// Emacs style mode select	 -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// DESCRIPTION:  none
//		Implements special effects:
//		Texture animation, height or lighting changes
//		 according to adjacent sectors, respective
//		 utility functions, etc.
//
//-----------------------------------------------------------------------------

#ifndef __P_SPEC__
#define __P_SPEC__

#include "dsectoreffect.h"
#include "doomdata.h"
#include "r_state.h"

class FScanner;
struct level_info_t;

struct FThinkerCollection
{
	int RefNum;
	DThinker *Obj;
};

enum class EScroll : int
{
		sc_side,
		sc_floor,
		sc_ceiling,
		sc_carry,
		sc_carry_ceiling,	// killough 4/11/98: carry objects hanging on ceilings
};

enum EScrollPos : int
{
	scw_top = 1,
	scw_mid = 2,
	scw_bottom = 4,
	scw_all = 7,
};

void P_CreateScroller(EScroll type, double dx, double dy, int control, int affectee, int accel, EScrollPos scrollpos = EScrollPos::scw_all);


//jff 2/23/98 identify the special classes that can share sectors

typedef enum
{
	floor_special,
	ceiling_special,
	lighting_special,
} special_e;

// Factor to scale scrolling effect into mobj-carrying properties = 3/32.
// (This is so scrolling floors and objects on them can move at same speed.)
const double CARRYFACTOR = 3 / 32.;

// Flags for P_SectorDamage
#define DAMAGE_PLAYERS				1
#define DAMAGE_NONPLAYERS			2
#define DAMAGE_IN_AIR				4
#define DAMAGE_SUBCLASSES_PROTECT	8


// [RH] If a deathmatch game, checks to see if noexit is enabled.
//		If so, it kills the player and returns false. Otherwise,
//		it returns true, and the player is allowed to live.
bool	CheckIfExitIsGood (AActor *self, level_info_t *info);

// at map load
void	P_SpawnSpecials (void);

// every tic
void	P_UpdateSpecials (void);

// when needed
bool	P_ActivateLine (line_t *ld, AActor *mo, int side, int activationType, DVector3 *optpos = NULL);
bool	P_TestActivateLine (line_t *ld, AActor *mo, int side, int activationType, DVector3 *optpos = NULL);
bool	P_PredictLine (line_t *ld, AActor *mo, int side, int activationType);

void 	P_PlayerInSpecialSector (player_t *player, sector_t * sector=NULL);
void	P_PlayerOnSpecialFlat (player_t *player, int floorType);
void	P_SectorDamage(int tag, int amount, FName type, PClassActor *protectClass, int flags);
void	P_SetSectorFriction (int tag, int amount, bool alterFlag);
double FrictionToMoveFactor(double friction);
void P_GiveSecret(AActor *actor, bool printmessage, bool playsound, int sectornum);

//
// getNextSector()
// Return sector_t * of sector next to current.
// NULL if not two-sided line
//
inline sector_t *getNextSector (line_t *line, const sector_t *sec)
{
	if (!(line->flags & ML_TWOSIDED))
		return NULL;

	return line->frontsector == sec ?
		   (line->backsector != sec ? line->backsector : NULL) :
	       line->frontsector;
}


#include "p_tags.h"

class DLighting : public DSectorEffect
{
	DECLARE_CLASS(DLighting, DSectorEffect)
public:
	DLighting(sector_t *sector);
protected:
	DLighting();
};

void	EV_StartLightFlickering (int tag, int upper, int lower);
void	EV_StartLightStrobing (int tag, int upper, int lower, int utics, int ltics);
void	EV_StartLightStrobing (int tag, int utics, int ltics);
void	EV_TurnTagLightsOff (int tag);
void	EV_LightTurnOn (int tag, int bright);
void	EV_LightTurnOnPartway (int tag, double frac);	// killough 10/98
void	EV_LightChange (int tag, int value);
void	EV_StopLightEffect (int tag);

void	P_SpawnGlowingLight (sector_t *sector);

void	EV_StartLightGlowing (int tag, int upper, int lower, int tics);
void	EV_StartLightFading (int tag, int value, int tics);


