//============================================================================
//  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.
//============================================================================

#include <vtkm/filter/FieldMetadata.h>
#include <vtkm/filter/FilterTraits.h>
#include <vtkm/filter/PolicyDefault.h>

#include <vtkm/filter/internal/ResolveFieldTypeAndExecute.h>
#include <vtkm/filter/internal/ResolveFieldTypeAndMap.h>

namespace vtkm
{
namespace filter
{

//----------------------------------------------------------------------------
template <typename Derived>
inline VTKM_CONT FilterDataSet<Derived>::FilterDataSet()
  : CellSetIndex(0)
  , CoordinateSystemIndex(0)
{
}

//----------------------------------------------------------------------------
template <typename Derived>
inline VTKM_CONT FilterDataSet<Derived>::~FilterDataSet()
{
}

//-----------------------------------------------------------------------------
template <typename Derived>
template <typename DerivedPolicy>
inline VTKM_CONT vtkm::cont::DataSet FilterDataSet<Derived>::PrepareForExecution(
  const vtkm::cont::DataSet& input,
  const vtkm::filter::PolicyBase<DerivedPolicy>& policy)
{
  return (static_cast<Derived*>(this))->DoExecute(input, policy);
}

//-----------------------------------------------------------------------------
template <typename Derived>
template <typename DerivedPolicy>
inline VTKM_CONT bool FilterDataSet<Derived>::MapFieldOntoOutput(
  vtkm::cont::DataSet& result,
  const vtkm::cont::Field& field,
  const vtkm::filter::PolicyBase<DerivedPolicy>& policy)
{
  bool valid = false;

  vtkm::filter::FieldMetadata metaData(field);
  using FunctorType = internal::ResolveFieldTypeAndMap<Derived, DerivedPolicy>;
  FunctorType functor(static_cast<Derived*>(this), result, metaData, policy, valid);

  using Traits = vtkm::filter::FilterTraits<Derived>;
  vtkm::cont::CastAndCall(vtkm::filter::ApplyPolicy(field, policy, Traits()), functor);

  //the bool valid will be modified by the map algorithm to hold if the
  //mapping occurred or not. If the mapping was good a new field has been
  //added to the result that was passed in.
  return valid;
}
}
}