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

  Program:   Visualization Toolkit
  Module:    MantaBenchmark.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.

=========================================================================*/
// This test covers the manta vs openGL render speed

//TODO: Measure pipeline change and render setup time
//TODO: Make it run and compile without MPI

#include <mpi.h>

#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkClipPolyData.h"
#include "vtkCompositeRenderManager.h"
#include "vtkElevationFilter.h"
#include "vtkMantaTestSource.h"
#include "vtkMPICommunicator.h"
#include "vtkMPIController.h"
#include "vtkObjectFactory.h"
#include "vtkPlane.h"
#include "vtkPolyDataMapper.h"
#include "vtkProcess.h"
#include "vtkProperty.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSphereSource.h"
#include "vtkTestUtilities.h"
#include "vtkTimerLog.h"
#include "vtkPLYWriter.h"

#include "vtkMantaRenderer.h"
#include "vtkMantaActor.h"
#include "vtkMantaPolyDataMapper.h"

#include <assert.h>

#include "vtkSmartPointer.h"

#define VTK_CREATE(type, name) \
  vtkSmartPointer<type> name = vtkSmartPointer<type>::New()

vtkPlane* plane = NULL;
vtkElevationFilter *elev = NULL;

// call back to set the clip plane location value.
void PlaceClipRMI(void *localArg, void* remoteArg, 
                  int vtkNotUsed(remoteArgLen), int vtkNotUsed(id))
{ 
  double*origin = (double*)remoteArg;
  if (plane)
    {
    plane->SetOrigin(origin[0], origin[1], origin[2]);
    }
}

// call back to set the clip plane orientation
void OrientClipRMI(void *localArg, void* remoteArg, 
                   int vtkNotUsed(remoteArgLen), int vtkNotUsed(id))
{ 

  double*normal = (double*)remoteArg;
  if (plane)
    {
    plane->SetNormal(normal[0], normal[1], normal[2]);
    }
}

// call back to set the elevation filter orientation
void OrientElevRMI(void *localArg, void* remoteArg, 
                   int vtkNotUsed(remoteArgLen), int vtkNotUsed(id))
{ 
  double*segment = (double*)remoteArg;
  if (segment)
    {
    elev->SetLowPoint(segment[0], segment[1], segment[2]);
    elev->SetHighPoint(segment[3], segment[4], segment[5]);
    }
}

class MyProcess : public vtkProcess
{
public:
  static MyProcess *New();
  ~MyProcess()
  {
    this->Timer->Delete();
  }

  vtkTypeMacro(MyProcess, vtkProcess);
  
  virtual void Execute();

  void SetArgs(int anArgc,
               char *anArgv[])
    {
      this->Argc=anArgc;
      this->Argv=anArgv;  

      this->Frame = 0;
      this->PrepFrames = 0;
      this->PrepTime = 0.0;
      this->RenderTime = 0.0;
      this->CompositeTime = 0.0;
      this->AllTime = 0.0;
    }  
  void NoteTime(vtkParallelRenderManager *prm, bool SetupFrame)
  {
    this->Timer->StopTimer();
    double allTime = this->Timer->GetElapsedTime();

    double renTime = prm->GetRenderTime();
    double prepTime = 0.0;
    if (SetupFrame)
      {
      prepTime = renTime;
      renTime = 0.0;
      }
    double compTime = prm->GetImageProcessingTime();
    cerr << this->Frame << " "
         << renTime << " "
         << compTime << " "
         << allTime << endl;
    
    if (SetupFrame)
      {
      this->PrepFrames++;
      }
    else
      {
      this->Frame++;
      }
    this->RenderTime += renTime;
    this->CompositeTime += compTime;
    this->AllTime += allTime;
    this->PrepTime += prepTime;
    this->Timer->StartTimer();
  }
  void StartTime()
  {
    this->Timer->StartTimer();
  }
  void PrintStats()
  {
    if (this->PrepFrames != 0)
      {
      cerr << "avg_prep_time " << this->PrepTime/this->PrepFrames << endl;
      }
    if (this->Frame != 0)
      {
      cerr << "avg_render_time " << this->RenderTime/this->Frame << endl;
      }
    if (this->AllTime != 0.0)
      {
      cerr << "avg_composite_time " << this->CompositeTime/(this->Frame+this->PrepFrames) << endl;
      cerr << "avg_framerate " << (this->Frame+this->PrepFrames)/this->AllTime << endl;
      }
  }


