/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
 * Copyright 2018 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 OSGEARTH_DRIVER_COLORRAMP_DRIVEROPTIONS
#define OSGEARTH_DRIVER_COLORRAMP_DRIVEROPTIONS 1

#include <osgEarth/Common>
#include <osgEarth/TileSource>
#include <osgEarth/URI>
#include <osgEarth/ElevationLayer>

namespace osgEarth { namespace Drivers
{
    using namespace osgEarth;

    class ColorRampOptions : public TileSourceOptions // NO EXPORT; header only
    {
    public:            
        optional<ElevationLayerOptions>& elevationLayer() { return _elevationLayerOptions; }
        const optional<ElevationLayerOptions>& elevationLayer() const { return _elevationLayerOptions; }

        optional<URI>& ramp() { return _ramp; }
        const optional<URI>& ramp() const { return _ramp; }

    public:
        ColorRampOptions( const TileSourceOptions& opt =TileSourceOptions() ) :
            TileSourceOptions( opt )      
        {
            setDriver( "colorramp" );
            fromConfig( _conf );
        }

        /** dtor */
        virtual ~ColorRampOptions() { }

    public:
        Config getConfig() const {
            Config conf = TileSourceOptions::getConfig();
            conf.set("elevation", _elevationLayerOptions );
            conf.set("ramp", _ramp);
            return conf;
        }

    protected:
        void mergeConfig( const Config& conf ) {
            TileSourceOptions::mergeConfig( conf );
            fromConfig( conf );
        }

    private:
        void fromConfig( const Config& conf ) {
            conf.get("elevation", _elevationLayerOptions );
            if (!_elevationLayerOptions.isSet())
            {
                // Try to get the settings from a heightfield specification instead
                conf.get("heightfield", _elevationLayerOptions );
            }
            conf.get("ramp", _ramp);
        }

      
        optional<URI> _ramp;
        optional<ElevationLayerOptions> _elevationLayerOptions;
    };

} } // namespace osgEarth::Drivers

#endif // OSGEARTH_DRIVER_COLORRAMP_DRIVEROPTIONS

