/*
menu_int.h - interface between engine and menu
Copyright (C) 2010 Uncle Mike

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 3 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.
*/

#ifndef MENU_INT_H
#define MENU_INT_H

#include "cvardef.h"
#include "gameinfo.h"
#include "wrect.h"
#include "net_api.h"

// a macro for mainui_cpp, indicating that mainui should be compiled for
// Xash3D 1.0 interface
#define NEW_ENGINE_INTERFACE

typedef int		HIMAGE;		// handle to a graphic

// flags for PIC_Load
#define PIC_NEAREST		(1<<0)		// disable texfilter
#define PIC_KEEP_SOURCE	(1<<1)		// some images keep source
#define PIC_NOFLIP_TGA	(1<<2)		// Steam background completely ignore tga attribute 0x20
#define PIC_EXPAND_SOURCE (1<<3)		// don't keep as 8-bit source, expand to RGBA

// flags for COM_ParseFileSafe
#define PFILE_IGNOREBRACKET (1<<0)
#define PFILE_HANDLECOLON   (1<<1)

typedef struct ui_globalvars_s
{
	float		time;		// unclamped host.realtime
	float		frametime;

	int		scrWidth;		// actual values
	int		scrHeight;

	int		maxClients;
	int		developer; // boolean, changed from allow_console to make mainui_cpp compile for both engines
	int		demoplayback;
	int		demorecording;
	char		demoname[64];	// name of currently playing demo
	char		maptitle[64];	// title of active map
} ui_globalvars_t;

struct ref_viewpass_s;

typedef struct ui_enginefuncs_s
{
	// image handlers
	HIMAGE	(*pfnPIC_Load)( const char *szPicName, const byte *ucRawImage, int ulRawImageSize, int flags );
	void	(*pfnPIC_Free)( const char *szPicName );
	int	(*pfnPIC_Width)( HIMAGE hPic );
	int	(*pfnPIC_Height)( HIMAGE hPic );
	void	(*pfnPIC_Set)( HIMAGE hPic, int r, int g, int b, int a );
	void	(*pfnPIC_Draw)( int x, int y, int width, int height, const wrect_t *prc );
	void	(*pfnPIC_DrawHoles)( int x, int y, int width, int height, const wrect_t *prc );
	void	(*pfnPIC_DrawTrans)( int x, int y, int width, int height, const wrect_t *prc );
	void	(*pfnPIC_DrawAdditive)( int x, int y, int width, int height, const wrect_t *prc );
	void	(*pfnPIC_EnableScissor)( int x, int y, int width, int height );
	void	(*pfnPIC_DisableScissor)( void );

	// screen handlers
	void	(*pfnFillRGBA)( int x, int y, int width, int height, int r, int g, int b, int a );

	// cvar handlers
	cvar_t*	(*pfnRegisterVariable)( const char *szName, const char *szValue, int flags );
	float	(*pfnGetCvarFloat)( const char *szName );
	const char*	(*pfnGetCvarString)( const char *szName ) PFN_RETURNS_NONNULL;
	void	(*pfnCvarSetString)( const char *szName, const char *szValue );
	void	(*pfnCvarSetValue)( const char *szName, float flValue );

	// command handlers
	int	(*pfnAddCommand)( const char *cmd_name, void (*function)(void) );
	void	(*pfnClientCmd)( int execute_now, const char *szCmdString );
	void	(*pfnDelCommand)( const char *cmd_name );
	int (*pfnCmdArgc)( void );
	const char*	(*pfnCmdArgv)( int argc ) PFN_RETURNS_NONNULL;
	const char*	(*pfnCmd_Args)( void ) PFN_RETURNS_NONNULL;

	// debug messages (in-menu shows only notify)
	void	(*Con_Printf)( const char *fmt, ... ) FORMAT_CHECK( 1 );
	void	(*Con_DPrintf)( const char *fmt, ... )  FORMAT_CHECK( 1 );
	void	(*Con_NPrintf)( int pos, const char *fmt, ... )  FORMAT_CHECK( 2 );
	void	(*Con_NXPrintf)( struct con_nprint_s *info, const char *fmt, ... ) FORMAT_CHECK( 2 );

	// sound handlers
	void	(*pfnPlayLocalSound)( const char *szSound );