protected:
  MyProcess();
  
  int Argc;
  char **Argv;
  int Frame;
  int PrepFrames;
  double PrepTime; //an approximation, assumes whole first frame is prep and not rendering
  double RenderTime;
  double CompositeTime;
  double AllTime;
  vtkTimerLog *Timer;
};

vtkStandardNewMacro(MyProcess);

MyProcess::MyProcess()
{
  this->Argc=0;
  this->Argv=0;
  this->Timer = vtkTimerLog::New();
  this->Frame = 0;
  this->RenderTime = 0.0;
  this->CompositeTime = 0.0;
  this->AllTime = 0;
}

void MyProcess::Execute()
{
  //parse environment and arguments
  int numProcs=this->Controller->GetNumberOfProcesses();
  int me=this->Controller->GetLocalProcessId();
  bool changeData = true;
  bool changeCamera = true;
  int screensize = 400;
  int triangles = 100000;
  double fuzziness = 0.0;
  int AStype = 0;
  int threads = 1;
  int processes = numProcs;
  bool useGL = false;
  bool useDisplayList = false;

  long unsigned int kB = 0;

  for (int i = 0; i < this->Argc; i++)
    {
    if (!strcmp(this->Argv[i], "-triangles"))
      {
      triangles = atoi(this->Argv[i+1]);
      }
    if (!strcmp(this->Argv[i], "-fuzziness"))
      {
      fuzziness = atof(this->Argv[i+1]);
      }
    if (!strcmp(this->Argv[i], "-threads"))
      {
      threads = atoi(this->Argv[i+1]);
      }
    if (!strcmp(this->Argv[i], "-asType"))
      {
      AStype = atoi(this->Argv[i+1]);
      }
    if (!strcmp(this->Argv[i], "-useGL"))
      {
      useGL = true;
      }
    if (!strcmp(this->Argv[i], "-useDisplayList"))
      {
      useDisplayList = true;
      }
    if (!strcmp(this->Argv[i], "-screensize"))
      {
      screensize = atoi(this->Argv[i+1]);
      }
    if (!strcmp(this->Argv[i], "-noCamera"))
      {
      changeCamera = false;
      }
    if (!strcmp(this->Argv[i], "-noChanges"))
      {
      changeData = false;
      }
    }

  //Make a scene that has a configurable number of triangles
  //and that we can change
  double bds[6];
  vtkMantaTestSource *source=vtkMantaTestSource::New();
  source->SetResolution(triangles);
  source->SetSlidingWindow(fuzziness);
#if 0
  //for comparison with Manta standalone
  vtkPLYWriter *writer = vtkPLYWriter::New();
  writer->SetInputConnection(source->GetOutputPort(0));
  char buff[120];
  sprintf(buff, "mesh_%d.ply", triangles);
  cerr << buff << endl;
  writer->SetFileName(buff);
  writer->Write();
  writer->Delete();
  exit(0);
#endif

  //Compute local geometric bounds
  source->UpdatePiece(me, numProcs, 0);
  source->GetOutput()->GetBounds(bds);
  /*
  cerr << "LBDS(" << me << ") "  
       << bds[0] << ","<< bds[1] << ","
       << bds[2] << ","<< bds[3] << ","
       << bds[4] << ","<< bds[5] << endl;
  */
  vtkClipPolyData *clipper = vtkClipPolyData::New();
  clipper->SetInputConnection(source->GetOutputPort());
  plane = vtkPlane::New();
  clipper->SetClipFunction(plane);
  source->Delete();

  elev = vtkElevationFilter::New();
  elev->SetInputConnection(clipper->GetOutputPort());
  clipper->Delete();

  vtkPolyDataMapper *mapper=NULL;
  if (useGL)
    {
    mapper = vtkPolyDataMapper::New();
    mapper->SetImmediateModeRendering(!useDisplayList);
    }
  else
    {
    mapper = vtkMantaPolyDataMapper::New();
    }
  mapper->SetInputConnection(elev->GetOutputPort());
  mapper->SetPiece(me); //each processor makes a different part of the data
  mapper->SetNumberOfPieces(numProcs);

