/* files.c - Transscription, recording and playback
*		Copyright (c) 1995-1997 Stefan Jokisch
*
* This file is part of Frotz.
*
* Frotz 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.
*
* Frotz 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
*/

#include "frotz.h"
#include "glk.h"
#include "glkio.h"

extern void set_more_prompts (bool);

extern bool is_terminator (zchar);

extern bool read_yes_or_no (const char *);

static int script_width = 0;

static FILE *sfp = NULL;
static FILE *rfp = NULL;
static FILE *pfp = NULL;

/*
 * script_open
 *
 * Open the transscript file. 'AMFV' makes this more complicated as it
 * turns transscription on/off several times to exclude some text from
 * the transscription file. This wasn't a problem for the original V4
 * interpreters which always sent transscription to the printer, but it
 * means a problem to modern interpreters that offer to open a new file
 * every time transscription is turned on. Our solution is to append to
 * the old transscription file in V1 to V4, and to ask for a new file
 * name in V5+.
 *
 * Alas, we cannot do this, since glk cannot give us the filename
 * to reopen it again, and I dont want to mess with filerefs here.
 *
 */

void script_open (void)
{
    static bool script_valid = FALSE;
    
    h_flags &= ~SCRIPTING_FLAG;
    
#if 0
    if (h_version >= V5 || !script_valid) {
	if (!os_read_file_name (new_name, script_name, FILE_SCRIPT))
	    goto done;
    }
    
    /* Opening in "at" mode doesn't work for script_erase_input... */
    
    if ((sfp = fopen (sfp = fopen (script_name, "r+t")) != NULL || (sfp = fopen (script_name, "w+t")) != NULL) {
	
#endif
	
	if (h_version >= V5 || !script_valid)
	{
	    if ((sfp = frotzopenprompt(FILE_SCRIPT)) != NULL)
	    {
		fseek (sfp, 0, SEEK_END);
		
		h_flags |= SCRIPTING_FLAG;
		
		script_valid = TRUE;
		ostream_script = TRUE;
		
		script_width = 0;
		
	    } else print_string ("Cannot open file\n");
	}
	
	/* done: */
	
	SET_WORD (H_FLAGS, h_flags)
	
    }/* script_open */

/*
 * script_close
 *
 * Stop transscription.
 *
 */

void script_close (void)
{
    
    h_flags &= ~SCRIPTING_FLAG;
    SET_WORD (H_FLAGS, h_flags)
	
	fclose (sfp); ostream_script = FALSE;
	
}/* script_close */

/*
 * script_new_line
 *
 * Write a newline to the transscript file.
 *
 */

void script_new_line (void)
{
    
    if (fputc ('\n', sfp) == EOF)
	script_close ();
    
    script_width = 0;
    
}/* script_new_line */

/*
 * script_char
 *
 * Write a single character to the transscript file.
 *
 */

void script_char (zchar c)
{
    if (c == ZC_INDENT && script_width != 0)
	c = ' ';
    
    if (c == ZC_INDENT)
    { script_char (' '); script_char (' '); script_char (' '); return; }
    if (c == ZC_GAP)
    { script_char (' '); script_char (' '); return; }
    
    fputc (c, sfp); script_width++;
    
}/* script_char */

/*
 * script_word
 *
 * Write a string to the transscript file.
 *
 */

void script_word (const zchar *s)
{
    int width;
    int i;
    
    if (*s == ZC_INDENT && script_width != 0)
	script_char (*s++);
    
    for (i = 0, width = 0; s[i] != 0; i++)
	
	if (s[i] == ZC_NEW_STYLE || s[i] == ZC_NEW_FONT)
	    i++;
	else if (s[i] == ZC_GAP)
	    width += 3;
	else if (s[i] == ZC_INDENT)
	    width += 2;
	else
	    width += 1;
    
    if (f_setup.script_cols != 0 && script_width + width > f_setup.script_cols) {
	
	if (*s == ' ' || *s == ZC_INDENT || *s == ZC_GAP)
	    s++;
	
	script_new_line ();
	
    }
    
    for (i = 0; s[i] != 0; i++)
	
	if (s[i] == ZC_NEW_FONT || s[i] == ZC_NEW_STYLE)
	    i++;
	else
	    script_char (s[i]);
    
}/* script_word */

/*
 * script_write_input
 *
 * Send an input line to the transscript file.
 *
 */

void script_write_input (const zchar *buf, zchar key)
{
    int width;
    int i;
    
    for (i = 0, width = 0; buf[i] != 0; i++)
	width++;
    
    if (f_setup.script_cols != 0 && script_width + width > f_setup.script_cols)
	script_new_line ();
    
    for (i = 0; buf[i] != 0; i++)
	script_char (buf[i]);
    
    if (key == ZC_RETURN)
	script_new_line ();
    
}/* script_write_input */

/*
 * script_erase_input
 *
 * Remove an input line from the transscript file.
 *
 */

void script_erase_input (const zchar *buf)
{
    int width;
    int i;
    
    for (i = 0, width = 0; buf[i] != 0; i++)
	width++;
    
    fseek (sfp, -width, SEEK_CUR); script_width -= width;
    
