/**
 *  @file
 *  @author     2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
 *  @copyright  Simplified BSD
 *
 *  @cond
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the FreeBSD license as published by the FreeBSD
 *  project.
 *
 *  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.
 *
 *  You should have received a copy of the FreeBSD license along with this
 *  program. If not, see <http://www.opensource.org/licenses/bsd-license>.
 *  @endcond
 */

#include "CompositeDisplay.h"
#if 0
#ifdef MACOSX
USE_GRAPICSWINDOW_IMPLEMENTATION(Cocoa)
#else
USE_GRAPHICSWINDOW()
#endif
#endif

CompositeDisplay::CompositeDisplay(unsigned int x,
                                   unsigned int y,
                                   unsigned int width,
                                   unsigned int height,
                                   int screenId) {
	_waitForViewOp = false;
	unsigned int tWidth = 0;
	unsigned int tHeight = 0;
	getResolution(tWidth, tHeight, screenId);

	osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
	traits->doubleBuffer = true;
	traits->sharedContext = 0;
	traits->screenNum = screenId;

	if (width == 0 || height == 0 || (width == tWidth && height == tHeight)) {
		// fullscreen
		traits->windowDecoration = false;
		traits->width = tWidth;
		traits->height = tHeight;
		traits->x = 0;
		traits->y = 0;
	} else {
		// Start with given resolution
		traits->windowDecoration = true;
		traits->x = x;
		traits->y = y;
		traits->width = width;
		traits->height = height;
	}

	_gc = osg::GraphicsContext::createGraphicsContext(traits.get());
	if (_gc.valid()) {
		_gc->setClearColor(osg::Vec4f(1.0f,1.0f,1.0f,1.0f));
		_gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	}

	_width = traits->width;
	_height = traits->height;

	setRunMaxFrameRate(30);
//  setRunFrameScheme(osgViewer::ViewerBase::ON_DEMAND);
	setThreadingModel(osgViewer::Viewer::AutomaticSelection);
}

CompositeDisplay::~CompositeDisplay() {}

void CompositeDisplay::frame(double simulationTime) {
	tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);
	CompositeViewer::frame();
}

bool CompositeDisplay::checkNeedToDoFrame() {
	return CompositeViewer::checkNeedToDoFrame();
}

void CompositeDisplay::addView(const std::string& name, osg::Viewport* v, osgViewer::View* view) {
	tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);
	_viewports[name] = v;

	_views[name] = view;
	_views[name]->setName(name);
	_views[name]->getCamera()->setName(name);
	_views[name]->setCameraManipulator(new osgGA::TrackballManipulator);

	// add the state manipulator
	osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
	statesetManipulator->setStateSet(_views[name]->getCamera()->getOrCreateStateSet());
	_views[name]->addEventHandler( statesetManipulator.get() );

	_views[name]->addEventHandler( new osgViewer::StatsHandler );
	_views[name]->addEventHandler( new osgViewer::HelpHandler );
	_views[name]->addEventHandler( new osgViewer::WindowSizeHandler );
	_views[name]->addEventHandler( new osgViewer::ThreadingHandler );

	_views[name]->getCamera()->setViewport(v);

	// set graphic context
	_views[name]->getCamera()->setGraphicsContext(_gc.get());
	CompositeViewer::addView(_views[name]);

}

void CompositeDisplay::moveView(const std::string& name, osg::Viewport* v) {
	tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);
	const osg::GraphicsContext::Traits* traits = _gc->getTraits();
	osg::Viewport* absoluteVp = new osg::Viewport(v->x() * (traits->width/100.0),
	        v->y() * (traits->height/100.0),
	        v->width() * (traits->width/100.0),
	        v->height() * (traits->height/100.0));
	_views[name]->getCamera()->setViewport(absoluteVp);
}

void CompositeDisplay::removeView(const std::string& name) {
	tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);

	_views[name]->getCamera()->setGraphicsContext(NULL);
	_views[name]->getCamera()->setViewport(NULL);

	CompositeViewer::removeView(_views[name]);

	if (_views.find(name) != _views.end()) {
		_views.erase(name);
	}
	if (_viewports.find(name) != _viewports.end())
		_viewports.erase(name);
}

osg::GraphicsContext::WindowingSystemInterface* CompositeDisplay::wsi = NULL;
void CompositeDisplay::getResolution(unsigned int& width, unsigned int& height, int screenId) {
	if (!wsi)
		wsi = osg::GraphicsContext::getWindowingSystemInterface();
	if (wsi) {
		wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(screenId), width, height);
	} else {
		width = 800;
		height = 600;
	}
}