#include "app/Application.h"

#include "common/SpdLogger.h"
#include "common/RecourceHelper.h"
#include "common/CrashHandler.h"

#include "ui/MainFrame.h"
#include "ui/MainWindow.h"
#include "viewer/OsgWidget.h"

#include <QTimer>
#include <QApplication>
#include <QGridLayout>

#include <osgViewer/CompositeViewer>
#include <osgViewer/ViewerEventHandlers>

#include <osgGA/MultiTouchTrackballManipulator>

#include <osgDB/ReadFile>
#include <osgEarth/MapNode>
#include <osgEarthUtil/ExampleResources>
#include <osgGA/StateSetManipulator>
// #include <osgEarth/GLUtils>

#include "osgqt/GraphicsWindowQt.h"
#include "scene/ui/CompositeWidgetManager.h"
#include "scene/ui/QueryElevationWidget.h"

#ifndef LC
#define LC "DYT"
#endif

const unsigned int MASK_2D = 0xF0000000;
std::string path = "D:\\Project\\DYT\\Source\\bin\\Release\\data\\";

bool scrollWindow(osgWidget::Event& ev) {
    // The first thing we need to do is make sure we have a Frame object...
    osgWidget::Frame* frame = dynamic_cast<osgWidget::Frame*>(ev.getWindow());

    if(!frame) return false;

    // And now we need to make sure our Frame has a valid internal EmbeddedWindow widget.
    osgWidget::Window::EmbeddedWindow* ew =
        dynamic_cast<osgWidget::Window::EmbeddedWindow*>(frame->getEmbeddedWindow())
    ;

    if(!ew) return false;

    // Lets get the visible area so that we can use it to make sure our scrolling action
    // is necessary in the first place.
    const osgWidget::Quad& va = ew->getWindow()->getVisibleArea();

    // The user wants to scroll up; make sure that the visible area's Y origin isn't already
    // at 0.0f, 0.0f.
    if(ev.getWindowManager()->isMouseScrollingUp() && va[1] != 0.0f)
        ew->getWindow()->addVisibleArea(0, -20)
    ;

    else if(va[1] <= (ew->getWindow()->getHeight() - ew->getHeight()))
        ew->getWindow()->addVisibleArea(0, 20)
    ;

    // We need to manually call update to make sure the visible area scissoring is done
    // properly.
    frame->update();

    return true;
}

bool changeTheme(osgWidget::Event& ev) {
    std::string theme;

    if(ev.key == osgGA::GUIEventAdapter::KEY_Right)
        theme = "osgWidget/theme-1.png"
    ;

    else if(ev.key == osgGA::GUIEventAdapter::KEY_Left)
        theme = "osgWidget/theme-2.png"
    ;

    else return false;

    osgWidget::Frame* frame = dynamic_cast<osgWidget::Frame*>(ev.getWindow());

    if(!frame) return false;

    // This is just one way to access all our Widgets; we could just as well have used:
    //
    // for(osgWidget::Frame::Iterator i = frame.begin(); i != frame.end() i++) {}
    //
    // ...and it have worked, too.
    for(unsigned int row = 0; row < 3; row++) {
        for(unsigned int col = 0; col < 3; col++) {
            frame->getByRowCol(row, col)->setImage(theme);
        }
    }

    return true;
}


osg::Node* createUiExample(osgViewer::View* viewer, osgWidget::WindowManager* wm) {
	if(!wm) return nullptr;

