dynTicketData));

    qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket( "         << endl
                << "     licenseplate = " << printingData["licenseplate"]    << endl
                << "           amount = " << printingData["amount"]          << endl
                << "       parkingEnd = " << printingData["parkingEnd"]      << endl
                << "  currentDateTime = " << printingData["currentDateTime"] << endl;

    QDateTime parkingEndDateTime = QDateTime::fromString(printingData["parkingEnd"].toString(),  Qt::ISODate);
    QDateTime currentDateTime    = QDateTime::fromString(printingData["currentDateTime"].toString(), Qt::ISODate);

    QString parkingEndDateString = this->printerLocale.toString(parkingEndDateTime.date(), QLocale::ShortFormat);
    QString currentDateString    = this->printerLocale.toString(currentDateTime.date(),    QLocale::ShortFormat);

    /* -----------------------------------------------------------------------------------------
     * note: the following highly depends on printer template files!
     * -----------------------------------------------------------------------------------------
     */

    // set dynamic printer data:
    QByteArray ba_licenseplate = codec->fromUnicode(printingData["licenseplate"].toString());
    memcpy((char*)dynTicketData->licensePlate, ba_licenseplate.data(), std::min(ba_licenseplate.size(),8));

    QByteArray ba_amount = codec->fromUnicode(printingData["amount"].toString());
    memcpy((char*)dynTicketData->vendingPrice,  ba_amount.data(), std::min(ba_amount.size(),8));  // Szeged
    memcpy((char*)dynTicketData->dynDat6,       ba_amount.data(), std::min(ba_amount.size(),8));  // Schoenau


    QByteArray ba_parkingEndTime = codec->fromUnicode(parkingEndDateTime.toString("hh:mm"));
    memcpy((char*)dynTicketData->parkingEnd,  ba_parkingEndTime.data(), std::min(ba_parkingEndTime.size(),8));

    QByteArray ba_parkingEndDate = codec->fromUnicode(parkingEndDateString);
    memcpy((char*)dynTicketData->currentTime,  ba_parkingEndDate.data(), std::min(ba_parkingEndDate.size(),8));
    // ! and yes... 'ParkingEndDate' is 'currentTime'

    QByteArray ba_currentDate = codec->fromUnicode(currentDateString);
    memcpy((char*)dynTicketData->currentDate,  ba_currentDate.data(), std::min(ba_currentDate.size(),8));


    // DEBUG
    /*
    uint8_t* buf = dynTicketData->licensePlate;
    int length = 64;
    for (int i = 0; i < length; ++i) {
            fprintf(stderr, "%d %02x %c\n", i, buf[i], buf[i]);
    }
    fprintf(stderr, "\n");
    */

    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket()";

    /*
    if (!this->hw->dc_isPortOpen()) {
        qCritical() << "    ... serial port is not open!";
        this->onPrintFinishedERR();
        return;
    }
    */

    // TODO: wird hier nur 'licensePlate' gedruckt?
    if (!this->hw->prn_sendDynamicPrnValues(dynTicketData->licensePlate)) {
        this->errorCode = "hwapi::prn_sendDynamicPrnValues";
        this->errorDescription = "hwapi method 'hwapi::prn_sendDynamicPrnValues' result is false";

        qCritical() << "ERROR:";
        qCritical() << "ATBDeviceControllerPlugin::requestPrintTicket( "        << endl
                    << "     licenseplate = " << printingData["licenseplate"]   << endl
                    << "           amount = " << printingData["amount"]         << endl
                    << "       parkingEnd = " << printingData["parkingEnd"]     << endl
                    << "      currentTime = " << printingData["currentTime"]    << endl
                    << "      currentDate = " << printingData["currentDate"]    << endl;


        this->onPrintFinishedERR();
        return;
    }

    // set ticket type:
    //      00281 - Szeged:
    //          1 - Cash / ShortTimeParking
    //          2 - Card / ShortTimeParking
    //          3 - Cash / DayTicket
    //          4 - Card / DayTicket
    //      00744 - NeuhauserVT/NAZ:
    //          1 - Erwachsene
    //          2 - Jugendliche
    //      00741 - NeuhauserVT/Linsinger Maschinenbau
    //          t.b.d.
    QString paymentType = printingData["paymentType"].toString(); // must be "CASH" | "CARD"
    QString productName = printingData["product"].toString();     // must be "ShortTimeParking" | "DayTicket"

