//C++ header - Open Scene Graph - Copyright (C) 1998-2002 Robert Osfield
//Distributed under the terms of the GNU Library General Public License (LGPL)
//as published by the Free Software Foundation.

#ifndef OSGDB_OUTPUT
#define OSGDB_OUTPUT 1

#include <osg/Object>

#include <osgDB/Export>

#include <string>
#include <map>

#include <fstream>

namespace osgDB {

/** ofstream wrapper class for adding support for indenting.
    Used in output of .osg ASCII files to improve their readability.*/
class OSGDB_EXPORT Output : public std::ofstream
{
    public:

        Output();
        Output(const char* name);
        
        virtual ~Output();

        void open(const char *name);
        
        // comment out temporarily to avoid compilation problems, RO Jan 2002.
        // void open(const char *name,int mode);

        Output& indent();

        inline const int getIndentStep() const { return _indentStep; }
        inline void setIndentStep(int step) { _indentStep = step; }

        inline const int getIndent() const { return _indent; }
        inline void setIndent(int indent)  { _indent = indent; }

        inline const int getNumIndicesPerLine() const { return _numIndicesPerLine; }
        inline void setNumIndicesPerLine(int num) { _numIndicesPerLine = num; }

        void moveIn();
        void moveOut();
        
        virtual bool writeObject(const osg::Object& obj);

        bool getUniqueIDForObject(const osg::Object* obj,std::string& uniqueID);
        bool createUniqueIDForObject(const osg::Object* obj,std::string& uniqueID);
        bool registerUniqueIDForObject(const osg::Object* obj,std::string& uniqueID);

        enum PathNameHint
        {
            AS_IS,
            FULL_PATH,
            RELATIVE_PATH,
            FILENAME_ONLY
        };
        
        inline void setPathNameHint(const PathNameHint pnh) { _pathNameHint = pnh; }
        inline const PathNameHint getPathNameHint() const { return _pathNameHint; }

        virtual const std::string getFileNameForOutput(const std::string& filename) const;

    protected:

        // prevent copy construction and assignment.
        Output(const Output&);
        Output& operator = (const Output&);

        virtual void init();

        int _indent;
        int _indentStep;
        
        int _numIndicesPerLine;

        typedef std::map<const osg::Object*,std::string> UniqueIDToLabelMapping;
        UniqueIDToLabelMapping _objectToUniqueIDMap;
        
        std::string _filename;
        
        PathNameHint _pathNameHint;

};

template<class T>
bool writeArrayBlock(Output& fw,T* start,T* finish)
{
    fw.indent() << "{" << std::endl;
    fw.moveIn();
    int numIndicesThisLine = 0;
    for(T* itr=start;itr!=finish;++itr)
    {
        if (numIndicesThisLine>=fw.getNumIndicesPerLine()) 
        {
            fw << std::endl;
            numIndicesThisLine = 0;
        }

        if (numIndicesThisLine==0) fw.indent();
        else fw << " ";

        fw << *itr;

        ++numIndicesThisLine;

    }
    fw << std::endl;
    fw.moveOut();
    fw.indent() << "}" << std::endl;
    return true;
}

}

#endif                                            // __SG_OUTPUT_H