// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkCompositeDataDisplayAttributes.h"
#include "vtkCompositeDataSet.h"
#include "vtkCompositePolyDataMapper.h"
#include "vtkCullerCollection.h"
#include "vtkInformation.h"
#include "vtkMath.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkNew.h"
#include "vtkProperty.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkRenderingOpenGLConfigure.h"
#include "vtkSmartPointer.h"
#include "vtkTimerLog.h"
#include "vtkTrivialProducer.h"

#include <vtkRegressionTestImage.h>
#include <vtkTestUtilities.h>

#include <iostream>

#define syntheticData
#ifdef syntheticData
#include "vtkCylinderSource.h"
#else
#include "vtkXMLMultiBlockDataReader.h"
#endif

int TestCompositePolyDataMapper(int argc, char* argv[])
{
  bool timeit = false;
  if (argc > 1 && argv[1] && !strcmp(argv[1], "-timeit"))
  {
    timeit = true;
  }
  vtkSmartPointer<vtkRenderWindow> win = vtkSmartPointer<vtkRenderWindow>::New();
  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  vtkSmartPointer<vtkRenderer> ren = vtkSmartPointer<vtkRenderer>::New();
  win->AddRenderer(ren);
  win->SetInteractor(iren);

  vtkSmartPointer<vtkCompositePolyDataMapper> mapper =
    vtkSmartPointer<vtkCompositePolyDataMapper>::New();
  vtkNew<vtkCompositeDataDisplayAttributes> cdsa;
  mapper->SetCompositeDataDisplayAttributes(cdsa.GetPointer());

#ifdef syntheticData

  int resolution = 18;
  vtkNew<vtkCylinderSource> cyl;
  cyl->CappingOn();
  cyl->SetRadius(0.2);
  cyl->SetResolution(resolution);

  // build a composite dataset
  vtkNew<vtkMultiBlockDataSet> data;
  int blocksPerLevel[3] = { 1, 32, 64 };
  if (timeit)
  {
    blocksPerLevel[1] = 64;
    blocksPerLevel[2] = 256;
  }
  std::vector<vtkSmartPointer<vtkMultiBlockDataSet>> blocks;
  blocks.emplace_back(data.GetPointer());
  unsigned levelStart = 0;
  unsigned levelEnd = 1;
  int numLevels = sizeof(blocksPerLevel) / sizeof(blocksPerLevel[0]);
  int numLeaves = 0;
  int numNodes = 0;
  std::string blockName("Rolf");
  mapper->SetInputDataObject(data.GetPointer());
  for (int level = 1; level < numLevels; ++level)
  {
    int nblocks = blocksPerLevel[level];
    for (unsigned parent = levelStart; parent < levelEnd; ++parent)
    {
      blocks[parent]->SetNumberOfBlocks(nblocks);
      for (int block = 0; block < nblocks; ++block, ++numNodes)
      {
        if (level == numLevels - 1)
        {
          vtkNew<vtkPolyData> child;
          cyl->SetCenter(block * 0.25, 0.0, parent * 0.5);
          cyl->Update();
          child->DeepCopy(cyl->GetOutput(0));
          blocks[parent]->SetBlock(block, (block % 2) ? nullptr : child.GetPointer());
          blocks[parent]->GetMetaData(block)->Set(vtkCompositeDataSet::NAME(), blockName.c_str());
          // test not setting it on some
          if (block % 11)
          {
            double rgb[3];
            vtkMath::HSVToRGB(0.8 * block / nblocks, 0.2 + 0.8 * ((parent - levelStart) % 8) / 7.0,
              1.0, rgb + 0, rgb + 1, rgb + 2);
            mapper->SetBlockColor(parent + numLeaves + 1, rgb);
            //            mapper->SetBlockOpacity(parent+numLeaves, (block + 3) % 7 == 0 ? 0.3
            //            : 1.0);
            mapper->SetBlockVisibility(parent + numLeaves, (block % 7) != 0);
          }
          ++numLeaves;
        }
        else
        {
          vtkNew<vtkMultiBlockDataSet> child;
          blocks[parent]->SetBlock(block, child.GetPointer());
          blocks.emplace_back(child.GetPointer());
        }
      }
    }
    levelStart = levelEnd;
    levelEnd = static_cast<unsigned>(blocks.size());
  }

#else

  vtkNew<vtkXMLMultiBlockDataReader> reader;
  reader->SetFileName(
    "/home/local/KHQ/jaswant.panchumarti/Documents/internal-vtk-data/stargate.vtm");
  mapper->SetInputConnection(reader->GetOutputPort(0));

  // stargate seems to have cell scalars but all white cell scalars
  // are slow slow slow so do not use the unless they add value
  mapper->ScalarVisibilityOff();

  // comment the following in/out for worst/best case
  // for (int i = 0; i < 20000; ++i)
  // {
  //   double r, g, b;
  //   vtkMath::HSVToRGB(0.8*(i%100)/100.0, 1.0, 1.0, &r, &g, &b);
  //   mapper->SetBlockColor(i, r, g, b);
  // }

#endif

  vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
  actor->GetProperty()->SetEdgeColor(1, 0, 0);
  //  actor->GetProperty()->EdgeVisibilityOn();
  ren->AddActor(actor);
  win->SetSize(400, 400);

  ren->RemoveCuller(ren->GetCullers()->GetLastItem());
  ren->ResetCamera();

  vtkSmartPointer<vtkTimerLog> timer = vtkSmartPointer<vtkTimerLog>::New();
  win->Render(); // get the window up

#ifdef syntheticData
  // modify the data to force a rebuild of OpenGL structs
  // after rendering set one cylinder to white
  mapper->SetBlockColor(1011, 1.0, 1.0, 1.0);
  mapper->SetBlockOpacity(1011, 1.0);
  mapper->SetBlockVisibility(1011, 1.0);
#endif

  timer->StartTimer();
  win->Render();
  timer->StopTimer();
  std::cout << "First frame time: " << timer->GetElapsedTime() << "\n";

  timer->StartTimer();

  int numFrames = (timeit ? 300 : 2);
  for (int i = 0; i <= numFrames; i++)
  {
    ren->GetActiveCamera()->Elevation(40.0 / numFrames);
    ren->GetActiveCamera()->Zoom(pow(2.0, 1.0 / numFrames));
    ren->GetActiveCamera()->Roll(20.0 / numFrames);
    win->Render();
  }

  timer->StopTimer();
  if (timeit)
  {
    double t = timer->GetElapsedTime();
    std::cout << "Avg Frame time: " << t / numFrames << " Frame Rate: " << numFrames / t << "\n";
  }
  int retVal = vtkRegressionTestImageThreshold(win.GetPointer(), 0.05);
  if (retVal == vtkRegressionTester::DO_INTERACTOR)
  {
    iren->Start();
  }

  return !retVal;
}
