#pragma once
#include "Tile.h"
#include "TilePos.h"
#include "Definitions.h"

class Random;
class HitResult;
class ChunkRebuildData;

using namespace std;

class RailTile : public Tile
{
	friend class Tile;
	friend class ChunkRebuildData;
public:
	static const int DIR_FLAT_Z = 0;
    static const int DIR_FLAT_X = 1;
    // the data bit is used by boosters and detectors, so they can't turn
    static const int RAIL_DATA_BIT = 8;
    static const int RAIL_DIRECTION_MASK = 7;

private:
	Icon *iconTurn;

	bool usesDataBit;

     class Rail
	 {
		 friend class RailTile;
	 private:
		Level *level;
        int x, y, z;
        bool usesDataBit;
        vector<TilePos *> connections;
		bool m_bValidRail; // 4J added

	 public:
		 Rail(Level *level, int x, int y, int z);
		 ~Rail();
	 private:
		 void updateConnections(int direction);
		void removeSoftConnections();
		bool hasRail(int x, int y, int z);
		Rail *getRail(TilePos *p);
		bool connectsTo(Rail *rail);
		bool hasConnection(int x, int y, int z);
		int countPotentialConnections();
		bool canConnectTo(Rail *rail);
	 private:
		void connectTo(Rail *rail);
		bool hasNeighborRail(int x, int y, int z);
	 public:
        void place(bool hasSignal, bool first);
	};
public:
	static bool isRail(Level *level, int x, int y, int z);
    static bool isRail(int id);
protected:
	RailTile(int id, bool usesDataBit);
public:
	using Tile::getResourceCount;

	bool isUsesDataBit();
    virtual AABB *getAABB(Level *level, int x, int y, int z);
    virtual bool blocksLight();
    virtual bool isSolidRender(bool isServerLevel = false);
    virtual HitResult *clip(Level *level, int xt, int yt, int zt, Vec3 *a, Vec3 *b);
    virtual void updateShape(LevelSource *level, int x, int y, int z, int forceData = -1, shared_ptr<TileEntity> forceEntity = shared_ptr<TileEntity>());	// 4J added forceData, forceEntity param
    virtual Icon *getTexture(int face, int data);
	virtual bool isCubeShaped();
    virtual int getRenderShape();
    virtual int getResourceCount(Random random);
    virtual bool mayPlace(Level *level, int x, int y, int z);
    virtual void onPlace(Level *level, int x, int y, int z);
    virtual void neighborChanged(Level *level, int x, int y, int z, int type);
private:
	void updateDir(Level *level, int x, int y, int z, bool first);
    bool findGoldenRailSignal(Level *level, int x, int y, int z, int data, bool forward, int searchDepth);
    bool isGoldenRailWithPower(Level *level, int x, int y, int z, bool forward, int searchDepth, int dir);
public:
	virtual int getPistonPushReaction();
	void registerIcons(IconRegister *iconRegister);
};