#include "viewer/OsgView.h"

#include <osgGA/TrackballManipulator>
#include <osg/PositionAttitudeTransform>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/StateSetManipulator>
#include <osg/ShapeDrawable>
#include <osg/Group>
#include <osgManipulator/Dragger>
#include <osgManipulator/TranslateAxisDragger>
#include <osgViewer/GraphicsWindow>
#include <osgViewer/api/Win32/GraphicsWindowWin32>
#include <osgDB/ReadFile>
#include <osg/LightModel>

#include "config.h"
#include "common/SpdLogger.h"
#include "viewer/KeyMapQtOsg.h"
#include "viewer/OsgCameraManipulator.h"
#include "viewer/OsgViewUI.h"

OsgView::OsgView(QObject* parent) noexcept
    : QObject(parent) {
    LOG_INFO("actor, self={}", fmt::ptr(this));
}

OsgView::~OsgView() {
    LOG_INFO("dctor, self={}", fmt::ptr(this));
}

void OsgView::InitView(osgViewer::View* pView) {
    if (nullptr == pView) {
        return;
    }
   
    view_ = pView;
}

osgViewer::View* OsgView::GetView() const {
    return view_.get();
}

void OsgView::Initialize(OsgCameraManipulator* cameraManipulator) {
    if (initialized_) {
        return;
    }
   
    if (nullptr != cameraManipulator) {
        cameraManipulator->Initialize();

        SetCameraManipulator(cameraManipulator);
    }

    if (!viewUI_.valid()) {
        const osg::Viewport* viewport =  view_->getCamera()->getViewport();
        osg::Viewport::value_type width = viewport->width();
        osg::Viewport::value_type height = viewport->height();
        viewUI_ = new OsgViewUI(view_, width, height);
        osg::Group* root = view_->getSceneData()->asGroup();
        dyt_check(nullptr != root);
        root->addChild(viewUI_.get());
    }

    view_->addEventHandler(new osgViewer::StatsHandler);
    view_->addEventHandler(new osgGA::StateSetManipulator(view_->getCamera()->getOrCreateStateSet()));
    initialized_ = true;
}

void OsgView::Uninitialize(void) {
    if (!initialized_) {
        return;
    }

    initialized_ = false;
}

bool OsgView::SetCameraManipulator(OsgCameraManipulator* cameraManipulator) {
    assert(view_.valid());
    if (cameraManipulator_ == cameraManipulator) {
        return false;
    }

    osgGA::CameraManipulator* cameraMainp = cameraManipulator->GetManipulator();
    if (nullptr == cameraMainp) {
        return false;
    }
    cameraManipulator_ = cameraManipulator;
    view_->setCameraManipulator(cameraMainp);
    return true;
}