    if ( (paymentType == "CASH") && (productName == "SHORT_TERM_PARKING") ) {
        this->currentSelectedTicketType = 1; // "Kombiticket #1"
    }
    else
    if ( (paymentType == "CARD") && (productName == "SHORT_TERM_PARKING") ) {
        this->currentSelectedTicketType = 2; // "Kombiticket #2"
    }
    else
    if ( (paymentType == "CASH") && (productName == "DAY_TICKET") ) {
        this->currentSelectedTicketType = 3; // "Kombiticket #3"
    }
    else
    if ( (paymentType == "CARD") && (productName == "DAY_TICKET") ) {
        this->currentSelectedTicketType = 4; // "Kombiticket #4"
    }
    else
    if ( productName == "DAY_TICKET_ADULT") {
        this->currentSelectedTicketType = 1;
    }
    else
    if ( productName == "DAY_TICKET_TEEN") {
        this->currentSelectedTicketType = 2;
    }
    else {
        qCritical() << "ERROR: requestPrintTicket(): invalid payment data:";
        qCritical() << "       paymentType = " << paymentType   << endl
                    << "       productName = " << productName   << endl;
        this->onPrintFinishedERR();
        return;
    }

    QTimer::singleShot(3000, this, SLOT(onPrinterDataPrepared()));
}


void ATBDeviceControllerPlugin::onPrinterDataPreparedForTemplates()
{
    if (this->currentTicket->templateList()->isEmpty()) return;

    this->onPrinterPrintNextTemplate();
}

void ATBDeviceControllerPlugin::onPrinterDataPrepared()
{
    this->hw->prn_printKombiticket(this->currentSelectedTicketType);

    // note: calling prn_getPrintResult() immediately may result in wrong answer!
    // We have to wait "about some seconds" until calling this function!
    QTimer::singleShot(4000, this, SLOT(onPrinterWaitForPrintingTicket()));

    // old: use printer templates:
    // this->currentTemplate = 1;
    // this->onPrinterPrintNextTemplate();
}

void ATBDeviceControllerPlugin::onPrinterWaitForPrintingTicket()
{
    quint8 printerResult = this->hw->prn_getPrintResult();

    switch (printerResult) {
    case 0:    // still printing
        qCritical() << "--> printer: WaitForPrintingTicket";
        QTimer::singleShot(2000, this, SLOT(onPrinterWaitForPrintingTicket()));
        break;
    case 1:    // printing finished, Ok
        this->onPrintFinishedOK();
        break;
    case 2:    // printing finished, Error
        this->onPrintFinishedERR();
        break;
    default:
        qCritical() << "DC Error: wait for printing";
        this->onPrintFinishedERR();
        break;
    }

}


void ATBDeviceControllerPlugin::onPrinterPrintNextTemplate()
{
    // template list must not be empty
    if (this->currentTicket->templateList()->isEmpty()) {
        this->onPrintFinishedERR();
        return;
    }

    qCritical() << "     ... print template " << this->currentTicket->templateList()->first();

    if (!this->hw->prn_printTemplate(this->currentTicket->templateList()->first())) {
        this->errorCode = "hwapi::prn_printTemplate";
        this->errorDescription = QString("hwapi method 'hwapi::onPrinterPrintNextTemplate(%1)' result is false").arg(this->currentTicket->templateList()->first());
        this->onPrintFinishedERR();
        return;
    }
    this->currentTicket->templateList()->removeFirst();
    this->currentTicket->setCurrentTemplateProcessed();

    if (this->currentTicket->templateList()->isEmpty()) {
        // all templates are printed
        QTimer::singleShot(2000, this, SLOT(onPrinterWaitForPrintingTicket()));
    }
    else {

        if (this->currentTicket->hasTemplateDynData()) {
            // set new dyn data:
            QTimer::singleShot(2000, this, SLOT(onPrinterPrepareDynTemplateData()));
        }
        else {
            // print next template
            QTimer::singleShot(2000, this, SLOT(onPrinterPrintNextTemplate()));
        }
    }
}