//
// P_SWITCH
//

#define BUTTONTIME TICRATE		// 1 second, in ticks. 

bool	P_ChangeSwitchTexture (side_t *side, int useAgain, BYTE special, bool *quest=NULL);
bool	P_CheckSwitchRange(AActor *user, line_t *line, int sideno, const DVector3 *optpos = NULL);

//
// P_PLATS
//
class DPlat : public DMovingFloor
{
	DECLARE_CLASS (DPlat, DMovingFloor)
public:
	enum EPlatState
	{
		up,
		down,
		waiting,
		in_stasis
	};

	enum EPlatType
	{
		platPerpetualRaise,
		platDownWaitUpStay,
		platDownWaitUpStayStone,
		platUpWaitDownStay,
		platUpNearestWaitDownStay,
		platDownByValue,
		platUpByValue,
		platUpByValueStay,
		platRaiseAndStay,
		platToggle,
		platDownToNearestFloor,
		platDownToLowestCeiling,
		platRaiseAndStayLockout,
	};

	void Serialize (FArchive &arc);
	void Tick ();

	bool IsLift() const { return m_Type == platDownWaitUpStay || m_Type == platDownWaitUpStayStone; }

protected:
	DPlat (sector_t *sector);

	double	 	m_Speed;
	double	 	m_Low;
	double	 	m_High;
	int 		m_Wait;
	int 		m_Count;
	EPlatState	m_Status;
	EPlatState	m_OldStatus;
	int			m_Crush;
	int 		m_Tag;
	EPlatType	m_Type;

	void PlayPlatSound (const char *sound);
	void Reactivate ();
	void Stop ();

private:
	DPlat ();

	friend bool	EV_DoPlat (int tag, line_t *line, EPlatType type,
						   double height, double speed, int delay, int lip, int change);
	friend void EV_StopPlat (int tag);
	friend void P_ActivateInStasis (int tag);
};

bool EV_DoPlat (int tag, line_t *line, DPlat::EPlatType type,
				double height, double speed, int delay, int lip, int change);
void EV_StopPlat (int tag);
void P_ActivateInStasis (int tag);

//
// [RH]
// P_PILLAR
//

class DPillar : public DMover
{
	DECLARE_CLASS (DPillar, DMover)
	HAS_OBJECT_POINTERS
public:
	enum EPillar
	{
		pillarBuild,
		pillarOpen

	};

	DPillar (sector_t *sector, EPillar type, double speed, double height,
			 double height2, int crush, bool hexencrush);

	void Serialize (FArchive &arc);
	void Tick ();
	void Destroy();

protected:
	EPillar		m_Type;
	double		m_FloorSpeed;
	double		m_CeilingSpeed;
	double		m_FloorTarget;
	double		m_CeilingTarget;
	int			m_Crush;
	bool		m_Hexencrush;
	TObjPtr<DInterpolation> m_Interp_Ceiling;
	TObjPtr<DInterpolation> m_Interp_Floor;

private:
	DPillar ();
};

bool EV_DoPillar (DPillar::EPillar type, line_t *line, int tag,
				  double speed, double height, double height2, int crush, bool hexencrush);

//
// P_DOORS
//
class DDoor : public DMovingCeiling
{
	DECLARE_CLASS (DDoor, DMovingCeiling)
public:
	enum EVlDoor
	{
		doorClose,
		doorOpen,
		doorRaise,
		doorWaitRaise,
		doorCloseWaitOpen,
		doorWaitClose,
	};

	DDoor (sector_t *sector);
	DDoor (sector_t *sec, EVlDoor type, double speed, int delay, int lightTag, int topcountdown);

	void Serialize (FArchive &arc);
	void Tick ();
protected:
	EVlDoor		m_Type;
	double	 	m_TopDist;
	double		m_BotDist, m_OldFloorDist;
	vertex_t	*m_BotSpot;
	double	 	m_Speed;

	// 1 = up, 0 = waiting at top, -1 = down
	int 		m_Direction;
	