  //Now set up parallel display pipeline to show it
  vtkCompositeRenderManager *prm = vtkCompositeRenderManager::New();   

  vtkRenderWindowInteractor *iren=NULL;
  vtkRenderWindow *renWin = vtkRenderWindow::New();
  renWin->SetMultiSamples(0);
  if(me==0)
    {
    iren=vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);
    }
  renWin->SetSize(screensize, screensize);
  renWin->SetPosition(0, (screensize+60)*me); // translate the window
  
  vtkRenderer *renderer = NULL;
  vtkMantaRenderer *mRenderer = NULL;
  if (useGL)
    {
    renderer = vtkRenderer::New();
    }
  else
    {
    mRenderer = vtkMantaRenderer::New();
    mRenderer->SetNumberOfWorkers(threads);
    renderer = mRenderer;
    }

  renWin->AddRenderer(renderer);
  prm->SetRenderWindow(renWin);

  vtkActor *actor = NULL;
  if (useGL)
    {
    actor = vtkActor::New();

    //quick way to be sure which one is actually rendering
    //vtkProperty *prop = actor->GetProperty();
    //prop->SetRepresentationToWireframe();
    
    }
  else
    {
    vtkMantaActor *act = vtkMantaActor::New();
    act->SetSortType(AStype);
    actor = act;
    }

  actor->SetMapper(mapper);

  renderer->AddViewProp(actor);
  actor->Delete();
  renderer->Delete();

  prm->SetRenderWindow(renWin);
  prm->SetController(this->Controller);    

  int retVal;
  const int MY_RETURN_VALUE_MESSAGE=0x518113;
  const int ORIGIN_RMI=0x518114;
  const int PLANE_RMI=0x518115;
  const int ELEV_RMI=0x518116;
  const int SETUP_BOUNDS=0x518117;
  if(me>0)
    {
    //Figure out global bounds so we can use it for filters/viewpoints
    this->Controller->Send(bds, 6, 0, SETUP_BOUNDS);

    // Last, set up RMI call backs to change pipeline parameters
    // camera changes are handled by the prm
    this->Controller->AddRMI(PlaceClipRMI, NULL, ORIGIN_RMI);
    this->Controller->AddRMI(OrientClipRMI, NULL, PLANE_RMI);
    this->Controller->AddRMI(OrientElevRMI, NULL, ELEV_RMI);

    // satellite nodes, start loop that receives and responds to window events
    // from root
    prm->StartServices(); 

    // receive return value from root process.
    this->Controller->Receive(&retVal, 1, 0, MY_RETURN_VALUE_MESSAGE);
    }
  else
    {
    //root node drives all the action, everyone else just does what it is told
    double origin[3];
    double normal[3];
    double segment[6];

    //Figure out global bounds so we can use it for filters/viewpoints
    for (int p = 1; p < numProcs; ++p)
      {
      double rbds[6];
      this->Controller->Receive(rbds, 6, p, SETUP_BOUNDS);
      /*
      cerr << "RBDS " 
           << rbds[0] << ","<< rbds[1] << ","
           << rbds[2] << ","<< rbds[3] << ","
           << rbds[4] << ","<< rbds[5] << endl;
      */
      for (int i = 0; i < 3; i++)
        {
        if (rbds[i*2+0] < bds[i*2+0])
          {
          bds[i*2+0] = rbds[i*2+0];
          }
        if (rbds[i*2+1] > bds[i*2+1])
          {
          bds[i*2+1] = rbds[i*2+1];
          }
        }
      }
    /*
    cerr << "GDS " 
         << bds[0] << ","<< bds[1] << ","
         << bds[2] << ","<< bds[3] << ","
         << bds[4] << ","<< bds[5] << endl;
    */