	// cinematic handlers
	void	(*pfnDrawLogo)( const char *filename, float x, float y, float width, float height );
	int	(*pfnGetLogoWidth)( void );
	int	(*pfnGetLogoHeight)( void );
	float	(*pfnGetLogoLength)( void );	// cinematic duration in seconds

	// text message system
	void	(*pfnDrawCharacter)( int x, int y, int width, int height, int ch, int ulRGBA, HIMAGE hFont );
	int	(*pfnDrawConsoleString)( int x, int y, const char *string );
	void	(*pfnDrawSetTextColor)( int r, int g, int b, int alpha );
	void	(*pfnDrawConsoleStringLen)(  const char *string, int *length, int *height );
	void	(*pfnSetConsoleDefaultColor)( int r, int g, int b ); // color must came from colors.lst

	// custom rendering (for playermodel preview)
	struct cl_entity_s* (*pfnGetPlayerModel)( void );	// for drawing playermodel previews
	void	(*pfnSetModel)( struct cl_entity_s *ed, const char *path );
	void	(*pfnClearScene)( void );
	void	(*pfnRenderScene)( const struct ref_viewpass_s *rvp );
	int	(*CL_CreateVisibleEntity)( int type, struct cl_entity_s *ent );

	// misc handlers
	void	(*pfnHostError)( const char *szFmt, ... ) FORMAT_CHECK( 1 );
	int	(*pfnFileExists)( const char *filename, int gamedironly );
	void	(*pfnGetGameDir)( char *szGetGameDir );

	// gameinfo handlers
	int	(*pfnCreateMapsList)( int fRefresh );
	int	(*pfnClientInGame)( void );
	void	(*pfnClientJoin)( const struct netadr_s adr );

	// parse txt files
	byte*	(*COM_LoadFile)( const char *filename, int *pLength );
	char*	(*COM_ParseFile)( char *data, char *token );
	void	(*COM_FreeFile)( void *buffer );

	// keyfuncs
	void	(*pfnKeyClearStates)( void );				// call when menu open or close
	void	(*pfnSetKeyDest)( int dest );
	const char *(*pfnKeynumToString)( int keynum );
	const char *(*pfnKeyGetBinding)( int keynum );
	void	(*pfnKeySetBinding)( int keynum, const char *binding );
	int	(*pfnKeyIsDown)( int keynum );
	int	(*pfnKeyGetOverstrikeMode)( void );
	void	(*pfnKeySetOverstrikeMode)( int fActive );
	void	*(*pfnKeyGetState)( const char *name );			// for mlook, klook etc

	// engine memory manager
	void*	(*pfnMemAlloc)( size_t cb, const char *filename, const int fileline ) ALLOC_CHECK( 1 );
	void	(*pfnMemFree)( void *mem, const char *filename, const int fileline );

	// collect info from engine
	int	(*pfnGetGameInfo)( GAMEINFO *pgameinfo );
	GAMEINFO	**(*pfnGetGamesList)( int *numGames );			// collect info about all mods
	char 	**(*pfnGetFilesList)( const char *pattern, int *numFiles, int gamedironly );	// find in files
	int (*pfnGetSaveComment)( const char *savename, char *comment );
	int	(*pfnGetDemoComment)( const char *demoname, char *comment );
	int	(*pfnCheckGameDll)( void );				// returns false if hl.dll is missed or invalid
	char	*(*pfnGetClipboardData)( void );

	// engine launcher
	void	(*pfnShellExecute)( const char *name, const char *args, int closeEngine );
	void	(*pfnWriteServerConfig)( const char *name );
	void	(*pfnChangeInstance)( const char *newInstance, const char *szFinalMessage );
	void	(*pfnPlayBackgroundTrack)( const char *introName, const char *loopName );
	void	(*pfnHostEndGame)( const char *szFinalMessage );