	// viewer.setUpViewInWindow(
	// 	50,
	// 	50,
	// 	static_cast<int>(wm->getWidth()),
	// 	static_cast<int>(wm->getHeight())
	// );

	osg::Group*  group  = new osg::Group();
	osg::Camera* camera = wm->createParentOrthoCamera();

	group->addChild(camera);

	viewer->addEventHandler(new osgWidget::MouseHandler(wm));
	viewer->addEventHandler(new osgWidget::KeyboardHandler(wm));
	viewer->addEventHandler(new osgWidget::ResizeHandler(wm, camera));
	viewer->addEventHandler(new osgWidget::CameraSwitchHandler(wm, camera));
	viewer->addEventHandler(new osgViewer::StatsHandler());
	viewer->addEventHandler(new osgViewer::WindowSizeHandler());
	viewer->addEventHandler(new osgGA::StateSetManipulator(
		viewer->getCamera()->getOrCreateStateSet()
	));

	wm->resizeAllWindows();
	return group;	
}

void creatWidget(osgViewer::View* viewer, osg::Group* root) {
	osgWidget::WindowManager* wm = new osgWidget::WindowManager(
		viewer,
		1280.0f,
		1024.0f,
		MASK_2D,
		osgWidget::WindowManager::WM_PICK_DEBUG
		//osgWidget::WindowManager::WM_NO_INVERT_Y
	);

	osgWidget::Frame* frame = osgWidget::Frame::createSimpleFrameFromTheme(
		"frame",
		osgDB::readRefImageFile("osgWidget/theme.png"),
		40.0f,
		40.0f,
	osgWidget::Frame::FRAME_ALL
	);
	osgWidget::Box*    box  = new osgWidget::Box("images", osgWidget::Box::VERTICAL);
	osgWidget::Widget* img1 = new osgWidget::Widget("im1", 512.0f, 512.0f);
	osgWidget::Widget* img2 = new osgWidget::Widget("im2", 512.0f, 512.0f);
	osgWidget::Widget* img3 = new osgWidget::Widget("im3", 512.0f, 512.0f);
	osgWidget::Widget* img4 = new osgWidget::Widget("im4", 512.0f, 512.0f);

	img1->setImage(path + "osgWidget/scrolled1.jpg", true);
	img2->setImage(path + "osgWidget/scrolled2.jpg", true);
	img3->setImage(path + "osgWidget/scrolled3.jpg", true);
	img4->setImage(path + "osgWidget/scrolled4.jpg", true);

	img1->setMinimumSize(10.0f, 10.0f);
	img2->setMinimumSize(10.0f, 10.0f);
	img3->setMinimumSize(10.0f, 10.0f);
	img4->setMinimumSize(10.0f, 10.0f);

	box->addWidget(img1);
	box->addWidget(img2);
	box->addWidget(img3);
	box->addWidget(img4);
	box->setEventMask(osgWidget::EVENT_NONE);

	//frame->getEmbeddedWindow()->setWindow(box);
	frame->setWindow(box);
	frame->getEmbeddedWindow()->setColor(1.0f, 1.0f, 1.0f, 1.0f);
	frame->resize(300.0f, 300.0f);
	frame->addCallback(new osgWidget::Callback(&scrollWindow, osgWidget::EVENT_MOUSE_SCROLL));
	frame->addCallback(new osgWidget::Callback(&changeTheme, osgWidget::EVENT_KEY_DOWN));

	wm->addChild(frame);

	osg::Node* ui = createUiExample(viewer, wm);
	root->addChild(ui);
}

void configureView( osgViewer::View* view )
{
	// default uniform values:
	// GLUtils::setGlobalDefaults(view->getCamera()->getOrCreateStateSet());

	// add some stock OSG handlers:
	view->addEventHandler(new osgViewer::StatsHandler());
	view->addEventHandler(new osgViewer::WindowSizeHandler());
	view->addEventHandler(new osgViewer::ThreadingHandler());
	view->addEventHandler(new osgViewer::LODScaleHandler());
	view->addEventHandler(new osgGA::StateSetManipulator(view->getCamera()->getOrCreateStateSet()));
	view->addEventHandler(new osgViewer::RecordCameraPathHandler());
	view->addEventHandler(new osgViewer::ScreenCaptureHandler());
}


osg::Node* LoadEarth(const std::string& earth, osgViewer::CompositeViewer* viewer) {
	osg::ref_ptr<osg::Node> node = osgDB::readNodeFile(earth);

	osg::ref_ptr<osgEarth::MapNode> mapNode = osgEarth::MapNode::get(node.get());
	if ( !mapNode.valid() )
	{
		OE_WARN << LC << "Loaded scene graph does not contain a MapNode - aborting" << std::endl;
		return 0L;
	}