    //set colors to show Z initially
    segment[0] = 0;
    segment[1] = 0;
    segment[2] = bds[4];
    segment[3] = 0;
    segment[4] = 0;
    segment[5] = bds[5];
    elev->SetLowPoint(segment[0], segment[1], segment[2]);
    elev->SetHighPoint(segment[3], segment[4], segment[5]);
    for (int p = 1; p < numProcs; ++p)
      {
      this->Controller->TriggerRMI
        (p,(void*)segment,6*sizeof(double),ELEV_RMI);
      }        

    //Playback some canned camera and data manipulations
    vtkCamera *camera=renderer->GetActiveCamera();
    renderer->ResetCamera(bds);

    //move plane off data so entire thing is visible
    origin[0] = bds[0];
    origin[1] = bds[2];
    origin[2] = bds[4];
    plane->SetOrigin(origin[0], origin[1], origin[2]);
    normal[0] = 1;
    normal[1] = 0;
    normal[2] = 0;
    plane->SetNormal(normal[0],normal[1],normal[2]);
    for (int p = 1; p < numProcs; ++p)
      {
      this->Controller->TriggerRMI
        (p,(void*)origin,3*sizeof(double),ORIGIN_RMI);
      this->Controller->TriggerRMI
        (p,(void*)normal,3*sizeof(double),PLANE_RMI);
      }        

    this->StartTime(); //start benchmarking Rendering now

    // initial render
    renWin->Render();
    this->NoteTime(prm, true);
    kB = mapper->GetInputAsDataSet()->GetActualMemorySize();

    //Change elevation filter's parameter to test color transfer function
    for (int i=2; i>-1; i--)
      {
      if (changeData)
        {
        cerr << "Color shows " 
             << ((i==0)?"X":"") 
             << ((i==1)?"Y":"") 
             << ((i==2)?"Z":"") << endl;
        
        segment[0] = 0;
        segment[1] = 0;
        segment[2] = 0;
        segment[3] = 0;
        segment[4] = 0;
        segment[5] = 0;
        segment[i] = bds[i*2+0];
        segment[i+3] = bds[i*2+1];
        
        elev->SetLowPoint(segment[0], segment[1], segment[2]);
        elev->SetHighPoint(segment[3], segment[4], segment[5]);
        for (int p = 1; p < numProcs; ++p)
          {
          this->Controller->TriggerRMI
            (p,(void*)segment,6*sizeof(double),ELEV_RMI);
          }      
        }  
      // render
      renWin->Render();
      this->NoteTime(prm, changeData);
      //Move the camera and render a bunch of frames to measure rerender time
      //TODO: Make step size configurable
      double direction = 20.0;
      if (i==1)
        {
        direction = direction * -1.0;
        }
      for (int f = 0; f < 18 && changeCamera; f++)
        {        
        camera->Azimuth(direction);
        renderer->ResetCameraClippingRange(bds);
        renWin->Render();
        this->NoteTime(prm, false);
        }
      }

    //put initial clip plane in the middle of the data...
    if (changeData)
      {     
      origin[0] = (bds[0]+bds[1])*0.5;
      origin[1] = (bds[2]+bds[3])*0.5;
      origin[2] = (bds[4]+bds[5])*0.5;
      plane->SetOrigin(origin[0], origin[1], origin[2]); //...locally
      for (int p = 1; p < numProcs; ++p)
        {
        this->Controller->TriggerRMI
          (p,(void*)origin,3*sizeof(double),ORIGIN_RMI); //...and on remotes
        }
      }

