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

  Program:   Visualization Toolkit
  Module:    vtkMultiThreshold.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 (c) Sandia Corporation
 See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
----------------------------------------------------------------------------*/

#ifndef vtkMultiThreshold_h
#define vtkMultiThreshold_h

#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkMultiBlockDataSetAlgorithm.h"
#include "vtkMath.h" // for Inf() and NegInf()

#include <vector> // for lists of threshold rules
#include <map> // for IntervalRules map
#include <set> // for UpdateDependents()
#include <string> // for holding array names in NormKey

class vtkCell;
class vtkCellData;
class vtkDataArray;
class vtkGenericCell;
class vtkPointSet;
class vtkUnstructuredGrid;

class VTKFILTERSGENERAL_EXPORT vtkMultiThreshold : public vtkMultiBlockDataSetAlgorithm
{
public:
  vtkTypeMacro(vtkMultiThreshold,vtkMultiBlockDataSetAlgorithm);
  static vtkMultiThreshold* New();
  virtual void PrintSelf( ostream& os, vtkIndent indent );

  //BTX
  enum Closure {
    OPEN=0,   
    CLOSED=1  
  };
  enum Norm {
    LINFINITY_NORM=-3, 
    L2_NORM=-2,        
    L1_NORM=-1         
  };
  enum SetOperation {
    AND, 
    OR, 
    XOR, 
    WOR, 
    NAND 
  };
  //ETX


  int AddIntervalSet( double xmin, double xmax, int omin, int omax,
    int assoc, const char* arrayName, int component, int allScalars );
  int AddIntervalSet( double xmin, double xmax, int omin, int omax,
    int assoc, int attribType, int component, int allScalars );


  int AddLowpassIntervalSet( double xmax, int assoc, const char* arrayName, int component, int allScalars );
  int AddHighpassIntervalSet( double xmin, int assoc, const char* arrayName, int component, int allScalars );
  int AddBandpassIntervalSet( double xmin, double xmax, int assoc, const char* arrayName, int component, int allScalars );
  int AddNotchIntervalSet( double xlo, double xhi, int assoc, const char* arrayName, int component, int allScalars );

  int AddBooleanSet( int operation, int numInputs, int* inputs );

  int OutputSet( int setId );

  void Reset();

  //BTX
  typedef double (*TupleNorm)( vtkDataArray* arr, vtkIdType tuple, int component );

  // NormKey must be able to use TupleNorm typedef:
  class NormKey;

  // Interval must be able to use NormKey typedef:
  class Interval;

  // Set needs to refer to boolean set pointers
  class BooleanSet;

  class NormKey {
  public:
    int Association; // vtkDataObject::FIELD_ASSOCIATION_POINTS or vtkDataObject::FIELD_ASSOCIATION_CELLS
    int Type; // -1 => use Name, otherwise: vtkDataSetAttributes::{SCALARS, VECTORS, TENSORS, NORMALS, TCOORDS, GLOBALIDS}
    std::string Name; // Either empty or (when ArrayType == -1) an input array name
    int Component; // LINFINITY_NORM, L1_NORM, L2_NORM or an integer component number
    int AllScalars; // For Association == vtkDataObject::FIELD_ASSOCIATION_POINTS, must all points be in the interval?
    int InputArrayIndex; // The number passed to vtkAlgorithm::SetInputArrayToProcess()
    TupleNorm NormFunction; // A function pointer to compute the norm (or fetcht the correct component) of a tuple.

    void ComputeNorm( vtkIdType cellId, vtkCell* cell, vtkDataArray* array, double cellNorm[2] ) const;

    bool operator < ( const NormKey& other ) const {
      if ( this->Association < other.Association )
        return true;
      else if ( this->Association > other.Association )
        return false;

      if ( this->Component < other.Component )
        return true;
      else if ( this->Component > other.Component )
        return false;

      if ( (! this->AllScalars) && other.AllScalars )
        return true;
      else if ( this->AllScalars && (! other.AllScalars) )
        return false;

      if ( this->Type == -1 )
        {
        if ( other.Type == -1 )
          return this->Name < other.Name;
        return true;
        }
      else
        {
        return this->Type < other.Type;
        }
    }
  };

  class Set {
  public:
    int Id; 
    int OutputId; 

