//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: AI system that makes NPCs verbally respond to game events
//
//=============================================================================//

#ifndef AI_EVENTRESPONSE_H
#define AI_EVENTRESPONSE_H

#include "utldict.h"

#define NPCEVENTRESPONSE_DISTANCE_SQR \
    (768 * 768)  // Maximum distance for responding to NPCs
#define NPCEVENTRESPONSE_REFIRE_TIME \
    15.0  // Time after giving a response before giving any more
#define NPCEVENTRESPONSE_GIVEUP_TIME \
    4.0  // Time after a response trigger was fired before discarding it without
         // responding

//-----------------------------------------------------------------------------
// Purpose: AI system that makes NPCs verbally respond to game events
//-----------------------------------------------------------------------------
class CNPCEventResponseSystem : public CAutoGameSystemPerFrame {
   public:
    CNPCEventResponseSystem(char const *name) : CAutoGameSystemPerFrame(name) {}

    void LevelInitPreEntity();
    void FrameUpdatePreEntityThink();
    void TriggerEvent(const char *pResponse, bool bForce, bool bCancelScript);

   private:
    float m_flNextEventPoll;

    struct storedevent_t {
        float flEventTime;
        float flNextResponseTime;
        bool bForce;
        bool bCancelScript;
        bool bPreventExpiration;
    };

    typedef CUtlDict<storedevent_t, int> EventMap;
    EventMap m_ActiveEvents;
};

CNPCEventResponseSystem *NPCEventResponse();

#endif  // AI_EVENTRESPONSE_H