/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkBoostBreadthFirstSearchTree.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm 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 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
/**
 * @class   vtkBoostBreadthFirstSearchTree
 * @brief   Constructs a BFS tree from a graph
 *
 *
 *
 * This vtk class uses the Boost breadth_first_search
 * generic algorithm to perform a breadth first search from a given
 * a 'source' vertex on the input graph (a vtkGraph).
 * The result is a tree with root node corresponding to the start node
 * of the search.
 *
 * @sa
 * vtkGraph vtkBoostGraphAdapter
*/

#ifndef vtkBoostBreadthFirstSearchTree_h
#define vtkBoostBreadthFirstSearchTree_h

#include "vtkInfovisBoostGraphAlgorithmsModule.h" // For export macro
#include "vtkStdString.h" // For string type
#include "vtkVariant.h" // For variant type

#include "vtkTreeAlgorithm.h"

class VTKINFOVISBOOSTGRAPHALGORITHMS_EXPORT vtkBoostBreadthFirstSearchTree : public vtkTreeAlgorithm
{
public:
  static vtkBoostBreadthFirstSearchTree *New();
  vtkTypeMacro(vtkBoostBreadthFirstSearchTree, vtkTreeAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  /**
   * Set the index (into the vertex array) of the
   * breadth first search 'origin' vertex.
   */
  void SetOriginVertex(vtkIdType index);

  /**
   * Set the breadth first search 'origin' vertex.
   * This method is basically the same as above
   * but allows the application to simply specify
   * an array name and value, instead of having to
   * know the specific index of the vertex.
   */
  void SetOriginVertex(vtkStdString arrayName, vtkVariant value);

  //@{
  /**
   * Stores the graph vertex ids for the tree vertices in an array
   * named "GraphVertexId".  Default is off.
   */
  vtkSetMacro(CreateGraphVertexIdArray, bool);
  vtkGetMacro(CreateGraphVertexIdArray, bool);
  vtkBooleanMacro(CreateGraphVertexIdArray, bool);
  //@}

  //@{
  /**
   * Turn on this option to reverse the edges in the graph.
   */
  vtkSetMacro(ReverseEdges, bool);
  vtkGetMacro(ReverseEdges, bool);
  vtkBooleanMacro(ReverseEdges, bool);
  //@}

protected:
  vtkBoostBreadthFirstSearchTree();
  ~vtkBoostBreadthFirstSearchTree();

  int FillInputPortInformation(int port, vtkInformation* info) override;

  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *) override;

private:

  vtkIdType OriginVertexIndex;
  char* ArrayName;
  vtkVariant OriginValue;
  bool ArrayNameSet;
  bool CreateGraphVertexIdArray;
  bool ReverseEdges;

  //@{
  /**
   * Using the convenience function for set strings internally
   */
  vtkSetStringMacro(ArrayName);
  //@}

  /**
   * This method is basically a helper function to find
   * the index of a specific value within a specific array
   */
  vtkIdType GetVertexIndex(
    vtkAbstractArray *abstract,vtkVariant value);

  vtkBoostBreadthFirstSearchTree(const vtkBoostBreadthFirstSearchTree&) = delete;
  void operator=(const vtkBoostBreadthFirstSearchTree&) = delete;
};

#endif
