/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2017 Statoil ASA
//
//  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 "RifcCommandFileReader.h"

#include "RicfCommandObject.h"
#include "RicfMessages.h"
#include "RicfObjectCapability.h"

#include "cafPdmObjectFactory.h"

#include <QTextStream>

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<RicfCommandObject*> RicfCommandFileReader::readCommands( QTextStream&           inputStream,
                                                                     caf::PdmObjectFactory* objectFactory,
                                                                     RicfMessages*          errorMessageContainer )
{
    std::vector<RicfCommandObject*> readCommands;

    while ( !inputStream.atEnd() )
    {
        errorMessageContainer->skipWhiteSpaceWithLineNumberCount( inputStream );
        // Read command name
        QString commandName;
        {
            errorMessageContainer->skipWhiteSpaceWithLineNumberCount( inputStream );
            while ( !inputStream.atEnd() )
            {
                QChar currentChar = errorMessageContainer->readCharWithLineNumberCount( inputStream );

                if ( currentChar == QChar( '#' ) )
                {
                    errorMessageContainer->skipLineWithLineNumberCount( inputStream );
                    errorMessageContainer->skipWhiteSpaceWithLineNumberCount( inputStream );
                    currentChar = QChar();
                }
                else if ( currentChar.isSpace() )
                {
                    errorMessageContainer->skipWhiteSpaceWithLineNumberCount( inputStream );
                    QChar isBracket( 'a' );
                    isBracket = errorMessageContainer->readCharWithLineNumberCount( inputStream );
                    if ( isBracket != QChar( '(' ) )
                    {
                        // Error, could not find start bracket for command
                        errorMessageContainer->addError( "Could not find start bracket for command " + commandName );

                        return readCommands;
                    }
                    break;
                }
                else if ( currentChar == QChar( '(' ) )
                {
                    break;
                }

                if ( !currentChar.isNull() )
                {
                    commandName += currentChar;
                }
            }
        }

        if ( commandName.isEmpty() && inputStream.atEnd() )
        {
            // Read past the last command
            break;
        }

        CAF_ASSERT( objectFactory );
        caf::PdmObjectHandle* obj  = objectFactory->create( commandName );
        RicfCommandObject*    cObj = dynamic_cast<RicfCommandObject*>( obj );

        if ( cObj == nullptr )
        {
            errorMessageContainer->addError( "The command: \"" + commandName + "\" does not exist." );

            // Error: Unknown command
            // Skip to end of command
            QChar currentChar;
            bool  isOutsideQuotes = true;
            while ( !inputStream.atEnd() )
            {
                currentChar = errorMessageContainer->readCharWithLineNumberCount( inputStream );
                if ( isOutsideQuotes )
                {
                    if ( currentChar == QChar( ')' ) )
                    {
                        break;
                    }
                    if ( currentChar == QChar( '\"' ) )
                    {
                        isOutsideQuotes = false;
                    }
                }
                else
                {
                    if ( currentChar == QChar( '\"' ) )
                    {
                        isOutsideQuotes = true;
                    }

                    if ( currentChar == QChar( '\\' ) )
                    {
                        currentChar = errorMessageContainer->readCharWithLineNumberCount( inputStream );
                    }
                }
            }
        }
        else
        {
            readCommands.push_back( cObj );
            auto rcfCap                           = cObj->capability<RicfObjectCapability>();
            errorMessageContainer->currentCommand = commandName;
            rcfCap->readFields( inputStream, objectFactory, errorMessageContainer );
            errorMessageContainer->currentCommand = "";
        }
    }

    return readCommands;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RicfCommandFileReader::writeCommands( QTextStream&                           outputStream,
                                           const std::vector<RicfCommandObject*>& commandsToWrite )
{
    for ( const auto& cmdObj : commandsToWrite )
    {
        auto rcfCap = cmdObj->capability<RicfObjectCapability>();
        if ( !rcfCap ) continue;

        outputStream << cmdObj->classKeyword();
        outputStream << "(";

        rcfCap->writeFields( outputStream );

        outputStream << ")";
    }
}