	// collect the views
	osgViewer::Viewer::Views views;
	if (viewer)
	{
		viewer->getViews(views);
	}

	// warn about not having an earth manip
	for (osgViewer::Viewer::Views::iterator view = views.begin(); view != views.end(); ++view)
	{
		osgEarth::Util::EarthManipulator* manip = dynamic_cast<osgEarth::Util::EarthManipulator*>((*view)->getCameraManipulator());
		if ( manip == 0L )
		{
			OE_WARN << LC << "Helper used before installing an EarthManipulator" << std::endl;
		}
	}

	// a root node to hold everything:
	osg::Group* root = new osg::Group();

	root->addChild( node );

	// parses common cmdline arguments and apply to the first view:
	// if ( !views.empty() )
	// {
	// 	parse( mapNode.get(), args, views.front(), root, userContainer );
 //        
	// 	float lodscale;
	// 	if (args.read("--lodscale", lodscale))
	// 	{
	// 		LODScaleGroup* g = new LODScaleGroup();
	// 		g->setLODScaleFactor(osg::maximum(lodscale, 0.0001f));
	// 		osgEarth::insertGroup(g, mapNode->getParent(0));
	// 		OE_NOTICE << "LOD Scale set to: " << lodscale << std::endl;
	// 	}
	// }

	// configures each view with some stock goodies
	for (osgViewer::Viewer::Views::iterator view = views.begin(); view != views.end(); ++view)
	{
		configureView( *view );
	}

#ifdef OSG_GL3_AVAILABLE
	if (viewer)
	{
		viewer->setRealizeOperation(new GL3RealizeOperation());
	}
#endif

	return root;
}

class ViewerWidget : public QWidget, public osgViewer::CompositeViewer
{
public:
    ViewerWidget(QWidget* parent = 0, Qt::WindowFlags f = 0, osgViewer::ViewerBase::ThreadingModel threadingModel=osgViewer::CompositeViewer::SingleThreaded) : QWidget(parent, f)
    {
        setThreadingModel(threadingModel);

        // disable the default setting of viewer.done() by pressing Escape.
        setKeyEventSetsDone(0);

    	std::string earthPath = "D:/Project/DYT/Tool/TritonSample/TritonSample/triton.earth";
    	// osg::Node* node = osgDB::readNodeFile();
    	osg::Node* node =LoadEarth(earthPath, this);
    	if ( !node ) {
    		return;
    	}
      
    	
    	// Group to hold all our annotation elements.
    	// osg::Group* annoGroup = new osg::Group();
     //    osgEarth::MapNode::get(node)->addChild( annoGroup );
    	
        QWidget* widget1 = addViewWidget( createGraphicsWindow(0,0,100,100), node);
        // QWidget* widget2 = addViewWidget( createGraphicsWindow(0,0,100,100), osgDB::readRefNodeFile("glider.osgt") );
        // QWidget* widget3 = addViewWidget( createGraphicsWindow(0,0,100,100), osgDB::readRefNodeFile("axes.osgt") );
        // QWidget* widget4 = addViewWidget( createGraphicsWindow(0,0,100,100), osgDB::readRefNodeFile("fountain.osgt") );
        // QWidget* popupWidget = addViewWidget( createGraphicsWindow(900,100,320,240,"Popup window",true), osgDB::readRefNodeFile("dumptruck.osgt") );
        // popupWidget->show();

    	