	// tics to wait at the top
	int 		m_TopWait;
	// (keep in case a door going down is reset)
	// when it reaches 0, start going down
	int 		m_TopCountdown;

	int			m_LightTag;

	void DoorSound (bool raise, class DSeqNode *curseq=NULL) const;

	friend bool	EV_DoDoor (DDoor::EVlDoor type, line_t *line, AActor *thing,
						   int tag, double speed, int delay, int lock,
						   int lightTag, bool boomgen, int topcountdown);
private:
	DDoor ();

};

bool EV_DoDoor (DDoor::EVlDoor type, line_t *line, AActor *thing,
				int tag, double speed, int delay, int lock,
				int lightTag, bool boomgen = false, int topcountdown = 0);


class DAnimatedDoor : public DMovingCeiling
{
	DECLARE_CLASS (DAnimatedDoor, DMovingCeiling)
public:
	DAnimatedDoor (sector_t *sector);
	DAnimatedDoor (sector_t *sec, line_t *line, int speed, int delay, FDoorAnimation *anim);

	void Serialize (FArchive &arc);
	void Tick ();

	bool StartClosing ();
protected:
	line_t *m_Line1, *m_Line2;
	int m_Frame;
	FDoorAnimation *m_DoorAnim;
	int m_Timer;
	double m_BotDist;
	int m_Status;
	enum
	{
		Opening,
		Waiting,
		Closing,
		Dead
	};
	int m_Speed;
	int m_Delay;
	bool m_SetBlocking1, m_SetBlocking2;

	friend bool EV_SlidingDoor (line_t *line, AActor *thing, int tag, int speed, int delay);
private:
	DAnimatedDoor ();
};

bool EV_SlidingDoor (line_t *line, AActor *thing, int tag, int speed, int delay);

//
// P_CEILNG
//

// [RH] Changed these
class DCeiling : public DMovingCeiling
{
	DECLARE_CLASS (DCeiling, DMovingCeiling)
public:
	enum ECeiling
	{
		ceilLowerByValue,
		ceilRaiseByValue,
		ceilMoveToValue,
		ceilLowerToHighestFloor,
		ceilLowerInstant,
		ceilRaiseInstant,
		ceilCrushAndRaise,
		ceilLowerAndCrush,
		ceil_placeholder,
		ceilCrushRaiseAndStay,
		ceilRaiseToNearest,
		ceilLowerToLowest,
		ceilLowerToFloor,

		// The following are only used by Generic_Ceiling
		ceilRaiseToHighest,
		ceilLowerToHighest,
		ceilRaiseToLowest,
		ceilLowerToNearest,
		ceilRaiseToHighestFloor,
		ceilRaiseToFloor,
		ceilRaiseByTexture,
		ceilLowerByTexture,

		genCeilingChg0,
		genCeilingChgT,
		genCeilingChg
	};

	enum class ECrushMode
	{
		crushDoom = 0,
		crushHexen = 1,
		crushSlowdown = 2
	};


	DCeiling (sector_t *sec);
	DCeiling (sector_t *sec, double speed1, double speed2, int silent);

	void Serialize (FArchive &arc);
	void Tick ();

protected:
	ECeiling	m_Type;
	double	 	m_BottomHeight;
	double	 	m_TopHeight;
	double	 	m_Speed;
	double		m_Speed1;		// [RH] dnspeed of crushers
	double		m_Speed2;		// [RH] upspeed of crushers
	int 		m_Crush;
	ECrushMode	m_CrushMode;
	int			m_Silent;
	int 		m_Direction;	// 1 = up, 0 = waiting, -1 = down

	// [RH] Need these for BOOM-ish transferring ceilings
	FTextureID	m_Texture;
	secspecial_t m_NewSpecial;

	// ID
	int 		m_Tag;
	int 		m_OldDirection;

	void PlayCeilingSound ();

private:
	DCeiling ();

	friend bool P_CreateCeiling(sector_t *sec, DCeiling::ECeiling type, line_t *line, int tag, double speed, double speed2, double height, int crush, int silent, int change, DCeiling::ECrushMode hexencrush);
	friend bool EV_CeilingCrushStop (int tag);
	friend void P_ActivateInStasisCeiling (int tag);
};

bool P_CreateCeiling(sector_t *sec, DCeiling::ECeiling type, line_t *line, int tag, double speed, double speed2, double height, int crush, int silent, int change, DCeiling::ECrushMode hexencrush);
bool EV_DoCeiling (DCeiling::ECeiling type, line_t *line, int tag, double speed, double speed2, double height, int crush, int silent, int change, DCeiling::ECrushMode hexencrush = DCeiling::ECrushMode::crushDoom);

bool EV_CeilingCrushStop (int tag);
void P_ActivateInStasisCeiling (int tag);



