//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//=============================================================================//

#ifndef TRIGGERS_H
#define TRIGGERS_H
#ifdef _WIN32
#pragma once
#endif

#include "basetoggle.h"
#include "entityoutput.h"

//
// Spawnflags
//

enum {
    SF_TRIGGER_ALLOW_CLIENTS = 0x01,    // Players can fire this trigger
    SF_TRIGGER_ALLOW_NPCS = 0x02,       // NPCS can fire this trigger
    SF_TRIGGER_ALLOW_PUSHABLES = 0x04,  // Pushables can fire this trigger
    SF_TRIGGER_ALLOW_PHYSICS = 0x08,    // Physics objects can fire this trigger
    SF_TRIGGER_ONLY_PLAYER_ALLY_NPCS =
        0x10,  // *if* NPCs can fire this trigger, this flag means only player
               // allies do so
    SF_TRIGGER_ONLY_CLIENTS_IN_VEHICLES =
        0x20,  // *if* Players can fire this trigger, this flag means only
               // players inside vehicles can
    SF_TRIGGER_ALLOW_ALL =
        0x40,  // Everything can fire this trigger EXCEPT DEBRIS!
    SF_TRIGGER_ONLY_CLIENTS_OUT_OF_VEHICLES =
        0x200,  // *if* Players can fire this trigger, this flag means only
                // players outside vehicles can
    SF_TRIG_PUSH_ONCE = 0x80,  // trigger_push removes itself after firing once
    SF_TRIG_PUSH_AFFECT_PLAYER_ON_LADDER =
        0x100,  // if pushed object is player on a ladder, then this disengages
                // them from the ladder (HL2only)
    SF_TRIG_TOUCH_DEBRIS = 0x400,  // Will touch physics debris objects
    SF_TRIGGER_ONLY_NPCS_IN_VEHICLES =
        0X800,  // *if* NPCs can fire this trigger, only NPCs in vehicles do so
                // (respects player ally flag too)
    SF_TRIGGER_DISALLOW_BOTS =
        0x1000,  // Bots are not allowed to fire this trigger
};

// DVS TODO: get rid of CBaseToggle
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
class CBaseTrigger : public CBaseToggle {
    DECLARE_CLASS(CBaseTrigger, CBaseToggle);

   public:
    CBaseTrigger();

    void Activate(void);
    virtual void PostClientActive(void);
    void InitTrigger(void);

    void Enable(void);
    void Disable(void);
    void Spawn(void);
    void UpdateOnRemove(void);
    void TouchTest(void);

    // Input handlers
    virtual void InputEnable(inputdata_t &inputdata);
    virtual void InputDisable(inputdata_t &inputdata);
    virtual void InputToggle(inputdata_t &inputdata);
    virtual void InputTouchTest(inputdata_t &inputdata);

    virtual void InputStartTouch(inputdata_t &inputdata);
    virtual void InputEndTouch(inputdata_t &inputdata);

    virtual bool UsesFilter(void) { return (m_hFilter.Get() != NULL); }
    virtual bool PassesTriggerFilters(CBaseEntity *pOther);
    virtual void StartTouch(CBaseEntity *pOther);
    virtual void EndTouch(CBaseEntity *pOther);
    virtual void StartTouchAll() {}
    virtual void EndTouchAll() {}
    bool IsTouching(CBaseEntity *pOther);

    CBaseEntity *GetTouchedEntityOfType(const char *sClassName);

    int DrawDebugTextOverlays(void);

    // by default, triggers don't deal with TraceAttack
    void TraceAttack(CBaseEntity *pAttacker, float flDamage,
                     const Vector &vecDir, trace_t *ptr, int bitsDamageType) {}

    bool PointIsWithin(const Vector &vecPoint);

    bool m_bDisabled;
    string_t m_iFilterName;
    CHandle<class CBaseFilter> m_hFilter;

   protected:
    // Outputs
    COutputEvent m_OnStartTouch;
    COutputEvent m_OnStartTouchAll;
    COutputEvent m_OnEndTouch;
    COutputEvent m_OnEndTouchAll;
    COutputEvent m_OnTouching;
    COutputEvent m_OnNotTouching;

    // Entities currently being touched by this trigger
    CUtlVector<EHANDLE> m_hTouchingEntities;

    DECLARE_DATADESC();
};

