//=======================================================================
//			Copyright XashXT Group 2009 ©
//		      client.h -- primary header for client
//=======================================================================

#ifndef CLIENT_H
#define CLIENT_H

#include "mathlib.h"
#include "cdll_int.h"
#include "gameui_api.h"
#include "cl_entity.h"
#include "com_model.h"
#include "cm_local.h"
#include "pm_defs.h"
#include "pm_movevars.h"
#include "protocol.h"
#include "netchan.h"
#include "world.h"

#define MAX_DEMOS		32
#define MAX_MOVIES		8

#define NUM_FOR_EDICT(e)	((int)((cl_entity_t *)(e) - clgame.entities))
#define EDICT_NUM( num )	CL_EDICT_NUM( num, __FILE__, __LINE__ )
#define cl_time()		( cl.time )
#define sv_time()		( cl.mtime[0] )

//=============================================================================
typedef struct frame_s
{
	// received from server
	double		receivedtime;	// time message was received, or -1
	double		latency;
	double		time;		// server timestamp

	clientdata_t	clientdata;	// message received that reflects performing
	weapon_data_t	weapondata[32];
	packet_entities_t	entities;

	bool		valid;		// cleared if delta parsing was invalid
} frame_t;

#define CMD_BACKUP		MULTIPLAYER_BACKUP	// allow a lot of command backups for very fast systems
#define CMD_MASK		(CMD_BACKUP - 1)

#define CL_UPDATE_MASK	(CL_UPDATE_BACKUP - 1)
extern int CL_UPDATE_BACKUP;

// the client_t structure is wiped completely at every
// server map change
typedef struct
{
	int		timeoutcount;

	int		servercount;		// server identification for prespawns
	int		validsequence;		// this is the sequence number of the last good
						// world snapshot/update we got.  If this is 0, we can't
						// render a frame yet
	int		parsecount;		// server message counter
	int		parsecountmod;		// modulo with network window
	double		parsecounttime;		// timestamp of parse
									
	bool		video_prepped;		// false if on new level or new ref dll
	bool		audio_prepped;		// false if on new level or new snd dll
	bool		force_refdef;		// vid has changed, so we can't use a paused refdef

	int		delta_sequence;		// acknowledged sequence number

	double		mtime[2];			// the timestamp of the last two messages


	int		last_incoming_sequence;

	bool		force_send_usercmd;

	frame_t		frame;			// received from server
	int		surpressCount;		// number of messages rate supressed
	frame_t		frames[MULTIPLAYER_BACKUP];	// alloced on svc_serverdata
	usercmd_t		cmds[MULTIPLAYER_BACKUP];	// each mesage will send several old cmds

	double		time;			// this is the time value that the client
						// is rendering at.  always <= cls.realtime
						// a lerp point for other data
	double		oldtime;			// previous cl.time, time-oldtime is used
						// to decay light values and smooth step ups

	int		render_flags;		// clearing at end of frame
	float		lerpFrac;			// interpolation value
	ref_params_t	refdef;			// shared refdef

	char		serverinfo[MAX_INFO_STRING];
	player_info_t	players[MAX_CLIENTS];
	event_state_t	events;

	// predicting stuff
	uint		random_seed;			// for predictable random values
	vec3_t		predicted_origins[CMD_BACKUP];	// for debug comparing against server
	vec3_t		predicted_origin;			// generated by CL_PredictMovement
	vec3_t		predicted_viewofs;
	vec3_t		predicted_angles;
	vec3_t		predicted_velocity;
	vec3_t		prediction_error;

	// server state information
	int		playernum;
	int		maxclients;
	int		movemessages;
	char		configstrings[MAX_CONFIGSTRINGS][CS_SIZE];

	model_t		*worldmodel;			// pointer to world

	// locally derived information from server state
	model_t		models[MAX_MODELS];
	sound_t		sound_precache[MAX_SOUNDS];
	shader_t		decal_shaders[MAX_DECALNAMES];
} client_t;

/*
==================================================================

the client_static_t structure is persistant through an arbitrary number
of server connections

==================================================================
*/
typedef enum
{
	ca_uninitialized = 0,
	ca_disconnected, 	// not talking to a server
	ca_connecting,	// sending request packets to the server
	ca_connected,	// netchan_t established, waiting for svc_serverdata
	ca_active,	// game views should be displayed
	ca_cinematic,	// playing a cinematic, not connected to a server
} connstate_t;

typedef enum
{
	key_console = 0,
	key_game,
	key_menu
} keydest_t;

typedef enum
{
	dl_none,
	dl_model,
	dl_sound,
	dl_generic,
} dltype_t;		// download type

typedef enum
{
	scrshot_inactive,
	scrshot_plaque,  	// levelshot
	scrshot_savegame,	// saveshot
	scrshot_demoshot,	// for demos preview
	scrshot_envshot,	// cubemap view
	scrshot_skyshot	// skybox view
} scrshot_t;

