/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) Statoil ASA
//  Copyright (C) Ceetron Solutions AS
//
//  ResInsight is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
//
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#include "RiaSocketDataTransfer.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RiaSocketDataTransfer::writeBlockDataToSocket( QTcpSocket*  socket,
                                                    const char*  data,
                                                    quint64      bytesToWrite,
                                                    QStringList& errorMessages )
{
    quint64 bytesWritten = 0;

    quint64 maxBlockSize = maximumValueCountInBlock() * sizeof( double );

    while ( bytesWritten < bytesToWrite )
    {
        quint64 byteCountToWrite = qMin( bytesToWrite - bytesWritten, maxBlockSize );

        qint64 actuallyBytesWritten = socket->write( data + bytesWritten, byteCountToWrite );
        if ( actuallyBytesWritten < 0 )
        {
            errorMessages.push_back( "Error detected when writing data, error string from socket" );
            errorMessages.push_back( socket->errorString() );

            return false;
        }

        bytesWritten += actuallyBytesWritten;
    }

    return true;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RiaSocketDataTransfer::readBlockDataFromSocket( QTcpSocket* socket, char* data, quint64 bytesToRead, QStringList& errorMessages )
{
    quint64 bytesRead = 0;

    quint64 maxBlockSize = maximumValueCountInBlock() * sizeof( double );

    while ( bytesRead < bytesToRead )
    {
        if ( socket->bytesAvailable() )
        {
            quint64 byteCountToRead = bytesToRead - bytesRead;
            byteCountToRead         = qMin( byteCountToRead, maxBlockSize );

            qint64 actuallyBytesRead = socket->read( data + bytesRead, byteCountToRead );
            if ( actuallyBytesRead < 0 )
            {
                errorMessages.push_back( "Error detected when reading data, error string from socket" );
                errorMessages.push_back( socket->errorString() );

                return false;
            }

            bytesRead += actuallyBytesRead;

#ifdef octave_oct_h
            // octave_stdout << "Byte read " << bytesRead << " of a total of "<< bytesToRead << "\n";
#endif
        }
        else
        {
            if ( !socket->waitForReadyRead() )
            {
                errorMessages.push_back( "Waited for data for %1 milli seconds." );
                errorMessages.push_back( socket->errorString() );

                return false;
            }
        }

        // Allow Octave process to end a long running Octave function
#ifdef octave_oct_h
        OCTAVE_QUIT;
#endif
    }

    return true;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
size_t RiaSocketDataTransfer::maximumValueCountInBlock()
{
    return 20000;
}