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

 Program:   Visualization Toolkit
 Module:    vtkExtentRCBPartitioner.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.

 =========================================================================*/
#ifndef VTKEXTENTRCBPARTITIONER_H_
#define VTKEXTENTRCBPARTITIONER_H_

#include "vtkCommonExecutionModelModule.h" // For export macro
#include "vtkObject.h"
#include <vector> // For STL vector
#include <cassert>  // For assert
#include <string> // For std::string

class VTKCOMMONEXECUTIONMODEL_EXPORT vtkExtentRCBPartitioner : public vtkObject
{
  public:
    static vtkExtentRCBPartitioner *New();
    vtkTypeMacro(vtkExtentRCBPartitioner,vtkObject);
    void PrintSelf(ostream &oss, vtkIndent indent );


    void SetNumberOfPartitions( const int N )
      {
      assert( "pre: Number of partitions requested must be > 0" && (N >= 0) );
      this->Reset();
      this->NumberOfPartitions = N;
      }


    void SetGlobalExtent(int imin,int imax,int jmin,int jmax,int kmin,int kmax)
      {
      this->Reset();
      this->GlobalExtent[0] = imin;
      this->GlobalExtent[1] = imax;
      this->GlobalExtent[2] = jmin;
      this->GlobalExtent[3] = jmax;
      this->GlobalExtent[4] = kmin;
      this->GlobalExtent[5] = kmax;
      }
    void SetGlobalExtent( int ext[6] )
      {
      this->SetGlobalExtent( ext[0], ext[1], ext[2], ext[3], ext[4], ext[5] );
      }


    vtkSetMacro(DuplicateNodes,int);
    vtkGetMacro(DuplicateNodes,int);
    vtkBooleanMacro(DuplicateNodes,int);


    vtkSetMacro(NumberOfGhostLayers,int);
    vtkGetMacro(NumberOfGhostLayers,int);


    vtkGetMacro(NumExtents,int);

    void Partition();

    void GetPartitionExtent( const int idx, int ext[6] );

  protected:
    vtkExtentRCBPartitioner();
   ~vtkExtentRCBPartitioner();


    void Reset()
     {
     this->PartitionExtents.clear();
     this->NumExtents          = 0;
     this->ExtentIsPartitioned = false;
     }

    void ExtendGhostLayers( int ext[6] );


    void GetGhostedExtent(
        int ext[6], const int minIdx, const int maxIdx )
      {
      ext[minIdx]-=this->NumberOfGhostLayers;
      ext[maxIdx]+=this->NumberOfGhostLayers;
      ext[minIdx] = (ext[minIdx] < this->GlobalExtent[minIdx])?
          this->GlobalExtent[minIdx] : ext[minIdx];
      ext[maxIdx] = (ext[maxIdx] > this->GlobalExtent[maxIdx])?
          this->GlobalExtent[maxIdx] : ext[maxIdx];
      }

    void AcquireDataDescription();

     void GetExtent( const int idx, int ext[6] );

     void AddExtent(int ext[6]);

     void ReplaceExtent(const int idx, int ext[6]);

     void SplitExtent(int parent[6],int s1[6],int s2[6],int splitDimension);

     int GetNumberOfTotalExtents();

     int GetNumberOfNodes( int ext[6] );

     int GetNumberOfCells( int ext[6] );

     int GetLongestDimensionLength( int ext[6] );

     int GetLongestDimension( int ext[6] );

     void PrintExtent( std::string name, int ext[6] );

     int NumberOfGhostLayers;
     int DataDescription;
     int GlobalExtent[6];
     int NumberOfPartitions;
     int NumExtents;

     int DuplicateNodes; // indicates whether nodes are duplicated between
                         // partitions, so that they are abutting. This is
                         // set to true by default. If disabled, the resulting
                         // partitions will have gaps.

     bool ExtentIsPartitioned;

     // BTX
     std::vector<int> PartitionExtents;
     // ETX

  private:
    vtkExtentRCBPartitioner( const vtkExtentRCBPartitioner& );// Not implemented
    void operator=( const vtkExtentRCBPartitioner& );// Not implemented
};

#endif /* VTKEXTENTRCBPARTITIONER_H_ */