/*
 * (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 ColourTechnique.h
    \brief Definition of the Template class ColourTechnique.
    
    Magics Team - ECMWF 2004
    
    Started: Wed 18-Aug-2004
    
    Changes:
    
*/

#ifndef ColourTechnique_H
#define ColourTechnique_H

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


namespace magics {

class LevelSelection;
class LegendVisitor;

struct ColourInfo 
{
    ColourInfo() :  index_(-1), level_(0), left_("NONE"), right_("NONE") {}
    ColourInfo(int index, double level, const Colour& left, const Colour& right) :
        index_(index), level_(level), left_(left), right_(right) {}
    
    int      index_;
    double level_;
    Colour   left_;
    Colour   right_;
};


class ColourTechniqueInterface 
{
public:
    virtual const Colour&  getMinColour() const = 0; 
    virtual const Colour&  getMaxColour() const = 0;
    virtual const string& getDirection() const = 0;
    virtual stringarray getColours() const = 0;
    virtual ListPolicy getPolicy() const = 0;
};




class ColourTechnique : public map<double, ColourInfo>  {

public:
	ColourTechnique();
	virtual ~ColourTechnique();
    virtual void set(const map<string, string>&) {}
    virtual void set(const XmlNode&) {}
    virtual bool accept(const string&) { return false; }
    virtual ColourTechnique* clone() const { return new ColourTechnique(); }
    void toxml(ostream&)  const {}
    virtual void set(const ColourTechniqueInterface&) {};
    
    Colour operator()(double) const;
    Colour left(double) const;
    Colour right(double) const;
    Colour colour(double) const;
    double leftRange(double) const;
    double rightRange(double) const;
    
    virtual void set(LevelSelection&, LevelSelection&, ColourTable&, int) const {}
    void prepare(LevelSelection&, LevelSelection&, bool rainbow = false);
    
    void colours(vector<string>&) const; 
    
	void visit(LegendVisitor&);
	ListPolicy getPolicy() const { return policy_; }

protected:
     //! Method to print string about this class on to a stream of type ostream (virtual).
	 virtual void print(ostream&) const; 
     IntervalMap<Colour> bands_;
     
     map<double, pair<double, double> > ranges_;
     double maxLevel_;
     
     ListPolicy policy_;

     




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

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

};

template<>
class MagTranslator<string, ColourTechnique> { 
public:
	ColourTechnique* operator()(const string& val ) {
		 return SimpleObjectMaker<ColourTechnique>::create(val);
	}     
    ColourTechnique* magics(const string& param)
    {
        ColourTechnique* object=0;
		ParameterManager::update(param, object);
		return object;
    }

};


} // namespace magics
#endif