//
// P_FLOOR
//

class DFloor : public DMovingFloor
{
	DECLARE_CLASS (DFloor, DMovingFloor)
public:
	enum EFloor
	{
		floorLowerToLowest,
		floorLowerToNearest,
		floorLowerToHighest,
		floorLowerByValue,
		floorRaiseByValue,
		floorRaiseToHighest,
		floorRaiseToNearest,
		floorRaiseAndCrush,
		floorRaiseAndCrushDoom,
		floorCrushStop,
		floorLowerInstant,
		floorRaiseInstant,
		floorMoveToValue,
		floorRaiseToLowestCeiling,
		floorRaiseByTexture,

		floorLowerAndChange,
		floorRaiseAndChange,

		floorRaiseToLowest,
		floorRaiseToCeiling,
		floorLowerToLowestCeiling,
		floorLowerByTexture,
		floorLowerToCeiling,

		donutRaise,

		buildStair,
		waitStair,
		resetStair,

		// Not to be used as parameters to EV_DoFloor()
		genFloorChg0,
		genFloorChgT,
		genFloorChg
	};

	// [RH] Changed to use Hexen-ish specials
	enum EStair
	{
		buildUp,
		buildDown
	};

	enum EStairType
	{
		stairUseSpecials = 1,
		stairSync = 2
	};

	DFloor (sector_t *sec);

	void Serialize (FArchive &arc);
	void Tick ();

//protected:
	EFloor	 	m_Type;
	int 		m_Crush;
	bool		m_Hexencrush;
	int 		m_Direction;
	secspecial_t m_NewSpecial;
	FTextureID	m_Texture;
	double	 	m_FloorDestDist;
	double	 	m_Speed;

	// [RH] New parameters used to reset and delay stairs
	double		m_OrgDist;
	int			m_ResetCount;
	int			m_Delay;
	int			m_PauseTime;
	int			m_StepTime;
	int			m_PerStepTime;

	void StartFloorSound ();
	void SetFloorChangeType (sector_t *sec, int change);

	friend bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
		double stairsize, double speed, int delay, int reset, int igntxt,
		int usespecials);
	friend bool EV_DoFloor (DFloor::EFloor floortype, line_t *line, int tag,
		double speed, double height, int crush, int change, bool hexencrush, bool hereticlower);
	friend bool EV_FloorCrushStop (int tag);
	friend bool EV_DoDonut (int tag, line_t *line, double pillarspeed, double slimespeed);
private:
	DFloor ();
};

bool P_CreateFloor(sector_t *sec, DFloor::EFloor floortype, line_t *line,
	double speed, double height, int crush, int change, bool hexencrush, bool hereticlower);

bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
	double stairsize, double speed, int delay, int reset, int igntxt,
	int usespecials);
bool EV_DoFloor(DFloor::EFloor floortype, line_t *line, int tag,
	double speed, double height, int crush, int change, bool hexencrush, bool hereticlower = false);

bool EV_FloorCrushStop (int tag);
bool EV_DoDonut (int tag, line_t *line, double pillarspeed, double slimespeed);

class DElevator : public DMover
{
	DECLARE_CLASS (DElevator, DMover)
	HAS_OBJECT_POINTERS
public:
	enum EElevator
	{
		elevateUp,
		elevateDown,
		elevateCurrent,
		// [RH] For FloorAndCeiling_Raise/Lower
		elevateRaise,
		elevateLower
	};