}/* script_erase_input */

/*
 * script_mssg_on
 *
 * Start sending a "debugging" message to the transscript file.
 *
 */

void script_mssg_on (void)
{
    
    if (script_width != 0)
	script_new_line ();
    
    script_char (ZC_INDENT);
    
}/* script_mssg_on */

/*
 * script_mssg_off
 *
 * Stop writing a "debugging" message.
 *
 */

void script_mssg_off (void)
{
    
    script_new_line ();
    
}/* script_mssg_off */

/*
 * record_open
 *
 * Open a file to record the player's input.
 *
 */

void record_open (void)
{
    if ((rfp = frotzopenprompt(FILE_RECORD)) != NULL)
	ostream_record = TRUE;
    else
	print_string ("Cannot open file\n");
}

/*
 * record_close
 *
 * Stop recording the player's input.
 *
 */

void record_close (void)
{
    
    fclose (rfp); ostream_record = FALSE;
    
}/* record_close */

/*
 * record_code
 *
 * Helper function for record_char.
 *
 */

static void record_code (int c, bool force_encoding)
{
    
    if (force_encoding || c == '[' || c < 0x20 || c > 0x7e) {
	
	int i;
	
	fputc ('[', rfp);
	
	for (i = 10000; i != 0; i /= 10)
	    if (c >= i || i == 1)
		fputc ('0' + (c / i) % 10, rfp);
	
	fputc (']', rfp);
	
    } else fputc (c, rfp);
    
}/* record_code */

/*
 * record_char
 *
 * Write a character to the command file.
 *
 */

static void record_char (zchar c)
{
    
    if (c != ZC_RETURN) {
	if (c < ZC_HKEY_MIN || c > ZC_HKEY_MAX) {
	    record_code (translate_to_zscii (c), FALSE);
	    if (c == ZC_SINGLE_CLICK || c == ZC_DOUBLE_CLICK) {
		record_code (mouse_x, TRUE);
		record_code (mouse_y, TRUE);
	    }
	} else record_code (1000 + c - ZC_HKEY_MIN, TRUE);
    }
    
}/* record_char */

/*
 * record_write_key
 *
 * Copy a keystroke to the command file.
 *
 */

void record_write_key (zchar key)
{
    
    record_char (key);
    
    if (fputc ('\n', rfp) == EOF)
	record_close ();
    
}/* record_write_key */

/*
 * record_write_input
 *
 * Copy a line of input to a command file.
 *
 */

void record_write_input (const zchar *buf, zchar key)
{
    zchar c;
    
    while ((c = *buf++) != 0)
	record_char (c);
    
    record_char (key);
    
    if (fputc ('\n', rfp) == EOF)
	record_close ();
    
}/* record_write_input */

/*
 * replay_open
 *
 * Open a file of commands for playback.
 *
 */

void replay_open (void)
{
    if ((pfp = frotzopenprompt(FILE_PLAYBACK)) != NULL)
	istream_replay = TRUE;
    else
	print_string ("Cannot open file\n");
}

/*
 * replay_close
 *
 * Stop playback of commands.
 *
 */

void replay_close (void)
{
    fclose (pfp); istream_replay = FALSE;
}

/*
 * replay_code
 *
 * Helper function for replay_key and replay_line.
 *
 */

static int replay_code (void)
{
    int c;
    
    if ((c = fgetc (pfp)) == '[') {
	
	int c2;
	
	c = 0;
	
	while ((c2 = fgetc (pfp)) != EOF && c2 >= '0' && c2 <= '9')
	    c = 10 * c + c2 - '0';
	
	return (c2 == ']') ? c : EOF;
	
    } else return c;
    
}/* replay_code */

/*
 * replay_char
 *
 * Read a character from the command file.
 *
 */

static zchar replay_char (void)
{
    int c;
    
    if ((c = replay_code ()) != EOF) {
	
	if (c != '\n') {
	    
	    if (c < 1000) {
		
		c = translate_from_zscii (c);
		
		if (c == ZC_SINGLE_CLICK || c == ZC_DOUBLE_CLICK) {
		    mouse_x = replay_code ();
		    mouse_y = replay_code ();
		}
		
		return c;
		
	    } else return ZC_HKEY_MIN + c - 1000;
	}
	
	ungetc ('\n', pfp);
	
	return ZC_RETURN;
	
    } else return ZC_BAD;
    
}/* replay_char */

/*
 * replay_read_key
 *
 * Read a keystroke from a command file.
 *
 */

zchar replay_read_key (void)
{
    zchar key;
    
    key = replay_char ();
    
    if (fgetc (pfp) != '\n') {
	
	replay_close ();
	return ZC_BAD;
	
    } else return key;
    
}/* replay_read_key */

/*
 * replay_read_input
 *
 * Read a line of input from a command file.
 *
 */

zchar replay_read_input (zchar *buf)
{
    zchar c;
    
    for (;;) {
	
	c = replay_char ();
	
	if (c == ZC_BAD || is_terminator (c))
	    break;
	
	*buf++ = c;
	
    }
    
    *buf = 0;
    
    if (fgetc (pfp) != '\n') {
	
	replay_close ();
	return ZC_BAD;
	
    } else return c;
    
}/* replay_read_input */
