vcmi/lib/mapObjects/CObjectHandler.h

#pragma once

#include "ObjectTemplate.h"

#include "../IGameCallback.h"
#include "../int3.h"
#include "../HeroBonus.h"

/*
 * CObjectHandler.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 CGHeroInstance;
struct BattleResult;

class DLL_LINKAGE IObjectInterface
{
public:
	static IGameCallback *cb;

	IObjectInterface();
	virtual ~IObjectInterface();

	virtual void onHeroVisit(const CGHeroInstance * h) const;
	virtual void onHeroLeave(const CGHeroInstance * h) const;
	virtual void newTurn() const;
	virtual void initObj(); //synchr
	virtual void setProperty(ui8 what, ui32 val);//synchr
	
	//Called when queries created DURING HERO VISIT are resolved
	//First parameter is always hero that visited object and triggered the query
	virtual void battleFinished(const CGHeroInstance *hero, const BattleResult &result) const;
	virtual void blockingDialogAnswered(const CGHeroInstance *hero, ui32 answer) const;
	virtual void garrisonDialogClosed(const CGHeroInstance *hero) const;
	virtual void heroLevelUpDone(const CGHeroInstance *hero) const;

//unified interface, AI helpers
	virtual bool wasVisited (PlayerColor player) const;
	virtual bool wasVisited (const CGHeroInstance * h) const;

	static void preInit(); //called before objs receive their initObj
	static void postInit();//called after objs receive their initObj

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		logGlobal->errorStream() << "IObjectInterface serialized, unexpected, should not happen!";
	}
};

class DLL_LINKAGE IBoatGenerator
{
public:
	const CGObjectInstance *o;

	IBoatGenerator(const CGObjectInstance *O);
	virtual ~IBoatGenerator() {}

	virtual int getBoatType() const; //0 - evil (if a ship can be evil...?), 1 - good, 2 - neutral
	virtual void getOutOffsets(std::vector<int3> &offsets) const =0; //offsets to obj pos when we boat can be placed
	int3 bestLocation() const; //returns location when the boat should be placed

	enum EGeneratorState {GOOD, BOAT_ALREADY_BUILT, TILE_BLOCKED, NO_WATER};
	EGeneratorState shipyardStatus() const; //0 - can buid, 1 - there is already a boat at dest tile, 2 - dest tile is blocked, 3 - no water
	void getProblemText(MetaString &out, const CGHeroInstance *visitor = nullptr) const;

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		h & o;
	}
};

class DLL_LINKAGE IShipyard : public IBoatGenerator
{
public:
	IShipyard(const CGObjectInstance *O);
	virtual ~IShipyard() {}

	virtual void getBoatCost(std::vector<si32> &cost) const;

	static const IShipyard *castFrom(const CGObjectInstance *obj);
	static IShipyard *castFrom(CGObjectInstance *obj);

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		h & static_cast<IBoatGenerator&>(*this);
	}
};

class DLL_LINKAGE CGObjectInstance : public IObjectInterface
{
public:
	mutable std::string hoverName;

	/// Position of bottom-right corner of object on map
	int3 pos;
	/// Type of object, e.g. town, hero, creature.
	Obj ID;
	/// Subtype of object, depends on type
	si32 subID;
	/// Index of object in map's list of objects
	ObjectInstanceID id;
	/// Defines appearance of object on map (animation, blocked tiles, blit order, etc)
	ObjectTemplate appearance;
	/// Current owner of an object (when below PLAYER_LIMIT)
	PlayerColor tempOwner;
	/// If true hero can visit this object only from neighbouring tiles and can't stand on this object
	bool blockVisit;

	CGObjectInstance();
	~CGObjectInstance();

	/// "center" tile from which the sight distance is calculated
	int3 getSightCenter() const;

	PlayerColor getOwner() const;
	void setOwner(PlayerColor ow);

	/// APPEARANCE ACCESSORS ///

	int getWidth() const; //returns width of object graphic in tiles
	int getHeight() const; //returns height of object graphic in tiles
	bool visitableAt(int x, int y) const; //returns true if object is visitable at location (x, y) (h3m pos)
	int3 visitablePos() const;
	bool blockingAt(int x, int y) const; //returns true if object is blocking location (x, y) (h3m pos)
	bool coveringAt(int x, int y) const; //returns true if object covers with picture location (x, y) (h3m pos)
	std::set<int3> getBlockedPos() const; //returns set of positions blocked by this object
	std::set<int3> getBlockedOffsets() const; //returns set of relative positions blocked by this object
	bool isVisitable() const; //returns true if object is visitable

	/// HELPERS THAT SHOULD BE REMOVED ///

	/// fills set with tiles which are visible from this object. TODO: remove?
	void getSightTiles(std::unordered_set<int3, ShashInt3> &tiles) const;
	/// Hides tiles visible for any player but ours. TODO: move to callback/game state?
	void hideTiles(PlayerColor ourplayer, int radius) const;

	/// VIRTUAL METHODS ///

	/// Returns true if player can pass through visitable tiles of this object
	virtual bool passableFor(PlayerColor color) const;
	/// Range of revealed map around this object, counting from getSightCenter()
	virtual int getSightRadious() const;
	/// returns (x,y,0) offset to a visitable tile of object
	virtual int3 getVisitableOffset() const;
	/// returns text visible in status bar
	/// TODO: should accept selected hero as parameter and possibly - moved into object handler
	virtual const std::string & getHoverText() const;
	/// Called mostly during map randomization to turn random object into a regular one (e.g. "Random Monster" into "Pikeman")
	virtual void setType(si32 ID, si32 subID);

	///IObjectInterface OVERRIDES

	void initObj() override;
	void onHeroVisit(const CGHeroInstance * h) const override;
	/// method for synchronous update. Note: For new properties classes should override setPropertyDer instead
	void setProperty(ui8 what, ui32 val) override;

	//friend class CGameHandler;

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		h & hoverName & pos & ID & subID & id & tempOwner & blockVisit & appearance;
		//definfo is handled by map serializer
	}
protected:
	/// virtual method that allows synchronously update object state on server and all clients
	virtual void setPropertyDer(ui8 what, ui32 val);

	/// Adds (visited) text if selected hero has visited object
	/// TODO: remove?
	void getNameVis(std::string &hname) const;
	/// Gives dummy bonus from this object to hero. Can be used to track visited state
	void giveDummyBonus(ObjectInstanceID heroID, ui8 duration = Bonus::ONE_DAY) const;
};

/// function object which can be used to find an object with an specific sub ID
class CGObjectInstanceBySubIdFinder
{
public:
	CGObjectInstanceBySubIdFinder(CGObjectInstance * obj);
	bool operator()(CGObjectInstance * obj) const;

private:
	CGObjectInstance * obj;
};

class DLL_LINKAGE CObjectHandler
{
public:
	std::vector<ui32> resVals; //default values of resources in gold

	CObjectHandler();

	template <typename Handler> void serialize(Handler &h, const int version)
	{
		h & resVals;
	}
};