/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2018-     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 "RicNewPolylineTargetFeature.h"

CAF_CMD_SOURCE_INIT( RicNewPolylineTargetFeature, "RicNewPolylineTargetFeature" );

#include "RimCase.h"
#include "RimGridView.h"
#include "RimPolylineTarget.h"
#include "RimProject.h"
#include "RimUserDefinedPolylinesAnnotation.h"
#include "cafSelectionManager.h"
#include <QAction>

#include "cvfBoundingBox.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
bool RicNewPolylineTargetFeature::isCommandEnabled()
{
    {
        std::vector<RimUserDefinedPolylinesAnnotation*> objects;
        caf::SelectionManager::instance()->objectsByType( &objects );

        if ( !objects.empty() )
        {
            return true;
        }
    }
    {
        std::vector<RimPolylineTarget*> objects;
        caf::SelectionManager::instance()->objectsByType( &objects, caf::SelectionManager::FIRST_LEVEL );

        if ( !objects.empty() )
        {
            return true;
        }
    }

    return false;
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RicNewPolylineTargetFeature::onActionTriggered( bool isChecked )
{
    std::vector<RimPolylineTarget*> selectedTargets;
    caf::SelectionManager::instance()->objectsByType( &selectedTargets, caf::SelectionManager::FIRST_LEVEL );
    if ( !selectedTargets.empty() )
    {
        auto                               firstTarget = selectedTargets.front();
        RimUserDefinedPolylinesAnnotation* polylineDef = nullptr;
        firstTarget->firstAncestorOrThisOfTypeAsserted( polylineDef );

        auto afterBeforePair = polylineDef->findActiveTargetsAroundInsertionPoint( firstTarget );

        cvf::Vec3d newPos = cvf::Vec3d::ZERO;

        if ( !afterBeforePair.first && afterBeforePair.second )
        {
            newPos = afterBeforePair.second->targetPointXYZ();

            // Small displacement to separate the targets
            newPos.x() -= 50;
            newPos.y() -= 50;
        }
        else if ( afterBeforePair.first && afterBeforePair.second )
        {
            newPos = 0.5 * ( afterBeforePair.first->targetPointXYZ() + afterBeforePair.second->targetPointXYZ() );
        }
        else if ( afterBeforePair.first && !afterBeforePair.second )
        {
            std::vector<RimPolylineTarget*> activeTargets = polylineDef->activeTargets();
            size_t                          targetCount   = activeTargets.size();
            if ( targetCount > 1 )
            {
                newPos                    = activeTargets[targetCount - 1]->targetPointXYZ();
                cvf::Vec3d nextLastToLast = newPos - activeTargets[targetCount - 2]->targetPointXYZ();
                newPos += 0.5 * nextLastToLast;
            }
            else
            {
                newPos = afterBeforePair.first->targetPointXYZ() + cvf::Vec3d( 0, 0, 200 );
            }
        }

        auto* newTarget = new RimPolylineTarget;
        newTarget->setAsPointTargetXYD( { newPos[0], newPos[1], -newPos[2] } );

        polylineDef->insertTarget( firstTarget, newTarget );
        polylineDef->updateEditorsAndVisualization();

        return;
    }

    std::vector<RimUserDefinedPolylinesAnnotation*> polylineDefs;
    caf::SelectionManager::instance()->objectsByType( &polylineDefs );
    if ( !polylineDefs.empty() )
    {
        auto*                           polylineDef   = polylineDefs[0];
        std::vector<RimPolylineTarget*> activeTargets = polylineDef->activeTargets();

        size_t targetCount = activeTargets.size();

        if ( targetCount == 0 )
        {
            auto defaultPos = cvf::Vec3d::ZERO;

            // Set decent position
            std::vector<RimGridView*> gridViews;
            RimProject::current()->allVisibleGridViews( gridViews );
            if ( !gridViews.empty() )
            {
                auto minPos = gridViews.front()->ownerCase()->allCellsBoundingBox().min();
                defaultPos  = minPos;
            }

            polylineDef->appendTarget( defaultPos );
        }
        else
        {
            cvf::Vec3d newPos = cvf::Vec3d::ZERO;

            if ( targetCount > 1 )
            {
                newPos                    = activeTargets[targetCount - 1]->targetPointXYZ();
                cvf::Vec3d nextLastToLast = newPos - activeTargets[targetCount - 2]->targetPointXYZ();
                newPos += 0.5 * nextLastToLast;
            }
            else if ( targetCount > 0 )
            {
                newPos = activeTargets[targetCount - 1]->targetPointXYZ() + cvf::Vec3d( 0, 0, 200 );
            }

            auto* newTarget = new RimPolylineTarget;
            newTarget->setAsPointTargetXYD( { newPos[0], newPos[1], -newPos[2] } );
            polylineDef->insertTarget( nullptr, newTarget );
        }

        polylineDef->updateEditorsAndVisualization();
    }
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
void RicNewPolylineTargetFeature::setupActionLook( QAction* actionToSetup )
{
    actionToSetup->setText( "New Target" );
    actionToSetup->setIcon( QIcon( ":/Well.svg" ) );
}