/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2010-2014 QuakeSpasm developers

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifndef _QUAKE_SERVER_H
#define _QUAKE_SERVER_H

// server.h

typedef struct
{
	int			maxclients;
	int			maxclientslimit;
	struct client_s	*clients;		// [maxclients]
	int			serverflags;		// episode completion information
	qboolean	changelevel_issued;	// cleared when at SV_SpawnServer
} server_static_t;

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

typedef enum {ss_loading, ss_active} server_state_t;

typedef struct
{
	qboolean	active;				// false if only a net client

	qboolean	paused;
	qboolean	loadgame;			// handle connections specially

	int			lastcheck;			// used by PF_checkclient
	double		lastchecktime;

	qcvm_t		qcvm;				// Spike: entire qcvm state

	char		name[64];			// map name
	char		modelname[64];		// maps/<name>.bsp, for model_precache[0]
	const char	*model_precache[MAX_MODELS];	// NULL terminated
	struct qmodel_s	*models[MAX_MODELS];
	const char	*sound_precache[MAX_SOUNDS];	// NULL terminated
	const char	*lightstyles[MAX_LIGHTSTYLES];
	server_state_t	state;			// some actions are only valid during load

	sizebuf_t	datagram;
	byte		datagram_buf[MAX_DATAGRAM];

	sizebuf_t	reliable_datagram;	// copied to all clients at end of frame
	byte		reliable_datagram_buf[MAX_DATAGRAM];

	sizebuf_t	signon;
	byte		signon_buf[MAX_MSGLEN-2]; //johnfitz -- was 8192, now uses MAX_MSGLEN

	unsigned	protocol; //johnfitz
	unsigned	protocolflags;

	sizebuf_t	multicast;	// selectively copied to clients by the multicast builtin
	byte		multicast_buf[MAX_DATAGRAM];

	const char	*particle_precache[MAX_PARTICLETYPES];	// NULL terminated

	entity_state_t	*static_entities;
	int			num_statics;
	int			max_statics;

	struct ambientsound_s
	{
		vec3_t origin;
		unsigned int soundindex;
		float volume;
		float attenuation;
	}			*ambientsounds;
	int			num_ambients;
	int			max_ambients;

	struct svcustomstat_s
	{
		int idx;
		int type;
		int fld;
		eval_t *ptr;
	} customstats[MAX_CL_STATS*2];	//strings or numeric...
	size_t numcustomstats;
} server_t;


#define	NUM_PING_TIMES		16
#define	NUM_BASIC_SPAWN_PARMS		16
#define	NUM_TOTAL_SPAWN_PARMS		64

typedef struct client_s
{
	qboolean		active;				// false = client is free
	qboolean		spawned;			// false = don't send datagrams (set when client acked the first entities)
	qboolean		dropasap;			// has been told to go to another level
	enum
	{
		PRESPAWN_DONE,
		PRESPAWN_FLUSH=1,
//		PRESPAWN_SERVERINFO,
		PRESPAWN_MODELS,
		PRESPAWN_SOUNDS,
		PRESPAWN_PARTICLES,
		PRESPAWN_BASELINES,
		PRESPAWN_STATICS,
		PRESPAWN_AMBIENTS,
		PRESPAWN_SIGNONMSG,
	}				sendsignon;			// only valid before spawned
	int				signonidx;
	unsigned int	signon_sounds;		//
	unsigned int	signon_models;		//

	double			last_message;		// reliable messages must be sent
										// periodically

	struct qsocket_s *netconnection;	// communications handle

	usercmd_t		cmd;				// movement
	vec3_t			wishdir;			// intended motion calced from cmd

	sizebuf_t		message;			// can be added to at any time,
										// copied and clear once per frame
	byte			msgbuf[MAX_MSGLEN];
	edict_t			*edict;				// EDICT_NUM(clientnum+1)
	char			name[32];			// for printing to other people
	int				colors;

	float			ping_times[NUM_PING_TIMES];
	int				num_pings;			// ping_times[num_pings%NUM_PING_TIMES]

