// -*- C++ -*-

#ifndef __index_base_h__
#define __index_base_h__

#include <cstdlib>
#include <string>
#include <vector>

#include "base_def.h"
#include "range_base.h"
#include "name.h"

namespace MultiArrayTools
{
    
    class IndexBase
    {
    public:
	DEFAULT_MEMBERS(IndexBase);
	IndexBase(const RangeBase& range, size_t pos);
	virtual ~IndexBase() = default; 
	
	virtual IndexBase& operator=(size_t pos) = 0;
	virtual IndexBase& operator++() = 0;
	virtual IndexBase& operator--() = 0;
	virtual IndexBase& operator+=(int n) = 0;
	virtual IndexBase& operator-=(int n) = 0;

	bool operator==(const IndexBase& in) const;
	bool operator!=(const IndexBase& in) const;
	
	virtual size_t dim() const = 0;
	virtual size_t pos() const;
	virtual size_t max() const;

	virtual bool last() const = 0;
	virtual bool first() const = 0;
	
	virtual operator size_t() const;
	
    protected:

	std::shared_ptr<RangeBase> mRangePtr;
	size_t mPos;
    };

    template <typename MetaType>
    class IndexInterface : public IndexBase
    {
    public:

	IndexInterface(const RangeBase& range, size_t pos);
	
	MetaType& meta() = 0;
	const MetaType& meta() const = 0;
    };
    
}

#include "index_base.cc"

#endif