/////////////////////////////////////////////////////////////////////////////////
//
//  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 "gtest/gtest.h"

#include <QDateTime>
#include <QDebug>
#include <QElapsedTimer>

#include "RigHexIntersectionTools.h"

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
TEST( RigHexIntersectionTools, planeHexCellIntersectionTest )
{
    cvf::Vec3d hexCorners[8];
    hexCorners[0] = cvf::Vec3d( 0, 0, 0 );
    hexCorners[1] = cvf::Vec3d( 1, 0, 0 );
    hexCorners[2] = cvf::Vec3d( 0, 1, 0 );
    hexCorners[3] = cvf::Vec3d( 0, 0, 1 );
    hexCorners[4] = cvf::Vec3d( 0, 1, 1 );
    hexCorners[5] = cvf::Vec3d( 1, 1, 0 );
    hexCorners[6] = cvf::Vec3d( 1, 0, 1 );
    hexCorners[7] = cvf::Vec3d( 1, 1, 1 );

    std::list<std::pair<cvf::Vec3d, cvf::Vec3d>> intersectionLineSegments;
    bool                                         isCellIntersected = false;
    cvf::Plane                                   fracturePlane;

    fracturePlane.setFromPointAndNormal( cvf::Vec3d( 0.5, 0.5, 0.5 ), cvf::Vec3d( 1, 0, 0 ) );
    isCellIntersected = RigHexIntersectionTools::planeHexCellIntersection( hexCorners, fracturePlane, intersectionLineSegments );
    EXPECT_TRUE( isCellIntersected );

    fracturePlane.setFromPointAndNormal( cvf::Vec3d( 1.5, 1.5, 1.5 ), cvf::Vec3d( 1, 0, 0 ) );
    isCellIntersected = RigHexIntersectionTools::planeHexCellIntersection( hexCorners, fracturePlane, intersectionLineSegments );
    EXPECT_FALSE( isCellIntersected );
}

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
TEST( RigHexIntersectionTools, DISABLED_planeHexCellIntersectionPerformanceTest )
{
    cvf::Vec3d hexCorners[8];
    hexCorners[0] = cvf::Vec3d( 0, 0, 0 );
    hexCorners[1] = cvf::Vec3d( 1, 0, 0 );
    hexCorners[2] = cvf::Vec3d( 0, 1, 0 );
    hexCorners[3] = cvf::Vec3d( 0, 0, 1 );
    hexCorners[4] = cvf::Vec3d( 0, 1, 1 );
    hexCorners[5] = cvf::Vec3d( 1, 1, 0 );
    hexCorners[6] = cvf::Vec3d( 1, 0, 1 );
    hexCorners[7] = cvf::Vec3d( 1, 1, 1 );

    bool       isCellIntersected = false;
    cvf::Plane fracturePlaneIntersecting;
    cvf::Plane fracturePlaneNotIntersecting;

    fracturePlaneNotIntersecting.setFromPointAndNormal( cvf::Vec3d( 1.5, 1.5, 1.5 ), cvf::Vec3d( 1, 0, 0 ) );
    fracturePlaneIntersecting.setFromPointAndNormal( cvf::Vec3d( 0.5, 0.5, 0.5 ), cvf::Vec3d( 1, 0, 0 ) );

    QElapsedTimer timeTotal;
    timeTotal.start();

    for ( int run = 0; run < 5; run++ )
    {
        QElapsedTimer timeLocal;
        timeLocal.start();

        for ( int i = 0; i < 2000000; i++ )
        {
            std::list<std::pair<cvf::Vec3d, cvf::Vec3d>> intersectionLineSegments;

            isCellIntersected =
                RigHexIntersectionTools::planeHexCellIntersection( hexCorners, fracturePlaneIntersecting, intersectionLineSegments );
            isCellIntersected =
                RigHexIntersectionTools::planeHexCellIntersection( hexCorners, fracturePlaneNotIntersecting, intersectionLineSegments );
        }

        qDebug() << "Time rim elapsed: " << timeLocal.elapsed();
    }

    qDebug() << "Time total elapsed: " << timeTotal.elapsed() << " intersected: " << static_cast<int>( isCellIntersected );
}
