/*
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.

*/
// console.c

#ifdef NeXT
#include <libc.h>
#endif
#ifndef _MSC_VER
#ifndef __BORLANDC__
#include <unistd.h>
#endif
#endif
#ifdef WIN32
#include <io.h>
#endif
#include <fcntl.h>
#include "quakedef.h"

int 		con_linewidth;

float		con_cursorspeed = 4;

#define		CON_TEXTSIZE	16384

qboolean 	con_forcedup;		// because no entities to refresh

int			con_totallines;		// total lines in console scrollback
int			con_backscroll;		// lines up from bottom to display
int			con_current;		// where next message will be printed
int			con_x;				// offset in current line for next print
char		*con_text = 0;

cvar_t		con_notifytime = {CVAR_SAVE, "con_notifytime","3"};	//seconds
cvar_t		logfile = {0, "logfile","0"};

#define	NUM_CON_TIMES 4
float		con_times[NUM_CON_TIMES];	// realtime time the line was generated
						// for transparent notify lines

int			con_vislines;

qboolean	con_debuglog;

#define	MAXCMDLINE	256
extern	char	key_lines[32][MAXCMDLINE];
extern	int		edit_line;
extern	int		key_linepos;
extern	int		key_insert;


qboolean	con_initialized;

mempool_t	*console_mempool;

int		con_notifylines;		// scan lines to clear for notify lines

extern void M_Menu_Main_f (void);

/*
================
Con_ToggleConsole_f
================
*/
void Con_ToggleConsole_f (void)
{
	if (key_dest == key_console)
	{
		if (cls.state == ca_connected)
			key_dest = key_game;
		else
			M_Menu_Main_f ();
	}
	else
		key_dest = key_console;

	memset (con_times, 0, sizeof(con_times));
}

/*
================
Con_Clear_f
================
*/
void Con_Clear_f (void)
{
	if (con_text)
		memset (con_text, ' ', CON_TEXTSIZE);
}


/*
================
Con_ClearNotify
================
*/
void Con_ClearNotify (void)
{
	int		i;

	for (i=0 ; i<NUM_CON_TIMES ; i++)
		con_times[i] = 0;
}


/*
================
Con_MessageMode_f
================
*/
extern qboolean team_message;

void Con_MessageMode_f (void)
{
	key_dest = key_message;
	team_message = false;
}


/*
================
Con_MessageMode2_f
================
*/
void Con_MessageMode2_f (void)
{
	key_dest = key_message;
	team_message = true;
}


/*
================
Con_CheckResize

If the line width has changed, reformat the buffer.
================
*/
void Con_CheckResize (void)
{
	int		i, j, width, oldwidth, oldtotallines, numlines, numchars;
	char	tbuf[CON_TEXTSIZE];

	width = (vid.conwidth >> 3) - 2;

	if (width == con_linewidth)
		return;

	if (width < 1)			// video hasn't been initialized yet
	{
		width = 78; // LordHavoc: changed from 38 to 78 (320 -> 640 conversion)
		con_linewidth = width;
		con_totallines = CON_TEXTSIZE / con_linewidth;
		memset (con_text, ' ', CON_TEXTSIZE);
	}
	else
	{
		oldwidth = con_linewidth;
		con_linewidth = width;
		oldtotallines = con_totallines;
		con_totallines = CON_TEXTSIZE / con_linewidth;
		numlines = oldtotallines;

		if (con_totallines < numlines)
			numlines = con_totallines;

		numchars = oldwidth;

		if (con_linewidth < numchars)
			numchars = con_linewidth;

		memcpy (tbuf, con_text, CON_TEXTSIZE);
		memset (con_text, ' ', CON_TEXTSIZE);

		for (i=0 ; i<numlines ; i++)
		{
			for (j=0 ; j<numchars ; j++)
			{
				con_text[(con_totallines - 1 - i) * con_linewidth + j] =
						tbuf[((con_current - i + oldtotallines) %
							  oldtotallines) * oldwidth + j];
			}
		}

		Con_ClearNotify ();
	}

	con_backscroll = 0;
	con_current = con_totallines - 1;
}


/*
================
Con_Init
================
*/
void Con_Init (void)
{
#define MAXGAMEDIRLEN	1000
	char	temp[MAXGAMEDIRLEN+1];
	char	*t2 = "/qconsole.log";