/************************************************************************************************
 * private slots, interface to low level hwapi
 *
 */
void ATBDeviceControllerPlugin::onPrintFinishedOK()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onPrintFinishedOK()";

    emit this->printTicketFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                                   // TODO: TicketNumber
                                   "",
                                   "");
}
void ATBDeviceControllerPlugin::onPrintFinishedERR()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onPrintFinishedERR()";


    this->errorCode = "PRINTER";               // TODO: get more detailed error code from low level API
    this->errorDescription = "Printer error";  // TODO: get more detailed error description from low level API

    emit this->printTicketFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                                   this->errorCode,
                                   this->errorDescription);
}



void ATBDeviceControllerPlugin::onPrinterPrepareDynTemplateData()
{
    this->prepareDynTemplateData();
}
void ATBDeviceControllerPlugin::prepareDynTemplateData()
{
    struct T_dynDat *dynTicketData = new T_dynDat;
    memset(dynTicketData, 0, sizeof(*dynTicketData));

    // setup dynTicketData dependent on currentTicket

    // DEBUG:
    qCritical() << "---------------------------------------------------";
    qCritical() << "ATBDeviceControllerPlugin::prepareDynTemplateData():";
    qCritical() << "    -> currentProcessedTemplateNumber: " << this->currentTicket->getCurrentProcessedTemplateNumber();
    qCritical() << "    -> this->currentTicket->variant(): " << this->currentTicket->variant();
    qCritical() << "---------------------------------------------------";

    switch (this->currentTicket->variant()) {
    case nsDeviceControllerInterface::TICKET_VARIANT::START_RECEIPT:
        private_setupDynTemplateData_START_RECEIPT(dynTicketData, this->currentTicket);
        break;
    case nsDeviceControllerInterface::TICKET_VARIANT::STOP_RECEIPT:
        private_setupDynTemplatData_STOP_RECEIPT(dynTicketData, this->currentTicket);
        break;
    case nsDeviceControllerInterface::TICKET_VARIANT::RECEIPT:
        break;
    case nsDeviceControllerInterface::TICKET_VARIANT::ERROR_RECEIPT:
        break;
    case nsDeviceControllerInterface::TICKET_VARIANT::PARKING_TICKET:
        break;
    case nsDeviceControllerInterface::TICKET_VARIANT::FOOD_STAMP:
        private_setupDynTemplatData_FOOD_STAMP(dynTicketData, this->currentTicket);
        break;
    }

    // C-Programmierung: wird hier nur 'licensePlate' gedruckt?
    if (!this->hw->prn_sendDynamicPrnValues(dynTicketData->licensePlate)) {
        this->errorCode = "hwapi::prn_sendDynamicPrnValues";
        this->errorDescription = "hwapi method 'hwapi::prn_sendDynamicPrnValues' result is false";

        qCritical() << "ERROR: hw->prn_sendDynamicPrnValues";

        this->onPrintFinishedERR();
        return;
    }

    QTimer::singleShot(1000, this, SLOT(onPrinterDataPreparedForTemplates()));
}


void ATBDeviceControllerPlugin::private_setupDynTemplateData_START_RECEIPT(struct T_dynDat *dynTicketData, Ticket *ticket)
{
    QDateTime parkingEndDateTime = QDateTime::fromString(ticket->getPrintingData()["parkingEnd"].toString(),  Qt::ISODate);
    QDateTime currentDateTime    = QDateTime::fromString(ticket->getPrintingData()["currentDateTime"].toString(), Qt::ISODate);

    QString parkingEndDateString = this->printerLocale.toString(parkingEndDateTime.date(), QLocale::ShortFormat);
    QString currentDateString    = this->printerLocale.toString(currentDateTime.date(),    QLocale::ShortFormat);


