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//
// Created by Stewart Boogert on 05/03/2023.
//

#include "G4VtkTextPipeline.hh"

#include "G4Text.hh"
#include "G4VisAttributes.hh"
#include "G4VtkViewer.hh"

#include <vtkBillboardTextActor3D.h>
#include <vtkTextProperty.h>

std::size_t G4VtkTextPipeline::MakeHash(const G4Text& text, const G4VtkVisContext& /*vc*/,
                                        const G4VisAttributes* pVA)
{
  std::size_t hash = std::hash<G4VisAttributes>{}(*pVA);

  G4double x = text.GetPosition().x();
  G4double y = text.GetPosition().y();
  G4double z = text.GetPosition().z();

  std::hash_combine(hash, std::hash<G4String>{}(text.GetText()));
  std::hash_combine(hash, std::hash<G4double>{}(x));
  std::hash_combine(hash, std::hash<G4double>{}(y));
  std::hash_combine(hash, std::hash<G4double>{}(z));

  return hash;
}

G4VtkTextPipeline::G4VtkTextPipeline(const G4Text& text, const G4VtkVisContext& vcIn,
                                     const G4VisAttributes* pVA)
  : G4VVtkPipeline(text.GetText().c_str(), "G4VtkTextPipeline", vcIn, false, vcIn.fViewer->renderer)
{
  G4double x = text.GetPosition().x();
  G4double y = text.GetPosition().y();
  G4double z = text.GetPosition().z();

  G4Color colour = pVA->GetColour();
  G4double opacity = colour.GetAlpha();

  actor = vtkSmartPointer<vtkBillboardTextActor3D>::New();
  actor->SetInput(text.GetText().c_str());
  actor->SetPosition(x, y, z);
  actor->GetTextProperty()->SetFontSize(text.GetScreenSize());
  actor->GetTextProperty()->SetColor(colour.GetRed(), colour.GetGreen(), colour.GetBlue());
  actor->GetTextProperty()->SetOpacity(opacity);

  vc.fViewer->renderer->AddActor(actor);
}

void G4VtkTextPipeline::Enable()
{
  actor->SetVisibility(1);
}

void G4VtkTextPipeline::Disable()
{
  actor->SetVisibility(0);
}

void G4VtkTextPipeline::Print()
{
  G4VVtkPipeline::Print();
}

void G4VtkTextPipeline::Modified()
{
  G4VVtkPipeline::Modified();
}

void G4VtkTextPipeline::Clear()
{
  renderer->RemoveActor(actor);
  G4VVtkPipeline::Clear();
}

void G4VtkTextPipeline::SetText(const G4String& text)
{
  actor->SetInput(text.c_str());
}