// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
 * @class   vtkSILBuilder
 * @brief   helper class to build a SIL i.e. a directed graph used
 * by reader producing composite datasets to describes the relationships among
 * the blocks.
 *
 * vtkSILBuilder is a helper class to build a SIL i.e. a directed graph used
 * by reader producing composite datasets to describes the relationships among
 * the blocks.
 * Refer to http://www.paraview.org/Wiki/Block_Hierarchy_Meta_Data for details.
 */

#ifndef vtkSILBuilder_h
#define vtkSILBuilder_h

#include "vtkIOXdmf2Module.h" // For export macro
#include "vtkObject.h"

VTK_ABI_NAMESPACE_BEGIN
class vtkUnsignedCharArray;
class vtkStringArray;
class vtkMutableDirectedGraph;

class VTKIOXDMF2_EXPORT vtkSILBuilder : public vtkObject
{
public:
  static vtkSILBuilder* New();
  vtkTypeMacro(vtkSILBuilder, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  ///@{
  /**
   * Get/Set the graph to populate.
   */
  void SetSIL(vtkMutableDirectedGraph*);
  vtkGetObjectMacro(SIL, vtkMutableDirectedGraph);
  ///@}

  /**
   * Initializes the data-structures.
   */
  void Initialize();

  ///@{
  /**
   * Add vertex, child-edge or cross-edge to the graph.
   */
  vtkIdType AddVertex(const char* name);
  vtkIdType AddChildEdge(vtkIdType parent, vtkIdType child);
  vtkIdType AddCrossEdge(vtkIdType src, vtkIdType dst);
  ///@}

  ///@{
  /**
   * Returns the vertex id for the root vertex.
   */
  vtkGetMacro(RootVertex, vtkIdType);
  ///@}

protected:
  vtkSILBuilder();
  ~vtkSILBuilder() override;

  vtkStringArray* NamesArray;
  vtkUnsignedCharArray* CrossEdgesArray;
  vtkMutableDirectedGraph* SIL;

  vtkIdType RootVertex;

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

VTK_ABI_NAMESPACE_END
#endif