#ifndef CLICKDIST_H
#define CLICKDIST_H

enum class ClickDistType {
	UNKNOWN,
	DIRECT,		// e.g. distance between cursor and an edge-point, POI, AP, Beacon, ...
	CUT,		// e.g. distance between cursor and an obstacle-line
};

/** describes distances between mouse-cursor and objects within the 2D view */
struct ClickDist {

	/** distance in pixels */
	float dst_px;

	/** distance type */
	ClickDistType type;


	/** ctor */
	ClickDist(const float dst_px, const ClickDistType type) : dst_px(dst_px), type(type) {;}

	/** max-dummy */
	static ClickDist max() {return ClickDist(9999999, ClickDistType::UNKNOWN);}


	/** distance comparison */
	bool operator < (const ClickDist o) const {
		return (this->dst_px * this->mod()) < (o.dst_px * o.mod());
	}

	/** multiply by constant */
	ClickDist operator * (const float val) const {return ClickDist(dst_px*val, type);}

//	/** weighted distance comparison based on ClickDistType */
//	bool compare(const ClickDist o) const {
//		return ((*this)*mod()) < (o*o.mod());
//	}

private:

	/**
	 * artificially modify the distance based on the given type.
	 * this enhances the selection in cases of equal distance
	 * like a POI residing dirctly one a line
	 */
	float mod() const {
		switch (type) {
			case ClickDistType::UNKNOWN:	return 1.1;
			case ClickDistType::CUT:		return 1.0;
			case ClickDistType::DIRECT:		return 0.7;
			default: throw "code error";
		}
	}

};


#endif // CLICKDIST_H