// %flair:license{
// This file is part of the Flair framework distributed under the
// CECILL-C License, Version 1.0.
// %flair:license}
//  created:    2016/09/01
//  filename:   VisualizationCamera.cpp
//
//  author:     Guillaume Sanahuja
//              Copyright Heudiasyc UMR UTC/CNRS 7253
//
//  version:    $Id: $
//
//  purpose:    class for a visualization camera in the gui
//
/*********************************************************************/
#ifdef GL

#include "VisualizationCamera.h"
#include "Simulator.h"
#include "Model.h"
#include "Model_impl.h"
#include "Gui.h"
#include "Gui_impl.h"
#include <ICursorControl.h>
#include <ICameraSceneNode.h>
#include <IrrlichtDevice.h>
#include <ISceneManager.h>

using namespace irr;
using namespace gui;
using namespace core;
using namespace scene;
using namespace video;

namespace flair {
namespace simulator {

VisualizationCamera::VisualizationCamera(std::string inName) {
  name=inName;
  currentZoom = 0;
  LMouseKey = false;

  // camera for visualization
  camera = getGui()->getSceneManager()->addCameraSceneNode();
  camera->setAspectRatio(getGui()->getAspectRatio()); // on force a cause du view port
  camera->setUpVector(vector3df(0, 0, 1));
  camera->addAnimator(this);
  camera->setFarValue(8000);

  getGui()->pimpl_->AddVisualizationCamera(this);
  
  // camera to draw axis, in a new dedicated scene manager
  axis_scenemanager=getGui()->getSceneManager()->createNewSceneManager();
  axis_camera = axis_scenemanager->addCameraSceneNode();
  axis_camera->setAspectRatio(1);  // same as texture ratio, TODO: get it from texture in renderAxisToTexture
  axis_camera->setUpVector(vector3df(0, 0, 1));
  axis_camera->setFOV(PI / 2.5f);
  axis_scenemanager->setActiveCamera(axis_camera);
  prendre en compte le yaw monde/optitrack (rotation de axis_scenemanager?)
  IAnimatedMesh* arrowMeshRed = axis_scenemanager->addArrowMesh( "x_axisArrow",video::SColor(255, 255, 0, 0),video::SColor(255, 255, 0, 0));
  nodeX = axis_scenemanager->addMeshSceneNode(arrowMeshRed);
  nodeX->setMaterialFlag(video::EMF_LIGHTING, false);
  nodeX->setRotation(vector3df(0,0,-90));
  nodeX->setScale(vector3df(1,3,1));
  
  IAnimatedMesh* arrowMeshGreen = axis_scenemanager->addArrowMesh( "y_axisArrow",video::SColor(255, 0, 255, 0),video::SColor(255, 0, 255, 0));
  nodeY = axis_scenemanager->addMeshSceneNode(arrowMeshGreen);
  nodeY->setMaterialFlag(video::EMF_LIGHTING, false);
  nodeY->setScale(vector3df(1,3,1));
  
  IAnimatedMesh* arrowMeshBlue = axis_scenemanager->addArrowMesh( "z_axisArrow",video::SColor(255, 0, 0, 255),video::SColor(255, 0, 0, 255));
  nodeZ = axis_scenemanager->addMeshSceneNode(arrowMeshBlue);
  nodeZ->setMaterialFlag(video::EMF_LIGHTING, false);
  nodeZ->setRotation(vector3df(-90,0,0));//irrlicht is left handed, draw a right handed axis
  nodeZ->setScale(vector3df(1,3,1));
}

VisualizationCamera::~VisualizationCamera() {}

void VisualizationCamera::renderAxisToTexture(ITexture* texture) {
  //put axis at a "normalized" distance
  vector3df direction=camera->getTarget()-camera->getPosition();
  direction.normalize();
  nodeX->setPosition(camera->getPosition()+direction*6);
  nodeY->setPosition(camera->getPosition()+direction*6);
  nodeZ->setPosition(camera->getPosition()+direction*6);

  axis_camera->setPosition(camera->getPosition());
  axis_camera->setRotation(camera->getRotation());
  axis_camera->setTarget(camera->getTarget());
  
  axis_scenemanager->getVideoDriver()->setRenderTarget(texture, true, true, SColor(0,0,0,0));
  axis_scenemanager->drawAll();
  axis_scenemanager->getVideoDriver()->setRenderTarget(0, true, true, 0);
}

std::string VisualizationCamera::getName(void) {
  return name;
}

ICameraSceneNode *VisualizationCamera::getCameraSceneNode(void) {
  return camera;
}

ISceneNodeAnimator *VisualizationCamera::createClone(ISceneNode *node,
                                               ISceneManager *newManager) {
  return NULL;
}

bool VisualizationCamera::OnEvent(const irr::SEvent& event) {
  if (event.EventType != EET_MOUSE_INPUT_EVENT)
    return false;

  switch (event.MouseInput.Event) {

  case EMIE_MOUSE_WHEEL:
    currentZoom -= event.MouseInput.Wheel;
    break;
  case EMIE_LMOUSE_PRESSED_DOWN:
    LMouseKey = true;
    break;
  case EMIE_LMOUSE_LEFT_UP:
    LMouseKey = false;
    break;
  case EMIE_MOUSE_MOVED:
    MousePos = getGui()->getDevice()->getCursorControl()->getRelativePosition();
    break;
  default:
    return false;
    break;
  }

  return true;
}

} // end namespace simulator
} // end namespace flair

#endif // GL