// spawn parms are carried from level to level
	float			spawn_parms[NUM_TOTAL_SPAWN_PARMS];

// client known data for deltas
	int				old_frags;

	sizebuf_t		datagram;
	byte			datagram_buf[MAX_DATAGRAM];

	unsigned int	limit_entities;		//vanilla is 600
	unsigned int	limit_unreliable;	//max allowed size for unreliables
	unsigned int	limit_reliable;		//max (total) size of a reliable message.
	unsigned int	limit_models;		//
	unsigned int	limit_sounds;		//
	qboolean		pextknown;
	unsigned int	protocol_pext1;
	unsigned int	protocol_pext2;
	unsigned int	resendstatsnum[MAX_CL_STATS/32];	//the stats which need to be resent.
	unsigned int	resendstatsstr[MAX_CL_STATS/32];	//the stats which need to be resent.
	int				oldstats_i[MAX_CL_STATS];		//previous values of stats. if these differ from the current values, reflag resendstats.
	float			oldstats_f[MAX_CL_STATS];		//previous values of stats. if these differ from the current values, reflag resendstats.
	char			*oldstats_s[MAX_CL_STATS];
	struct entity_num_state_s{
		unsigned int num;	//ascending order, there can be gaps.
		entity_state_t state;
	} *previousentities;
	size_t numpreviousentities;
	size_t maxpreviousentities;
	unsigned int snapshotresume;
	unsigned int *pendingentities_bits;	//UF_ flags for each entity
	size_t numpendingentities;	//realloc if too small
					#define	SENDFLAG_PRESENT	0x80000000u	//tracks that we previously sent one of these ents (resulting in a remove if the ent gets remove()d).
					#define	SENDFLAG_REMOVE		0x40000000u	//for packetloss to signal that we need to resend a remove.
					#define	SENDFLAG_USABLE		0x00ffffffu	//SendFlags bits that the qc is actually able to use (don't get confused if the mod uses SendFlags=-1).
	struct deltaframe_s
	{	//quick overview of how this stuff actually works:
		//when the server notices a gap in the ack sequence, we walk through the dropped frames and reflag everything that was dropped.
		//if the server isn't tracking enough frames, then we just treat those as dropped;
		//small note: when an entity is new, it re-flags itself as new for the next packet too, this reduces the immediate impact of packetloss on new entities.
		//reflagged state includes stats updates, entity updates, and entity removes.
		int				sequence;	//to see if its stale
		float			timestamp;	
		unsigned int	resendstatsnum[MAX_CL_STATS/32];
		unsigned int	resendstatsstr[MAX_CL_STATS/32];
		struct
		{
			unsigned int num;
			unsigned int ebits;
			unsigned int csqcbits;
		} *ents;
		int numents;	//doesn't contain an entry for every entity, just ones that were sent this frame. no 0 bits
		int maxents;
	} *frames;
	size_t numframes;	//preallocated power-of-two
	int lastacksequence;
	int lastmovemessage;
	double lastmovetime;
	qboolean		knowntoqc;			// putclientinserver was called
} client_t;


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

// edict->movetype values
#define	MOVETYPE_NONE			0		// never moves
#define	MOVETYPE_ANGLENOCLIP	1
#define	MOVETYPE_ANGLECLIP		2
#define	MOVETYPE_WALK			3		// gravity
#define	MOVETYPE_STEP			4		// gravity, special edge handling
#define	MOVETYPE_FLY			5
#define	MOVETYPE_TOSS			6		// gravity
#define	MOVETYPE_PUSH			7		// no clip to world, push and crush
#define	MOVETYPE_NOCLIP			8
#define	MOVETYPE_FLYMISSILE		9		// extra size to monsters
#define	MOVETYPE_BOUNCE			10
#define	MOVETYPE_GIB			11		// 2021 rerelease gibs

