// @HEADER
// *****************************************************************************
//               Rapid Optimization Library (ROL) Package
//
// Copyright 2014 NTESS and the ROL contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#include "../TOOLS/meshmanagerK.hpp"

template<class Real, class DeviceType>
class MeshManager_Stokes : public MeshManager_Rectangle<Real,DeviceType> {
private:
  int nx_;
  int ny_;

  ROL::Ptr<std::vector<std::vector<std::vector<int>>>>  meshSideSets_;

public:

  MeshManager_Stokes(ROL::ParameterList &parlist) : MeshManager_Rectangle<Real,DeviceType>(parlist) {
    nx_ = parlist.sublist("Geometry").get("NX", 3);
    ny_ = parlist.sublist("Geometry").get("NY", 1);
    computeSideSets();
  }

  void computeSideSets() override {

    int numSideSets = 5;
    meshSideSets_ = ROL::makePtr<std::vector<std::vector<std::vector<int>>>>(numSideSets);

    // Bottom
    (*meshSideSets_)[0].resize(4);
    (*meshSideSets_)[0][0].resize(nx_);
    (*meshSideSets_)[0][1].resize(0);
    (*meshSideSets_)[0][2].resize(0);
    (*meshSideSets_)[0][3].resize(0);
    // Right
    (*meshSideSets_)[1].resize(4);
    (*meshSideSets_)[1][0].resize(0);
    (*meshSideSets_)[1][1].resize(ny_);
    (*meshSideSets_)[1][2].resize(0);
    (*meshSideSets_)[1][3].resize(0);
    // Left
    (*meshSideSets_)[2].resize(4);
    (*meshSideSets_)[2][0].resize(0);
    (*meshSideSets_)[2][1].resize(0);
    (*meshSideSets_)[2][2].resize(0);
    (*meshSideSets_)[2][3].resize(ny_);
    // Top
    (*meshSideSets_)[3].resize(4);
    (*meshSideSets_)[3][0].resize(0);
    (*meshSideSets_)[3][1].resize(0);
    (*meshSideSets_)[3][2].resize(nx_);
    (*meshSideSets_)[3][3].resize(0);
    // Pressure Pinning
    (*meshSideSets_)[4].resize(4);
    //(*meshSideSets_)[4][0].resize(1);
    //(*meshSideSets_)[4][1].resize(1);
    //(*meshSideSets_)[4][2].resize(1);
    //(*meshSideSets_)[4][3].resize(1);
    (*meshSideSets_)[4][0].resize(1);
    (*meshSideSets_)[4][1].resize(0);
    (*meshSideSets_)[4][2].resize(0);
    (*meshSideSets_)[4][3].resize(0);
    
    // Bottom
    for (int i=0; i<nx_; ++i)
      (*meshSideSets_)[0][0][i] = i;
    // Right
    for (int i=0; i<ny_; ++i)
      (*meshSideSets_)[1][1][i] = (i+1)*nx_-1;
    // Left
    for (int i=0; i<ny_; ++i)
      (*meshSideSets_)[2][3][i] = i*nx_;
    // Top
    for (int i=0; i<nx_; ++i)
      (*meshSideSets_)[3][2][i] = i + nx_*(ny_-1);
    // Pressure Pinning
    //int offset = nx_ * (ny_/2) + (nx_-1)/2;
    //(*meshSideSets_)[4][0][0] = offset + nx_ + 1;
    //(*meshSideSets_)[4][1][0] = offset + nx_;
    //(*meshSideSets_)[4][2][0] = offset;
    //(*meshSideSets_)[4][3][0] = offset + 1;
    (*meshSideSets_)[4][0][0] = 0;

  } // computeSideSets

  ROL::Ptr<std::vector<std::vector<std::vector<int>>>> getSideSets(
              const bool verbose = false,
              std::ostream & outStream = std::cout) const override { 
    return meshSideSets_;
  }

}; // MeshManager_Stokes