    // set dynamic printer data:
    QByteArray ba_licenseplate = codec->fromUnicode(ticket->getPrintingData()["licenseplate"].toString());
    memcpy((char*)dynTicketData->licensePlate, ba_licenseplate.data(), std::min(ba_licenseplate.size(),8));

    QByteArray ba_amount = codec->fromUnicode(ticket->getPrintingData()["amount"].toString());
    memcpy((char*)dynTicketData->vendingPrice,  ba_amount.data(), std::min(ba_amount.size(),8));  // Szeged
    memcpy((char*)dynTicketData->dynDat6,       ba_amount.data(), std::min(ba_amount.size(),8));  // Schoenau

    QByteArray ba_parkingEndTime = codec->fromUnicode(parkingEndDateTime.toString("hh:mm"));
    memcpy((char*)dynTicketData->parkingEnd,  ba_parkingEndTime.data(), std::min(ba_parkingEndTime.size(),8));

    QByteArray ba_parkingEndDate = codec->fromUnicode(parkingEndDateString);
    memcpy((char*)dynTicketData->currentTime,  ba_parkingEndDate.data(), std::min(ba_parkingEndDate.size(),8));
    // ! and yes... 'ParkingEndDate' is 'currentTime'

    QByteArray ba_currentDate = codec->fromUnicode(currentDateString);
    memcpy((char*)dynTicketData->currentDate,  ba_currentDate.data(), std::min(ba_currentDate.size(),8));
    // STAN for Szeged Start/Stop: must be 9 digits
    // --------------------------------------------------------------------------------------
    QString stan = codec->fromUnicode(ticket->getPrintingData()["STAN"].toString());
    qCritical() << "   requestPrintTicket() STAN = " << stan;
    QString stan1;
    QString stan2;
    if (stan.length() == 9) {
        stan1 = "     " + stan.mid(0,3);
        stan2 = stan.mid(3,3) + " " + stan.mid(6,3);
    }
    else {
        qCritical() << "ASSERT: ATBDeviceControllerPlugin::requestPrintTicket() invalid STAN: " << stan;
        stan1 = "     000";
        stan2 = "000 000";
    }
    QByteArray ba_stan1 = codec->fromUnicode(stan1);
    QByteArray ba_stan2 = codec->fromUnicode(stan2);


    // --------------------------------------------------------------------------------------

    memcpy((char*)dynTicketData->dynDat6, ba_stan1.data(), std::min(ba_stan1.size(),8));
    memcpy((char*)dynTicketData->dynDat7, ba_stan2.data(), std::min(ba_stan2.size(),8));
}

void ATBDeviceControllerPlugin::private_setupDynTemplatData_STOP_RECEIPT(struct T_dynDat *dynTicketData,  Ticket *ticket)
{
    // same as START_RECEIPT
    this->private_setupDynTemplateData_START_RECEIPT(dynTicketData, ticket);
}

void ATBDeviceControllerPlugin::private_setupDynTemplatData_FOOD_STAMP(struct T_dynDat *dynTicketData, Ticket *ticket)
{
    quint8 currentProcessedTemplateNumber = ticket->getCurrentProcessedTemplateNumber();

    // TODO: check DynXList size / or ensure that DynXList has value

    // "Mitarbeiter-Nummer": dynPr1 -> licenceplate
    QString currentEMP_Nr = ticket->getDyn1List().at(currentProcessedTemplateNumber);
    QByteArray ba_licenseplate = codec->fromUnicode(currentEMP_Nr);
    memcpy((char*)dynTicketData->licensePlate, ba_licenseplate.data(), std::min(ba_licenseplate.size(),8));

    // "Lauf.Nr": dynPr2 -> vendingPrice
    QString currentStampNumber = ticket->getDyn2List().at(currentProcessedTemplateNumber);
    QByteArray ba_amount = codec->fromUnicode(currentStampNumber);
    memcpy((char*)dynTicketData->vendingPrice, ba_amount.data(), std::min(ba_amount.size(),8));