	// menu interface is freezed at version 0.75
	// new functions starts here
	float	(*pfnRandomFloat)( float flLow, float flHigh );
	int		(*pfnRandomLong)( int lLow, int lHigh );

	void	(*pfnSetCursor)( void *hCursor );			// change cursor
	int	(*pfnIsMapValid)( char *filename );
	void	(*pfnProcessImage)( int texnum, float gamma, int topColor, int bottomColor );
	int	(*pfnCompareFileTime)( const char *filename1, const char *filename2, int *iCompare );

	const char *(*pfnGetModeString)( int vid_mode );
	int	(*COM_SaveFile)( const char *filename, const void *data, int len );
	int	(*COM_RemoveFile)( const char *filepath );
} ui_enginefuncs_t;

typedef struct
{
	int	(*pfnVidInit)( void );
	void	(*pfnInit)( void );
	void	(*pfnShutdown)( void );
	void	(*pfnRedraw)( float flTime );
	void	(*pfnKeyEvent)( int key, int down );
	void	(*pfnMouseMove)( int x, int y );
	void	(*pfnSetActiveMenu)( int active );
	void	(*pfnAddServerToList)( struct netadr_s adr, const char *info );
	void	(*pfnGetCursorPos)( int *pos_x, int *pos_y );
	void	(*pfnSetCursorPos)( int pos_x, int pos_y );
	void	(*pfnShowCursor)( int show );
	void	(*pfnCharEvent)( int key );
	int	(*pfnMouseInRect)( void );	// mouse entering\leave game window
	int	(*pfnIsVisible)( void );
	int	(*pfnCreditsActive)( void );	// unused
	void	(*pfnFinalCredits)( void );	// show credits + game end
} UI_FUNCTIONS;

#define MENU_EXTENDED_API_VERSION 1

typedef struct ui_extendedfuncs_s {
	// text functions, frozen
	void (*pfnEnableTextInput)( int enable );
	int (*pfnUtfProcessChar) ( int ch );
	int (*pfnUtfMoveLeft) ( char *str, int pos );
	int (*pfnUtfMoveRight) ( char *str, int pos, int length );

	// new engine extended api start here
	// returns 1 if there are more in list, otherwise 0
	int (*pfnGetRenderers)( unsigned int num, char *shortName, size_t size1, char *readableName, size_t size2 );
	double (*pfnDoubleTime)( void );
	char *(*pfnParseFile)( char *data, char *buf, const int size, unsigned int flags, int *len );

	// network address funcs
	const char *(*pfnAdrToString)( const struct netadr_s a ) PFN_RETURNS_NONNULL;
	int (*pfnCompareAdr)( const void *a, const void *b ); // netadr_t
	void *(*pfnGetNativeObject)( const char *name );
	struct net_api_s *pNetAPI;

	// new mods info
	gameinfo2_t *(*pfnGetGameInfo)( int gi_version ); // might return NULL if gi_version is unsupported
	gameinfo2_t *(*pfnGetModInfo)( int gi_version, int mod_index ); // continiously call it until it returns null

	// returns 1 if cvar has read-only flag
	// or -1 if cvar not found
	int (*pfnIsCvarReadOnly)( const char *name );
} ui_extendedfuncs_t;

// deprecated export from old engine
typedef void (*ADDTOUCHBUTTONTOLIST)( const char *name, const char *texture, const char *command, unsigned char *color, int flags );

typedef struct
{
	ADDTOUCHBUTTONTOLIST pfnAddTouchButtonToList;
	void (*pfnResetPing)( void );
	void (*pfnShowConnectionWarning)( void );
	void (*pfnShowUpdateDialog)( int preferStore );
	void (*pfnShowMessageBox)( const char *text );
	void (*pfnConnectionProgress_Disconnect)( void );
	void (*pfnConnectionProgress_Download)( const char *pszFileName, const char *pszServerName, int iCurrent, int iTotal, const char *comment );
	void (*pfnConnectionProgress_DownloadEnd)( void );
	void (*pfnConnectionProgress_Precache)( void );
	void (*pfnConnectionProgress_Connect)( const char *server ); // NULL for local server
	void (*pfnConnectionProgress_ChangeLevel)( void );
	void (*pfnConnectionProgress_ParseServerInfo)( const char *server );
} UI_EXTENDED_FUNCTIONS;

typedef int (*MENUAPI)( UI_FUNCTIONS *pFunctionTable, ui_enginefuncs_t* engfuncs, ui_globalvars_t *pGlobals );

typedef int (*UIEXTENEDEDAPI)( int version, UI_EXTENDED_FUNCTIONS *pFunctionTable, ui_extendedfuncs_t *engfuncs );

// deprecated interface from old engine
typedef int (*UITEXTAPI)( ui_extendedfuncs_t* engfuncs );

#define PLATFORM_UPDATE_PAGE "PlatformUpdatePage"
#define GENERIC_UPDATE_PAGE "GenericUpdatePage"

#endif//MENU_INT_H