/**
 * Stone of Orthanc
 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
 * Department, University Hospital of Liege, Belgium
 * Copyright (C) 2017-2019 Osimis S.A., Belgium
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 **/

#define GLEW_STATIC 1
// From Stone
#include "../../Framework/OpenGL/OpenGLIncludes.h"
#include "../../Applications/Sdl/SdlOpenGLWindow.h"
#include "../../Framework/Scene2D/CairoCompositor.h"
#include "../../Framework/Scene2D/ColorTextureSceneLayer.h"
#include "../../Framework/Scene2D/OpenGLCompositor.h"
#include "../../Framework/Scene2D/PanSceneTracker.h"
#include "../../Framework/Scene2D/RotateSceneTracker.h"
#include "../../Framework/Scene2D/Scene2D.h"
#include "../../Framework/Scene2D/ZoomSceneTracker.h"
#include "../../Framework/Scene2DViewport/ViewportController.h"
#include "../../Framework/Scene2DViewport/UndoStack.h"

#include "../../Framework/StoneInitialization.h"
#include "../../Framework/Messages/MessageBroker.h"

// From Orthanc framework
#include <Core/Logging.h>
#include <Core/OrthancException.h>
#include <Core/Images/Image.h>
#include <Core/Images/ImageProcessing.h>
#include <Core/Images/PngWriter.h>

#include <boost/make_shared.hpp>
#include <boost/ref.hpp>
#include "EmbeddedResources.h"

//#include <SDL.h>
#include <stdio.h>
#include <QDebug>
#include <QWindow>

static const unsigned int FONT_SIZE = 32;
static const int LAYER_POSITION = 150;

using namespace OrthancStone;

void PrepareScene(boost::shared_ptr<OrthancStone::ViewportController> controller)
{
  Scene2D& scene(*controller->GetScene());
  // Texture of 2x2 size
  {
    Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
    
    uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
    p[0] = 255;
    p[1] = 0;
    p[2] = 0;

    p[3] = 0;
    p[4] = 255;
    p[5] = 0;

    p = reinterpret_cast<uint8_t*>(i.GetRow(1));
    p[0] = 0;
    p[1] = 0;
    p[2] = 255;

    p[3] = 255;
    p[4] = 0;
    p[5] = 0;

    scene.SetLayer(12, new ColorTextureSceneLayer(i));

    std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
    l->SetOrigin(-3, 2);
    l->SetPixelSpacing(1.5, 1);
    l->SetAngle(20.0 / 180.0 * 3.14);
    scene.SetLayer(14, l.release());
  }

  // Texture of 1x1 size
  {
    Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
    
    uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
    p[0] = 255;
    p[1] = 0;
    p[2] = 0;

    std::auto_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
    l->SetOrigin(-2, 1);
    l->SetAngle(20.0 / 180.0 * 3.14);
    scene.SetLayer(13, l.release());
  }

  // Some lines
  {
    std::auto_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);

    layer->SetThickness(1);

    PolylineSceneLayer::Chain chain;
    chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
    chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
    chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
    chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
    layer->AddChain(chain, true, 255, 0, 0);

    chain.clear();
    chain.push_back(ScenePoint2D(-5, -5));
    chain.push_back(ScenePoint2D(5, -5));
    chain.push_back(ScenePoint2D(5, 5));
    chain.push_back(ScenePoint2D(-5, 5));
    layer->AddChain(chain, true, 0, 255, 0);

    double dy = 1.01;
    chain.clear();
    chain.push_back(ScenePoint2D(-4, -4));
    chain.push_back(ScenePoint2D(4, -4 + dy));
    chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
    chain.push_back(ScenePoint2D(4, 2));
    layer->AddChain(chain, false, 0, 0, 255);

//    layer->SetColor(0,255, 255);
    scene.SetLayer(50, layer.release());
  }

  // Some text
  {
    std::auto_ptr<TextSceneLayer> layer(new TextSceneLayer);
    layer->SetText("Hello");
    scene.SetLayer(100, layer.release());
  }
}


//void TakeScreenshot(const std::string& target,
//                    const Scene2D& scene,
//                    unsigned int canvasWidth,
//                    unsigned int canvasHeight)
//{
//  // Take a screenshot, then save it as PNG file
//  CairoCompositor compositor(scene, canvasWidth, canvasHeight);
//  compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT, FONT_SIZE, Orthanc::Encoding_Latin1);
//  compositor.Refresh();

