/*
Copyright (C) 1996-1997 Id Software, Inc.

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.

*/
// server.h

#ifndef SERVER_H
#define SERVER_H

typedef struct server_static_s
{
	// number of svs.clients slots (updated by maxplayers command)
	int maxclients;
	// client slots
	struct client_s *clients;
	// episode completion information
	int serverflags;
	// cleared when at SV_SpawnServer
	qboolean changelevel_issued;
	// server infostring
	char serverinfo[MAX_SERVERINFO_STRING];
	// performance data
	float perf_cpuload;
	float perf_lost;
	float perf_offset_avg;
	float perf_offset_max;
	float perf_offset_sdev;
	// temporary performance data accumulators
	float perf_acc_realtime;
	float perf_acc_sleeptime;
	float perf_acc_lost;
	float perf_acc_offset;
	float perf_acc_offset_squared;
	float perf_acc_offset_max;
	int perf_acc_offset_samples;
} server_static_t;

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

typedef enum server_state_e {ss_loading, ss_active} server_state_t;

#define MAX_CONNECTFLOODADDRESSES 16
typedef struct server_connectfloodaddress_s
{
	double lasttime;
	lhnetaddress_t address;
}
server_connectfloodaddress_t;

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

	qboolean paused;
	// handle connections specially
	qboolean loadgame;

	// one of the PROTOCOL_ values
	protocolversion_t protocol;

	double time;

	double frametime;

	// used by PF_checkclient
	int lastcheck;
	double lastchecktime;

	// crc of clientside progs at time of level start
	int csqc_progcrc; // -1 = no progs
	int csqc_progsize; // -1 = no progs
	char csqc_progname[MAX_QPATH]; // copied from csqc_progname at level start
	unsigned char *csqc_progdata;
	size_t csqc_progsize_deflated;
	unsigned char *csqc_progdata_deflated;

	// collision culling data
	world_t world;

	// map name
	char name[64];
	// maps/<name>.bsp, for model_precache[0]
	char modelname[64];
	struct model_s *worldmodel;
	// NULL terminated
	// LordHavoc: precaches are now MAX_QPATH rather than a pointer
	// updated by SV_ModelIndex
	char model_precache[MAX_MODELS][MAX_QPATH];
	struct model_s *models[MAX_MODELS];
	// NULL terminated
	// LordHavoc: precaches are now MAX_QPATH rather than a pointer
	// updated by SV_SoundIndex
	char sound_precache[MAX_SOUNDS][MAX_QPATH];
	char lightstyles[MAX_LIGHTSTYLES][64];
	// some actions are only valid during load
	server_state_t state;

	sizebuf_t datagram;
	unsigned char datagram_buf[NET_MAXMESSAGE];

	// copied to all clients at end of frame
	sizebuf_t reliable_datagram;
	unsigned char reliable_datagram_buf[NET_MAXMESSAGE];

	sizebuf_t signon;
	// LordHavoc: increased signon message buffer from 8192
	unsigned char signon_buf[NET_MAXMESSAGE];

	// connection flood blocking
	// note this is in server_t rather than server_static_t so that it is
	// reset on each map command (such as New Game in singleplayer)
	server_connectfloodaddress_t connectfloodaddresses[MAX_CONNECTFLOODADDRESSES];

#define SV_MAX_PARTICLEEFFECTNAME 256
	qboolean particleeffectnamesloaded;
	char particleeffectname[SV_MAX_PARTICLEEFFECTNAME][MAX_QPATH];

	int writeentitiestoclient_stats_culled_pvs;
	int writeentitiestoclient_stats_culled_trace;
	int writeentitiestoclient_stats_visibleentities;
	int writeentitiestoclient_stats_totalentities;
	int writeentitiestoclient_cliententitynumber;
	int writeentitiestoclient_clientnumber;
	sizebuf_t *writeentitiestoclient_msg;
	vec3_t writeentitiestoclient_testeye;
	int writeentitiestoclient_pvsbytes;
	unsigned char writeentitiestoclient_pvs[MAX_MAP_LEAFS/8];
	entity_state_t writeentitiestoclient_sendstates[MAX_EDICTS];

	int numsendentities;
	entity_state_t sendentities[MAX_EDICTS];
	entity_state_t *sendentitiesindex[MAX_EDICTS];

	int sententitiesmark;
	int sententities[MAX_EDICTS];
	int sententitiesconsideration[MAX_EDICTS];

