#include "ModbusMaster.h"
#include <QModbusTcpClient>
#include <QModbusRtuSerialMaster>
#include <qdebug.h>
#include "QtConcurrent/QtConcurrent"
#include "SerialportException.h"
enum { NumColumn = 0, CoilsColumn = 1, HoldingColumn = 2, ColumnCount = 3, RowCount = 10 };
modBusMaster::modBusMaster(QObject *parent) : QObject(parent)
{


}

void modBusMaster::init()
{

    close();
    modbusDevice = nullptr;

    modbusDevice = new QModbusRtuSerialMaster(this);
    connect(modbusDevice, &QModbusClient::errorOccurred, [this](QModbusDevice::Error)
    {
        throw serialPortException(modbusDevice->errorString());
    });
    
    if (!modbusDevice)
        throw serialPortException("Could not create Modbus master.");

}

void modBusMaster::open(QString serialPort , int slaveAddress)
{

    _serialPort = serialPort;
    _slaveAddress = slaveAddress;
    if (!modbusDevice)
        return;
    if (modbusDevice->state() != QModbusDevice::ConnectedState)
    {
        modbusDevice->setConnectionParameter(QModbusDevice::SerialPortNameParameter,
                                             serialPort);
        modbusDevice->setConnectionParameter(QModbusDevice::SerialParityParameter,
                                             _modbusSettings.modbusSetting.parity);
        modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
                                             _modbusSettings.modbusSetting.baud);
        modbusDevice->setConnectionParameter(QModbusDevice::SerialDataBitsParameter,
                                             _modbusSettings.modbusSetting.dataBits);
        modbusDevice->setConnectionParameter(QModbusDevice::SerialStopBitsParameter,
                                             _modbusSettings.modbusSetting.stopBits);
        modbusDevice->setTimeout(_modbusSettings.modbusSetting.responseTime);
        modbusDevice->setNumberOfRetries(_modbusSettings.modbusSetting.numberOfRetries);
        emit modbusConnectionState(true);
    }
    if (!modbusDevice->connectDevice())
    {
        throw serialPortException(modbusDevice->errorString());
    }
}
void modBusMaster::close()
{
    if (modbusDevice)
        modbusDevice->disconnectDevice();
    delete modbusDevice;
}

void modBusMaster::stop()
{
    if (modbusDevice)
        modbusDevice->disconnectDevice();
    emit modbusConnectionState(false);
}

void modBusMaster::setSingleCoil(int startAddress,bool coilFlag)
{
    if (!modbusDevice)
        return;
    _coilFlags.setBit(0,coilFlag);
    writeRequest(QModbusDataUnit::RegisterType::Coils,  startAddress, 1);

}

void modBusMaster::setMultipleCoil(int startAddress, quint16 writeSize, QBitArray coilFlags)
{
    if (!modbusDevice)
        return;
    _coilFlags = coilFlags;
    writeRequest(QModbusDataUnit::RegisterType::Coils,  startAddress, writeSize);
}

void modBusMaster::setSingleRegister(int startAddress,  quint16 registerValue)
{
    if (!modbusDevice)
        return;
    _registerValues[0]=registerValue;
    writeRequest(QModbusDataUnit::RegisterType::HoldingRegisters,  startAddress, 1);
}

void modBusMaster::setMultipleRegister(int startAddress, quint16 writeSize , QVector<quint16> registerValues)
{
    if (!modbusDevice)
        return;
    _registerValues = registerValues;
    writeRequest(QModbusDataUnit::RegisterType::HoldingRegisters,  startAddress, writeSize);
}



QBitArray modBusMaster::getCoil(int startAddress, quint16 readSize)
{
     qDebug() << " QThread::currentThreadId() getCoil befor" <<QThread::currentThreadId() ;
    QModbusDataUnit unit = readRequest(QModbusDataUnit::RegisterType::Coils,  startAddress, readSize);
    qDebug() << " QThread::currentThreadId() getCoil after" <<QThread::currentThreadId() ;
    mutex.lock();
    if(!freeThread)
        modBusAnswerNotReady.wait(&mutex);
    mutex.unlock();



    QBitArray coils;
    coils.resize(2);
    auto num = unit.valueCount();
    coils.resize(static_cast<int>(num));
    for (uint i = 0; i < unit.valueCount(); i++)
    {
        coils.setBit((unit.value(i)));
    }



    return coils ;



}

QBitArray modBusMaster::getInputCoil(int startAddress, quint16 readSize)
{

    QModbusDataUnit unit = readRequest(QModbusDataUnit::RegisterType::DiscreteInputs,  startAddress, readSize);
    QBitArray coils;
    coils.resize(2);
    auto num = unit.valueCount();
    coils.resize(static_cast<int>(num));
    for (uint i = 0; i < unit.valueCount(); i++)
    {
        coils.setBit((unit.value(i)));
    }
    return coils ;
}

QVector<quint16>  modBusMaster::getInputRegister(int startAddress, quint16 readSize)
{

    QModbusDataUnit unit = readRequest(QModbusDataUnit::RegisterType::InputRegisters,  startAddress, readSize);
    QVector<quint16> registerValues;
    registerValues.resize(2);
    auto num = unit.valueCount();
    registerValues.resize(static_cast<int>(num));
    for (uint i = 0; i < unit.valueCount(); i++)
    {
        registerValues[i]=unit.value(i);
    }
    return registerValues ;
}