	DElevator (sector_t *sec);

	void Destroy();
	void Serialize (FArchive &arc);
	void Tick ();

protected:
	EElevator	m_Type;
	int			m_Direction;
	double		m_FloorDestDist;
	double		m_CeilingDestDist;
	double		m_Speed;
	TObjPtr<DInterpolation> m_Interp_Ceiling;
	TObjPtr<DInterpolation> m_Interp_Floor;

	void StartFloorSound ();

	friend bool EV_DoElevator (line_t *line, DElevator::EElevator type, double speed, double height, int tag);
private:
	DElevator ();
};

bool EV_DoElevator (line_t *line, DElevator::EElevator type, double speed, double height, int tag);

class DWaggleBase : public DMover
{
	DECLARE_CLASS (DWaggleBase, DMover)
	HAS_OBJECT_POINTERS
public:
	DWaggleBase (sector_t *sec);

	void Serialize (FArchive &arc);

protected:
	double m_OriginalDist;
	double m_Accumulator;
	double m_AccDelta;
	double m_TargetScale;
	double m_Scale;
	double m_ScaleDelta;
	int m_Ticker;
	int m_State;
	TObjPtr<DInterpolation> m_Interpolation;

	friend bool EV_StartWaggle (int tag, line_t *line, int height, int speed,
		int offset, int timer, bool ceiling);

	void DoWaggle (bool ceiling);
	void Destroy();
	DWaggleBase ();
};

bool EV_StartWaggle (int tag, line_t *line, int height, int speed,
	int offset, int timer, bool ceiling);

class DFloorWaggle : public DWaggleBase
{
	DECLARE_CLASS (DFloorWaggle, DWaggleBase)
public:
	DFloorWaggle (sector_t *sec);
	void Tick ();
private:
	DFloorWaggle ();
};

class DCeilingWaggle : public DWaggleBase
{
	DECLARE_CLASS (DCeilingWaggle, DWaggleBase)
public:
	DCeilingWaggle (sector_t *sec);
	void Tick ();
private:
	DCeilingWaggle ();
};

//jff 3/15/98 pure texture/type change for better generalized support
enum EChange
{
	trigChangeOnly,
	numChangeOnly,
};

bool EV_DoChange (line_t *line, EChange changetype, int tag);



//
// P_TELEPT
//
enum
{
	TELF_DESTFOG			= 1,
	TELF_SOURCEFOG			= 2,
	TELF_KEEPORIENTATION	= 4,
	TELF_KEEPVELOCITY		= 8,
	TELF_KEEPHEIGHT			= 16,
};

//Spawns teleport fog. Pass the actor to pluck TeleFogFromType and TeleFogToType. 'from' determines if this is the fog to spawn at the old position (true) or new (false).
void P_SpawnTeleportFog(AActor *mobj, const DVector3 &pos, bool beforeTele = true, bool setTarget = false);

bool P_Teleport(AActor *thing, DVector3 pos, DAngle angle, int flags);
bool EV_Teleport (int tid, int tag, line_t *line, int side, AActor *thing, int flags);
bool EV_SilentLineTeleport (line_t *line, int side, AActor *thing, int id, INTBOOL reverse);
bool EV_TeleportOther (int other_tid, int dest_tid, bool fog);
bool EV_TeleportGroup (int group_tid, AActor *victim, int source_tid, int dest_tid, bool moveSource, bool fog);
bool EV_TeleportSector (int tag, int source_tid, int dest_tid, bool fog, int group_tid);


//
// [RH] ACS (see also p_acs.h)
//

#define ACS_BACKSIDE		1
#define ACS_ALWAYS			2
#define ACS_WANTRESULT		4
#define ACS_NET				8

int  P_StartScript (AActor *who, line_t *where, int script, const char *map, const int *args, int argcount, int flags);
void P_SuspendScript (int script, const char *map);
void P_TerminateScript (int script, const char *map);
void P_DoDeferedScripts (void);

//
// [RH] p_quake.c
//
bool P_StartQuakeXYZ(AActor *activator, int tid, int intensityX, int intensityY, int intensityZ, int duration, int damrad, int tremrad, FSoundID quakesfx, int flags, double waveSpeedX, double waveSpeedY, double waveSpeedZ, int falloff, int highpoint);
bool P_StartQuake(AActor *activator, int tid, int intensity, int duration, int damrad, int tremrad, FSoundID quakesfx);

#endif