	Cvar_RegisterVariable(&logfile);
	con_debuglog = COM_CheckParm("-condebug");

	if (con_debuglog)
	{
		if (strlen (com_gamedir) < (MAXGAMEDIRLEN - strlen (t2)))
		{
			sprintf (temp, "%s%s", com_gamedir, t2);
			unlink (temp);
		}
		logfile.integer = 1;
	}

	console_mempool = Mem_AllocPool("console");
	con_text = Mem_Alloc(console_mempool, CON_TEXTSIZE);
	memset (con_text, ' ', CON_TEXTSIZE);
	con_linewidth = -1;
	Con_CheckResize ();

	Con_Printf ("Console initialized.\n");

//
// register our commands
//
	Cvar_RegisterVariable (&con_notifytime);

	Cmd_AddCommand ("toggleconsole", Con_ToggleConsole_f);
	Cmd_AddCommand ("messagemode", Con_MessageMode_f);
	Cmd_AddCommand ("messagemode2", Con_MessageMode2_f);
	Cmd_AddCommand ("clear", Con_Clear_f);
	con_initialized = true;
}


/*
===============
Con_Linefeed
===============
*/
void Con_Linefeed (void)
{
	con_x = 0;
	con_current++;
	memset (&con_text[(con_current%con_totallines)*con_linewidth]
	, ' ', con_linewidth);
}

/*
================
Con_Print

Handles cursor positioning, line wrapping, etc
All console printing must go through this in order to be logged to disk
If no console is visible, the notify window will pop up.
================
*/
void Con_Print (char *txt)
{
	int		y;
	int		c, l;
	static int	cr;
	int		mask;

	con_backscroll = 0;

	if (txt[0] == 1)
	{
		mask = 128;		// go to colored text
		S_LocalSound ("misc/talk.wav");
	// play talk wav
		txt++;
	}
	else if (txt[0] == 2)
	{
		mask = 128;		// go to colored text
		txt++;
	}
	else
		mask = 0;


	while ( (c = *txt) )
	{
	// count word length
		for (l=0 ; l< con_linewidth ; l++)
			if ( txt[l] <= ' ')
				break;

	// word wrap
		if (l != con_linewidth && (con_x + l > con_linewidth) )
			con_x = 0;

		txt++;

		if (cr)
		{
			con_current--;
			cr = false;
		}


		if (!con_x)
		{
			Con_Linefeed ();
		// mark time for transparent overlay
			if (con_current >= 0)
				con_times[con_current % NUM_CON_TIMES] = realtime;
		}

		switch (c)
		{
		case '\n':
			con_x = 0;
			break;

		case '\r':
			con_x = 0;
			cr = 1;
			break;

		default:	// display character and advance
			y = con_current % con_totallines;
			con_text[y*con_linewidth+con_x] = c | mask;
			con_x++;
			if (con_x >= con_linewidth)
				con_x = 0;
			break;
		}

	}
}


/*
================
Con_DebugLog
================
*/
void Con_DebugLog(char *file, char *fmt, ...)
{
    va_list argptr;
    static char data[1024];
    int fd;

    va_start(argptr, fmt);
    vsprintf(data, fmt, argptr);
    va_end(argptr);
    fd = open(file, O_WRONLY | O_CREAT | O_APPEND, 0666);
    write(fd, data, strlen(data));
    close(fd);
}


/*
================
Con_Printf

Handles cursor positioning, line wrapping, etc
================
*/
// LordHavoc: increased from 4096 to 16384
#define	MAXPRINTMSG	16384
// FIXME: make a buffer size safe vsprintf?
void Con_Printf (char *fmt, ...)
{
	va_list		argptr;
	char		msg[MAXPRINTMSG];

	va_start (argptr,fmt);
	vsprintf (msg,fmt,argptr);
	va_end (argptr);

// also echo to debugging console
	Sys_Printf ("%s", msg);

// log all messages to file
	if (con_debuglog)
	{
		// can't use va() here because it might overwrite other important things
		char logname[MAX_OSPATH];
		sprintf(logname, "%s/qconsole.log", com_gamedir);
		Con_DebugLog(logname, "%s", msg);
	}

	if (!con_initialized)
		return;

	if (cls.state == ca_dedicated)
		return;		// no graphics mode

// write it to the scrollable buffer
	Con_Print (msg);
}

/*
================
Con_DPrintf

A Con_Printf that only shows up if the "developer" cvar is set
================
*/
void Con_DPrintf (char *fmt, ...)
{
	va_list		argptr;
	char		msg[MAXPRINTMSG];

	if (!developer.integer)
		return;			// don't confuse non-developers with techie stuff...

