// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
 * @class   vtkReebGraphSimplificationFilter
 * @brief   simplify an input Reeb graph.
 *
 * The filter takes an input vtkReebGraph object and outputs a
 * vtkReebGraph object.
 */

#ifndef vtkReebGraphSimplificationFilter_h
#define vtkReebGraphSimplificationFilter_h

#include "vtkDirectedGraphAlgorithm.h"
#include "vtkFiltersReebGraphModule.h" // For export macro

VTK_ABI_NAMESPACE_BEGIN
class vtkReebGraph;
class vtkReebGraphSimplificationMetric;

class VTKFILTERSREEBGRAPH_EXPORT vtkReebGraphSimplificationFilter : public vtkDirectedGraphAlgorithm
{
public:
  static vtkReebGraphSimplificationFilter* New();
  vtkTypeMacro(vtkReebGraphSimplificationFilter, vtkDirectedGraphAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  ///@{
  /**
   * Set the persistence threshold for simplification (from 0 to 1).
   * Default value: 0 (no simplification).
   */
  vtkSetMacro(SimplificationThreshold, double);
  vtkGetMacro(SimplificationThreshold, double);
  ///@}

  /**
   * Set the persistence metric evaluation code
   * Default value: nullptr (standard topological persistence).
   */
  void SetSimplificationMetric(vtkReebGraphSimplificationMetric* metric);

  vtkReebGraph* GetOutput();

protected:
  vtkReebGraphSimplificationFilter();
  ~vtkReebGraphSimplificationFilter() override;

  double SimplificationThreshold;

  vtkReebGraphSimplificationMetric* SimplificationMetric;

  int FillInputPortInformation(int portNumber, vtkInformation*) override;
  int FillOutputPortInformation(int, vtkInformation*) override;

  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;

private:
  vtkReebGraphSimplificationFilter(const vtkReebGraphSimplificationFilter&) = delete;
  void operator=(const vtkReebGraphSimplificationFilter&) = delete;
};

VTK_ABI_NAMESPACE_END
#endif