// client screen state
typedef enum
{
	CL_LOADING = 1,	// draw loading progress-bar
	CL_ACTIVE,	// draw normal hud
	CL_PAUSED,	// pause when active
	CL_CHANGELEVEL,	// draw 'loading' during changelevel
} scrstate_t;

typedef struct
{
	char		name[32];
	int		number;	// svc_ number
	int		size;	// if size == -1, size come from first byte after svcnum
	pfnUserMsgHook	func;	// user-defined function	
} cl_user_message_t;

typedef struct
{
	char		name[CS_SIZE];
	word		index;	// event index
	pfnEventHook	func;	// user-defined function
} user_event_t;

typedef struct
{
	HSPRITE		hFontTexture;		// handle to texture shader
	wrect_t		fontRc[256];		// rectangles
	bool		valid;			// rectangles are valid
} cl_font_t;

typedef struct
{
	// temp handle
	HSPRITE		hSprite;

	// scissor test
	int		scissor_x;
	int		scissor_y;
	int		scissor_width;
	int		scissor_height;
	bool		scissor_test;

	// holds text color
	rgba_t		textColor;

	// crosshair members
	HSPRITE		hCrosshair;
	wrect_t		rcCrosshair;
	rgba_t		rgbaCrosshair;
	byte		gammaTable[256];
} draw_stuff_t;

typedef struct
{
	// centerprint stuff
	int		lines;
	int		y, time;
	char		message[2048];
	int		totalWidth;
	int		totalHeight;
} center_print_t;

typedef struct
{
	void		*hInstance;		// pointer to client.dll
	HUD_FUNCTIONS	dllFuncs;			// dll exported funcs
	byte		*mempool;			// client edicts pool
	string		mapname;			// map name
	string		maptitle;			// display map title
	string		itemspath;		// path to items description for auto-complete func

	cl_entity_t	*entities;		// dynamically allocated entity array

	int		numEntities;		// actual ents count
	int		maxEntities;

	// movement values from server
	movevars_t	movevars;
	movevars_t	oldmovevars;
	playermove_t	*pmove;			// pmove state

	int		trace_hull;		// used by PM_SetTraceHull
	int		oldcount;			// used by PM_Push\Pop state

	vec3_t		player_mins[4];		// 4 hulls allowed
	vec3_t		player_maxs[4];		// 4 hulls allowed

	cl_user_message_t	msg[MAX_USER_MESSAGES];	// keep static to avoid fragment memory
	user_event_t	*events[MAX_EVENTS];

	draw_stuff_t	ds;			// draw2d stuff (hud, weaponmenu etc)
	center_print_t	centerPrint;		// centerprint variables
	SCREENINFO	scrInfo;			// actual screen info
	rgb_t		palette[256];		// Quake1 palette used for particle colors

	client_textmessage_t *titles;			// title messages, not network messages
	int		numTitles;

	cl_entity_t	viewent;			// viewmodel
} clgame_static_t;

typedef struct
{
	void		*hInstance;		// pointer to client.dll
	UI_FUNCTIONS	dllFuncs;			// dll exported funcs
	byte		*mempool;			// client edicts pool

	cl_entity_t	playermodel;		// uiPlayerSetup drawing model

	draw_stuff_t	ds;			// draw2d stuff (hud, weaponmenu etc)
	GAMEINFO		gameInfo;			// current gameInfo
	GAMEINFO		*modsInfo[MAX_MODS];	// simplified gameInfo for GameUI

	ui_globalvars_t	*globals;

	bool		drawLogo;			// set to TRUE if logo.avi missed or corrupted
	long		logo_xres;
	long		logo_yres;
} gameui_static_t;

typedef struct
{
	connstate_t	state;
	bool		initialized;
	bool		changelevel;		// during changelevel

	keydest_t		key_dest;

	byte		*mempool;			// client premamnent pool: edicts etc
	
	int		framecount;
	int		quakePort;		// a 16 bit value that allows quake servers
						// to work around address translating routers
	// connection information
	string		servername;		// name of server from original connect
	int		connect_time;		// for connection retransmits

	netchan_t		netchan;
	int		serverProtocol;		// in case we are doing some kind of version hack
	int		challenge;		// from the server to use for connecting

	float		packet_loss;
	double		packet_loss_recalc_time;

	float		nextcmdtime;		// when can we send the next command packet?                
	int		lastoutgoingcommand;	// sequence number of last outgoing command

