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#include "SerialHelper.h"

SerialHelper::SerialHelper(QObject *parent) : QObject(parent)

{

    connected = false;

    speeds << "9600" << "19200" << "38400" << "57600" << "115200" << "230400" << "250000";

    dataBits << "8 Bits" << "7 Bits" << "6 Bits" << "5 Bits";

    stopBits << "1 Bit" << "1.5 Bits" << "2 Bits";

    parity << "None" << "Even" << "Odd" << "Space" << "Mark";

    flowControl << "None" << "Hardware" << "Software";

}

SerialHelper::~SerialHelper()

{

    serialPort->close();

    delete serialPort;

}

void SerialHelper::Serial_QueryParameters()

{

    QList<QSerialPortInfo> portsList = QSerialPortInfo::availablePorts();

    QStringList ports;

    for (int i = 0; i < portsList.size(); i++) {

        ports.append(portsList[i].portName());

    }

    emit Serial_UpdateParameters(ports, speeds, dataBits, stopBits, parity, flowControl);

}

void SerialHelper::Serial_Connect(QString port, QString speed, QString dataBits,

                            QString stopBits, QString parity, QString flowControl)

{

    if (!connected) {

        emit UpdateStatus("Connecting to " + port);

        serialPort = new QSerialPort();

        connect(serialPort, SIGNAL(readyRead()), this, SLOT(Serial_ProcessIncomingData()));

        connect(serialPort, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(Serial_ProcessError(QSerialPort::SerialPortError)));

        serialPort->setPortName(port);

        if (serialPort->open(QIODevice::ReadWrite)) {

            connected = true;

            bool ok = false;

            int baud = speed.toInt(&ok);

            if (ok) serialPort->setBaudRate(baud);

            if (dataBits == "5 Bits")

                serialPort->setDataBits(QSerialPort::Data5);

            else if (dataBits == "6 Bits")

                serialPort->setDataBits(QSerialPort::Data6);

            else if (dataBits == "7 Bits")

                serialPort->setDataBits(QSerialPort::Data7);

            else

                serialPort->setDataBits(QSerialPort::Data8);

            if (stopBits == "1.5 Bits")

                serialPort->setStopBits(QSerialPort::OneAndHalfStop);

            else if (stopBits == "2 Bits")

                serialPort->setStopBits(QSerialPort::TwoStop);

            else

                serialPort->setStopBits(QSerialPort::OneStop);

            if (parity == "Even")

                serialPort->setParity(QSerialPort::EvenParity);

            else if (parity == "Odd")

                serialPort->setParity(QSerialPort::OddParity);

            else if (parity == "Space")

                serialPort->setParity(QSerialPort::SpaceParity);

            else if (parity == "Mark")

                serialPort->setParity(QSerialPort::MarkParity);

            else

                serialPort->setParity(QSerialPort::NoParity);

            if (flowControl == "Hardware")

                serialPort->setFlowControl(QSerialPort::HardwareControl);

            else if (flowControl == "Software")

                serialPort->setFlowControl(QSerialPort::SoftwareControl);

            else

                serialPort->setFlowControl(QSerialPort::NoFlowControl);

            // See http://umforum.ultimaker.com/index.php?/topic/5886-um2-controller-resetreboot-when-opening-usb-port-on-linux/

            serialPort->setDataTerminalReady(1);

            if (ok) {

                QString status = "Connected (%1 @ %2 D: %3 S: %4 P: %5 FC: %6)";

                emit UpdateStatus(status.arg(port).arg(speed).arg(dataBits).arg(stopBits).arg(parity).arg(flowControl));

                emit Serial_Connected();

            } else

                Serial_Disconnect();

        }

    }

}

void SerialHelper::Serial_Disconnect(bool errored)

{

    serialPort->disconnect();

    serialPort->close();

    delete serialPort;

    connected = false;

    if (!errored)

        emit UpdateStatus("Disconnected");

    emit Serial_Disconnected();

}

void SerialHelper::Serial_TransmitString(QString string)

{

    serialPort->write(string.toStdString().c_str());

    serialPort->write(SERIAL_NEWLINE_CHAR);

}

void SerialHelper::Serial_TransmitByteArray(QByteArray data)

{

    serialPort->write(data);

}

void SerialHelper::Serial_ProcessIncomingData()

{

    char tmpBuffer[SERIAL_BUFFER_SIZE];

    int len = serialPort->read(tmpBuffer, sizeof(tmpBuffer));

    while (len > 0) {

        for (int i = 0; i < len; i++) {

            emit Serial_ReceivedByte(tmpBuffer[i]);

        }

        // Check if there is more data to be read from the serial port

        len = serialPort->read(tmpBuffer, sizeof(tmpBuffer));

    }

}

void SerialHelper::Serial_ProcessError(QSerialPort::SerialPortError error)

{

    if (error == QSerialPort::NoError) return;

    switch(error) {

        case QSerialPort::DeviceNotFoundError:

            emit UpdateStatus("(Error) Device not found");

            return;

        case QSerialPort::PermissionError:

            emit UpdateStatus("(Error) Device already opened or lacking permission");

            return;

        case QSerialPort::OpenError:

            emit UpdateStatus("(Error) Device already opened");

            return;

        case QSerialPort::NotOpenError:

            emit UpdateStatus("(Error) Device not opened");

            return;

        case QSerialPort::ParityError:

            emit UpdateStatus("(Error) Parity error detected");

            break;

        case QSerialPort::FramingError:

            emit UpdateStatus("(Error) Framing error detected");

            break;

        case QSerialPort::BreakConditionError:

            emit UpdateStatus("(Error) Break condition detected");

            break;

        case QSerialPort::WriteError:

            emit UpdateStatus("(Error) Unable to write to device");

            break;

        case QSerialPort::ReadError:

            emit UpdateStatus("(Error) Unable to read from device");

            break;

        case QSerialPort::ResourceError:

            emit UpdateStatus("(Error) Device missing or disconnected");

            break;

        case QSerialPort::UnsupportedOperationError:

            emit UpdateStatus("(Error) Operation not supported or prohibited");

            break;

        case QSerialPort::TimeoutError:

            emit UpdateStatus("(Error) Connection timeout");

            break;

        case QSerialPort::UnknownError:

            emit UpdateStatus("(Error) Unknown error");

            break;

        default:

            break;

    }

    serialPort->clearError();

    Serial_Disconnect(true);

}