/////////////////////////////////////////////////////////////////////////////////
//
//  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.
//
/////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "cvfMatrix4.h"

#include <gsl/gsl>

#include <map>
#include <vector>

class RigWellPath;
class RimFracture;
class RigWellPathStimplanIntersectorTester;

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
class RigWellPathStimplanIntersector
{
public:
    struct WellCellIntersection
    {
        WellCellIntersection()
            : hlength( 0.0 )
            , vlength( 0.0 )
            , endpointCount( 0 )
        {
        }
        double hlength;
        double vlength;
        int    endpointCount;

        double computeLength() const { return cvf::Math::sqrt( hlength * hlength + vlength * vlength ); }
    };

    RigWellPathStimplanIntersector( const std::vector<cvf::Vec3d>& wellPathPoints, gsl::not_null<const RimFracture*> rimFracture );

    const std::map<size_t, WellCellIntersection>& intersections() const;

private:
    friend class RigWellPathStimplanIntersectorTester;
    static void calculate( const cvf::Mat4d&                           fractureXf,
                           const std::vector<cvf::Vec3d>&              wellPathPoints,
                           double                                      wellRadius,
                           double                                      perforationLength,
                           const std::vector<std::vector<cvf::Vec3d>>& stpCellPolygons,
                           std::map<size_t, WellCellIntersection>&     stimPlanCellIdxToIntersectionInfoMap );

    std::map<size_t, WellCellIntersection> m_stimPlanCellIdxToIntersectionInfoMap;
};

//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
class RigWellPathStimplanIntersectorTester
{
public:
    static void testCalculate( const cvf::Mat4d&                           fractureXf,
                               const std::vector<cvf::Vec3d>&              wellPathPoints,
                               double                                      wellRadius,
                               double                                      perforationLength,
                               const std::vector<std::vector<cvf::Vec3d>>& stpCellPolygons,
                               std::map<size_t, RigWellPathStimplanIntersector::WellCellIntersection>& stimPlanCellIdxToIntersectionInfoMap )
    {
        RigWellPathStimplanIntersector::calculate( fractureXf,
                                                   wellPathPoints,
                                                   wellRadius,
                                                   perforationLength,
                                                   stpCellPolygons,
                                                   stimPlanCellIdxToIntersectionInfoMap );
    }
};
