#ifndef __MAPHANDLER_H__
#define __MAPHANDLER_H__
#include "global.h"
#include <list>
#include <set>

/*
 * mapHandler.h, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */

class CGObjectInstance;
class CGHeroInstance;
struct Mapa;
class CGDefInfo;
class CGObjectInstance;
class CDefHandler;
struct TerrainTile;
struct SDL_Surface;
struct SDL_Rect;
class CDefEssential;

struct TerrainTile2
{
	int3 pos;
	const TerrainTile *tileInfo;
	SDL_Surface * terbitmap; //frames of terrain animation
	std::vector<SDL_Surface *> rivbitmap; //frames of river animation
	std::vector<SDL_Surface *> roadbitmap; //frames of road animation

	std::vector < std::pair<const CGObjectInstance*,SDL_Rect> > objects; //pointers to objects being on this tile with rects to be easier to blit this tile on screen
	TerrainTile2();
};

//pathfinder
//	map<int,int> iDTerenu=>koszt_pola
//	map<int,int> IDdrogi=>koszt_drogi
template <typename T> class PseudoV
{
public:
	int offset;
	std::vector<T> inver;
	PseudoV(){};
	PseudoV(std::vector<T> &src, int rest, int before, int after, const T& fill)
	{
		inver.resize(before + rest + after);
		offset=before;
		for(int i=0; i<before;i++)
			inver[i] = fill;
		for(int i=0;i<src.size();i++)
			inver[offset+i] = src[i];
		for(int i=src.size(); i<src.size()+after;i++)
			inver[offset+i] = fill;
	}
	inline T & operator[](const int & n)
	{
		return inver[n+offset];
	}
	inline const T & operator[](const int & n) const
	{
		return inver[n+offset];
	}
	void resize(int rest, int before, int after)
	{
		inver.resize(before + rest + after);
		offset=before;
	}
	int size() const
	{
		return inver.size();
	}
};
class CMapHandler
{
public:
	PseudoV< PseudoV< PseudoV<TerrainTile2> > > ttiles; //informations about map tiles
	int3 sizes; //map size (x = width, y = height, z = number of levels)
	Mapa * map;

	// Size of the map window in pixels. This doesn't have to be a multiple of tiles.
	int mapW;
	int mapH;

	// Max number of tiles that will fit in the map screen. Tiles
	// can be partial on each edges.
	int tilesW;
	int tilesH;

	// size of each side of the frame around the whole map, in tiles
	int frameH;
	int frameW;

	// Coord in pixels of the top left corner of the top left tile to
	// draw. Values range is [-31..0]. A negative value
	// implies that part of the tile won't be displayed.
	int offsetX;
	int offsetY;

	std::set<int> usedHeroes;
	CDefHandler * fullHide; //for Fog of War
	CDefHandler * partialHide; //for For of War

	std::vector<std::vector<SDL_Surface *> > terrainGraphics; // [terrain id] [view type] [rotation type]
	std::vector<CDefEssential *> roadDefs;
	std::vector<CDefEssential *> staticRiverDefs;
	std::vector<CDefEssential*> defs;

	std::map<std::string, CDefEssential*> loadedDefs; //pointers to loaded defs (key is filename, uppercase)

	std::vector<std::vector<std::vector<unsigned char> > > hideBitmap; //specifies number of graphic that should be used to fully hide a tile

	CMapHandler(); //c-tor
	~CMapHandler(); //d-tor

	void loadDefs();
	SDL_Surface * getVisBitmap(int x, int y, const std::vector< std::vector< std::vector<unsigned char> > > & visibilityMap, int lvl);

	int getCost(int3 & a, int3 & b, const CGHeroInstance * hero);
	std::vector< std::string > getObjDescriptions(int3 pos); //returns desriptions of objects blocking given position
	//std::vector< CGObjectInstance * > getVisitableObjs(int3 pos); //returns vector of visitable objects at certain position
	CGObjectInstance * createObject(int id, int subid, int3 pos, int owner=254); //creates a new object with a certain id and subid
	std::string getDefName(int id, int subid); //returns name of def for object with given id and subid
	bool printObject(const CGObjectInstance * obj); //puts appropriate things to ttiles, so obj will be visible on map
	bool hideObject(const CGObjectInstance * obj); //removes appropriate things from ttiles, so obj will be no longer visible on map (but still will exist)
	bool removeObject(CGObjectInstance * obj); //removes object from each place in VCMI (I hope)
	void initHeroDef(CGHeroInstance * h);
	void init();
	void calculateBlockedPos();
	void initObjectRects();
	void borderAndTerrainBitmapInit();
	void roadsRiverTerrainInit();
	void prepareFOWDefs();

	void terrainRect(int3 top_tile, unsigned char anim, std::vector< std::vector< std::vector<unsigned char> > > * visibilityMap, bool otherHeroAnim, unsigned char heroAnim, SDL_Surface * extSurf, const SDL_Rect * extRect, int moveX, int moveY);
	void updateWater();
	unsigned char getHeroFrameNum(const unsigned char & dir, const bool & isMoving) const; //terrainRect helper function
	void validateRectTerr(SDL_Rect * val, const SDL_Rect * ext); //terrainRect helper
	static unsigned char getDir(const int3 & a, const int3 & b); //returns direction number in range 0 - 7 (0 is left top, clockwise) [direction: form a to b]

};


#endif // __MAPHANDLER_H__