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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_FILTER_CONTEXT_H
#define OSGEARTHFEATURES_FILTER_CONTEXT_H 1

#include <osgEarthFeatures/Common>
#include <osgEarthFeatures/Feature>
#include <osgEarthFeatures/OptimizerHints>
#include <osgEarthFeatures/Session>
#include <osgEarthSymbology/ResourceCache>
#include <osgEarth/GeoData>
#include <osg/Matrix>
#include <list>

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

    class OSGEARTHFEATURES_EXPORT FilterContext
    {
    public:
        FilterContext(
            Session*              session       =0L,
            const FeatureProfile* profile       =0L,
            const GeoExtent&      workingExtent =GeoExtent::INVALID );

        FilterContext( const FilterContext& rhs );

        void setResourceCache( ResourceCache* value ) { _resourceCache = value; }

    public: // properties

        Session* getSession() { return _session.get(); }
        const Session* getSession() const { return _session.get(); }

        const FeatureProfile* profile() const { return _profile.get(); }
        osg::ref_ptr<const FeatureProfile>& profile() { return _profile; }

        optional<GeoExtent>& extent() { return _extent; }
        const optional<GeoExtent>& extent() const { return _extent; }

        bool isGeocentric() const { return _isGeocentric; }
        bool& isGeocentric() { return _isGeocentric; }

        bool hasReferenceFrame() const { return !_referenceFrame.isIdentity(); }

        osg::Vec3d toLocal( const osg::Vec3d& world ) const { return world * _referenceFrame; }

        void toLocal( Geometry* geom ) const;

        osg::Vec3d toWorld( const osg::Vec3d& local ) const { return local * _inverseReferenceFrame; }

        void toWorld( Geometry* geom ) const;

        osg::Vec3d toMap( const osg::Vec3d& local ) const;

        osg::Vec3d fromMap( const osg::Vec3d& map ) const;

        const osg::Matrixd& referenceFrame() const { return _referenceFrame; }

        const osg::Matrix& inverseReferenceFrame() const { return _inverseReferenceFrame; }

        void setReferenceFrame( const osg::Matrixd& in ) {
            _referenceFrame = in;
            _inverseReferenceFrame.invert( _referenceFrame ); // = osg::Matrixd::inverse( _referenceFrame );
        }      

        ResourceCache* resourceCache() { return _resourceCache.get(); }

        OptimizerHints& optimizerHints() { return _optimizerHints; }

        std::string toString() const;

    protected:
        osg::ref_ptr<Session>              _session;
        osg::ref_ptr<const FeatureProfile> _profile;
        bool                               _isGeocentric;
        optional<GeoExtent>                _extent;
        osg::Matrixd                       _referenceFrame;
        osg::Matrixd                       _inverseReferenceFrame;
        OptimizerHints                     _optimizerHints;
        osg::ref_ptr<ResourceCache>        _resourceCache;
    };

} } // namespace osgEarth::Features

#endif // OSGEARTHFEATURES_FILTER_CONTEXT_H