//  Orthanc::ImageAccessor canvas;
//  compositor.GetCanvas().GetReadOnlyAccessor(canvas);

//  Orthanc::Image png(Orthanc::PixelFormat_RGB24, canvas.GetWidth(), canvas.GetHeight(), false);
//  Orthanc::ImageProcessing::Convert(png, canvas);

//  Orthanc::PngWriter writer;
//  writer.WriteToFile(target, png);
//}


//void HandleApplicationEvent(ViewportControllerPtr controller,
//                            const OpenGLCompositor& compositor,
//                            const SDL_Event& event,
//                            FlexiblePointerTrackerPtr& activeTracker)
//{
//  Scene2D& scene(*controller->GetScene());
//  if (event.type == SDL_MOUSEMOTION)
//  {
//    int scancodeCount = 0;
//    const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);

//    if (activeTracker.get() == NULL &&
//        SDL_SCANCODE_LCTRL < scancodeCount &&
//        keyboardState[SDL_SCANCODE_LCTRL])
//    {
//      // The "left-ctrl" key is down, while no tracker is present

//      PointerEvent e;
//      e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));

//      ScenePoint2D p = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());

//      char buf[64];
//      sprintf(buf, "(%0.02f,%0.02f)", p.GetX(), p.GetY());

//      if (scene.HasLayer(LAYER_POSITION))
//      {
//        TextSceneLayer& layer =
//          dynamic_cast<TextSceneLayer&>(scene.GetLayer(LAYER_POSITION));
//        layer.SetText(buf);
//        layer.SetPosition(p.GetX(), p.GetY());
//      }
//      else
//      {
//        std::auto_ptr<TextSceneLayer>
//          layer(new TextSceneLayer);
//        layer->SetColor(0, 255, 0);
//        layer->SetText(buf);
//        layer->SetBorder(20);
//        layer->SetAnchor(BitmapAnchor_BottomCenter);
//        layer->SetPosition(p.GetX(), p.GetY());
//        scene.SetLayer(LAYER_POSITION, layer.release());
//      }
//    }
//    else
//    {
//      scene.DeleteLayer(LAYER_POSITION);
//    }
//  }
//  else if (event.type == SDL_MOUSEBUTTONDOWN)
//  {
//    PointerEvent e;
//    e.AddPosition(compositor.GetPixelCenterCoordinates(event.button.x, event.button.y));

//    switch (event.button.button)
//    {
//      case SDL_BUTTON_MIDDLE:
//        activeTracker = boost::make_shared<PanSceneTracker>(controller, e);
//        break;

//      case SDL_BUTTON_RIGHT:
//        activeTracker = boost::make_shared<ZoomSceneTracker>(controller,
//          e, compositor.GetCanvasHeight());
//        break;

//      case SDL_BUTTON_LEFT:
//        activeTracker = boost::make_shared<RotateSceneTracker>(controller, e);
//        break;

//      default:
//        break;
//    }
//  }
//  else if (event.type == SDL_KEYDOWN &&
//           event.key.repeat == 0 /* Ignore key bounce */)
//  {
//    switch (event.key.keysym.sym)
//    {
//      case SDLK_s:
//        controller->FitContent(compositor.GetCanvasWidth(),
//                         compositor.GetCanvasHeight());
//        break;

//      case SDLK_c:
//        TakeScreenshot("screenshot.png", scene,
//                       compositor.GetCanvasWidth(),
//                       compositor.GetCanvasHeight());
//        break;

//      default:
//        break;
//    }
//  }
//}


static void GLAPIENTRY OpenGLMessageCallback(GLenum source,
                                             GLenum type,
                                             GLuint id,
                                             GLenum severity,
                                             GLsizei length,
                                             const GLchar* message,
                                             const void* userParam )
{
  if (severity != GL_DEBUG_SEVERITY_NOTIFICATION)
  {
    fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
            ( type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "" ),
            type, severity, message );
  }
}


//void Run(ViewportControllerPtr controller)
//{
//  SdlOpenGLWindow window("Hello", 1024, 768);

//  controller->FitContent(window.GetCanvasWidth(), window.GetCanvasHeight());

//  glEnable(GL_DEBUG_OUTPUT);
//  glDebugMessageCallback(OpenGLMessageCallback, 0);

