#ifndef	__HEADER_PET_SYSTEM__
#define	__HEADER_PET_SYSTEM__


class CHARACTER;

// TODO: 펫으로서의 능력치? 라던가 친밀도, 배고픔 기타등등... 수치
struct SPetAbility
{
};

/**
*/
class CPetActor //: public CHARACTER
{
public:
	enum EPetOptions
	{
		EPetOption_Followable		= 1 << 0,
		EPetOption_Mountable		= 1 << 1,
		EPetOption_Summonable		= 1 << 2,
		EPetOption_Combatable		= 1 << 3,		
	};


protected:
	friend class CPetSystem;

	CPetActor(LPCHARACTER owner, DWORD vnum, DWORD options = EPetOption_Followable | EPetOption_Summonable);
//	CPetActor(LPCHARACTER owner, DWORD vnum, const SPetAbility& petAbility, DWORD options = EPetOption_Followable | EPetOption_Summonable);

	virtual ~CPetActor();

	virtual bool	Update(DWORD deltaTime);

protected:
	virtual bool	_UpdateFollowAI();				///< 주인을 따라다니는 AI 처리
	virtual bool	_UpdatAloneActionAI(float fMinDist, float fMaxDist);			///< 주인 근처에서 혼자 노는 AI 처리

	/// @TODO
	//virtual bool	_UpdateCombatAI();

private:
	bool Follow(float fMinDistance = 50.f);

public:
	LPCHARACTER		GetCharacter()	const					{ return m_pkChar; }
	LPCHARACTER		GetOwner()	const						{ return m_pkOwner; }
	DWORD			GetVID() const							{ return m_dwVID; }
	DWORD			GetVnum() const							{ return m_dwVnum; }

	bool			HasOption(EPetOptions option) const		{ return m_dwOptions & option; }

	void			SetName(const char* petName);

	bool			Mount();
	void			Unmount();

	DWORD			Summon(const char* petName, LPITEM pSummonItem, bool bSpawnFar = false);
	void			Unsummon();

	bool			IsSummoned() const			{ return 0 != m_pkChar; }
	void			SetSummonItem (LPITEM pItem);
	DWORD			GetSummonItemVID () { return m_dwSummonItemVID; }
	// 버프 주는 함수와 거두는 함수.
	// 이게 좀 괴랄한게, 서버가 ㅄ라서, 
	// POINT_MOV_SPEED, POINT_ATT_SPEED, POINT_CAST_SPEED는 PointChange()란 함수만 써서 변경해 봐야 소용이 없는게,
	// PointChange() 이후에 어디선가 ComputePoints()를 하면 싹다 초기화되고, 
	// 더 웃긴건, ComputePoints()를 부르지 않으면 클라의 POINT는 전혀 변하지 않는다는 거다.
	// 그래서 버프를 주는 것은 ComputePoints() 내부에서 petsystem->RefreshBuff()를 부르도록 하였고,
	// 버프를 빼는 것은 ClearBuff()를 부르고, ComputePoints를 하는 것으로 한다.
	void			GiveBuff();
	void			ClearBuff();

private:
	DWORD			m_dwVnum;
	DWORD			m_dwVID;
	DWORD			m_dwOptions;
	DWORD			m_dwLastActionTime;
	DWORD			m_dwSummonItemVID;
	DWORD			m_dwSummonItemVnum;

	short			m_originalMoveSpeed;

	std::string		m_name;

	LPCHARACTER		m_pkChar;					// Instance of pet(CHARACTER)
	LPCHARACTER		m_pkOwner;

//	SPetAbility		m_petAbility;				// 능력치
};

/**
*/
class CPetSystem
{
public:
	typedef	std::unordered_map<DWORD,	CPetActor*>		TPetActorMap;		/// <VNUM, PetActor> map. (한 캐릭터가 같은 vnum의 펫을 여러개 가질 일이 있을까..??)

public:
	CPetSystem(LPCHARACTER owner);
	virtual ~CPetSystem();

	CPetActor*	GetByVID(DWORD vid) const;
	CPetActor*	GetByVnum(DWORD vnum) const;

	bool		Update(DWORD deltaTime);
	void		Destroy();

	size_t		CountSummoned() const;			///< 현재 소환된(실체화 된 캐릭터가 있는) 펫의 개수

public:
	void		SetUpdatePeriod(DWORD ms);

	CPetActor*	Summon(DWORD mobVnum, LPITEM pSummonItem, const char* petName, bool bSpawnFar, DWORD options = CPetActor::EPetOption_Followable | CPetActor::EPetOption_Summonable);

	void		Unsummon(DWORD mobVnum, bool bDeleteFromList = false);
	void		Unsummon(CPetActor* petActor, bool bDeleteFromList = false);

	// TODO: 진짜 펫 시스템이 들어갈 때 구현. (캐릭터가 보유한 펫의 정보를 추가할 때 라던가...)
	CPetActor*	AddPet(DWORD mobVnum, const char* petName, const SPetAbility& ability, DWORD options = CPetActor::EPetOption_Followable | CPetActor::EPetOption_Summonable | CPetActor::EPetOption_Combatable);

	void		DeletePet(DWORD mobVnum);
	void		DeletePet(CPetActor* petActor);
	void		RefreshBuff();

private:
	TPetActorMap	m_petActorMap;
	LPCHARACTER		m_pkOwner;					///< 펫 시스템의 Owner
	DWORD			m_dwUpdatePeriod;			///< 업데이트 주기 (ms단위)
	DWORD			m_dwLastUpdateTime;
	LPEVENT			m_pkPetSystemUpdateEvent;
};

/**
// Summon Pet
CPetSystem* petSystem = mainChar->GetPetSystem();
CPetActor* petActor = petSystem->Summon(~~~);

DWORD petVID = petActor->GetVID();
if (0 == petActor)
{
	ERROR_LOG(...)
};


// Unsummon Pet
petSystem->Unsummon(petVID);

// Mount Pet
petActor->Mount()..


CPetActor::Update(...)
{
	// AI : Follow, actions, etc...
}

*/


#endif	//__HEADER_PET_SYSTEM__