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/* --*-c++-*-- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2010 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef OSGEARTHFEATURES_FEATURE_MODEL_GRAPH_H
#define OSGEARTHFEATURES_FEATURE_MODEL_GRAPH_H 1

#include <osgEarthFeatures/Common>
#include <osgEarthFeatures/FeatureModelSource>
#include <osgEarthFeatures/Session>
#include <osgEarthSymbology/Style>
#include <osgEarth/ThreadingUtils>
#include <osg/Node>
#include <set>

namespace osgEarth { namespace Features
{
    using namespace osgEarth;
    using namespace osgEarth::Symbology;

    class OSGEARTHFEATURES_EXPORT FeatureModelGraph : public osg::Group
    {
    public:
        FeatureModelGraph( 
            FeatureSource*                   source,
            const FeatureModelSourceOptions& options,
            FeatureNodeFactory*              factory,
            Session*                         session );

        osg::Node* load( unsigned lod, unsigned tileX, unsigned tileY, const std::string& uri );

        StyleSheet* getStyles() { return _session->styles(); }

        void setStyles( StyleSheet* styles );

        void dirty();


        virtual void traverse(osg::NodeVisitor& nv);

    protected:
        virtual ~FeatureModelGraph();

        void setupPaging();

        osg::Group* build( const FeatureLevel& level, const GeoExtent& extent, const TileKey* key);

        osg::Group* build( const Style& baseStyle, const Query& baseQuery, const GeoExtent& extent );

    private:
        
        osg::Group* createNodeForStyle(const Style& style, const Query& query);
       
        osg::BoundingSphered getBoundInWorldCoords( const GeoExtent& extent, const MapFrame* mapf ) const;

        void buildSubTilePagedLODs(
            unsigned lod, unsigned tileX, unsigned tileY,
            const MapFrame* mapFrame, osg::Group* parent);

        void redraw();

    private:
        FeatureModelSourceOptions        _options;
        osg::ref_ptr<FeatureSource>      _source;
        osg::ref_ptr<FeatureNodeFactory> _factory;
        osg::ref_ptr<Session>            _session;
        UID                              _uid;
        std::set<std::string>            _blacklist;
        Threading::ReadWriteMutex        _blacklistMutex;
        GeoExtent                        _usableFeatureExtent;
        bool                             _featureExtentClamped;
        GeoExtent                        _usableMapExtent;
        osg::BoundingSphered             _fullWorldBound;
        bool                             _useTiledSource;
        osgEarth::Revision               _revision;
        bool                             _dirty;
        std::vector<const FeatureLevel*> _lodmap;
    };

} } // namespace osgEarth::Features

#endif // OSGEARTHFEATURES_FEATURE_MODEL_GRAPH_H