    // DEBUG
    qCritical() << "-------------------------------------------------------";
    qCritical() << "private_setupDynTemplatData_FOOD_STAMP()";
    qCritical() << "       currentProcessedTemplateNumber: " << currentProcessedTemplateNumber;
    qCritical() << "                        currentEMP_Nr: " << currentEMP_Nr;
    qCritical() << "                   currentStampNumber: " << currentStampNumber;
    qCritical() << "-------------------------------------------------------";
}



/************************************************************************************************
 * cash payment
 */
void ATBDeviceControllerPlugin::onCashGotCoin()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onGotCoin()";

    this->currentCashState = CASH_STATE::CACHE_INPUT;

    uint32_t amountInt = this->hw->getInsertedAmount();

    QString amountString = QString::number(amountInt);


    emit this->cashInputEvent(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                              nsDeviceControllerInterface::CASH_STATE::CACHE_INPUT,
                              amountString,
                              "",
                              "");
}

void ATBDeviceControllerPlugin::onCashPayStopByPushbutton()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopByPushbutton()";

    // we need new cash value in application...
    QTimer::singleShot(500, this, SLOT(onCashPayStopedSuccess()));

}

void ATBDeviceControllerPlugin::onCashPayStopByMax()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashVendStopByMax()";

    // we need new cash value in application...
    QTimer::singleShot(500, this, SLOT(onCashPayStopedSuccess()));

}

void ATBDeviceControllerPlugin::onCashPayStopByEscrow()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopByEscrow()";

    uint32_t amountInt = this->hw->getInsertedAmount();

    QString amountString = QString::number(amountInt);

    emit this->cashInputFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                              amountString,
                              "",
                              "",
                              "",
                              "",
                              "");
}

void ATBDeviceControllerPlugin::onCashPayStopByError()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopByError()";

    uint32_t amountInt = this->hw->getInsertedAmount();

    QString amountString = QString::number(amountInt);

    emit this->cashInputFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                              amountString,
                              "",
                              "",
                              "",
                              "",
                              "");
}

void ATBDeviceControllerPlugin::onCashPayStopByTimeout()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopByTimeout()";

    uint32_t amountInt = this->hw->getInsertedAmount();

    QString amountString = QString::number(amountInt);

    emit this->cashInputFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                              amountString,
                              "",
                              "",
                              "",
                              "",
                              "");
}

void ATBDeviceControllerPlugin::onCashPayStopedSuccess()
{
    // DEBUG
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopedSuccess()";

    // inserted amount
    uint32_t amountInt = this->hw->getInsertedAmount();
    QString amountString = QString::number(amountInt);

    // inserted coins
    uint32_t amountCoinsInt = CashUtils::getAmountOfInsertedCoins(this->hw);
    QString amountCoinsString = QString::number(amountCoinsInt);

    // inserted notes
    uint32_t amountNotesInt = CashUtils::getAmountOfInsertedNotes(this->hw);
    QString amountNotesString = QString::number(amountNotesInt);

    // amount due to change
    uint32_t amountDueToChangeInt;
    if (amountInt > this->cashStartAmountInt) {
        amountDueToChangeInt = amountInt - this->cashStartAmountInt;
    }
    else {
        amountDueToChangeInt = 0;
    }
    QString amountDueToChangeString = QString::number(amountDueToChangeInt);


    // DEBUG
    qCritical() << "---------------------------------------------------------";
    qCritical() << "ATBDeviceControllerPlugin::onCashPayStopedSuccess()";
    qCritical() << "";
    qCritical() << "                         amountInt: " << amountInt;
    qCritical() << "                      amountString: " << amountString;
    qCritical() << "";
    qCritical() << "                    amountNotesInt: " << amountNotesInt;
    qCritical() << "                 amountNotesString: " << amountNotesString;
    qCritical() << "";
    qCritical() << "                    amountCoinsInt: " << amountCoinsInt;
    qCritical() << "                 amountCoinsString: " << amountCoinsString;
    qCritical() << "";
    qCritical() << "          this->cashStartAmountInt: " << this->cashStartAmountInt;
    qCritical() << "              amountDueToChangeInt: " << amountDueToChangeInt;
    qCritical() << "           amountDueToChangeString: " << amountDueToChangeString;
    qCritical() << "---------------------------------------------------------";


    emit this->cashInputFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                              amountString,
                              amountCoinsString,        // coins
                              amountNotesString,        // notes
                              amountDueToChangeString,  // proposed change
                              "",
                              "");
}

void ATBDeviceControllerPlugin::onCashChangerState()
{
    uint32_t amountThatCouldNotBeChangedInt;

    static int changerStateRequestCounter = 0;
    static uint8_t lastChangerResult = 0;


