/*
 * (C) Copyright 1996-2016 ECMWF.
 * 
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
 * In applying this licence, ECMWF does not waive the privileges and immunities 
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */

/*! \file GribAddressMode.h
    \brief Definition of the Template class GribAddressMode.
    
    Magics Team - ECMWF 2006
    
    Started: Mon 13-Feb-2006
    
    Changes:
    
*/

#ifndef GribAddressMode_H
#define GribAddressMode_H

#include "magics.h"
#include "MagTranslator.h"
#include "Factory.h"

#include "grib_api.h"


namespace magics {

class XmlNode;

class GribAddressMode {

public:
	GribAddressMode() {}
	virtual ~GribAddressMode() {}
    
    virtual void set(const XmlNode&) {
		
    }
    virtual void set(const map<string, string>&) {
    }
    
     virtual bool accept(const string&) { return false; }
    
    virtual GribAddressMode* clone() const {
        MagLog::dev() << "GribAddressMode::set(const map<string, string&)---> to be checked!...\n";
        return new GribAddressMode();
    }
    virtual void toxml(ostream&, int = 0) const {
        MagLog::dev() << "GribAddressMode::toxml(ostream&, int = 0)---> to be checked!...\n";
    }
    virtual grib_handle* operator()(grib_context*, FILE*, int) const {
        MagLog::dev() << "GribAddressMode::toxml(ostream&, int = 0)---> to be checked!...\n";
        return 0;
    }
    virtual grib_handle* operator()(grib_context*, FILE*, long int) const {
        MagLog::dev() << "GribAddressMode::toxml(ostream&, int = 0)---> to be checked!...\n";
        return 0;
    }
    
protected:
     //! Method to print string about this class on to a stream of type ostream (virtual).
	 virtual void print(ostream& out) const { out << "GribAddressMode\n"; } 

private:
    //! Copy constructor - No copy allowed
	GribAddressMode(const GribAddressMode&);
    //! Overloaded << operator to copy - No copy allowed
	GribAddressMode& operator=(const GribAddressMode&);

// -- Friends
    //! Overloaded << operator to call print().
	friend ostream& operator<<(ostream& s,const GribAddressMode& p)
		{ p.print(s); return s; }

};

class GribAddressRecordMode : public GribAddressMode
{
public :
	GribAddressRecordMode() {}
	~GribAddressRecordMode() {}

	virtual GribAddressMode* clone() const {
		GribAddressMode* mode = new GribAddressRecordMode();
		return mode;
	}

	virtual grib_handle* operator()(grib_context*, FILE* file, int position) const
	{
		grib_handle* handle = 0;


		grib_context* context = grib_context_get_default();
		int error;
		for (int i = 0; i < position-1; i++)
		{
			 //grib_read_any_from_file_alloc (context, file,  &msg , &size);
			 //grib_context_free(context,msg);
			 //MagLog::debug() << "call to grib_handle_new_from_file for position " << i << "\n";
				handle = grib_handle_new_from_file(context, file, &error) ;
				grib_handle_delete(handle);
		}

		handle = grib_handle_new_from_file(0, file, &error) ;

		return handle;
	}
    
protected :
	void print(ostream& out) const { out << "GribAddressRecordMode\n"; }
};

class GribAddressByteMode : public GribAddressMode
{
public:
	GribAddressByteMode() {}
	~GribAddressByteMode() {}
	virtual GribAddressMode* clone() const {
		GribAddressMode* mode = new GribAddressByteMode();
		return mode;
	}
	
	virtual grib_handle* operator()(grib_context* context, FILE* file, int position) const
	{
		long int offset = (long int)  position;
		cout << "OFFSET-->" << offset << endl;
		fseek(file, (long int)  position, SEEK_SET);
        grib_handle* handle = 0;

		int error;
		handle = grib_handle_new_from_file(0, file, &error) ;

		return handle;
           
    }
	virtual grib_handle* operator()(grib_context* context, FILE* file, long int position) const
		{


			fseek(file, position, SEEK_SET);
	        grib_handle* handle = 0;

			int error;
			handle = grib_handle_new_from_file(0, file, &error) ;

			return handle;

	    }
    
protected :
    void print(ostream& out) const { out << "GribAddressRecordMode\n"; } 
    
};



template <>
class MagTranslator<string, GribAddressMode> { 
public:
	GribAddressMode* operator()(const string& val )
	{
		return SimpleObjectMaker<GribAddressMode>::create(val);
	}     

	GribAddressMode* magics(const string& param)
	{
		string val;
		ParameterManager::get(param, val);
		return (*this)(val);
	}

};

} // namespace magics
#endif
