/*
 * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 */

#ifndef _UNITEVENTS
#define _UNITEVENTS

#include "Common.h"

class ThreatContainer;
class ThreatManager;
class HostileReference;

//==============================================================
//==============================================================

enum UNIT_EVENT_TYPE
{
    // Player/Pet changed on/offline status
    UEV_THREAT_REF_ONLINE_STATUS        = 1 << 0,

    // Threat for Player/Pet changed
    UEV_THREAT_REF_THREAT_CHANGE        = 1 << 1,

    // Player/Pet will be removed from list (dead) [for internal use]
    UEV_THREAT_REF_REMOVE_FROM_LIST     = 1 << 2,

    // Player/Pet entered/left  water or some other place where it is/was not accessible for the creature
    UEV_THREAT_REF_ASSECCIBLE_STATUS    = 1 << 3,

    // Threat list is going to be sorted (if dirty flag is set)
    UEV_THREAT_SORT_LIST                = 1 << 4,

    // New target should be fetched, could tbe the current target as well
    UEV_THREAT_SET_NEXT_TARGET          = 1 << 5,

    // A new victim (target) was set. Could be nullptr
    UEV_THREAT_VICTIM_CHANGED           = 1 << 6,

    // Future use
    //UEV_UNIT_KILLED                   = 1<<7,

    //Future use
    //UEV_UNIT_HEALTH_CHANGE            = 1<<8,
};

#define UEV_THREAT_REF_EVENT_MASK (UEV_THREAT_REF_ONLINE_STATUS | UEV_THREAT_REF_THREAT_CHANGE | UEV_THREAT_REF_REMOVE_FROM_LIST | UEV_THREAT_REF_ASSECCIBLE_STATUS)
#define UEV_THREAT_MANAGER_EVENT_MASK (UEV_THREAT_SORT_LIST | UEV_THREAT_SET_NEXT_TARGET | UEV_THREAT_VICTIM_CHANGED)
#define UEV_ALL_EVENT_MASK (0xffffffff)

// Future use
//#define UEV_UNIT_EVENT_MASK (UEV_UNIT_KILLED | UEV_UNIT_HEALTH_CHANGE)

//==============================================================

class UnitBaseEvent
{
private:
    uint32 iType;
public:
    UnitBaseEvent(uint32 pType) { iType = pType; }
    [[nodiscard]] uint32 getType() const { return iType; }
    [[nodiscard]] bool matchesTypeMask(uint32 pMask) const { return iType & pMask; }

    void setType(uint32 pType) { iType = pType; }
};

//==============================================================

class ThreatRefStatusChangeEvent : public UnitBaseEvent
{
private:
    HostileReference* iHostileReference;
    union
    {
        float iFValue;
        int32 iIValue;
        bool iBValue;
    };
    ThreatManager* iThreatManager;
public:
    ThreatRefStatusChangeEvent(uint32 pType) : UnitBaseEvent(pType), iThreatManager(nullptr) { iHostileReference = nullptr; }

    ThreatRefStatusChangeEvent(uint32 pType, HostileReference* pHostileReference) : UnitBaseEvent(pType), iThreatManager(nullptr) { iHostileReference = pHostileReference; }

    ThreatRefStatusChangeEvent(uint32 pType, HostileReference* pHostileReference, float pValue) : UnitBaseEvent(pType), iThreatManager(nullptr) { iHostileReference = pHostileReference; iFValue = pValue; }

    ThreatRefStatusChangeEvent(uint32 pType, HostileReference* pHostileReference, bool pValue) : UnitBaseEvent(pType), iThreatManager(nullptr) { iHostileReference = pHostileReference; iBValue = pValue; }

    [[nodiscard]] int32 getIValue() const { return iIValue; }

    [[nodiscard]] float getFValue() const { return iFValue; }

    [[nodiscard]] bool getBValue() const { return iBValue; }

    void setBValue(bool pValue) { iBValue = pValue; }

    [[nodiscard]] HostileReference* getReference() const { return iHostileReference; }

    void setThreatManager(ThreatManager* pThreatManager) { iThreatManager = pThreatManager; }

    [[nodiscard]] ThreatManager* getThreatManager() const { return iThreatManager; }
};

//==============================================================

class ThreatManagerEvent : public ThreatRefStatusChangeEvent
{
private:
    ThreatContainer* iThreatContainer;
public:
    ThreatManagerEvent(uint32 pType) : ThreatRefStatusChangeEvent(pType), iThreatContainer(nullptr) {}
    ThreatManagerEvent(uint32 pType, HostileReference* pHostileReference) : ThreatRefStatusChangeEvent(pType, pHostileReference), iThreatContainer(nullptr) {}

    void setThreatContainer(ThreatContainer* pThreatContainer) { iThreatContainer = pThreatContainer; }

    [[nodiscard]] ThreatContainer* getThreatContainer() const { return iThreatContainer; }
};

//==============================================================
#endif