    // inserted amount
    uint32_t amountInt = this->hw->getInsertedAmount();
    QString amountString = QString::number(amountInt);

    // inserted coins
    uint32_t amountCoinsInt = CashUtils::getAmountOfInsertedCoins(this->hw);
    QString amountCoinsString = QString::number(amountCoinsInt);

    // inserted notes
    uint32_t amountNotesInt = CashUtils::getAmountOfInsertedNotes(this->hw);
    QString amountNotesString = QString::number(amountNotesInt);

    // amount due to change
    uint32_t amountCoinsChangedInt;
    if (amountInt > this->cashStartAmountInt) {
        amountCoinsChangedInt = amountInt - this->cashStartAmountInt;
    }
    else {
        amountCoinsChangedInt = 0; 
    }
    QString amountCoinsChangedString = QString::number(amountCoinsChangedInt);

    // if we do not need to give change:
    if (amountCoinsChangedInt == 0) {
        emit this->cashPaymentFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                                  amountString,
                                  amountCoinsString,        // coins
                                  amountNotesString,        // notes
                                  amountCoinsChangedString, // change
                                  "",
                                  "");
        changerStateRequestCounter = 0;
        lastChangerResult = 0;
        return;
    }


    // get changer state ------------------------------------------------
    // Note: 'returnedAmount'-parameter is missleading here!
    // 'returnedAmount' is the amount which could not be changed!

    lastChangerResult = hw->changer_getChangeResult(&amountThatCouldNotBeChangedInt);

    // DEBUG
    qCritical() << "---------------------------------------------------------";
    qCritical() << "ATBDeviceControllerPlugin::onCashChangerState()";
    qCritical() << "        changerStateRequestCounter: " << changerStateRequestCounter;
    qCritical() << "                 lastChangerResult: " << lastChangerResult;
    qCritical() << "    amountThatCouldNotBeChangedInt: " << amountThatCouldNotBeChangedInt;
    qCritical() << "";
    qCritical() << "                         amountInt: " << amountInt;
    qCritical() << "                      amountString: " << amountString;
    qCritical() << "";
    qCritical() << "                    amountCoinsInt: " << amountCoinsInt;
    qCritical() << "                 amountCoinsString: " << amountCoinsString;
    qCritical() << "";
    qCritical() << "                    amountNotesInt: " << amountNotesInt;
    qCritical() << "                 amountNotesString: " << amountNotesString;
    qCritical() << "";
    qCritical() << "          this->cashStartAmountInt: " << this->cashStartAmountInt;
    qCritical() << "             amountCoinsChangedInt: " << amountCoinsChangedInt;
    qCritical() << "          amountCoinsChangedString: " << amountCoinsChangedString;
    qCritical() << "---------------------------------------------------------";

    if (lastChangerResult == 1) { // change is returned


        QString amountCoinsChangedString = QString::number(amountCoinsChangedInt);

        emit this->cashPaymentFinished(nsDeviceControllerInterface::RESULT_STATE::SUCCESS,
                                  amountString,
                                  amountCoinsString,        // coins
                                  amountNotesString,        // notes
                                  amountCoinsChangedString, // change
                                  "",
                                  "");
        changerStateRequestCounter = 0;
        lastChangerResult = 0;
        return;
    }
    else
    if (lastChangerResult == 0) { // not yet started
        qCritical() << "ATBDeviceControllerPlugin::onCashChangerState(): ERROR: change not yet started: amount due to return: " << amountCoinsChangedString;
    }
    else
    if (lastChangerResult == 2) { // only partial return
        qCritical() << "ATBDeviceControllerPlugin::onCashChangerState(): ERROR: only partial return: amount due to return: " << amountCoinsChangedString;
    }
    else
    if (lastChangerResult == 3) { // no return possible
        qCritical() << "ATBDeviceControllerPlugin::onCashChangerState(): ERROR: no return possible: amount due to return: " << amountCoinsChangedString;
    }
    else {
        qCritical() << "ATBDeviceControllerPlugin::onCashChangerState(): ERROR: invalid changerState (" << lastChangerResult << ")";
    }