// edict->solid values
#define	SOLID_NOT				0		// no interaction with other objects
#define	SOLID_TRIGGER			1		// touch on edge, but not blocking
#define	SOLID_BBOX				2		// touch on edge, block
#define	SOLID_SLIDEBOX			3		// touch on edge, but not an onground
#define	SOLID_BSP				4		// bsp clip, touch on edge, block

// edict->deadflag values
#define	DEAD_NO					0
#define	DEAD_DYING				1
#define	DEAD_DEAD				2

#define	DAMAGE_NO				0
#define	DAMAGE_YES				1
#define	DAMAGE_AIM				2

// edict->flags
#define	FL_FLY					1
#define	FL_SWIM					2
//#define	FL_GLIMPSE				4
#define	FL_CONVEYOR				4
#define	FL_CLIENT				8
#define	FL_INWATER				16
#define	FL_MONSTER				32
#define	FL_GODMODE				64
#define	FL_NOTARGET				128
#define	FL_ITEM					256
#define	FL_ONGROUND				512
#define	FL_PARTIALGROUND		1024	// not all corners are valid
#define	FL_WATERJUMP			2048	// player jumping out of water
#define	FL_JUMPRELEASED			4096	// for jump debouncing

// entity effects

#define	EF_BRIGHTFIELD			1
#define	EF_MUZZLEFLASH 			2
#define	EF_BRIGHTLIGHT 			4
#define	EF_DIMLIGHT 			8

#define	SPAWNFLAG_NOT_EASY			256
#define	SPAWNFLAG_NOT_MEDIUM		512
#define	SPAWNFLAG_NOT_HARD			1024
#define	SPAWNFLAG_NOT_DEATHMATCH	2048

#define	MSG_BROADCAST		0	// unreliable to all
#define	MSG_ONE				1	// reliable to one (msg_entity)
#define	MSG_ALL				2	// reliable to all
#define	MSG_INIT			3	// write to the init string
#define	MSG_EXT_MULTICAST	4	// temporary buffer that can be splurged more reliably / with more control.
#define	MSG_EXT_ENTITY		5	// for csqc networking. we don't actually support this. I'm just defining it for completeness.

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

extern	cvar_t	teamplay;
extern	cvar_t	skill;
extern	cvar_t	deathmatch;
extern	cvar_t	coop;
extern	cvar_t	fraglimit;
extern	cvar_t	timelimit;

extern	server_static_t	svs;				// persistant server info
extern	server_t		sv;					// local server

extern	client_t	*host_client;

extern	edict_t		*sv_player;

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

void SV_Init (void);

void SV_StartParticle (vec3_t org, vec3_t dir, int color, int count);
void SV_StartSound (edict_t *entity, float *origin, int channel, 
                    const char *sample, int volume, float attenuation);

void SV_DropClient (qboolean crash);

void SVFTE_Ack(client_t *client, int sequence);
void SVFTE_DestroyFrames(client_t *client);
void SV_BuildEntityState(edict_t *ent, entity_state_t *state);
void SV_SendClientMessages (void);
void SV_ClearDatagram (void);

int SV_ModelIndex (const char *name);

void SV_SetIdealPitch (void);

void SV_AddUpdates (void);

void SV_ClientThink (void);
void SV_AddClientToServer (struct qsocket_s	*ret);

void SV_ClientPrintf (const char *fmt, ...) FUNC_PRINTF(1,2);
void SV_BroadcastPrintf (const char *fmt, ...) FUNC_PRINTF(1,2);

void SV_Physics (void);

qboolean SV_CheckBottom (edict_t *ent);
qboolean SV_movestep (edict_t *ent, vec3_t move, qboolean relink);

void SV_WriteClientdataToMessage (client_t *client, sizebuf_t *msg);

void SV_MoveToGoal (void);

void SV_ConnectClient (int clientnum);	//called from the netcode to add new clients. also called from pr_ext to spawn new botclients.
void SV_CheckForNewClients (void);
void SV_RunClients (void);
void SV_SaveSpawnparms ();
void SV_SpawnServer (const char *server);

#endif	/* _QUAKE_SERVER_H */