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#ifndef vtk_m_worklet_CosmoTools_h
#define vtk_m_worklet_CosmoTools_h

#include <vtkm/cont/ArrayHandle.h>
#include <vtkm/cont/DeviceAdapterAlgorithm.h>
#include <vtkm/cont/Field.h>

#include <vtkm/worklet/cosmotools/CosmoTools.h>
#include <vtkm/worklet/cosmotools/CosmoToolsCenterFinder.h>
#include <vtkm/worklet/cosmotools/CosmoToolsHaloFinder.h>

namespace vtkm
{
namespace worklet
{

class CosmoTools
{
public:
  // Run the halo finder and then the NxN MBP center finder
  template <typename FieldType, typename StorageType>
  void RunHaloFinder(vtkm::cont::ArrayHandle<FieldType, StorageType>& xLocation,
                     vtkm::cont::ArrayHandle<FieldType, StorageType>& yLocation,
                     vtkm::cont::ArrayHandle<FieldType, StorageType>& zLocation,
                     const vtkm::Id nParticles,
                     const FieldType particleMass,
                     const vtkm::Id minHaloSize,
                     const FieldType linkingLen,
                     vtkm::cont::ArrayHandle<vtkm::Id>& resultHaloId,
                     vtkm::cont::ArrayHandle<vtkm::Id>& resultMBP,
                     vtkm::cont::ArrayHandle<FieldType>& resultPot)
  {
    // Constructor gets particle locations, particle mass and min halo size
    cosmotools::CosmoTools<FieldType, StorageType> cosmo(
      nParticles, particleMass, minHaloSize, linkingLen, xLocation, yLocation, zLocation);

    // Find the halos within the particles and the MBP center of each halo
    cosmo.HaloFinder(resultHaloId, resultMBP, resultPot);
  }

  // Run MBP on a single halo of particles using the N^2 algorithm
  template <typename FieldType, typename StorageType>
  void RunMBPCenterFinderNxN(vtkm::cont::ArrayHandle<FieldType, StorageType> xLocation,
                             vtkm::cont::ArrayHandle<FieldType, StorageType> yLocation,
                             vtkm::cont::ArrayHandle<FieldType, StorageType> zLocation,
                             const vtkm::Id nParticles,
                             const FieldType particleMass,
                             vtkm::Pair<vtkm::Id, FieldType>& nxnResult)
  {
    // Constructor gets particle locations and particle mass
    cosmotools::CosmoTools<FieldType, StorageType> cosmo(
      nParticles, particleMass, xLocation, yLocation, zLocation);

    // Most Bound Particle N x N algorithm
    FieldType nxnPotential;
    vtkm::Id nxnMBP = cosmo.MBPCenterFinderNxN(&nxnPotential);

    nxnResult.first = nxnMBP;
    nxnResult.second = nxnPotential;
  }

  // Run MBP on a single halo of particles using MxN estimation algorithm
  template <typename FieldType, typename StorageType>
  void RunMBPCenterFinderMxN(vtkm::cont::ArrayHandle<FieldType, StorageType> xLocation,
                             vtkm::cont::ArrayHandle<FieldType, StorageType> yLocation,
                             vtkm::cont::ArrayHandle<FieldType, StorageType> zLocation,
                             const vtkm::Id nParticles,
                             const FieldType particleMass,
                             vtkm::Pair<vtkm::Id, FieldType>& mxnResult)
  {
    // Constructor gets particle locations and particle mass
    cosmotools::CosmoTools<FieldType, StorageType> cosmo(
      nParticles, particleMass, xLocation, yLocation, zLocation);

    // Most Bound Particle M x N algorithm with binning estimates
    FieldType mxnPotential;
    vtkm::Id mxnMBP = cosmo.MBPCenterFinderMxN(&mxnPotential);

    mxnResult.first = mxnMBP;
    mxnResult.second = mxnPotential;
  }
};
}
} // namespace vtkm::worklet

#endif // vtk_m_worklet_CosmoTools_h