    // handle timeout ------------------------------------------------
    if (changerStateRequestCounter > 15) {
        QString errorCode;
        QString errorDescription;
        switch (lastChangerResult) {
        case 0:  // not yet started
            errorCode = "DC::CHANGER::START";
            errorDescription = "Changer does not start";
            break;
        case 1:  // amount returned
            // This error should not occur!
            errorCode = "DC::CHANGER::INVALID";
            errorDescription = "Changer returned amount";
            break;
        case 2:  // only partial return
            errorCode = "DC::CHANGER::CHANGE";
            errorDescription = "Changer does only partial return";
            break;
        case 3:  // no return possible
            errorCode = "DC::CHANGER::CHANGE_NOT_POSSIBLE";
            errorDescription = "Changing not possible";
            break;
        default:

            break;
        }
        emit this->cashPaymentFinished(nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND,
                                  amountString,
                                  amountCoinsString,
                                  amountNotesString,
                                  0,
                                  errorCode,
                                  errorDescription);
        changerStateRequestCounter = 0;
        lastChangerResult = 0;
        return;
    }

    // restart changer check:
    changerStateRequestCounter++;
    QTimer::singleShot(1000, this, &ATBDeviceControllerPlugin::onCashChangerState);
}




/**
 * Load CashAgentLib
 * @brief ATBDeviceControllerPlugin::private_loadCashAgentLib
 * @param pluginName
 * @return
 */
bool ATBDeviceControllerPlugin::private_loadCashAgentLib(QString pluginName)
{
    if (pluginName == "") {

        // search list for plugin (.so) file:
        QStringList pluginNameList;
        pluginNameList << "/usr/lib/libCAslave.so"
                       << "/usr/lib/libCAmaster.so"
                       << "/usr/lib/libCashAgentLib.so";
        // using C++11 range based loop:
        for (const auto& filename : pluginNameList) {
            if (QFileInfo(filename).isReadable()) {
                pluginName = filename;
                break;
            }
        }

        if (pluginName == "") {
            qCritical() << "ATBDeviceControllerPlugin: CashAgentLib not installed!";
            this->errorCode = "CashAgentLib::NOT_FOUND";
            this->errorDescription = "ERROR: no CashAgentLib: ";
            return false;
        }

    }

    if (!QLibrary::isLibrary(pluginName)) {
        qCritical() << "ATBDeviceControllerPlugin: can not load CashAgentLib: " << pluginName;
        this->errorCode = "CashAgentLib::NO_LIBRARY";
        this->errorDescription = "ERROR: can not load CashAgentLib: " + pluginName;
        return false;
    }

    if (pluginName.contains("slave", Qt::CaseInsensitive)) {
        this->isMaster = false;
    }
    else
    if (pluginName.contains("master", Qt::CaseInsensitive)) {
        this->isMaster = true;
    }

    QPluginLoader* pluginLoader = new QPluginLoader();
    pluginLoader->setFileName(pluginName);

    QObject* plugin = pluginLoader->instance();
    if (!pluginLoader->isLoaded()) {
        qCritical() << "ATBDeviceControllerPlugin: can not instantiate CashAgentLib: " << pluginName;
        qCritical() << "               error: " << pluginLoader->errorString();
        this->errorCode = "CashAgentLib::NO_INSTANCE";
        this->errorDescription = "ERROR: can not instantiate CashAgentLib: " + pluginName;
        return false;
    }

    if (plugin == nullptr) {
        qCritical() << "ATBDeviceControllerPlugin: plugin is NULL";
        this->errorCode = "CashAgentLib::INSTANCE_IS_NULL";
        this->errorDescription = "ERROR: CashAgentLib instance is NULL: " + pluginName;
    }

