//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt for details.
//  This software is distributed WITHOUT ANY WARRANTY; without even
//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
//  PURPOSE.  See the above copyright notice for more information.
//
//  Copyright 2016 National Technology & Engineering Solutions of Sandia, LLC (NTESS).
//  Copyright 2016 UT-Battelle, LLC.
//  Copyright 2016 Los Alamos National Security.
//
//  Under the terms of Contract DE-NA0003525 with NTESS,
//  the U.S. Government retains certain rights in this software.
//
//  Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
//  Laboratory (LANL), the U.S. Government retains certain rights in
//  this software.
//============================================================================
#ifndef vtk_m_filter_internal_ResolveFieldTypeAndMap_h
#define vtk_m_filter_internal_ResolveFieldTypeAndMap_h

#include <vtkm/cont/DataSet.h>
#include <vtkm/cont/RuntimeDeviceTracker.h>
#include <vtkm/cont/TryExecute.h>
#include <vtkm/cont/internal/DeviceAdapterTag.h>

#include <vtkm/filter/FieldMetadata.h>
#include <vtkm/filter/PolicyBase.h>

//forward declarations needed
namespace vtkm
{
namespace filter
{
class Result;
}
}

namespace vtkm
{
namespace filter
{
namespace internal
{
struct ResolveFieldTypeAndMapForDevice
{
  template <typename DeviceAdapterTag, typename InstanceType, typename FieldType>
  bool operator()(DeviceAdapterTag tag, InstanceType&& instance, FieldType&& field) const
  {
    return instance.DerivedClass->DoMapField(
      instance.InputResult, field, instance.Metadata, instance.Policy, tag);
  }
};

template <typename Derived, typename DerivedPolicy>
struct ResolveFieldTypeAndMap
{
  using Self = ResolveFieldTypeAndMap<Derived, DerivedPolicy>;

  Derived* DerivedClass;
  vtkm::filter::Result& InputResult;
  const vtkm::filter::FieldMetadata& Metadata;
  const vtkm::filter::PolicyBase<DerivedPolicy>& Policy;
  bool& RanProperly;

  ResolveFieldTypeAndMap(Derived* derivedClass,
                         vtkm::filter::Result& inResult,
                         const vtkm::filter::FieldMetadata& fieldMeta,
                         const vtkm::filter::PolicyBase<DerivedPolicy>& policy,
                         bool& ran)
    : DerivedClass(derivedClass)
    , InputResult(inResult)
    , Metadata(fieldMeta)
    , Policy(policy)
    , RanProperly(ran)
  {
  }

  template <typename T, typename StorageTag>
  void operator()(const vtkm::cont::ArrayHandle<T, StorageTag>& field,
                  vtkm::cont::RuntimeDeviceTracker& tracker) const
  {
    ResolveFieldTypeAndMapForDevice doResolve;
    this->RanProperly = vtkm::cont::TryExecute(
      doResolve, tracker, typename DerivedPolicy::DeviceAdapterList(), *this, field);
  }

private:
  void operator=(const ResolveFieldTypeAndMap<Derived, DerivedPolicy>&) = delete;
};
}
}
} // namespace vtkm::filter::internal

#endif //vtk_m_filter_internal_ResolveFieldTypeAndMap_h
