/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2026-     Equinor 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 "RicImportGridAndSummaryEnsembleFeature.h"

#include "RiaApplication.h"
#include "RiaDefines.h"
#include "RiaFilePathTools.h"
#include "RiaFileSearchTools.h"
#include "RiaGuiApplication.h"
#include "Summary/RiaSummaryPlotTools.h"

#include "RicImportGridAndSummaryEnsembleDialog.h"
#include "RicNewViewFeature.h"

#include "EnsembleFileSet/RimEnsembleFileSetTools.h"
#include "Rim3dView.h"
#include "RimReservoirGridEnsemble.h"
#include "RimSummaryEnsemble.h"
#include "RimViewNameConfig.h"

#include "RiuPlotMainWindow.h"
#include "RiuPlotMainWindowTools.h"

#include <QAction>
#include <QIcon>
#include <QPointer>
#include <QSet>
#include <QSettings>
#include <QTimer>

CAF_CMD_SOURCE_INIT( RicImportGridAndSummaryEnsembleFeature, "RicImportGridAndSummaryEnsembleFeature" );

namespace
{
const QString k_settingsKey = "EnsembleImportParams";
const QChar   k_sep         = '\t';

void storeEnsembleImportParams( const RicImportGridAndSummaryEnsembleDialogResult& result )
{
    QString rootDir = result.rootDir;
    if ( rootDir.endsWith( '/' ) || rootDir.endsWith( '\\' ) ) rootDir.chop( 1 );

    QString record = rootDir + k_sep + result.pathFilter + k_sep + QString::number( static_cast<int>( result.groupingMode ) ) + k_sep +
                     ( result.createGridEnsemble ? QChar( '1' ) : QChar( '0' ) ) + k_sep +
                     ( result.createSummaryEnsemble ? QChar( '1' ) : QChar( '0' ) ) + k_sep + result.filePattern;

    QSettings   settings;
    QStringList stored = settings.value( k_settingsKey ).toStringList();
    stored.erase( std::remove_if( stored.begin(), stored.end(), [&]( const QString& r ) { return r.section( k_sep, 0, 0 ) == rootDir; } ),
                  stored.end() );
    stored.prepend( record );
    while ( stored.size() > 20 )
        stored.removeLast();
    settings.setValue( k_settingsKey, stored );
}

bool loadEnsembleImportParams( const QString&                    rootDir,
                               QString&                          pathFilter,
                               RiaDefines::EnsembleGroupingMode& groupingMode,
                               bool&                             createGrid,
                               bool&                             createSummary,
                               QString&                          filePattern )
{
    QSettings   settings;
    QStringList stored = settings.value( k_settingsKey ).toStringList();
    for ( const auto& r : stored )
    {
        if ( r.section( k_sep, 0, 0 ) == rootDir )
        {
            pathFilter    = r.section( k_sep, 1, 1 );
            groupingMode  = static_cast<RiaDefines::EnsembleGroupingMode>( r.section( k_sep, 2, 2 ).toInt() );
            createGrid    = r.section( k_sep, 3, 3 ) == "1";
            createSummary = r.section( k_sep, 4, 4 ) == "1";
            filePattern   = r.section( k_sep, 5, 5 );
            if ( filePattern.isEmpty() ) filePattern = "*";
            return true;
        }
    }
    return false;
}
} // namespace

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
static void doImport( const RicImportGridAndSummaryEnsembleDialogResult& result, QPointer<QWidget> activeWindowBeforeImport )
{
    // Build the union of base paths (extension-stripped) from both lists so every realization
    // appears exactly once. findPathPattern requires each realization number to be unique across
    // the input; duplicating paths with different extensions breaks the pattern detection.
    QStringList strippedPaths;

    for ( const auto& f : result.gridFiles )
        strippedPaths << RiaFilePathTools::removeFileExtension( f );
    for ( const auto& f : result.summaryFiles )
        strippedPaths << RiaFilePathTools::removeFileExtension( f );

    strippedPaths.removeDuplicates();

    if ( strippedPaths.isEmpty() ) return;

    auto fileSets = RimEnsembleFileSetTools::createEnsembleFileSets( strippedPaths, result.groupingMode );
    if ( fileSets.empty() ) return;

