/////////////////////////////////////////////////////////////////////////////////
//
//  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 "ExpressionParser.h"

#include "ExpressionParserImpl.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
ExpressionParser::ExpressionParser()
{
    m_expressionParserImpl = std::unique_ptr<ExpressionParserImpl>( new ExpressionParserImpl );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
ExpressionParser::~ExpressionParser()
{
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::vector<QString> ExpressionParser::detectReferencedVariables( const QString& expression )
{
    return ExpressionParserImpl::detectReferencedVariables( expression );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void ExpressionParser::assignVector( const QString& variableName, std::vector<double>& vector )
{
    m_expressionParserImpl->assignVector( variableName, vector );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::expected<void, QString> ExpressionParser::evaluate( const QString& expressionText )
{
    return m_expressionParserImpl->evaluate( expressionText );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::expected<void, QString> ExpressionParser::expandIfStatementsAndEvaluate( const QString& expressionText )
{
    if ( expressionText.contains( "if", Qt::CaseInsensitive ) )
    {
        QString expanded = ExpressionParserImpl::expandIfStatements( expressionText );
        return m_expressionParserImpl->evaluate( expanded );
    }

    return m_expressionParserImpl->evaluate( expressionText );
}