#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkXMLPolyDataReader.h"
#include "vtkDataSetMapper.h"
#include "vtkPoints.h"
#include "vtkCellArray.h"
#include "vtkIdList.h"
#include "vtkActor.h"
#include "vtkProperty.h"
#include "vtkCamera.h"
#include "vtkTimerLog.h"
#include "vtkDoubleArray.h"
#include "vtkPointLocator.h"
#include "vtkCommand.h"

#include "vtkSmartPointer.h"

#include "vtkCUDAParticleSystem.h"
#include "vtkCUDAMotionEquationSolver.h"

class vtkTimerCallback : public vtkCommand
{
public:
  static vtkTimerCallback *New()
  {
    vtkTimerCallback *cb = new vtkTimerCallback;
    cb->FastTimerId = 0;
    cb->FasterTimerId = 0;
    cb->RenderTimerId = 0;
    return cb;
  }

  virtual void Execute(vtkObject *caller, unsigned long eventId, void *callData)
  {
    vtkTimerLog * timer = vtkTimerLog::New();

    if (vtkCommand::TimerEvent == eventId)
    {
      int tid = * static_cast<int *>(callData);

      if (tid == this->FastTimerId)
      {

      }
      else if (tid == this->FasterTimerId)
      {
        timer->StartTimer();
        this->System->Modified();
        this->System->Update();
        timer->StopTimer();

        std::cout << "[Test] Execution Rate: " << 1/(timer->GetElapsedTime()) << "\n";

      }
      else if (tid == this->RenderTimerId)
      {
        vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::SafeDownCast(caller);
        if (iren && iren->GetRenderWindow() && iren->GetRenderWindow()->GetRenderers())
        {
          iren->Render();
        }
      }
    }
  }

  void SetFastTimerId(int tid)
  {
    this->FastTimerId = tid;
  }

  void SetFasterTimerId(int tid)
  {
    this->FasterTimerId = tid;
  }

  void SetRenderTimerId(int tid)
  {
    this->RenderTimerId = tid;
  }

  void SetSystem(vtkCUDAParticleSystem * bmm)
  {
    this->System = bmm;
  }

  void SetContactIds(vtkIdList * list)
  {
    this->List = list;
  }
private:
  int FastTimerId;
  int RenderTimerId;
  int FasterTimerId;

  vtkIdList * List;

  vtkCUDAParticleSystem * System;
};

int main(int argc, char * argv[])
{
  const char * filename = "";

  if (argc > 1)
  {
    filename = argv[1];
  }
  else
  {
    cout << "This test should at least contain 1 argument.\nUsage: Test $inputFile" << endl;
    exit(0);
  }

  double dt = 0.001;

  vtkXMLPolyDataReader * reader = vtkXMLPolyDataReader::New();
  reader->SetFileName(filename);
  reader->Update();

  vtkPolyData * mesh = reader->GetOutput();

  vtkCUDAParticleSystem* system = vtkCUDAParticleSystem::New();
  system->SetInput(mesh);
  system->SetSolverType(vtkCUDAMotionEquationSolver::RungeKutta4);
  system->SetSpring(150);
  system->SetDistance(10);
  system->SetDamping(5);//Friction
  system->SetMass(.5);
  system->SetTimeStep(dt);//1ms
  system->Init();

  system->Print(cout);

  vtkRenderer * renderer = vtkRenderer::New();

  //Locate contact points
  vtkPointLocator * locator = vtkPointLocator::New();
  double bounds[6];
  mesh->GetBounds(bounds);

  vtkIdList * list = vtkIdList::New();
  double p[3] = {bounds[0], bounds[2], 0};

  locator->SetDataSet(mesh);
  locator->FindClosestNPoints(5, p, list);

  //Set Contact
  double dir[3];
  dir[0] = 0.1;//-0.1;
  dir[1] = 0.2;
  dir[2] = 0;//0.05;

  for(vtkIdType i = 0; i< list->GetNumberOfIds(); i++)
  {
    system->InsertDisplacement(list->GetId(i), dir);
  }

  vtkRenderWindow * renWin = vtkRenderWindow::New();
  renWin->SetSize(500,500);
  renWin->AddRenderer(renderer);

  vtkRenderWindowInteractor * iren = vtkRenderWindowInteractor::New();
  iren->SetRenderWindow(renWin);

  vtkPolyDataMapper * mapper = vtkPolyDataMapper::New();
  mapper->SetInput(mesh);
  mapper->ScalarVisibilityOff();

  vtkActor * actor = vtkActor::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetColor(0,1,0);

  vtkPolyDataMapper * mapper2 = vtkPolyDataMapper::New();
  mapper2->SetInput(system->GetOutput());
  mapper2->ScalarVisibilityOff();

  vtkActor * actor2 = vtkActor::New();
  actor2->SetMapper(mapper2);
  actor2->GetProperty()->SetColor(1,0,0);
  actor2->GetProperty()->SetRepresentationToWireframe();

  renderer->AddActor(actor);
  renderer->AddActor(actor2);
  renderer->SetBackground(1,1,1);

  renderer->ResetCamera();

  iren->Initialize();

  renWin->Render();

  // Sign up to receive TimerEvent:
  //
  vtkTimerCallback *cb = vtkTimerCallback::New();
  iren->AddObserver(vtkCommand::TimerEvent, cb);
  int tid;

  cb->SetSystem(system);

  //Create a faster timer for BMM update
  tid = iren->CreateRepeatingTimer(10);
  cb->SetFasterTimerId(tid);

  // Create a slower repeating timer to trigger Render calls.
  // (This fires at the rate of approximately 25 frames per second.)
  //
  tid = iren->CreateRepeatingTimer(40);
  cb->SetRenderTimerId(tid);

  iren->Start();

  system->Delete();
  mapper->Delete();
  actor->Delete();
  mapper2->Delete();
  actor2->Delete();
  renderer->Delete();
  renWin->Delete();
  iren->Delete();
  return 0;
}