#ifndef GRIDNODE_H
#define GRIDNODE_H

#include "GridNodeBBox.h"
#include "GridPoint.h"

template<int, typename> class Grid;


/**
 * INTERNAL DATASTRUCTURE
 * this data-structure is internally used by the Grid
 * to store additional information for each node besides
 * the user's requested data-structure
 */
class GridNode {

	template<int, typename> friend class Grid;

	/** INTERNAL: array-index */
	int _idx = -1;

	/** INTERNAL: number of neighbors */
	int _numNeighbors = 0;

	/** INTERNAL: store neighbors (via index) */
	int _neighbors[12] = {};

public:

	GridNode() {;}

	/** get the node's index within its grid */
	int getIdx() const {return _idx;}

	/** get the number of neighbors for this node */
	int getNumNeighbors() const {return _numNeighbors;}

	/** get the n-th neighbor for this node */
	template <int gridSize_cm, typename T> inline T& getNeighbor(const int nth, const Grid<gridSize_cm, T>& grid) const {
		return grid.getNeighbor(_idx, nth);
	}

};

#endif // GRIDNODE_H