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

  Program:   Visualization Toolkit
  Module:    vtkHyperTreeGridAlgorithm.cxx

  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.

=========================================================================*/
#include "vtkHyperTreeGridAlgorithm.h"

#include "vtkBitArray.h"
#include "vtkCommand.h"
#include "vtkDataSetAttributes.h"
#include "vtkHyperTreeGrid.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPolyData.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkUnstructuredGrid.h"

//----------------------------------------------------------------------------
vtkHyperTreeGridAlgorithm::vtkHyperTreeGridAlgorithm()
{
  // By default, only one input and one output ports
  this->SetNumberOfInputPorts( 1 );
  this->SetNumberOfOutputPorts( 1 );

  // Keep references to input and output data
  this->InData = nullptr; //todo: should be a safer pointer type
  this->OutData = nullptr;
}

//----------------------------------------------------------------------------
vtkHyperTreeGridAlgorithm::~vtkHyperTreeGridAlgorithm()
{
  this->InData = nullptr;
  this->OutData = nullptr;
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::PrintSelf( ostream& os, vtkIndent indent )
{
  this->Superclass::PrintSelf( os, indent );

  if( this->InData )
  {
    os << indent << "InData:\n";
    this->InData->PrintSelf( os, indent.GetNextIndent() );
  }
  else
  {
    os << indent << "InData: ( none )\n";
  }

  os << indent << "OutData: ";
  if ( this->OutData )
  {
    this->OutData->PrintSelf( os, indent );
  }
  else
  {
    os << "(none)" << endl;
  }
}

//----------------------------------------------------------------------------
vtkDataObject* vtkHyperTreeGridAlgorithm::GetOutput()
{
  return this->GetOutput( 0 );
}

//----------------------------------------------------------------------------
vtkDataObject* vtkHyperTreeGridAlgorithm::GetOutput( int port )
{
  return this->GetOutputDataObject( port );
}

//----------------------------------------------------------------------------
vtkHyperTreeGrid* vtkHyperTreeGridAlgorithm::GetHyperTreeGridOutput()
{
  return this->GetHyperTreeGridOutput( 0 );
}

//----------------------------------------------------------------------------
vtkHyperTreeGrid* vtkHyperTreeGridAlgorithm::GetHyperTreeGridOutput( int port )
{
  return vtkHyperTreeGrid::SafeDownCast( this->GetOutputDataObject( port ) );
}

//----------------------------------------------------------------------------
vtkPolyData* vtkHyperTreeGridAlgorithm::GetPolyDataOutput()
{
  return this->GetPolyDataOutput( 0 );
}

//----------------------------------------------------------------------------
vtkPolyData* vtkHyperTreeGridAlgorithm::GetPolyDataOutput( int port )
{
  return vtkPolyData::SafeDownCast( this->GetOutputDataObject( port ) );
}

//----------------------------------------------------------------------------
vtkUnstructuredGrid* vtkHyperTreeGridAlgorithm::GetUnstructuredGridOutput()
{
  return this->GetUnstructuredGridOutput( 0 );
}

//----------------------------------------------------------------------------
vtkUnstructuredGrid* vtkHyperTreeGridAlgorithm::GetUnstructuredGridOutput( int port )
{
  return vtkUnstructuredGrid::SafeDownCast( this->GetOutputDataObject( port ) );
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::SetOutput( vtkDataObject* d )
{
  this->GetExecutive()->SetOutputData( 0, d );
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::ProcessRequest( vtkInformation* request,
                                               vtkInformationVector** inputVector,
                                               vtkInformationVector* outputVector )
{
  // generate the data
  if( request->Has(vtkDemandDrivenPipeline::REQUEST_DATA() ) )
  {
    return this->RequestData( request, inputVector, outputVector );
  }

  if( request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT() ) )
  {
    return this->RequestUpdateExtent( request, inputVector, outputVector );
  }

  // execute information
  if( request->Has(vtkDemandDrivenPipeline::REQUEST_INFORMATION() ) )
  {
    return this->RequestInformation( request, inputVector, outputVector );
  }

  return this->Superclass::ProcessRequest( request, inputVector, outputVector );
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::FillInputPortInformation( int, vtkInformation* info)
{
  info->Set( vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkHyperTreeGrid" );
  return 1;
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::FillOutputPortInformation( int, vtkInformation* info )
{
  info->Set( vtkDataObject::DATA_TYPE_NAME(), "vtkDataObject" );
  return 1;
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::RequestInformation( vtkInformation*,
                                                   vtkInformationVector**,
                                                   vtkInformationVector* )
{
  // Do nothing and let subclasses handle it if needed
  return 1;
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::RequestUpdateExtent( vtkInformation*,
                                                    vtkInformationVector** inputVector,
                                                    vtkInformationVector* )
{
  int numInputPorts = this->GetNumberOfInputPorts();
  for ( int i = 0; i < numInputPorts; ++ i )
  {
    int numInputConnections = this->GetNumberOfInputConnections( i );
    for (int j = 0; j < numInputConnections; ++ j )
    {
      vtkInformation* inputInfo = inputVector[i]->GetInformationObject( j );
      inputInfo->Set( vtkStreamingDemandDrivenPipeline::EXACT_EXTENT(), 1 );
    }
  }
  return 1;
}

//----------------------------------------------------------------------------
int vtkHyperTreeGridAlgorithm::RequestData( vtkInformation* vtkNotUsed(request),
                                            vtkInformationVector** inputVector,
                                            vtkInformationVector* outputVector )
{
  // Update progress
  this->UpdateProgress( 0. );

  // Retrieve input and output
  vtkHyperTreeGrid* input = vtkHyperTreeGrid::GetData( inputVector[0], 0 );
  if ( ! input )
  {
    vtkErrorMacro( "No input available. Cannot proceed with hyper tree grid algorithm." );
    return 0;
  }
  vtkDataObject* outputDO = vtkDataObject::GetData( outputVector, 0 );
  if ( ! outputDO )
  {
    vtkErrorMacro( "No output available. Cannot proceed with hyper tree grid algorithm." );
    return 0;
  }

  // Process all trees in input grid and generate input data object
  if ( ! this->ProcessTrees( input, outputDO ) )
  {
    return 0;
  }

  // Squeeze output data if present
  if ( this->OutData )
  {
    this->OutData->Squeeze();
  }

  // Update progress and return
  this->UpdateProgress( 1. );
  return 1;
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::SetInputData( vtkDataObject* input )
{
  this->SetInputData( 0, input );
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::SetInputData( int index, vtkDataObject* input )
{
  this->SetInputDataInternal( index, input );
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::AddInputData( vtkDataObject* input )
{
  this->AddInputData( 0, input );
}

//----------------------------------------------------------------------------
void vtkHyperTreeGridAlgorithm::AddInputData( int index, vtkDataObject* input )
{
  this->AddInputDataInternal( index, input );
}