	va_start (argptr,fmt);
	vsprintf (msg,fmt,argptr);
	va_end (argptr);

	Con_Printf ("%s", msg);
}


/*
==================
Con_SafePrintf

Okay to call even when the screen can't be updated
==================
*/
void Con_SafePrintf (char *fmt, ...)
{
	va_list		argptr;
	char		msg[1024];

	va_start (argptr,fmt);
	vsprintf (msg,fmt,argptr);
	va_end (argptr);

	Con_Printf ("%s", msg);
}


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

DRAWING

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


/*
================
Con_DrawInput

The input line scrolls horizontally if typing goes beyond the right edge

Modified by EvilTypeGuy eviltypeguy@qeradiant.com
================
*/
void Con_DrawInput (void)
{
	char editlinecopy[256], *text;

	if (key_dest != key_console && !con_forcedup)
		return;		// don't draw anything

	text = strcpy(editlinecopy, key_lines[edit_line]);

	// Advanced Console Editing by Radix radix@planetquake.com
	// Added/Modified by EvilTypeGuy eviltypeguy@qeradiant.com
	// use strlen of edit_line instead of key_linepos to allow editing
	// of early characters w/o erasing

	// add the cursor frame
	if ((int)(realtime*con_cursorspeed) & 1)		// cursor is visible
		text[key_linepos] = 11 + 130 * key_insert;	// either solid or triangle facing right

	text[key_linepos + 1] = 0;

	// prestep if horizontally scrolling
	if (key_linepos >= con_linewidth)
		text += 1 + key_linepos - con_linewidth;

	// draw it
	DrawQ_String(8, con_vislines - 16, text, con_linewidth, 8, 8, 1, 1, 1, 1, 0);

	// remove cursor
	key_lines[edit_line][key_linepos] = 0;
}


/*
================
Con_DrawNotify

Draws the last few lines of output transparently over the game top
================
*/
void Con_DrawNotify (void)
{
	int		x, v;
	char	*text;
	int		i;
	float	time;
	extern char chat_buffer[];
	char	temptext[256];

	v = 0;
	for (i= con_current-NUM_CON_TIMES+1 ; i<=con_current ; i++)
	{
		if (i < 0)
			continue;
		time = con_times[i % NUM_CON_TIMES];
		if (time == 0)
			continue;
		time = realtime - time;
		if (time > con_notifytime.value)
			continue;
		text = con_text + (i % con_totallines)*con_linewidth;

		clearnotify = 0;

		DrawQ_String(8, v, text, con_linewidth, 8, 8, 1, 1, 1, 1, 0);

		v += 8;
	}


	if (key_dest == key_message)
	{
		clearnotify = 0;

		x = 0;

		// LordHavoc: speedup, and other improvements
		if (team_message)
			sprintf(temptext, "say_team:%s%c", chat_buffer, (int) 10+((int)(realtime*con_cursorspeed)&1));
		else
			sprintf(temptext, "say:%s%c", chat_buffer, (int) 10+((int)(realtime*con_cursorspeed)&1));
		while (strlen(temptext) >= con_linewidth)
		{
			DrawQ_String (8, v, temptext, con_linewidth, 8, 8, 1, 1, 1, 1, 0);
			strcpy(temptext, &temptext[con_linewidth]);
			v += 8;
		}
		if (strlen(temptext) > 0)
		{
			DrawQ_String (8, v, temptext, 0, 8, 8, 1, 1, 1, 1, 0);
			v += 8;
		}
	}

	if (v > con_notifylines)
		con_notifylines = v;
}

/*
================
Con_DrawConsole

Draws the console with the solid background
The typing input line at the bottom should only be drawn if typing is allowed
================
*/
extern cvar_t scr_conalpha;
extern char engineversion[40];
void Con_DrawConsole (int lines)
{
	int				i, y;
	int				rows;
	char			*text;
	int				j;

	if (lines <= 0)
		return;

// draw the background
	DrawQ_Pic(0, lines - vid.conheight, "gfx/conback", vid.conwidth, vid.conheight, 1, 1, 1, scr_conalpha.value * lines / vid.conheight, 0);
	DrawQ_String(vid.conwidth - strlen(engineversion) * 8 - 8, lines - 8, engineversion, 0, 8, 8, 1, 0, 0, 1, 0);