    qCritical() << "ATBDeviceControllerPlugin: instantiate CashAgentLib: " << pluginName;

    this->hw = qobject_cast<hwinf*>(plugin);

    if (this->hw == nullptr) {
        qCritical() << "ATBDeviceControllerPlugin: hw is NULL";
        this->errorCode = "CashAgentLib::HW_IS_NULL";
        this->errorDescription = "ERROR: CashAgentLib object_cast is NULL: " + pluginName;
        return false;
    }

    qCritical() << "ATBDeviceControllerPlugin: loaded CashAgentLib";

    if (this->isMaster) {
        QTimer::singleShot(500, this, &ATBDeviceControllerPlugin::startPhysicalLayer);
    }

    return true;
}





/***********************************************************************************************
 *  dbus
 */
int ATBDeviceControllerPlugin::init_sc_dbus()
{
#if defined (ARCH_PTU4)
    this->dbus = new DBusControllerInterface("eu.atb.ptu", "/systemcontrol", QDBusConnection::systemBus(), 0);
#elif defined (ARCH_PTU5)
    this->dbus = new DBusControllerInterface("eu.atb.ptu.systemcontrol", "/systemcontrol", QDBusConnection::systemBus(), 0);
#else
    this->dbus = new DBusControllerInterface("eu.atb.ptu", "/systemcontrol", QDBusConnection::sessionBus(), 0);
#endif
    if (!dbus->isValid()) {
        QString errorString = QDBusError::errorString(dbus->lastError().type());
        qCritical() << errorString;

        if (dbus->lastError().isValid()){
            qCritical() << "last error is valid.";
        }

        qCritical() << "message: " << dbus->lastError().message();
        qCritical() << "SystemController is not valid.";
        return 0;
    }

    if (!dbus->connection().isConnected()) {
        qCritical() << "SystemController is not connected.";
        return 0;
    }

    connect(this->dbus, SIGNAL(wokeUpFrom(uchar)), this, SLOT(onWokeUp(uchar)));

    return 1;
}

void ATBDeviceControllerPlugin::onWokeUp(uchar source)
{
    if (source == 0x01) {
        // woke up from device controller
        this->diag->diagRequest();
    }
}


/************************************************************************************************
 * Mandatory plugin methods
 *
 */

PLUGIN_STATE ATBDeviceControllerPlugin::getState()
{
    return this->pluginState;
}

QString & ATBDeviceControllerPlugin::getLastError()
{
    return this->errorCode;
}

const QString & ATBDeviceControllerPlugin::getLastErrorDescription()
{
    return this->errorDescription;
}

const QString & ATBDeviceControllerPlugin::getPluginInfo()
{
    return this->pluginInfo;
}


const QString ATBDeviceControllerPlugin::getString(nsDeviceControllerInterface::RESULT_STATE resultState)
{
    QString str;

    switch (resultState) {
    case nsDeviceControllerInterface::RESULT_STATE::SUCCESS:
        str = QString("RESULT_STATE::SUCCESS");
        break;
    case nsDeviceControllerInterface::RESULT_STATE::ERROR_BACKEND:
        str = QString("RESULT_STATE::ERROR_BACKEND");
        break;
    case nsDeviceControllerInterface::RESULT_STATE::ERROR_TIMEOUT:
        str = QString("RESULT_STATE::ERROR_TIMEOUT");
        break;
    case nsDeviceControllerInterface::RESULT_STATE::ERROR_PROCESS:
        str = QString("RESULT_STATE::ERROR_PROCESS");
        break;
    case nsDeviceControllerInterface::RESULT_STATE::ERROR_RETRY:
        str = QString("RESULT_STATE::ERROR_RETRY");
        break;
    case nsDeviceControllerInterface::RESULT_STATE::INFO:
        str = QString("RESULT_STATE::INFO");
        break;
    }
    return str;

}



/************************************************************************************************
 * ... end
 */

#if QT_VERSION < 0x050000
Q_EXPORT_PLUGIN2( ATBDeviceControllerPlugin, ATBDeviceControllerPlugin )
#endif