#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkPolyDataWriter.h"
#include "vtkDataSetMapper.h"
#include "vtkPoints.h"
#include "vtkCellArray.h"
#include "vtkIdList.h"
#include "vtkActor.h"
#include "vtkActor.h"
#include "vtkProperty.h"
#include "vtkCamera.h"

#include "vtkPolyData.h"
#include "vtkPolyDataWriter.h"
#include "vtkXMLPolyDataReader.h"

#include "vtkTimerLog.h"
#include "vtkPointLocator.h"

#include "vtkSmartPointer.h"
#include "vtkCommand.h"

#include "vtkParticleSpringSystem.h"

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

  virtual void Execute(vtkObject *caller, unsigned long eventId, void *callData)
  {
    if (vtkCommand::TimerEvent == eventId)
    {
      int tid = * static_cast<int *>(callData);

      if (tid == this->FastTimerId)
      {
        cout << "new collision\n";

        vtkPolyData * mesh = vtkPolyData::SafeDownCast(this->DeformationModel->GetInput());

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

        double p[3] = {bounds[0], 0, 0};

        vtkIdList * list = vtkIdList::New();
        locator->SetDataSet(mesh);
        locator->FindClosestNPoints(5, p, list);

        //Set Collisions
        double force[3];
        force[0] = 0.15;//-0.1;
        force[1] = 0.05;
        force[2] = 0;//0.05;

        for(vtkIdType i = 0; i< list->GetNumberOfIds(); i++)
        {
          int id = list->GetId(i);
          this->DeformationModel->InsertDisplacement(id, force);
        }
      }
      else if (tid == this->FasterTimerId)
      {
        vtkTimerLog * timer = vtkTimerLog::New();
        timer->StartTimer();
        this->DeformationModel->Modified();
        this->DeformationModel->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 SetDeformationModel(vtkParticleSpringSystem * DeformationModel)
  {
    this->DeformationModel = DeformationModel;
  }

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

  vtkIdList * List;

  vtkParticleSpringSystem * DeformationModel;
};

int main(int argc, char * argv[])
{
  const char * filename = "/home/jballesteros/Workspace/data/vtkESQuiData/Scenario/Organs/ball_def_c10.vtp";

  if (argc > 1)
  {
    filename = argv[1];
  }

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

  vtkSmartPointer<vtkParticleSpringSystem> def = vtkSmartPointer<vtkParticleSpringSystem>::New();
  def->SetInputConnection(reader->GetOutputPort());
  def->SetSolverType(vtkMotionEquationSolver::VelocityVerlet);
  def->SetSpring(150);
  def->SetDistance(10);
  def->SetDamping(5);//Friction
  def->SetMass(.5);
  def->SetTimeStep(0.001);//1ms
  def->Initialize();
  def->GetOutput()->Print(cout);

  vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();

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

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

  vtkSmartPointer<vtkPolyDataMapper> mapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(reader->GetOutputPort());

  vtkSmartPointer<vtkActor> actor =
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetColor(0,1,0);
  actor->GetProperty()->SetOpacity(0.5);

  vtkSmartPointer<vtkPolyDataMapper> mapper2 =
        vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper2->SetInputConnection(def->GetOutputPort());

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

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

  renderer->ResetCamera();
  iren->Initialize();

  renWin->Render();

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

  cb->SetDeformationModel(def);

  //Create a faster timer for DeformationModel update
  tid = iren->CreateRepeatingTimer(1);
  cb->SetFasterTimerId(tid);

  //Create a collision every 5 seconds
  tid = iren->CreateRepeatingTimer(5000);
  cb->SetFastTimerId(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();

  return 0;
}