	// legacy support for self.Version based csqc entity networking
	unsigned char csqcentityversion[MAX_EDICTS]; // legacy
} server_t;

#define NUM_CSQCENTITIES_PER_FRAME 1024
typedef struct csqcentityframedb_s
{
	int framenum;
	int num;
	unsigned short entno[NUM_CSQCENTITIES_PER_FRAME];
	int sendflags[NUM_CSQCENTITIES_PER_FRAME];
} csqcentityframedb_t;

// if defined this does ping smoothing, otherwise it does not
//#define NUM_PING_TIMES 16

#define NUM_SPAWN_PARMS 16

typedef struct client_s
{
	// false = empty client slot
	qboolean active;
	// false = don't do ClientDisconnect on drop
	qboolean clientconnectcalled;
	// false = don't send datagrams
	qboolean spawned;
	// 1 = send svc_serverinfo and advance to 2, 2 doesn't send, then advances to 0 (allowing unlimited sending) when prespawn is received
	int sendsignon;

	// requested rate in bytes per second
	int rate;

	// realtime this client connected
	double connecttime;

	// keepalive messages must be sent periodically during signon
	double keepalivetime;

	// communications handle
	netconn_t *netconnection;

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

	// PRVM_EDICT_NUM(clientnum+1)
	prvm_edict_t *edict;

#ifdef NUM_PING_TIMES
	float ping_times[NUM_PING_TIMES];
	// ping_times[num_pings%NUM_PING_TIMES]
	int num_pings;
#endif
	// LordHavoc: can be used for prediction or whatever...
	float ping;

	// this is used by sv_clmovement_minping code
	double clmovement_disabletimeout;
	// this is used by sv_clmvoement_waitforinput code
	int clmovement_skipphysicsframes;

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

	// properties that are sent across the network only when changed
	char name[64], old_name[64];
	int colors, old_colors;
	int frags, old_frags;
	char playermodel[MAX_QPATH], old_model[MAX_QPATH];
	char playerskin[MAX_QPATH], old_skin[MAX_QPATH];

	// netaddress support
	char netaddress[MAX_QPATH];

	// visibility state
	float visibletime[MAX_EDICTS];

	// scope is whether an entity is currently being networked to this client
	// sendflags is what properties have changed on the entity since the last
	// update that was sent
	int csqcnumedicts;
	unsigned char csqcentityscope[MAX_EDICTS];
	unsigned int csqcentitysendflags[MAX_EDICTS];

#define NUM_CSQCENTITYDB_FRAMES 64
	unsigned char csqcentityglobalhistory[MAX_EDICTS]; // set to 1 if the entity was ever csqc networked to the client, and never reset back to 0
	csqcentityframedb_t csqcentityframehistory[NUM_CSQCENTITYDB_FRAMES];
	int csqcentityframehistory_next;

	// prevent animated names
	float nametime;

	// latest received clc_ackframe (used to detect packet loss)
	int latestframenum;

	// cache weaponmodel name lookups
	char weaponmodel[MAX_QPATH];
	int weaponmodelindex;

	// clientcamera (entity to use as camera)
	int clientcamera;

	entityframe_database_t *entitydatabase;
	entityframe4_database_t *entitydatabase4;
	entityframe5_database_t *entitydatabase5;

	// delta compression of stats
	unsigned char statsdeltabits[(MAX_CL_STATS+7)/8];
	int stats[MAX_CL_STATS];

	unsigned char unreliablemsg_data[NET_MAXMESSAGE];
	sizebuf_t unreliablemsg;
	int unreliablemsg_splitpoints;
	int unreliablemsg_splitpoint[NET_MAXMESSAGE/16];

	// information on an active download if any
	qfile_t *download_file;
	int download_expectedposition; // next position the client should ack
	qboolean download_started;
	char download_name[MAX_QPATH];
	qboolean download_deflate;