    Set() {
      this->OutputId = -1;
    }
    virtual ~Set() { }
    virtual void PrintNodeName( ostream& os );
    virtual void PrintNode( ostream& os ) = 0;
    virtual BooleanSet* GetBooleanSetPointer();
    virtual Interval* GetIntervalPointer();
  };

  class Interval : public Set {
  public:
    double EndpointValues[2];
    int EndpointClosures[2];
    NormKey Norm;

    int Match( double cellNorm[2] );

    virtual ~Interval() { }
    virtual void PrintNode( ostream& os );
    virtual Interval* GetIntervalPointer();
  };

  class BooleanSet : public Set {
  public:
    int Operator;
    std::vector<int> Inputs;

    BooleanSet( int sId, int op, int* inBegin, int* inEnd ) : Inputs( inBegin, inEnd ) {
      this->Id = sId;
      this->Operator = op;
    }
    virtual ~BooleanSet() { }
    virtual void PrintNode( ostream& os );
    virtual BooleanSet* GetBooleanSetPointer();
  };
  //ETX

protected:

  vtkMultiThreshold();
  virtual ~vtkMultiThreshold();

  //BTX

  enum Ruling {
    INCONCLUSIVE=-1,
    INCLUDE=-2,
    EXCLUDE=-3
  };
  //ETX

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

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

  int NextArrayIndex;

  int NumberOfOutputs;

  //BTX
  typedef std::vector<Interval*> IntervalList;
  typedef std::map<NormKey,IntervalList> RuleMap;

  typedef std::vector<int> TruthTreeValues;
  typedef std::vector<TruthTreeValues> TruthTree;

  RuleMap IntervalRules;

  std::vector<Set*> Sets;

  TruthTree DependentSets;


  void UpdateDependents(
    int id, std::set<int>& unresolvedOutputs, TruthTreeValues& setStates,
    vtkCellData* inCellData, vtkIdType cellId, vtkGenericCell* cell, std::vector<vtkUnstructuredGrid*>& outv );

  int AddIntervalSet( NormKey& nk, double xmin, double xmax, int omin, int omax );

  //ETX

  void PrintGraph( ostream& os );

  vtkMultiThreshold( const vtkMultiThreshold& ); // Not implemented.
  void operator = ( const vtkMultiThreshold& ); // Not implemented.
};

inline int vtkMultiThreshold::AddLowpassIntervalSet( double xmax, int assoc, const char* arrayName, int component, int allScalars )
{
  return this->AddIntervalSet( vtkMath::NegInf(), xmax, CLOSED, CLOSED, assoc, arrayName, component, allScalars );
}

inline int vtkMultiThreshold::AddHighpassIntervalSet( double xmin, int assoc, const char* arrayName, int component, int allScalars )
{
  return this->AddIntervalSet( xmin, vtkMath::Inf(), CLOSED, CLOSED, assoc, arrayName, component, allScalars );
}

inline int vtkMultiThreshold::AddBandpassIntervalSet(
  double xmin, double xmax, int assoc, const char* arrayName, int component, int allScalars )
{
  return this->AddIntervalSet( xmin, xmax, CLOSED, CLOSED, assoc, arrayName, component, allScalars );
}

inline int vtkMultiThreshold::AddNotchIntervalSet(
  double xlo, double xhi, int assoc, const char* arrayName, int component, int allScalars )
{
  int band = this->AddIntervalSet( xlo, xhi, CLOSED, CLOSED, assoc, arrayName, component, allScalars );
  if ( band < 0 )
    {
    return -1;
    }
  return this->AddBooleanSet( NAND, 1, &band );
}

inline vtkMultiThreshold::Interval* vtkMultiThreshold::Set::GetIntervalPointer()
{
  return 0;
}

inline vtkMultiThreshold::BooleanSet* vtkMultiThreshold::Set::GetBooleanSetPointer()
{
  return 0;
}

inline vtkMultiThreshold::Interval* vtkMultiThreshold::Interval::GetIntervalPointer()
{
  return this;
}

inline vtkMultiThreshold::BooleanSet* vtkMultiThreshold::BooleanSet::GetBooleanSetPointer()
{
  return this;
}

#endif // vtkMultiThreshold_h