#ifndef _RAILWAY_H_
#define _RAILWAY_H_

#include "modelbahn.h"
#include "server.h"

enum {
	RAILWAY_NOTHING = 0,
	RAILWAY_NORMAL,
	RAILWAY_CROSSING,
	RAILWAY_TURNOUT,
	RAILWAY_SENSOR,
	RAILWAY_CONNECTOR,
	RAILWAY_BUTTON,					// just a simple button on the track to press
	RAILWAY_TEXT,
	RAILWAY_BLOCK,

	RAILWAY_MAX
};


#define RAILWAYS_MIN_WIDTH 40
#define RAILWAYS_MIN_HEIGHT 25
#define RAILWAYS_MAX_WIDTH 500
#define RAILWAYS_MAX_HEIGHT 500


// direktion
//
//  +---+   +---+   +---+   +---+
//  |   |   | | |   |   |   |/  |
// 0|   |  1| | |  2|---|  3|   |
//  |   |   | | |   |   |   |   |
//  +---+   +---+   +---+   +---+
//
//  +---+   +---+   +---+   +---+
//  |  \|   |   |   |   |   |   |
// 4|   |  5|   |  6|   |  7|   |
//  |   |   |  /|   |\  |   |   |
//  +---+   +---+   +---+   +---+
//
//  Enter from
//          0
//        +---+
//        |   |
//       3|   |1
//        |   |
//        +---+
//          2
enum {
	EF_NORTH = 0,
	EF_EAST,
	EF_SOUTH,
	EF_WEST
};

struct s_Railway {
	int type;
	int x;
	int y;
	int dir;
	int altdir;									// turnout or crossing
	int maxspeed;
	int flags;									// not defined yet
	char name[REFERENCENAME_LEN];				// reference name
	char lockedby[REFERENCENAME_LEN];			// element locked by locreference (only set by server, not by JSON/Webinterface)
} typedef Railway;

struct s_findway_data {
	int x;
	int y;
	int enterfrom;    // enter field from clock view (0 = North, 3 = East... 6 ... 9)
	int oldx;
	int oldy;
	int oldenterfrom;
	int dist;
	string way;
};

struct s_findway_map {
	int e;			// save entryfrom as (1 << entryfrom)
	int score;
};

class Railways {
	private:
		Railway *railways;

		int width;
		int height;
		int changed;

		pthread_mutex_t mtx;

		int Lock();
		int UnLock();
		int GetRIdx(int x, int y);
		JSONParse _GetJSONRailway(int x, int y);
		void _New (int w, int h);
		void DebugPrintFindWay(struct s_findway_map *fw);
		int _FindReference(int *x, int *y, string name, int cnt);
		int _SplitBlockIsFreeAndAllowed(string loconame, int locoflags, string block);
		int _NextPosIsValid(string loconame, int locoflags, struct s_findway_data *fwd);
		string GetDestBlock(int locoflags, string blockend);
	public:

		Railways();
		~Railways();

		void New (int w, int h);
		void SetSize (int w, int h);
		Railway Get(int x, int y);
		Railways* GetBlock(int x, int y, int w, int h);
		int Set(Railway *rw);
		int SetBlock(Railway *rw, int cnt);
		int GetHeight () {return height;};
		int GetWidth () {return width;};
		int IsChanged() { return changed; };
		void ClearChanged() { changed = 0; };
		int Change(Railway *rw);

		void ClearLockedby(string name);

		Railway RailwayGet(int x, int y) {return railways[GetRIdx(x, y)];}; // no lock
		JSONParse GetJSONRailway(int x, int y);
		JSONParse GetJSONTrack();
		void GetJSONAll(JSONParse *json);
		Railway GetRailwayFromJSON(JSONParse *j);

		int FindReference(int *x, int *y, string name, int cnt);
		int FindWay(string blockstart, string blockend, string lockedfor, string *next);
		int FindWayCheckIfNoDoubleTurnouts (string *next);
		int FindRandomWay(string blockstart, string lockedfor, string *next);
		int LockWay (string way, string lockedby, int lockonoff);
		int LockWay (string way, string lockedby) { return LockWay(way, lockedby, 1); };
		int UnLockWay (string way, string lockedby) { return LockWay(way, lockedby, 0); };
		int SetLockedby (int x, int y, string name, int locked);

		struct s_findway_data NextPos(struct s_findway_data pos, int dirtype);
};

#endif