// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#ifndef NL_ZONE_MANAGER_H
#define NL_ZONE_MANAGER_H

#include <string>
#include <map>
#include "nel/misc/types_nl.h"
#include "nel/3d/zone.h"

#include "nel/3d/async_file_manager_3d.h"
#include "nel/3d/zone_search.h"


namespace NL3D
{


typedef	volatile	CZone	*TVolatileZonePtr;


/**
 * CZoneManager is a class that manage zone loading around of player
 * \author Alain Saffray
 * \author Nevrax France
 * \date 2000
 * sa See Also, CZoneSearch, CTaskManager
 */
class CZoneManager : public CZoneSearch
{

public:

	/**
	 * A Work is a removed zone or a loaded zone
	 */
	struct SZoneManagerWork
	{
		// Set to true when zone is removed
		bool	ZoneRemoved;
		// Id of zone to remove
		uint16	IdZoneToRemove;
		// Name of the Zone for remove to landscape
		std::string	NameZoneRemoved;

		// Set to true when zone is added
		bool		ZoneAdded;
		// Zone for add to landscape
		CZone		*Zone;
		// Name of the Zone for add to landscape
		std::string	NameZoneAdded;
	};

public:

	/// Constructor
	CZoneManager();

	/// Destructor
	~CZoneManager();

	/// checkZonesAround : Add/Remove all zomes around a certain point
	/// If a work is currently completed remove it and began another one
	void checkZonesAround (uint x, uint y, uint area, const std::vector<uint16> *validZoneIds = NULL);

	/// Is a work has been completed ?
	bool isWorkComplete (SZoneManagerWork &rWork);

	/// Does the manager is loading ?
	bool isLoading () const {return _LoadingZones.size () != 0;}

	/// Does the manager is removing ?
	bool isRemoving () const {return _RemovingZone;}

	/// Return the count of zone left to load
	uint getNumZoneLeftToLoad ();

	/// Remove all zones
	void clear();

	/**
	 * Accessors
	 */

	/// setZonePath : Set Path for zone loading
	inline void setZonePath (std::string zonePath) { _zonePath = zonePath; }

	/// getZonePath : Get Path for zone loading
	inline std::string getZonePath (void) { return _zonePath; }

	/// set the zone tile color (if false tile are monochromed with the tile color)
	void setZoneTileColor(bool monochrome, float factor) { _ZoneTileColorMono = monochrome; _ZoneTileColorFactor = factor; }

private:

	// Zone Tile Color parameters to apply at load time : Mono = Monochrome, Factor = Multiplier
	bool _ZoneTileColorMono;
	float _ZoneTileColorFactor;

	/// Path for zone loading
	std::string _zonePath;

	std::vector<uint16> _LoadedZones;

	std::vector<uint16> _ZoneList; // Zone set at a given position
	uint32	_LastX, _LastY;
	uint32	_LastArea;

	// Object for a zone loading process
	class CLoadingZone
	{
	public:
		// Zone ID
		uint16				ZoneToAddId;

		// Zone name
		std::string			ZoneToAddName;

		// The pointer on the loaded zone
		TVolatileZonePtr	Zone;
	};

	// The synchronized list of zone waiting to be loaded
	std::list<CLoadingZone> _LoadingZones;

	// Removing Task
	bool _RemovingZone;
	uint16 _IdZoneToRemove;
};


/**
 * CZoneLoadingTask implement run methode for loading a zone for TaskManager
 * \author Alain Saffray
 * \author Nevrax France
 * \date 2000
 * sa See Also, CZoneManager, CTaskManager
 */
class CZoneLoadingTask : public NLMISC::IRunnablePos
{
public:
	/// Constructor
	CZoneLoadingTask (const std::string &sZoneName, TVolatileZonePtr *ppZone, CVector &pos, bool monochrome, float factor);
	~CZoneLoadingTask();

	/// Runnable Task
	void run (void);
	void getName (std::string &result) const;

private:

	TVolatileZonePtr	*_Zone;
	std::string			_ZoneName;
	bool				_Monochrome;
	float				_TileColorFactor;
};


} // NL3D


#endif // NL_ZONE_MANAGER_H

/* End of zone_manager.h */