//  OpenGLCompositor compositor(window, *controller->GetScene());
//  compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
//                     FONT_SIZE, Orthanc::Encoding_Latin1);

//  FlexiblePointerTrackerPtr tracker;

//  bool stop = false;
//  while (!stop)
//  {
//    compositor.Refresh();

//    SDL_Event event;
//    while (!stop &&
//           SDL_PollEvent(&event))
//    {
//      if (event.type == SDL_QUIT)
//      {
//        stop = true;
//        break;
//      }
//      else if (event.type == SDL_MOUSEMOTION)
//      {
//        if (tracker)
//        {
//          PointerEvent e;
//          e.AddPosition(compositor.GetPixelCenterCoordinates(
//            event.button.x, event.button.y));
//          tracker->PointerMove(e);
//        }
//      }
//      else if (event.type == SDL_MOUSEBUTTONUP)
//      {
//        if (tracker)
//        {
//          PointerEvent e;
//          e.AddPosition(compositor.GetPixelCenterCoordinates(
//            event.button.x, event.button.y));
//          tracker->PointerUp(e);
//          if(!tracker->IsAlive())
//            tracker.reset();
//        }
//      }
//      else if (event.type == SDL_WINDOWEVENT &&
//               event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED)
//      {
//        tracker.reset();
//        compositor.UpdateSize();
//      }
//      else if (event.type == SDL_KEYDOWN &&
//               event.key.repeat == 0 /* Ignore key bounce */)
//      {
//        switch (event.key.keysym.sym)
//        {
//          case SDLK_f:
//            window.GetWindow().ToggleMaximize();
//            break;

//          case SDLK_q:
//            stop = true;
//            break;

//          default:
//            break;
//        }
//      }

//      HandleApplicationEvent(controller, compositor, event, tracker);
//    }

//    SDL_Delay(1);
//  }
//}

extern void InitGL();

#include <QApplication>
#include "BasicSceneWindow.h"
int main(int argc, char* argv[])
{
  {
    QApplication a(argc, argv);

    QSurfaceFormat requestedFormat;
    requestedFormat.setVersion( 2, 0 );

    OrthancStone::Samples::BasicSceneWindow window;
    window.show();

    MessageBroker broker;
    boost::shared_ptr<UndoStack> undoStack(new UndoStack);
    boost::shared_ptr<ViewportController> controller = boost::make_shared<ViewportController>(
      undoStack, boost::ref(broker));
    PrepareScene(controller);

    QOpenGLContext * context = new QOpenGLContext;
    context->setFormat( requestedFormat );
    context->create();
    context->makeCurrent(window.GetOpenGlWidget().context()->surface());


    boost::shared_ptr<OpenGLCompositor> compositor = boost::make_shared<OpenGLCompositor>(window.GetOpenGlWidget(), *controller->GetScene());
    compositor->SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
                       FONT_SIZE, Orthanc::Encoding_Latin1);

    window.GetOpenGlWidget().SetCompositor(compositor);

    return a.exec();
  }












//  StoneInitialize();
//  Orthanc::Logging::EnableInfoLevel(true);

//  QApplication app(argc, argv);

//  OrthancStone::Samples::BasicSceneWindow window;

//  QSurfaceFormat requestedFormat;
//  requestedFormat.setVersion( 3, 3 );

//  window.show();

//  QOpenGLContext * context = new QOpenGLContext;
//  context->setFormat( requestedFormat );
//  context->create();

//  GLenum err = glewInit();
//  if( GLEW_OK != err ){
//    qDebug() << "[Error] GLEW failed to initialize. " << (const char*)glewGetErrorString(err);
//  }

//  try
//  {
//    MessageBroker broker;
//    ViewportControllerPtr controller = boost::make_shared<ViewportController>(
//          boost::ref(broker));
//    PrepareScene(controller);

//    boost::shared_ptr<OpenGLCompositor> compositor(new OpenGLCompositor(window.GetOpenGlWidget(), *controller->GetScene()));

//    compositor->SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
//                       FONT_SIZE, Orthanc::Encoding_Latin1);

//    window.SetCompositor(compositor);

//    app.exec();
//  }
//  catch (Orthanc::OrthancException& e)
//  {
//    LOG(ERROR) << "EXCEPTION: " << e.What();
//  }



//  StoneFinalize();

//  return 0;
}