/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library 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 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGDB_OPTIONS
#define OSGDB_OPTIONS 1

#include <osgDB/AuthenticationMap>
#include <osgDB/ReaderWriter>

#include <deque>
#include <list>
#include <iosfwd>

namespace osgDB {

/** list of directories to search through which searching for files. */
typedef std::deque<std::string> FilePathList;

enum CaseSensitivity
{
    CASE_SENSITIVE,
    CASE_INSENSITIVE
};

// forward decare
class Options;

class OSGDB_EXPORT FindFileCallback : public virtual osg::Referenced
{
    public:

        virtual std::string findDataFile(const std::string& filename, const Options* options, CaseSensitivity caseSensitivity);

        virtual std::string findLibraryFile(const std::string& filename, const Options* options, CaseSensitivity caseSensitivity);

    protected:
        virtual ~FindFileCallback() {}
};


class OSGDB_EXPORT ReadFileCallback : public virtual osg::Referenced
{
    public:

        virtual ReaderWriter::ReadResult openArchive(const std::string& filename,ReaderWriter::ArchiveStatus status, unsigned int indexBlockSizeHint, const Options* useObjectCache);

        virtual ReaderWriter::ReadResult readObject(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readImage(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readHeightField(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readNode(const std::string& filename, const Options* options);

        virtual ReaderWriter::ReadResult readShader(const std::string& filename, const Options* options);

    protected:
        virtual ~ReadFileCallback() {}
};

class OSGDB_EXPORT WriteFileCallback : public virtual osg::Referenced
{
    public:

        virtual ReaderWriter::WriteResult writeObject(const osg::Object& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeImage(const osg::Image& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeHeightField(const osg::HeightField& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeNode(const osg::Node& obj, const std::string& fileName,const Options* options);

        virtual ReaderWriter::WriteResult writeShader(const osg::Shader& obj, const std::string& fileName,const Options* options);

    protected:
        virtual ~WriteFileCallback() {}
};

/** Options base class used for passing options into plugins to control their operation.*/
class Options : public osg::Object
{
    public:

        /// bit mask for setting up which object types get cached by readObject/Image/HeightField/Node(filename) calls
        enum CacheHintOptions
        {   /// do not cache objects of any type
            CACHE_NONE          = 0,

            /// cache nodes loaded via readNode(filename)
            CACHE_NODES         = 1<<0,

            /// cache images loaded via readImage(filename)
            CACHE_IMAGES        = 1<<1,

            /// cache heightfield loaded via readHeightField(filename)
            CACHE_HEIGHTFIELDS  = 1<<2,

            /// cache heightfield loaded via readHeightField(filename)
            CACHE_ARCHIVES      = 1<<3,

            /// cache objects loaded via readObject(filename)
            CACHE_OBJECTS       = 1<<4,

            /// cache shaders loaded via readShader(filename)
            CACHE_SHADERS       = 1<<5,

            /// cache on all read*(filename) calls
            CACHE_ALL           = CACHE_NODES |
                                    CACHE_IMAGES |
                                    CACHE_HEIGHTFIELDS |
                                    CACHE_ARCHIVES |
                                    CACHE_OBJECTS |
                                    CACHE_SHADERS
        };

        /// range of options of whether to build kdtrees automatically on loading
        enum BuildKdTreesHint
        {
            NO_PREFERENCE,
            DO_NOT_BUILD_KDTREES,
            BUILD_KDTREES
        };


        Options():
            osg::Object(true),
            _objectCacheHint(CACHE_ARCHIVES),
            _buildKdTreesHint(NO_PREFERENCE) {}

        Options(const std::string& str):
            osg::Object(true),
            _str(str),
            _objectCacheHint(CACHE_ARCHIVES),
            _buildKdTreesHint(NO_PREFERENCE) {}

        Options(const Options& options,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);

        META_Object(osgDB,Options);

        /** Set the general Options string.*/
        void setOptionString(const std::string& str) { _str = str; }

        /** Get the general Options string.*/
        const std::string& getOptionString() const { return _str; }

        /** Set the database path to use a hint of where to look when loading models.*/
        void setDatabasePath(const std::string& str) { _databasePaths.clear();  _databasePaths.push_back(str); }

