/* -*-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_KML
#define OSGEARTH_DRIVER_KML 1

#include <osgEarth/MapNode>
#include <osgEarth/URI>
#include <osgEarth/Registry>
#include <osgDB/ReaderWriter>
#include <osgDB/FileNameUtils>
#include <osgDB/Registry>
#include "KMLOptions"

namespace osgEarth { namespace Drivers
{
    using namespace osgEarth;

    class KML // header-only (no export)
    {
    public:
        /**
         * Loads KML or KMZ from a URI.
         *
         * @param[in ] uri     URI from which to load the KML or KMZ
         * @param[in ] mapNode MapNode to which to attach KML elements
         * @param[in ] options Optional KML options
         */
        static osg::Node* load(const URI&            uri, 
                               MapNode*              mapNode,
                               const osgDB::Options* dbOptions, 
                               const KMLOptions&     kmlOptions)
        {
            // ensure the library is loaded.
            osgDB::Registry::instance()->addArchiveExtension( "kmz" );
            if ( osgDB::getLowerCaseFileExtension(uri.full()) == "kmz" )
            {
                OE_INFO << "[KML] Preloading KML plugin\n";
                std::string libName = osgDB::Registry::instance()->createLibraryNameForExtension("kml");
                osgDB::Registry::LoadStatus status = osgDB::Registry::instance()->loadLibrary(libName);
                if ( status == osgDB::Registry::NOT_LOADED )
                {
                    OE_WARN << "[KML] FAILED!\n";
                }
                URI newURI( uri.full() + "/doc.kml", uri.context() );
                return load( newURI, mapNode, dbOptions, kmlOptions );
            }

            if ( !mapNode ) {
                OE_WARN << "[KML] " << "MapNode instance required" << std::endl;
                return 0L;
            }
            osg::ref_ptr<osgDB::Options> options = Registry::instance()->cloneOrCreateOptions( dbOptions );
            options->setPluginData( "osgEarth::MapNode",    mapNode );
            options->setPluginData( "osgEarth::KMLOptions", (void*)&kmlOptions );

            return uri.getNode( options.get() );
        }

        static osg::Node* load(const URI&            uri, 
                               MapNode*              mapNode,
                               const KMLOptions&     kmlOptions =KMLOptions() )
        {
            return load(uri, mapNode, 0L, kmlOptions);
        }
    };

} } // namespace osgEarth::Drivers

#endif // OSGEARTH_DRIVER_KML