	// fixangle data
	qboolean fixangle_angles_set;
	vec3_t fixangle_angles;

	// demo recording
	qfile_t *sv_demo_file;
} 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_BOUNCEMISSILE	11		// bounce w/o gravity
#define MOVETYPE_FOLLOW			12		// track movement of aiment
#define MOVETYPE_FAKEPUSH		13		// tenebrae's push that doesn't push

// 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
// LordHavoc: corpse code
#define	SOLID_CORPSE			5		// same as SOLID_BBOX, except it behaves as SOLID_NOT against SOLID_SLIDEBOX objects (players/monsters)

// 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_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

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

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

extern cvar_t coop;
extern cvar_t deathmatch;
extern cvar_t fraglimit;
extern cvar_t gamecfg;
extern cvar_t noexit;
extern cvar_t nomonsters;
extern cvar_t pausable;
extern cvar_t pr_checkextension;
extern cvar_t samelevel;
extern cvar_t saved1;
extern cvar_t saved2;
extern cvar_t saved3;
extern cvar_t saved4;
extern cvar_t savedgamecfg;
extern cvar_t scratch1;
extern cvar_t scratch2;
extern cvar_t scratch3;
extern cvar_t scratch4;
extern cvar_t skill;
extern cvar_t slowmo;
extern cvar_t sv_accelerate;
extern cvar_t sv_aim;
extern cvar_t sv_airaccel_qw;
extern cvar_t sv_airaccel_sideways_friction;
extern cvar_t sv_airaccelerate;
extern cvar_t sv_allowdownloads;
extern cvar_t sv_allowdownloads_archive;
extern cvar_t sv_allowdownloads_config;
extern cvar_t sv_allowdownloads_dlcache;
extern cvar_t sv_allowdownloads_inarchive;
extern cvar_t sv_areagrid_mingridsize;
extern cvar_t sv_checkforpacketsduringsleep;
extern cvar_t sv_clmovement_enable;
extern cvar_t sv_clmovement_minping;
extern cvar_t sv_clmovement_minping_disabletime;
extern cvar_t sv_clmovement_waitforinput;
extern cvar_t sv_cullentities_nevercullbmodels;
extern cvar_t sv_cullentities_pvs;
extern cvar_t sv_cullentities_stats;
extern cvar_t sv_cullentities_trace;
extern cvar_t sv_cullentities_trace_delay;
extern cvar_t sv_cullentities_trace_enlarge;
extern cvar_t sv_cullentities_trace_prediction;
extern cvar_t sv_cullentities_trace_samples;
extern cvar_t sv_cullentities_trace_samples_extra;
extern cvar_t sv_debugmove;
extern cvar_t sv_echobprint;
extern cvar_t sv_edgefriction;
extern cvar_t sv_entpatch;
extern cvar_t sv_fixedframeratesingleplayer;
extern cvar_t sv_freezenonclients;
extern cvar_t sv_friction;
extern cvar_t sv_gameplayfix_blowupfallenzombies;
extern cvar_t sv_gameplayfix_delayprojectiles;
extern cvar_t sv_gameplayfix_droptofloorstartsolid;
extern cvar_t sv_gameplayfix_droptofloorstartsolid_nudgetocorrect;
extern cvar_t sv_gameplayfix_easierwaterjump;
extern cvar_t sv_gameplayfix_findradiusdistancetobox;
extern cvar_t sv_gameplayfix_grenadebouncedownslopes;
extern cvar_t sv_gameplayfix_multiplethinksperframe;
extern cvar_t sv_gameplayfix_noairborncorpse;
extern cvar_t sv_gameplayfix_setmodelrealbox;
extern cvar_t sv_gameplayfix_stepdown;
extern cvar_t sv_gameplayfix_stepwhilejumping;
extern cvar_t sv_gameplayfix_swiminbmodels;
extern cvar_t sv_gameplayfix_upwardvelocityclearsongroundflag;
extern cvar_t sv_gravity;
extern cvar_t sv_idealpitchscale;
extern cvar_t sv_jumpstep;
extern cvar_t sv_jumpvelocity;
extern cvar_t sv_maxairspeed;
extern cvar_t sv_maxrate;
extern cvar_t sv_maxspeed;
extern cvar_t sv_maxvelocity;
extern cvar_t sv_newflymove;
extern cvar_t sv_nostep;
extern cvar_t sv_playerphysicsqc;
extern cvar_t sv_progs;
extern cvar_t sv_protocolname;
extern cvar_t sv_random_seed;
extern cvar_t sv_ratelimitlocalplayer;
extern cvar_t sv_sound_land;
extern cvar_t sv_sound_watersplash;
extern cvar_t sv_stepheight;
extern cvar_t sv_stopspeed;
extern cvar_t sv_wallfriction;
extern cvar_t sv_wateraccelerate;
extern cvar_t sv_waterfriction;
extern cvar_t sys_ticrate;
extern cvar_t teamplay;
extern cvar_t temp1;
extern cvar_t timelimit;