        QGridLayout* grid = new QGridLayout;
        grid->addWidget( widget1, 0, 0 );
        // grid->addWidget( widget2, 0, 1 );
        // grid->addWidget( widget3, 1, 0 );
        // grid->addWidget( widget4, 1, 1 );
        setLayout( grid );

        connect( &_timer, SIGNAL(timeout()), this, SLOT(update()) );
        _timer.start( 10 );
    }

    QWidget* addViewWidget( osgQt::GraphicsWindowQt* gw, osg::ref_ptr<osg::Node> scene )
    {
        osgViewer::View* view = new osgViewer::View;
        addView( view );
    	view->setCameraManipulator( new osgEarth::Util::EarthManipulator() );
    	configureView(view);

        osg::Camera* camera = view->getCamera();
        camera->setGraphicsContext( gw );

        const osg::GraphicsContext::Traits* traits = gw->getTraits();

        camera->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
        camera->setViewport( new osg::Viewport(0, 0, traits->width, traits->height) );
        camera->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(traits->width)/static_cast<double>(traits->height), 1.0f, 10000.0f );

    	creatWidget(view, scene->asGroup());

    	osgEarth::MapNode* mapNode = osgEarth::MapNode::findMapNode(scene);
    	if ( !mapNode )
    		return gw->getGLWidget();

    	auto skyDome_ = osgEarth::Util::SkyNode::create(mapNode);
    	if (!mapNode) {
    		LOG_WARN("eart map node is nullptr");
    		return gw->getGLWidget();
    	}
    	skyDome_->attach(view);
    	skyDome_->getSunLight()->setAmbient(osg::Vec4(0.5,0.5,0.5,1.0));
    	scene->asGroup()->addChild(skyDome_);

    	skyDome_->setDateTime(osgEarth::DateTime(2024, 12, 24, 3));

        view->setSceneData( scene );
        view->addEventHandler( new osgViewer::StatsHandler );
        // view->setCameraManipulator( new osgGA::MultiTouchTrackballManipulator );
        gw->setTouchEventsEnabled( true );
        return gw->getGLWidget();
    }

    osgQt::GraphicsWindowQt* createGraphicsWindow( int x, int y, int w, int h, const std::string& name="", bool windowDecoration=false )
    {
        osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
        osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
        traits->windowName = name;
        traits->windowDecoration = windowDecoration;
        traits->x = x;
        traits->y = y;
        traits->width = w;
        traits->height = h;
        traits->doubleBuffer = true;
        traits->alpha = ds->getMinimumNumAlphaBits();
        traits->stencil = ds->getMinimumNumStencilBits();
        traits->sampleBuffers = ds->getMultiSamples();
        traits->samples = ds->getNumMultiSamples();

        return new osgQt::GraphicsWindowQt(traits.get());
    }

    virtual void paintEvent( QPaintEvent* /*event*/ )
    { frame(); }

protected:

    QTimer _timer;
};

int main(int argc, char* argv[]) {
	SpdLogger logger("logs/log.txt", 5);
 //
	Application::setAttribute(Qt::AA_EnableHighDpiScaling);
 ////
    Application app(argc, argv);
	app.setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
	// InstallCrashHandler();
 //
	RecourceHelper::ChangeSkin("default");
	
	MainFrame mainWindow;
	mainWindow.showMaximized();
	//
	 int ret = app.exec();
	 app.Uninit();
     return ret;
	
	//osg::ArgumentParser arguments(&argc, argv);

	//QMainWindow* mainWindow = new QMainWindow;
	//OsgWidget* viewWidget = new OsgWidget(nullptr, Qt::Widget);
	//mainWindow->setCentralWidget(viewWidget);
	//// ViewerWidget* viewWidget = new ViewerWidget(nullptr, Qt::Widget, threadingModel);
	////viewWidget->setGeometry( 100, 100, 800, 600 );
	//viewWidget->Initialize();
	//mainWindow->show();
	//return app.exec();
}