    bool gridEnsemblesCreated = false;
    if ( result.createGridEnsemble && !result.gridFiles.isEmpty() )
    {
        auto gridEnsembles = RimEnsembleFileSetTools::createGridEnsemblesFromFileSets( fileSets );
        if ( !gridEnsembles.empty() )
        {
            gridEnsemblesCreated = true;
            auto firstEnsemble   = gridEnsembles.front();
            auto cases           = firstEnsemble->cases();
            if ( !cases.empty() )
            {
                auto view = RicNewViewFeature::addReservoirView( cases.front(), nullptr, firstEnsemble->viewCollection() );
                if ( view ) view->nameConfig()->setAddCaseName( true );
            }
        }
    }

    if ( result.createSummaryEnsemble && !result.summaryFiles.isEmpty() )
    {
        auto summaryEnsembles = RimEnsembleFileSetTools::createSummaryEnsemblesFromFileSets( fileSets );
        for ( auto ensemble : summaryEnsembles )
        {
            RiaSummaryPlotTools::createAndAppendDefaultSummaryMultiPlot( {}, { ensemble } );
        }
        if ( !summaryEnsembles.empty() ) RiuPlotMainWindowTools::showPlotMainWindow();
    }

    if ( gridEnsemblesCreated && activeWindowBeforeImport )
    {
        QTimer::singleShot( 500,
                            activeWindowBeforeImport,
                            [activeWindowBeforeImport]()
                            {
                                activeWindowBeforeImport->raise();
                                activeWindowBeforeImport->activateWindow();
                            } );
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RicImportGridAndSummaryEnsembleFeature::importFromDirectory( const QString& dirPath )
{
    if ( !RiaGuiApplication::instance() ) return false;

    QString                          pathFilter;
    RiaDefines::EnsembleGroupingMode groupingMode;
    bool                             createGrid;
    bool                             createSummary;
    QString                          filePattern;

    if ( !loadEnsembleImportParams( dirPath, pathFilter, groupingMode, createGrid, createSummary, filePattern ) ) return false;

    QString rootDir = dirPath;
    if ( rootDir.size() > 1 && ( rootDir.endsWith( '/' ) || rootDir.endsWith( '\\' ) ) ) rootDir.chop( 1 );

    QStringList matchingFolders;
    RiaFileSearchTools::findMatchingFoldersRecursively( rootDir, pathFilter, matchingFolders );

    QStringList gridFiles = RiaFileSearchTools::findFilesInFolders( matchingFolders, { filePattern + ".EGRID" } );
    QStringList summaryFiles = RiaFileSearchTools::findFilesInFolders( matchingFolders, { filePattern + ".SMSPEC", filePattern + ".ESMRY" } );
    std::sort( summaryFiles.begin(), summaryFiles.end() );

    if ( gridFiles.isEmpty() && summaryFiles.isEmpty() ) return false;

    RicImportGridAndSummaryEnsembleDialogResult result;
    result.ok                    = true;
    result.rootDir               = rootDir + RiaFilePathTools::separator();
    result.pathFilter            = pathFilter;
    result.filePattern           = filePattern;
    result.groupingMode          = groupingMode;
    result.createGridEnsemble    = createGrid;
    result.createSummaryEnsemble = createSummary;
    result.gridFiles             = gridFiles;
    result.summaryFiles          = summaryFiles;

    QPointer<QWidget> activeWindowBeforeImport = RiaGuiApplication::widgetToUseAsParent();
    doImport( result, activeWindowBeforeImport );

    return true;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RicImportGridAndSummaryEnsembleFeature::onActionTriggered( bool isChecked )
{
    QPointer<QWidget> activeWindowBeforeImport = RiaGuiApplication::widgetToUseAsParent();

    bool startedFromPlotWindow = ( RiaGuiApplication::activeMainWindow() == RiaGuiApplication::instance()->mainPlotWindow() );

    auto result = RicImportGridAndSummaryEnsembleDialog::runDialog( activeWindowBeforeImport, !startedFromPlotWindow, startedFromPlotWindow );

    if ( !result.ok ) return;
    if ( !result.createGridEnsemble && !result.createSummaryEnsemble ) return;

    doImport( result, activeWindowBeforeImport );

    storeEnsembleImportParams( result );

    QString rootDir = result.rootDir;
    if ( rootDir.endsWith( '/' ) || rootDir.endsWith( '\\' ) ) rootDir.chop( 1 );
    RiaApplication::instance()->addToRecentFiles( rootDir );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RicImportGridAndSummaryEnsembleFeature::setupActionLook( QAction* actionToSetup )
{
    actionToSetup->setIcon( QIcon( ":/GridAndSummaryEnsemble.svg" ) );
    actionToSetup->setText( "Import Grid and Summary Ensemble" );
}