/////////////////////////////////////////////////////////////////////////////////
//
//  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 "RifEnsembleStatisticsReader.h"

#include "RimEnsembleCurveSet.h"
#include "RimEnsembleStatisticsCase.h"
#include "RimSummaryCaseCollection.h"

static const std::vector<time_t> EMPTY_TIME_STEPS_VECTOR;

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
RifEnsembleStatisticsReader::RifEnsembleStatisticsReader( RimEnsembleStatisticsCase* ensStatCase )
{
    CVF_ASSERT( ensStatCase );

    m_ensembleStatCase = ensStatCase;

    m_allResultAddresses = std::set<RifEclipseSummaryAddress>(
        { RifEclipseSummaryAddress::ensembleStatisticsAddress( ENSEMBLE_STAT_P10_QUANTITY_NAME, "" ),
          RifEclipseSummaryAddress::ensembleStatisticsAddress( ENSEMBLE_STAT_P50_QUANTITY_NAME, "" ),
          RifEclipseSummaryAddress::ensembleStatisticsAddress( ENSEMBLE_STAT_P90_QUANTITY_NAME, "" ),
          RifEclipseSummaryAddress::ensembleStatisticsAddress( ENSEMBLE_STAT_MEAN_QUANTITY_NAME, "" ) } );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
const std::vector<time_t>& RifEnsembleStatisticsReader::timeSteps( const RifEclipseSummaryAddress& resultAddress ) const
{
    if ( !validateAddress( resultAddress ) ) return EMPTY_TIME_STEPS_VECTOR;
    return m_ensembleStatCase->timeSteps();
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RifEnsembleStatisticsReader::values( const RifEclipseSummaryAddress& resultAddress, std::vector<double>* values ) const
{
    if ( !validateAddress( resultAddress ) ) return false;

    const std::vector<double>* sourceData   = nullptr;
    auto                       quantityName = resultAddress.ensembleStatisticsQuantityName();

    if ( quantityName == ENSEMBLE_STAT_P10_QUANTITY_NAME )
        sourceData = &m_ensembleStatCase->p10();
    else if ( quantityName == ENSEMBLE_STAT_P50_QUANTITY_NAME )
        sourceData = &m_ensembleStatCase->p50();
    else if ( quantityName == ENSEMBLE_STAT_P90_QUANTITY_NAME )
        sourceData = &m_ensembleStatCase->p90();
    else if ( quantityName == ENSEMBLE_STAT_MEAN_QUANTITY_NAME )
        sourceData = &m_ensembleStatCase->mean();

    if ( !sourceData ) return false;

    values->clear();
    values->reserve( sourceData->size() );
    for ( auto val : *sourceData )
        values->push_back( val );
    return true;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
std::string RifEnsembleStatisticsReader::unitName( const RifEclipseSummaryAddress& resultAddress ) const
{
    std::string retval;

    // The stat case does not have a unit set, so pick up the unit from one of the input cases, if possible
    auto cases = m_ensembleStatCase->curveSet()->summaryCaseCollection()->allSummaryCases();
    if ( cases.size() > 0 )
    {
        // get rid of the stats part of the quantity name
        QString     qName    = QString::fromStdString( resultAddress.quantityName() );
        std::string orgQName = qName.split( ":" )[1].toStdString();

        RifEclipseSummaryAddress address = RifEclipseSummaryAddress( resultAddress );
        address.setQuantityName( orgQName );

        retval = cases[0]->summaryReader()->unitName( address );
    }

    return retval;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
RiaDefines::EclipseUnitSystem RifEnsembleStatisticsReader::unitSystem() const
{
    return m_ensembleStatCase->unitSystem();
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RifEnsembleStatisticsReader::validateAddress( const RifEclipseSummaryAddress& address ) const
{
    return address.category() == RifEclipseSummaryAddress::SUMMARY_ENSEMBLE_STATISTICS && !address.quantityName().empty();
}