//-----------------------------------------------------------------------------
// Purpose: Variable sized repeatable trigger.  Must be targeted at one or more
// entities.
//			If "delay" is set, the trigger waits some time after
//activating before firing. 			"wait" : Seconds between triggerings. (.2
//default/minimum)
//-----------------------------------------------------------------------------
class CTriggerMultiple : public CBaseTrigger {
    DECLARE_CLASS(CTriggerMultiple, CBaseTrigger);

   public:
    void Spawn(void);
    void MultiTouch(CBaseEntity *pOther);
    void MultiWaitOver(void);
    void ActivateMultiTrigger(CBaseEntity *pActivator);

    DECLARE_DATADESC();

    // Outputs
    COutputEvent m_OnTrigger;
};

// Global list of triggers that care about weapon fire
extern CUtlVector<CHandle<CTriggerMultiple> > g_hWeaponFireTriggers;

//------------------------------------------------------------------------------
// Base VPhysics trigger implementation
// NOTE: This uses vphysics to compute touch events.  It doesn't do a per-frame
// Touch call, so the Entity I/O is different from a regular trigger
//------------------------------------------------------------------------------
#define SF_VPHYSICS_MOTION_MOVEABLE 0x1000

class CBaseVPhysicsTrigger : public CBaseEntity {
    DECLARE_CLASS(CBaseVPhysicsTrigger, CBaseEntity);

   public:
    DECLARE_DATADESC();

    virtual void Spawn();
    virtual void UpdateOnRemove();
    virtual bool CreateVPhysics();
    virtual void Activate(void);
    virtual bool PassesTriggerFilters(CBaseEntity *pOther);

    // UNDONE: Pass trigger event in or change Start/EndTouch.  Add
    // ITriggerVPhysics perhaps? BUGBUG: If a player touches two of these, his
    // movement will screw up. BUGBUG: If a player uses crouch/uncrouch it will
    // generate touch events and clear the motioncontroller flag
    virtual void StartTouch(CBaseEntity *pOther);
    virtual void EndTouch(CBaseEntity *pOther);

    void InputToggle(inputdata_t &inputdata);
    void InputEnable(inputdata_t &inputdata);
    void InputDisable(inputdata_t &inputdata);

   protected:
    bool m_bDisabled;
    string_t m_iFilterName;
    CHandle<class CBaseFilter> m_hFilter;
};

//-----------------------------------------------------------------------------
// Purpose: Hurts anything that touches it. If the trigger has a targetname,
//			firing it will toggle state.
//-----------------------------------------------------------------------------

// This class is to get around the fact that DEFINE_FUNCTION doesn't like
// multiple inheritance
class CTriggerHurtShim : public CBaseTrigger {
    virtual void RadiationThink(void) = 0;
    virtual void HurtThink(void) = 0;

   public:
    void RadiationThinkShim(void) { RadiationThink(); }
    void HurtThinkShim(void) { HurtThink(); }
};

DECLARE_AUTO_LIST(ITriggerHurtAutoList);
class CTriggerHurt : public CTriggerHurtShim, public ITriggerHurtAutoList {
   public:
    CTriggerHurt() {
        // This field came along after levels were built so the field defaults
        // to 20 here in the constructor.
        m_flDamageCap = 20.0f;
    }

    DECLARE_CLASS(CTriggerHurt, CTriggerHurtShim);

    void Spawn(void);
    void RadiationThink(void);
    void HurtThink(void);
    void Touch(CBaseEntity *pOther);
    void EndTouch(CBaseEntity *pOther);
    bool HurtEntity(CBaseEntity *pOther, float damage);
    int HurtAllTouchers(float dt);

    DECLARE_DATADESC();

    float m_flOriginalDamage;  // Damage as specified by the level designer.
    float m_flDamage;          // Damage per second.
    float m_flDamageCap;       // Maximum damage per second.
    float m_flLastDmgTime;     // Time that we last applied damage.
    float m_flDmgResetTime;    // For forgiveness, the time to reset the counter
                               // that accumulates damage.
    int m_bitsDamageInflict;   // DMG_ damage type that the door or tigger does
    int m_damageModel;
    bool m_bNoDmgForce;  // Should damage from this trigger impart force on what
                         // it's hurting

    enum {
        DAMAGEMODEL_NORMAL = 0,
        DAMAGEMODEL_DOUBLE_FORGIVENESS,
    };

    // Outputs
    COutputEvent m_OnHurt;
    COutputEvent m_OnHurtPlayer;

    CUtlVector<EHANDLE> m_hurtEntities;
};

bool IsTakingTriggerHurtDamageAtPoint(const Vector &vecPoint);

#endif  // TRIGGERS_H