/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
 * Copyright 2020 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_BING_H
#define OSGEARTH_BING_H

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

/**
 * Bing maps requires a license
 * https://msdn.microsoft.com/en-us/library/ff428643.aspx
 */
namespace osgEarth
{
    /**
     * Image layer connected to a Microsoft Bing Maps API endpoint
     */
    class OSGEARTH_EXPORT BingImageLayer : public ImageLayer
    {
    public: // serialization
        class OSGEARTH_EXPORT Options : public ImageLayer::Options
        {
        public:
            META_LayerOptions(osgEarth, Options, ImageLayer::Options);
            OE_OPTION(std::string, apiKey);
            OE_OPTION(std::string, imagerySet);
            OE_OPTION(URI, imageryMetadataURL);
            virtual Config getConfig() const;
        private:
            void fromConfig(const Config& conf);
        };

    public:
        META_Layer(osgEarth, BingImageLayer, Options, ImageLayer, BingImage);

    public:
        //! User's API key
        void setAPIKey(const std::string& value);
        const std::string& getAPIKey() const;

        //! Bing imagery set to access (default is Aerial)
        void setImagerySet(const std::string& value);
        const std::string& getImagerySet() const;

        //! Metadata API endpoint
        void setImageryMetadataURL(const URI& value);
        const URI& getImageryMetadataURL() const;

    public: // Layer
        
        //! Establishes a connection to the service
        virtual Status openImplementation();

        //! Closes all resources
        virtual Status closeImplementation();

        //! Creates a raster image for the given tile key
        virtual GeoImage createImageImplementation(const TileKey& key, ProgressCallback* progress) const;

    protected: // Layer

        //! Called by constructors
        virtual void init();

    protected:

        //! Destructor
        virtual ~BingImageLayer();

    private:
        typedef LRUCache<std::string, std::string> TileURICache;
        bool _debugDirect;
        TileURICache* _tileURICache;
        mutable std::atomic_int _apiCount;
        std::string _key;

        std::string getQuadKey(const TileKey&) const;
        std::string getDirectURI(const TileKey&) const;
    };


    /**
     * Elevation layer connected to a Microsoft Bing Maps API endpoint
     */
    class OSGEARTH_EXPORT BingElevationLayer : public ElevationLayer
    {
    public: // serialization
        class OSGEARTH_EXPORT Options : public ElevationLayer::Options
        {
        public:
            META_LayerOptions(osgEarth, Options, ElevationLayer::Options);
            OE_OPTION(std::string, apiKey);
            OE_OPTION(URI, url);
            virtual Config getConfig() const;
        private:
            void fromConfig(const Config& conf);
        };

    public:
        META_Layer(osgEarth, BingElevationLayer, Options, ElevationLayer, BingElevation);

    public:
        //! User's API key
        void setAPIKey(const std::string& value);
        const std::string& getAPIKey() const;

        //! API endpoint
        void setURL(const URI& value);
        const URI& getURL() const;

    public: // Layer

        //! Establishes a connection to the service
        virtual Status openImplementation();

        //! Creates a raster image for the given tile key
        virtual GeoHeightField createHeightFieldImplementation(const TileKey& key, ProgressCallback* progress) const;

    protected: // Layer

        //! Called by constructors
        virtual void init();

    protected:

        //! Destructor
        virtual ~BingElevationLayer();

    private:
        osg::ref_ptr<const Profile> _globalGeodetic;
        std::string _key;
    };

} // namespace osgEarth

OSGEARTH_SPECIALIZE_CONFIG(osgEarth::BingImageLayer::Options);
OSGEARTH_SPECIALIZE_CONFIG(osgEarth::BingElevationLayer::Options);

#endif // OSGEARTH_TMS_H