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

  Program:   Visualization Toolkit
  Module:    vtkBoostBreadthFirstSearch.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   vtkBoostBreadthFirstSearch
 * @brief   Boost breadth_first_search on a vtkGraph
 *
 *
 *
 * 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).
 *
 * @sa
 * vtkGraph vtkBoostGraphAdapter
*/

#ifndef vtkBoostBreadthFirstSearch_h
#define vtkBoostBreadthFirstSearch_h

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

#include "vtkGraphAlgorithm.h"

class vtkSelection;

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

  //@{
  /**
   * Convenience methods for setting the origin selection input.
   */
  void SetOriginSelection(vtkSelection *s);
  void SetOriginSelectionConnection(vtkAlgorithmOutput* algOutput)
  {
    this->SetInputConnection(1, algOutput);
  }
  //@}

  /**
   * 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);

  /**
   * Convenience method for setting the origin vertex
   * given an array name and string value.
   * This method is primarily for the benefit of the
   * VTK Parallel client/server layer, callers should
   * prefer to use SetOriginVertex() whenever possible.
   */
  void SetOriginVertexString(char* arrayName, char* value);

  //@{
  /**
   * Set the output array name. If no output array name is
   * set then the name 'BFS' is used.
   */
  vtkSetStringMacro(OutputArrayName);
  //@}

  //@{
  /**
   * Use the vtkSelection from input port 1 as the origin vertex.
   * The selection should be a IDS selection with field type POINTS.
   * The first ID in the selection will be used for the origin vertex.
   * Default is off (origin is specified by SetOriginVertex(...)).
   */
  vtkSetMacro(OriginFromSelection, bool);
  vtkGetMacro(OriginFromSelection, bool);
  vtkBooleanMacro(OriginFromSelection, bool);
  //@}

  //@{
  /**
   * Create an output selection containing the ID of a vertex based
   * on the output selection type. The default is to use the
   * the maximum distance from the starting vertex.  Defaults to off.
   */
  vtkGetMacro(OutputSelection, bool);
  vtkSetMacro(OutputSelection, bool);
  vtkBooleanMacro(OutputSelection, bool);
  //@}

  //@{
  /**
   * Set the output selection type. The default is to use the
   * the maximum distance from the starting vertex "MAX_DIST_FROM_ROOT".
   * But you can also specify other things like "ROOT","2D_MAX", etc
   */
  vtkSetStringMacro(OutputSelectionType);
  //@}

protected:
  vtkBoostBreadthFirstSearch();
  ~vtkBoostBreadthFirstSearch();

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

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

  virtual int FillOutputPortInformation(
    int port, vtkInformation* info) override;

private:

  vtkIdType OriginVertexIndex;
  char* InputArrayName;
  char* OutputArrayName;
  vtkVariant OriginValue;
  bool OutputSelection;
  bool OriginFromSelection;
  char* OutputSelectionType;

  //@{
  /**
   * Using the convenience function internally
   */
  vtkSetStringMacro(InputArrayName);
  //@}

  /**
   * 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);

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

#endif