	// internal shaders
	shader_t		fillShader;		// used for emulate FillRGBA to avoid wrong draw-sort
	shader_t		pauseIcon;		// draw 'paused' when game in-pause
	shader_t		loadingBar;		// 'loading' progress bar
	cl_font_t		creditsFont;		// shared creditsfont
	
	file_t		*download;		// file transfer from server
	string		downloadname;
	string		downloadtempname;
	int		downloadnumber;
	dltype_t		downloadtype;

	scrshot_t		scrshot_request;		// request for screen shot
	scrshot_t		scrshot_action;		// in-action
	const float	*envshot_vieworg;		// envshot position
	string		shotname;

	// demo loop control
	int		demonum;			// -1 = don't play demos
	string		demos[MAX_DEMOS];		// when not playing

	// movie playlist
	int		movienum;
	string		movies[MAX_MOVIES];

	// demo recording info must be here, so it isn't clearing on level change
	bool		demorecording;
	bool		demoplayback;
	bool		demowaiting;		// don't record until a non-delta message is received
	string		demoname;			// for demo looping

	file_t		*demofile;
} client_static_t;

extern client_t		cl;
extern client_static_t	cls;
extern clgame_static_t	clgame;
extern gameui_static_t	gameui;
extern render_exp_t		*re;

//
// cvars
//
extern cvar_t	*cl_predict;
extern cvar_t	*cl_smooth;
extern cvar_t	*cl_showfps;
extern cvar_t	*cl_envshot_size;
extern cvar_t	*cl_nodelta;
extern cvar_t	*cl_crosshair;
extern cvar_t	*cl_showmiss;
extern cvar_t	*cl_testlights;
extern cvar_t	*cl_solid_players;
extern cvar_t	*cl_idealpitchscale;
extern cvar_t	*cl_allow_levelshots;
extern cvar_t	*cl_levelshot_name;
extern cvar_t	*scr_centertime;
extern cvar_t	*scr_download;
extern cvar_t	*scr_loading;
extern cvar_t	*userinfo;

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

bool CL_CheckOrDownloadFile( const char *filename );
void CL_ParseConfigString( sizebuf_t *msg );
void CL_SetLightstyle( int i );
void CL_RunLightStyles( void );

void CL_AddEntities( void );
void CL_AddDLights( void );
void CL_AddLightStyles( void );

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

void CL_PrepVideo( void );
void CL_PrepSound( void );

//
// cl_cmds.c
//
void CL_Quit_f( void );
void CL_ScreenShot_f( void );
void CL_EnvShot_f( void );
void CL_SkyShot_f( void );
void CL_SaveShot_f( void );
void CL_DemoShot_f( void );
void CL_LevelShot_f( void );
void CL_SetSky_f( void );
void SCR_Viewpos_f( void );
void SCR_TimeRefresh_f( void );

//
// cl_main
//
void CL_Init( void );
void CL_SendCommand( void );
void CL_Disconnect_f( void );
void CL_GetChallengePacket( void );
void CL_PingServers_f( void );
void CL_RequestNextDownload( void );
void CL_ClearState( void );

//
// cl_demo.c
//
void CL_DrawDemoRecording( void );
void CL_WriteDemoMessage( sizebuf_t *msg, int head_size );
void CL_ReadDemoMessage( void );
void CL_StopPlayback( void );
void CL_StopRecord( void );
void CL_PlayDemo_f( void );
void CL_StartDemos_f( void );
void CL_Demos_f( void );
void CL_DeleteDemo_f( void );
void CL_Record_f( void );
void CL_Stop_f( void );

//
// cl_game.c
//
void CL_UnloadProgs( void );
bool CL_LoadProgs( const char *name );
void CL_ParseUserMessage( sizebuf_t *msg, int svc_num );
void CL_LinkUserMessage( char *pszName, const int svc_num, int iSize );
void CL_DrawHUD( int state );
void CL_InitEdicts( void );
void CL_FreeEdicts( void );
void CL_InitWorld( void );
void CL_InitEntity( cl_entity_t *pEdict );
void CL_FreeEntity( cl_entity_t *pEdict );
void CL_CenterPrint( const char *text, float y );
void CL_SetEventIndex( const char *szEvName, int ev_index );
void CL_TextMessageParse( byte *pMemFile, int fileSize );
int pfnDecalIndexFromName( const char *szDecalName );
void *VGui_GetPanel( void );
void VGui_ViewportPaintBackground( int extents[4] );

