/*----------------------------------------------------------------------------
  ChucK Concurrent, On-the-fly Audio Programming Language
    Compiler and Virtual Machine

  Copyright (c) 2004 Ge Wang and Perry R. Cook.  All rights reserved.
    http://chuck.stanford.edu/
    http://chuck.cs.princeton.edu/

  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
  U.S.A.
-----------------------------------------------------------------------------*/

//-----------------------------------------------------------------------------
// file: util_console.cpp
// desc: utility for console I/O
//
// author: Spencer Salazar (spencer@ccrma.stanford.edu)
// date: Autumn 2005
//-----------------------------------------------------------------------------
#include "util_console.h"
#include "chuck_errmsg.h"
#include <stdio.h>
#ifdef __USE_READLINE__
 #include <readline/readline.h>
#else
 #include <stdlib.h>
 #define CONSOLE_INPUT_BUFFER_SIZE 255
#endif

char * io_readline( const char * prompt )
{
#ifdef __USE_READLINE__

    // call the real readline
    return readline( prompt );

#else

    // insert our hack
    char * buf=(char *)malloc( CONSOLE_INPUT_BUFFER_SIZE * sizeof(char) );
    char * result;
    
    fputs( prompt, stdout );
    
	result = fgets( buf, CONSOLE_INPUT_BUFFER_SIZE, stdin );
	
	if( result == NULL )
	{
		free( buf );
		return NULL;
	}
	
	for( int i=0; i < CONSOLE_INPUT_BUFFER_SIZE; i++ )
		if(buf[i] == '\n' )
		{
			buf[i] = 0;
			break;
		}
	
	return buf;
	
#endif
}

void io_addhistory( const char * addme )
{
#ifdef __USE_READLINE__
	
	add_history( addme );
	
#else
	
	//do nothing
	
#endif
}


// code thanks to Luke Lin (wdlin@CCCA.NCTU.edu.tw)
// kb hit
#ifndef __PLATFORM_WIN32__
  #include <string.h>
#ifdef __PLATFORM_MACOSX__
  #include <termios.h>
  static struct termios g_save;
#else
  #include <termio.h>
  static struct termio g_save;
#endif

  #include <unistd.h>
  #include <sys/ioctl.h>
#else
  #include <conio.h>
#endif


// global
static t_CKINT g_c;
static t_CKBOOL g_init;


// on entering mode
t_CKBOOL kb_initscr()
{
    if( g_init ) return FALSE;

#ifndef __PLATFORM_WIN32__

#ifdef __PLATFORM_MACOSX__
    struct termios term;
    if( ioctl( 0, TIOCGETA, &term ) == -1 )
#else
    struct termio term;
    if( ioctl( 0, TCGETA, &term ) == -1 )
#endif
    { 
        EM_log( CK_LOG_SEVERE, "(kbhit disabled): standard input not a tty!");
        return FALSE;
    }

    // log
    EM_log( CK_LOG_INFO, "starting kb hit immediate mode..." );

    g_save = term;
                
    term.c_lflag &= ~ICANON;
    term.c_lflag &= ~ECHO;

    term.c_cc[VMIN] = 0;
    term.c_cc[VTIME]=0;  

#ifdef __PLATFORM_MACOSX__
    ioctl( 0, TIOCSETA, &term );
#else
    ioctl( 0, TCSETA, &term );
#endif

#endif

    g_init = TRUE;
    return TRUE;
}


// on exit
void kb_endwin()
{
    if( !g_init ) return;

#ifndef __PLATFORM_WIN32__
#ifdef __PLATFORM_MACOSX__
    ioctl( 0, TIOCSETA, &g_save );
#else
    ioctl( 0, TCSETA, &g_save );
#endif
#endif

    g_init = FALSE;
}


// hit
t_CKINT kb_hit()
{
#ifndef __PLATFORM_WIN32__
    int ifkeyin;
    char c;
    ifkeyin = read( 0, &c, 1 );
    g_c = (t_CKINT)c;

    // log
    EM_log( CK_LOG_FINE, "kb hit! %i : %c", ifkeyin, c );

    return (ifkeyin);
#else
    return (t_CKINT)kbhit();
#endif
}


// get
t_CKINT kb_getch()
{
#ifndef __PLATFORM_WIN32__
    return g_c;
#else
    return (t_CKINT)::getch();
#endif
}


// ready
t_CKBOOL kb_ready()
{
    return g_init;
}