// draw the text
	con_vislines = lines;

	rows = (lines-16)>>3;		// rows of text to draw
	y = lines - 16 - (rows<<3);	// may start slightly negative

	for (i = con_current - rows + 1;i <= con_current;i++, y += 8)
	{
		j = max(i - con_backscroll, 0);
		text = con_text + (j % con_totallines)*con_linewidth;

		DrawQ_String(8, y, text, con_linewidth, 8, 8, 1, 1, 1, 1, 0);
	}

// draw the input prompt, user text, and cursor if desired
	Con_DrawInput ();
}

/*
	Con_DisplayList

	New function for tab-completion system
	Added by EvilTypeGuy
	MEGA Thanks to Taniwha

*/
void
Con_DisplayList(char **list)
{
	int	i = 0;
	int	pos = 0;
	int	len = 0;
	int	maxlen = 0;
	int	width = (con_linewidth - 4);
	char	**walk = list;

	while (*walk) {
		len = strlen(*walk);
		if (len > maxlen)
			maxlen = len;
		walk++;
	}
	maxlen += 1;

	while (*list) {
		len = strlen(*list);
		if (pos + maxlen >= width) {
			Con_Printf("\n");
			pos = 0;
		}

		Con_Printf("%s", *list);
		for (i = 0; i < (maxlen - len); i++)
			Con_Printf(" ");

		pos += maxlen;
		list++;
	}

	if (pos)
		Con_Printf("\n\n");
}

/*
	Con_CompleteCommandLine

	New function for tab-completion system
	Added by EvilTypeGuy
	Thanks to Fett erich@heintz.com
	Thanks to taniwha

*/
void
Con_CompleteCommandLine (void)
{
	char	*cmd = "";
	char	*s;
	int		c, v, a, i;
	int		cmd_len;
	char	**list[3] = {0, 0, 0};

	s = key_lines[edit_line] + 1;
	// Count number of possible matches
	c = Cmd_CompleteCountPossible(s);
	v = Cvar_CompleteCountPossible(s);
	a = Cmd_CompleteAliasCountPossible(s);

	if (!(c + v + a))	// No possible matches
		return;

	if (c + v + a == 1) {
		if (c)
			list[0] = Cmd_CompleteBuildList(s);
		else if (v)
			list[0] = Cvar_CompleteBuildList(s);
		else
			list[0] = Cmd_CompleteAliasBuildList(s);
		cmd = *list[0];
		cmd_len = strlen (cmd);
	} else {
		if (c)
			cmd = *(list[0] = Cmd_CompleteBuildList(s));
		if (v)
			cmd = *(list[1] = Cvar_CompleteBuildList(s));
		if (a)
			cmd = *(list[2] = Cmd_CompleteAliasBuildList(s));

		cmd_len = strlen (s);
		do {
			for (i = 0; i < 3; i++) {
				char ch = cmd[cmd_len];
				char **l = list[i];
				if (l) {
					while (*l && (*l)[cmd_len] == ch)
						l++;
					if (*l)
						break;
				}
			}
			if (i == 3)
				cmd_len++;
		} while (i == 3);
		// 'quakebar'
		Con_Printf("\n\35");
		for (i = 0; i < con_linewidth - 4; i++)
			Con_Printf("\36");
		Con_Printf("\37\n");

		// Print Possible Commands
		if (c) {
			Con_Printf("%i possible command%s\n", c, (c > 1) ? "s: " : ":");
			Con_DisplayList(list[0]);
		}

		if (v) {
			Con_Printf("%i possible variable%s\n", v, (v > 1) ? "s: " : ":");
			Con_DisplayList(list[1]);
		}

		if (a) {
			Con_Printf("%i possible aliases%s\n", a, (a > 1) ? "s: " : ":");
			Con_DisplayList(list[2]);
		}
	}

	if (cmd) {
		strncpy(key_lines[edit_line] + 1, cmd, cmd_len);
		key_linepos = cmd_len + 1;
		if (c + v + a == 1) {
			key_lines[edit_line][key_linepos] = ' ';
			key_linepos++;
		}
		key_lines[edit_line][key_linepos] = 0;
	}
	for (i = 0; i < 3; i++)
		if (list[i])
			Mem_Free(list[i]);
}