    //Change a clip filter's parameter to measure render setup time
    for (int i=2; i>-1; i--)
      {
      if (changeData)
        {
        cerr << "Clip off " 
             << ((i==0)?"X":"") 
             << ((i==1)?"Y":"") 
             << ((i==2)?"Z":"") << endl;
        
        normal[0] = 0;
        normal[1] = 0;
        normal[2] = 0;
        normal[i] = 1;
        plane->SetNormal(normal[0],normal[1],normal[2]);
        for (int p = 1; p < numProcs; ++p)
          {
          this->Controller->TriggerRMI
            (p,(void*)normal,3*sizeof(double),PLANE_RMI);
          }      
        }  
      // render
      renWin->Render();
      this->NoteTime(prm, changeData);

      //Move the camera and render a bunch of frames to measure rerender time
      //TODO: Make step size configurable
      double direction = 20.0;
      if (i==1)
        {
        direction = direction * -1.0;
        }
      for (int f = 0; f < 18 && changeCamera; f++)
        {        
        camera->Azimuth(direction);
        renderer->ResetCameraClippingRange(bds);
        renWin->Render();
        this->NoteTime(prm, false);
        }
      }

    //TODO: should also test with camera zoomed in

    //double thresh=10;
    int i;
    VTK_CREATE(vtkTesting, testing);
    for (i = 0; i < this->Argc; ++i)
      {
      testing->AddArgument(this->Argv[i]);
      }
    
    if (testing->IsInteractiveModeSpecified())
      {
      //Let user manipulate view manually
      retVal=vtkTesting::DO_INTERACTOR;
      iren->Start();
      }
    else
      {
      //the purpose of this test is to measure timing
      //image comparisons are not needed for that
      //flaws will show up when speed is drastically faster/slower than before
      retVal=1;
      renWin->Render();
      }

    prm->StopServices(); // tells satellites to stop listening.
    
    // send the return value to the satellites
    i=1;
    while(i<numProcs)
      {
      this->Controller->Send(&retVal, 1, i, MY_RETURN_VALUE_MESSAGE);
      ++i;
      }
    iren->Delete();

    cerr << "processes " << processes << endl;
    cerr << "threads " << (useGL?1:threads) << endl;
    cerr << "screensize " << screensize << endl;
    cerr << "triangles " << triangles << endl;
    cerr << "fuzziness " << fuzziness << endl;
    cerr << "kB " << kB << endl;
    cerr << "render_with " << (useGL?"GL":"Manta") << endl;
    if (useGL)
      {
      cerr << "display_lists " << (useDisplayList?"ON":"OFF") << endl;
      }
    if (!useGL)
      {
      cerr << "accel_structure " << AStype << endl;
      }
    this->PrintStats();
    }

  mapper->Delete();
  renWin->Delete();
  prm->Delete();
  elev->Delete();
  plane->Delete();
  this->ReturnValue=retVal;
}

int MantaBenchmark(int argc, char **argv)
{
  // This is here to avoid false leak messages from vtkDebugLeaks when
  // using mpich. It appears that the root process which spawns all the
  // main processes waits in MPI_Init() and calls exit() when
  // the others are done, causing apparent memory leaks for any objects
  // created before MPI_Init().
  MPI_Init(&argc, &argv);

  // Note that this will create a vtkMPIController if MPI
  // is configured, vtkThreadedController otherwise.
  vtkMPIController *contr = vtkMPIController::New();
  contr->Initialize(&argc, &argv, 1);

  int retVal = 1; //1==failed

  vtkMultiProcessController::SetGlobalController(contr);

  int me = contr->GetLocalProcessId();
  if (!contr->IsA("vtkMPIController"))
    {
    if (me == 0)
      {
      cout << "DistributedData test requires MPI" << endl;
      }
    contr->Delete();
    return retVal;
    }

  MyProcess *p=MyProcess::New();
  p->SetArgs(argc,argv);
  
  contr->SetSingleProcessObject(p);
  contr->SingleMethodExecute();
  
  retVal=p->GetReturnValue();
  p->Delete();
  contr->Finalize();
  contr->Delete();

  return !retVal;
}
