/* osgVisual test. distortionNG, experimental.
*
*  Permission is hereby granted, free of charge, to any person obtaining a copy
*  of this software and associated documentation files (the "Software"), to deal
*  in the Software without restriction, including without limitation the rights
*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*  copies of the Software, and to permit persons to whom the Software is
*  furnished to do so, subject to the following conditions:
*
*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
*  THE SOFTWARE.
*/

#include "extViewer.h"
#include "distortionNG.h"

#include <osg/ArgumentParser>
#include <osg/PolygonOffset>

#include <osgDB/ReadFile>

#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>

#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
int main(int argc, char** argv)
{
    osg::ArgumentParser arguments(&argc, argv);

    // construct the viewer.
    extViewer viewer(arguments);

	osg::Image* intMap = osgDB::readImageFile("intensitymap.png");
	if (!intMap)
	{
		osg::notify(osg::WARN) << "Couldn't find intensity map, quiting." << std::endl;
		return -1;
	} 

	viewer.setUpViewForManualDistortion(0, intMap);
	//viewer.setUpViewForPanoramicSphericalDisplay(1, 0, 0, intMap);
    
	// set up the camera manipulators.
    {
        osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;

        keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new osgGA::TrackballManipulator() );
        keyswitchManipulator->addMatrixManipulator( '2', "Flight", new osgGA::FlightManipulator() );
        keyswitchManipulator->addMatrixManipulator( '3', "Drive", new osgGA::DriveManipulator() );
        keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new osgGA::TerrainManipulator() );

        std::string pathfile;
        char keyForAnimationPath = '5';
        while (arguments.read("-p",pathfile))
        {
            osgGA::AnimationPathManipulator* apm = new osgGA::AnimationPathManipulator(pathfile);
            if (apm || !apm->valid()) 
            {
                unsigned int num = keyswitchManipulator->getNumMatrixManipulators();
                keyswitchManipulator->addMatrixManipulator( keyForAnimationPath, "Path", apm );
                keyswitchManipulator->selectMatrixManipulator(num);
                ++keyForAnimationPath;
            }
        }

        viewer.setCameraManipulator( keyswitchManipulator.get() );
    }


    // add the state manipulator
    viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );

    // add the stats handler
    viewer.addEventHandler(new osgViewer::StatsHandler);

    // add the record camera path handler
    viewer.addEventHandler(new osgViewer::RecordCameraPathHandler);

    // add the window size toggle handler
    viewer.addEventHandler(new osgViewer::WindowSizeHandler);

	// add the thread model handler
    viewer.addEventHandler(new osgViewer::ThreadingHandler);

    // add the help handler
    viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));

    // add the LOD Scale handler
    viewer.addEventHandler(new osgViewer::LODScaleHandler);

    // add the screen capture handler
    viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);

    // load the nodes from the commandline arguments.
    osg::Node* rootnode = osgDB::readNodeFiles(arguments);

    if (!rootnode)
    {
		rootnode = osgDB::readNodeFile("cow.osgt");
		if(!rootnode)
		{
			osg::notify(osg::WARN)<<"Warning: no valid data loaded, please specify a database on the command line."<<std::endl;
			return 1;
		}
    }
	viewer.setSceneData( rootnode );

	//osg::ref_ptr<osg::Geode> geode = new osg::Geode;
	//geode->addDrawable( extViewer::createMesh(16, 9) );
	//geode->getOrCreateStateSet()->setMode( GL_LIGHTING, osg::StateAttribute::OFF );
	//geode->getOrCreateStateSet()->setAttributeAndModes( new osg::PolygonOffset(1.0f, 1.0f) );

	//osg::ref_ptr<distortionHandler> selector = new distortionHandler( viewer.getCamera() );

	//osg::ref_ptr<osg::Group> root = new osg::Group;
	//root->addChild( geode.get() );
	//root->addChild( selector->createVertexHighlighter() );
	//viewer.addEventHandler( selector.get() );
	//viewer.setSceneData( root.get() );

	// Avoid that the highlighter is culled away
	//osg::CullSettings::CullingMode mode = viewer.getCamera()->getCullingMode();
	//viewer.getCamera()->setCullingMode( mode & (~osg::CullSettings::SMALL_FEATURE_CULLING) );
	
	// run the viewers main loop
	return viewer.run();
}

/*
ToDo: 
 * 
 * distortionHandler::handle startet Intersections. Da jedoch das distortion Mesh keine Geometry der Scene mehr ist, gibt es keine Intersection
 *  -> es muss die intersektion umgestellt werden, um das Distortion Mesh zu intersecten.
 * Es muss geprüft werdne, ob bei dne Mausverschiebungen die texturecoordinaten verschoben, oder das Distortion Mesh verschoben wird.





*/