extern mempool_t *sv_mempool;

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

extern client_t *host_client;

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

void SV_Init (void);

void SV_StartParticle (vec3_t org, vec3_t dir, int color, int count);
void SV_StartEffect (vec3_t org, int modelindex, int startframe, int framecount, int framerate);
void SV_StartSound (prvm_edict_t *entity, int channel, const char *sample, int volume, float attenuation);
void SV_StartPointSound (vec3_t origin, const char *sample, int volume, float attenuation);

void SV_ConnectClient (int clientnum, netconn_t *netconnection);
void SV_DropClient (qboolean crash);

void SV_SendClientMessages (void);

void SV_ReadClientMessage(void);

// precachemode values:
// 0 = fail if not precached,
// 1 = warn if not found and precache if possible
// 2 = precache
int SV_ModelIndex(const char *s, int precachemode);
int SV_SoundIndex(const char *s, int precachemode);

int SV_ParticleEffectIndex(const char *name);

void SV_SetIdealPitch (void);

void SV_AddUpdates (void);

void SV_ClientThink (void);

void SV_ClientPrint(const char *msg);
void SV_ClientPrintf(const char *fmt, ...) DP_FUNC_PRINTF(1);
void SV_BroadcastPrint(const char *msg);
void SV_BroadcastPrintf(const char *fmt, ...) DP_FUNC_PRINTF(1);

void SV_Physics (void);
void SV_Physics_ClientMove (void);
void SV_Physics_ClientEntity (prvm_edict_t *ent);

qboolean SV_PlayerCheckGround (prvm_edict_t *ent);
qboolean SV_CheckBottom (prvm_edict_t *ent);
qboolean SV_movestep (prvm_edict_t *ent, vec3_t move, qboolean relink, qboolean noenemy, qboolean settrace);

// Needs to be called any time an entity changes origin, mins, maxs, or solid
// sets ent->v.absmin and ent->v.absmax
// if touchtriggers, calls prog functions for the intersected triggers
void SV_LinkEdict (prvm_edict_t *ent, qboolean touch_triggers);

// move an entity that is stuck by small amounts in various directions to try to nudge it back into the collision hull
// returns true if it found a better place
qboolean SV_UnstickEntity (prvm_edict_t *ent);

// calculates hitsupercontentsmask for a generic qc entity
int SV_GenericHitSuperContentsMask(const prvm_edict_t *edict);
// traces a box move against worldmodel and all entities in the specified area
trace_t SV_Move(const vec3_t start, const vec3_t mins, const vec3_t maxs, const vec3_t end, int type, prvm_edict_t *passedict, int hitsupercontentsmask);

int SV_PointSuperContents(const vec3_t point);

void SV_FlushBroadcastMessages(void);
void SV_WriteClientdataToMessage (client_t *client, prvm_edict_t *ent, sizebuf_t *msg, int *stats);

void SV_MoveToGoal (void);

void SV_ApplyClientMove (void);
void SV_SaveSpawnparms (void);
void SV_SpawnServer (const char *server);

void SV_CheckVelocity (prvm_edict_t *ent);

void SV_SetupVM(void);

void SV_VM_Begin(void);
void SV_VM_End(void);

const char *Host_TimingReport(); // for output in Host_Status_f

#endif