        /** Get the database path which is used a hint of where to look when loading models.*/
        FilePathList& getDatabasePathList() { return _databasePaths; }

        /** Get the const database path which is used a hint of where to look when loading models.*/
        const FilePathList& getDatabasePathList() const { return _databasePaths; }


        /** Set whether the Registry::ObjectCache should be used by default.*/
        void setObjectCacheHint(CacheHintOptions useObjectCache) { _objectCacheHint = useObjectCache; }

        /** Get whether the Registry::ObjectCache should be used by default.*/
        CacheHintOptions getObjectCacheHint() const { return _objectCacheHint; }


        /** Set whether the KdTrees should be built for geometry in the loader model. */
        void setBuildKdTreesHint(BuildKdTreesHint hint) { _buildKdTreesHint = hint; }

        /** Get whether the KdTrees should be built for geometry in the loader model. */
        BuildKdTreesHint getBuildKdTreesHint() const { return _buildKdTreesHint; }


        /** Set the password map to be used by plugins when access files from secure locations.*/
        void setAuthenticationMap(AuthenticationMap* authenticationMap) { _authenticationMap = authenticationMap; }

        /** Get the password map to be used by plugins when access files from secure locations.*/
        const AuthenticationMap* getAuthenticationMap() const { return _authenticationMap.get(); }


        /** Sets a plugindata value PluginData with a string */
        void setPluginData(const std::string& s, void* v) const { _pluginData[s] = v; }

        /** Get a value from the PluginData */
        void* getPluginData(const std::string& s) { return _pluginData[s]; }

        /** Get a value from the PluginData */
        const void* getPluginData(const std::string& s) const
        {
            PluginDataMap::const_iterator itr = _pluginData.find(s);
            return (itr == _pluginData.end()) ? 0 : itr->second;
        }

        /** Remove a value from the PluginData */
        void removePluginData(const std::string& s) const { _pluginData.erase(s); }


        /** Sets a plugindata value PluginData with a string */
        void setPluginStringData(const std::string& s, const std::string& v) const { _pluginStringData[s] = v; }

        /** Get a string from the PluginStrData */
        std::string getPluginStringData(const std::string& s) { return _pluginStringData[s]; }

        /** Get a value from the PluginData */
        const std::string getPluginStringData(const std::string& s) const
        {
            PluginStringDataMap::const_iterator itr = _pluginStringData.find(s);
            return (itr == _pluginStringData.end()) ? std::string("") : itr->second;
        }

        /** Remove a value from the PluginData */
        void removePluginStringData(const std::string& s) const { _pluginStringData.erase(s); }



        /** Set the find callback to use in place of the default findFile calls.*/
        void setFindFileCallback( FindFileCallback* cb) { _findFileCallback = cb; }

        /** Get the const findFile callback.*/
        FindFileCallback* getFindFileCallback() const { return _findFileCallback.get(); }


        /** Set the read callback to use in place of the default readFile calls.*/
        void setReadFileCallback( ReadFileCallback* cb) { _readFileCallback = cb; }

        /** Get the const readFile callback.*/
        ReadFileCallback* getReadFileCallback() const { return _readFileCallback.get(); }


        /** Set the Registry callback to use in place of the default writeFile calls.*/
        void setWriteFileCallback( WriteFileCallback* cb) { _writeFileCallback = cb; }

        /** Get the const writeFile callback.*/
        WriteFileCallback* getWriteFileCallback() const { return _writeFileCallback.get(); }


    protected:

        virtual ~Options() {}

        std::string                     _str;
        FilePathList                    _databasePaths;
        CacheHintOptions                _objectCacheHint;
        BuildKdTreesHint                _buildKdTreesHint;
        osg::ref_ptr<AuthenticationMap> _authenticationMap;

        typedef std::map<std::string,void*> PluginDataMap;
        mutable PluginDataMap _pluginData;
        typedef std::map<std::string,std::string> PluginStringDataMap;
        mutable PluginStringDataMap _pluginStringData;

        osg::ref_ptr<FindFileCallback>      _findFileCallback;
        osg::ref_ptr<ReadFileCallback>      _readFileCallback;
        osg::ref_ptr<WriteFileCallback>     _writeFileCallback;
};

}

#endif // OSGDB_OPTIONS