QVector<quint16>  modBusMaster::getHoldingRegister(int startAddress, quint16 readSize)
{
    // if (!modbusDevice)
    // return;
    QModbusDataUnit unit = readRequest(QModbusDataUnit::RegisterType::HoldingRegisters, startAddress, readSize);
    QVector<quint16> registerValues;
    registerValues.resize(2);
    auto num = unit.valueCount();
    registerValues.resize(static_cast<int>(num));
    for (uint i = 0; i < unit.valueCount(); i++)
    {
        registerValues[i]=unit.value(i);
    }
    return registerValues ;
}


QModbusDataUnit  modBusMaster::readRequest(QModbusDataUnit::RegisterType registerType, int startAddress, quint16 readSize)
{
    qDebug() << " QThread::currentThreadId() readRequest1" <<QThread::currentThreadId() ;
    auto table =registerType;
    if (auto *reply =modbusDevice->sendReadRequest(QModbusDataUnit(table, startAddress, readSize), _slaveAddress))
    {
        QFuture<void> future = QtConcurrent::run([this, reply]() {
            qDebug() << " QThread::currentThreadId() inside worker thread" <<QThread::currentThreadId() ;
            //   while(!reply->isFinished())
            //     {
            //        qDebug() << "reply->isFinished() " << reply->isFinished();
            //      qDebug() << "Hello from thread " << QThread::currentThread();
            //   }


            if (!reply->isFinished())
            {
                qDebug() << " QThread::currentThreadId() inside worker thread isFinished" <<QThread::currentThreadId() ;
                qDebug() << "1reply->isFinished() " << reply->isFinished();
                connect(reply, &QModbusReply::finished, this, &modBusMaster::modbusReplyRecieved);
                qDebug() << "2reply->isFinished() " << reply->isFinished();
            }



        });
        qDebug() << " QThread::currentThreadId() readRequest3" <<QThread::currentThreadId() ;
        //   freeThread=true;

        if(!checkForError(reply))
        {
            const QModbusDataUnit unit = reply->result();
            return unit;
        }


    }
    else
    {
        throw serialPortException(modbusDevice->errorString());

    }

    reply->deleteLater();
}
bool modBusMaster::checkForError(QModbusReply *_reply)
{
    if (_reply->error() == QModbusDevice::NoError)
    {
        return  false;

    } else if (_reply->error() == QModbusDevice::ProtocolError)
    {
        throw serialPortException(tr("Read response error: %1 (Mobus exception: 0x%2)").
                                  arg(reply->errorString()).
                                  arg(reply->rawResult().exceptionCode(), -1, 16));
    } else {
        throw serialPortException(tr("Read response error: %1 (code: 0x%2)").
                                  arg(reply->errorString()).
                                  arg(reply->error(), -1, 16));
    }

}

void modBusMaster::modbusReplyRecieved()
{
   qDebug() << " QThread::currentThreadId() inside slot" <<QThread::currentThreadId() ;
    // auto reply = qobject_cast<QModbusReply *>(sender());
    // if (!reply)
    //     return;

    // modbusReplyFromClient = reply;
    freeThread=true;
    mutex.lock();
    if (freeThread)
        modBusAnswerNotReady.wakeAll();
    mutex.unlock();

    //  reply->deleteLater();

}

void modBusMaster::writeRequest(QModbusDataUnit::RegisterType registerType, int startAddress, quint16 writeSize)
{
    qDebug() << " ---- setSingleCoil coilFlag writeRequest ";
    auto table =registerType;
    Q_ASSERT(startAddress >= 0 && startAddress < 10);
    QModbusDataUnit writeUnit = QModbusDataUnit(table, startAddress, writeSize);
    qDebug() << " ---- writeUnit.valueCount()" << writeUnit.valueCount();
    for (int i = 0; i < writeUnit.valueCount(); i++) {
        if (table == QModbusDataUnit::Coils)
            writeUnit.setValue(i,  _coilFlags[i + writeUnit.startAddress()]);
        else
            writeUnit.setValue(i, _registerValues[i + writeUnit.startAddress()]);
    }

    if (auto *reply = modbusDevice->sendWriteRequest(writeUnit, _slaveAddress)) {

        QFuture<void> future = QtConcurrent::run([this, reply]() {
            while(!reply->isFinished())
            {
                qDebug() << "reply->isFinished() " << reply->isFinished();
            }
            qDebug() << "reply->isFinished() after " << reply->isFinished();
            if(!checkForError(reply))
            {
                const QModbusDataUnit unit = reply->result();

            }
        });
        // future.waitForFinished();

        // if (!reply->isFinished()) {
        //   connect(reply, &QModbusReply::finished, this, [reply]() {
        //     if (reply->error() == QModbusDevice::ProtocolError) {
        //         throw serialPortException(tr("Write response error: %1 (Mobus exception: 0x%2)")
        //                                   .arg(reply->errorString()).arg(reply->rawResult().exceptionCode(), -1, 16));
        //   } else if (reply->error() != QModbusDevice::NoError) {
        //      throw serialPortException(tr("Write response error: %1 (code: 0x%2)").
        //                                   arg(reply->errorString()).arg(reply->error(), -1, 16));

        //   }
        //      reply->deleteLater();
        // });
        //   } else {
        //reply->deleteLater();
        //}
        qDebug() << " ---- sreply reply  "<< reply->error();
    } else {
        throw serialPortException(tr("Write error: ") + modbusDevice->errorString());
    }

}