#pragma once

#include <unordered_map>

#include "Pathfinder.h"

class DijkstraPathfinder : public Pathfinder {
	using Pathfinder::Pathfinder;

public:
	virtual void find_between(const XY &, const XY &);
	virtual const Path & get_path();

protected:
	virtual void clear();

private:
	Path solution;
	XY end;

	struct Node {
		unsigned int distance = -1;
		XY parent;
	};
	struct Neighbor {
		unsigned int distance = -1;
		XY position;
	};

	Node & map_get(const XY &);
	std::unordered_map<XY, Node> map;

	void dijkstra(const XY &);
};