/*
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
#include <unistd.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 = {"con_notifytime","3"};    //seconds

#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;
    

qboolean  con_initialized;

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;
      key_lines[edit_line][1] = 0;  // clear any typing
      key_linepos = 1;
    }
    else
    {
      M_Menu_Main_f ();
    }
  }
  else
    key_dest = key_console;
  
  SCR_EndLoadingPlaque ();
  memset (con_times, 0, sizeof(con_times));
}

/*
================
Con_Clear_f
================
*/
void Con_Clear_f (void)
{
  if (con_text)
    Q_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.width >> 3) - 2;

  if (width == con_linewidth)
    return;

  if (width < 1)      // video hasn't been initialized yet
  {
    width = 38;
    con_linewidth = width;
    con_totallines = CON_TEXTSIZE / con_linewidth;
    Q_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;

    Q_memcpy (tbuf, con_text, CON_TEXTSIZE);
    Q_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";

  con_debuglog = COM_CheckParm("-condebug");

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

  con_text = Hunk_AllocName (CON_TEXTSIZE, "context");
  Q_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++;
  Q_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
================
*/
#define MAXPRINTMSG 4096
// FIXME: make a buffer size safe vsprintf?
void Con_Printf (char *fmt, ...)
{
  va_list   argptr;
  char    msg[MAXPRINTMSG];
  static qboolean inupdate;
  
  va_start (argptr,fmt);
  vsprintf (msg,fmt,argptr);
  va_end (argptr);
  
// also echo to debugging console
  Sys_Printf ("%s", msg); // also echo to debugging console

// log all messages to file
  if (con_debuglog)
    Con_DebugLog(va("%s/qconsole.log",com_gamedir), "%s", msg);

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

// write it to the scrollable buffer
  Con_Print (msg);
  
// update the screen if the console is displayed
  if (cls.signon != SIGNONS && !scr_disabled_for_loading )
  {
  // protect against infinite loop if something in SCR_UpdateScreen calls
  // Con_Printd
    if (!inupdate)
    {
      inupdate = true;
      SCR_UpdateScreen ();
      inupdate = false;
    }
  }
}

/*
================
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.value)
    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];
  int     temp;
    
  va_start (argptr,fmt);
  vsprintf (msg,fmt,argptr);
  va_end (argptr);

  temp = scr_disabled_for_loading;
  scr_disabled_for_loading = true;
  Con_Printf ("%s", msg);
  scr_disabled_for_loading = temp;
}


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

DRAWING

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


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

The input line scrolls horizontally if typing goes beyond the right edge
================
*/
void Con_DrawInput (void)
{
  int   y;
  int   i;
  char  *text;

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

  text = key_lines[edit_line];
  
// add the cursor frame
  text[key_linepos] = 10+((int)(realtime*con_cursorspeed)&1);
  
// fill out remainder with spaces
  for (i=key_linepos+1 ; i< con_linewidth ; i++)
    text[i] = ' ';
    
//  prestep if horizontally scrolling
  if (key_linepos >= con_linewidth)
    text += 1 + key_linepos - con_linewidth;
    
// draw it
  y = con_vislines-16;

  for (i=0 ; i<con_linewidth ; i++)
    Draw_Character ( (i+1)<<3, con_vislines - 16, text[i]);

// 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[];

  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;
    scr_copytop = 1;

    for (x = 0 ; x < con_linewidth ; x++)
      Draw_Character ( (x+1)<<3, v, text[x]);

    v += 8;
  }


  if (key_dest == key_message)
  {
    clearnotify = 0;
    scr_copytop = 1;
  
    x = 0;
    
    Draw_String (8, v, "say:");
    while(chat_buffer[x])
    {
      Draw_Character ( (x+5)<<3, v, chat_buffer[x]);
      x++;
    }
    Draw_Character ( (x+5)<<3, v, 10+((int)(realtime*con_cursorspeed)&1));
    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
================
*/
void Con_DrawConsole (int lines, qboolean drawinput)
{
  int       i, x, y;
  int       rows;
  char      *text;
  int       j;
  
  if (lines <= 0)
    return;

// draw the background
  Draw_ConsoleBackground (lines);

// 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 = i - con_backscroll;
    if (j<0)
      j = 0;
    text = con_text + (j % con_totallines)*con_linewidth;

    for (x=0 ; x<con_linewidth ; x++)
      Draw_Character ( (x+1)<<3, y, text[x]);
  }

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


/*
==================
Con_NotifyBox
==================
*/
void Con_NotifyBox (char *text)
{
  double    t1, t2;

// during startup for sound / cd warnings
  Con_Printf("\n\n\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n");

  Con_Printf (text);

  Con_Printf ("Press a key.\n");
  Con_Printf("\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n");

  key_count = -2;   // wait for a key down and up
  key_dest = key_console;

  do
  {
    t1 = Sys_FloatTime ();
    SCR_UpdateScreen ();
    Sys_SendKeyEvents ();
    t2 = Sys_FloatTime ();
    realtime += t2-t1;    // make the cursor blink
  } while (key_count < 0);

  Con_Printf ("\n");
  key_dest = key_game;
  realtime = 0;       // put the cursor back to invisible
}