_inline cl_entity_t *CL_EDICT_NUM( int n, const char *file, const int line )
{
	if(( n >= 0 ) && ( n < clgame.maxEntities ))
		return clgame.entities + n;
	Host_Error( "CL_EDICT_NUM: bad number %i (called at %s:%i)\n", n, file, line );
	return NULL;	
}

//
// cl_parse.c
//
extern const char *svc_strings[256];
void CL_ParseServerMessage( sizebuf_t *msg );
void CL_RunBackgroundTrack( void );
void CL_Download_f( void );

//
// cl_scrn.c
//
void SCR_RegisterShaders( void );
void SCR_MakeScreenShot( void );
void SCR_MakeLevelShot( void );
void SCR_NetSpeeds( void );
void SCR_RSpeeds( void );
void SCR_DrawFPS( void );

//
// cl_view.c
//

void V_Init (void);
void V_Shutdown( void );
void V_ClearScene( void );
bool V_PreRender( void );
void V_PostRender( void );
void V_RenderView( void );

//
// cl_pmove.c
//
void CL_SetSolidEntities( void );
void CL_SetSolidPlayers( int playernum );
void CL_InitClientMove( void );
void CL_PredictMovement( void );
void CL_CheckPredictionError( void );
bool CL_IsPredicted( void );

//
// cl_frame.c
//
void CL_ParsePacketEntities( sizebuf_t *msg, bool delta );
void CL_UpdateStudioVars( cl_entity_t *ent, entity_state_t *newstate );
bool CL_GetEntitySpatialization( int ent, vec3_t origin, vec3_t velocity );
void CL_ClearFrames( void );

//
// cl_tent.c
//
int CL_AddEntity( int entityType, cl_entity_t *pEnt, shader_t customShader );
void CL_WeaponAnim( int iAnim, int body );
void CL_ClearEffects( void );
void CL_TestLights( void );
struct dlight_s *CL_AllocDlight( int key );
struct dlight_s *CL_AllocElight( int key );
void CL_LightForPoint( const vec3_t point, vec3_t ambientLight );
void CL_DecalShoot( HSPRITE hDecal, int entityIndex, int modelIndex, float *pos, int flags );
void CL_PlayerDecal( HSPRITE hDecal, int entityIndex, float *pos, byte *color );
void CL_QueueEvent( int flags, int index, float delay, event_args_t *args );
void CL_PlaybackEvent( int flags, const cl_entity_t *pInvoker, word eventindex, float delay, float *origin,
	float *angles, float fparam1, float fparam2, int iparam1, int iparam2, int bparam1, int bparam2 );
word CL_PrecacheEvent( const char *name );
void CL_ResetEvent( event_info_t *ei );
void CL_FireEvents( void );

//
// console.c
//
bool Con_Visible( void );
void Con_Init( void );
void Con_VidInit( void );
void Con_ToggleConsole_f( void );
void Con_ClearNotify( void );
void Con_RunConsole( void );
void Con_DrawConsole( void );
void Con_DrawStringLen( const char *pText, int *length, int *height );
int Con_DrawString( int x, int y, const char *string, rgba_t setColor );
void Con_DefaultColor( int r, int g, int b );
void Con_CharEvent( int key );
void Key_Console( int key );
void Con_Close( void );

//
// cl_menu.c
//
void UI_UnloadProgs( void );
bool UI_LoadProgs( const char *name );
void UI_UpdateMenu( float realtime );
void UI_KeyEvent( int key, bool down );
void UI_MouseMove( int x, int y );
void UI_SetActiveMenu( bool fActive );
void UI_AddServerToList( netadr_t adr, const char *info );
void UI_GetCursorPos( int *pos_x, int *pos_y );
void UI_SetCursorPos( int pos_x, int pos_y );
void UI_ShowCursor( bool show );
bool UI_CreditsActive( void );
void UI_CharEvent( int key );
bool UI_MouseInRect( void );
bool UI_IsVisible( void );

//
// cl_video.c
//
void SCR_InitCinematic( void );
void SCR_FreeCinematic( void );
bool SCR_PlayCinematic( const char *name );
bool SCR_DrawCinematic( void );
void SCR_RunCinematic( void );
void SCR_StopCinematic( void );
void CL_PlayVideo_f( void );

//
// cl_world.c
//
extern areanode_t	cl_areanodes[];

void CL_ClearWorld( void );
void CL_UnlinkEdict( cl_entity_t *ent );
void CL_LinkEdict( cl_entity_t *ent );
int CL_AreaEdicts( const vec3_t mins, const vec3_t maxs, cl_entity_t **list, int maxcount, int areatype );
int CL_TruePointContents( const vec3_t p );
int CL_PointContents( const vec3_t p );

#endif//CLIENT_H