/* 
 * $Id$
 *
 * (c) 2004 by Kalle Wallin <kaw@linux.se>
 *
 * 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
 *
 */

#include "support.h"
#include "ncmpc.h"

#include <time.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BUFSIZE 1024

extern void screen_status_printf(const char *format, ...);

static gboolean noconvert = TRUE;

size_t
my_strlen(const char *str)
{
  if( g_utf8_validate(str,-1,NULL) )
    return g_utf8_strlen(str,-1);
  else
    return strlen(str);
}

char *
remove_trailing_slash(char *path)
{
  int len;

  if( path==NULL )
    return NULL;

  len=strlen(path);
  if( len>1 && path[len-1] == '/' )
    path[len-1] = '\0';

  return path;
}

char *
lowerstr(char *str)
{
  gsize i;
  gsize len = strlen(str);

  if( str==NULL )
    return NULL;

  i=0;
  while(i<len && str[i])
    {
      str[i] = tolower(str[i]);
      i++;
    }
  return str;
}


#ifndef HAVE_BASENAME
char *
basename(char *path)
{
  char *end;

  path = remove_trailing_slash(path);
  end = path + strlen(path);

  while( end>path && *end!='/' )
    end--;

  if( *end=='/' && end!=path )
    return end+1;

  return path;
}
#endif /* HAVE_BASENAME */


#ifndef HAVE_STRCASESTR
char *
strcasestr(const char *haystack, const char *needle)
{
  return strstr(lowerstr(haystack), lowerstr(needle));
}
#endif /* HAVE_STRCASESTR */

// FIXME: utf-8 length
char *
strscroll(char *str, char *separator, int width, scroll_state_t *st)
{
	gchar *tmp, *buf;
	gsize len, size;

	if( st->offset==0 ) {
		st->offset++;
		return g_strdup(str);
	}

	/* create a buffer containing the string and the separator */
	size = strlen(str)+strlen(separator)+1;
	tmp = g_malloc(size);
	g_strlcpy(tmp, str, size);
	g_strlcat(tmp, separator, size);
	len = my_strlen(tmp);

	if( st->offset >= len )
		st->offset = 0;

	/* create the new scrolled string */
	size = width+1;
	if (g_utf8_validate(tmp, -1, NULL) ) {
		int ulen;
		buf = g_malloc(size*6);// max length of utf8 char is 6
		g_utf8_strncpy(buf, g_utf8_offset_to_pointer(tmp,st->offset), size);
		if( (ulen = g_utf8_strlen(buf, -1)) < width )
			g_utf8_strncpy(buf+strlen(buf), tmp, size - ulen - 1);
	} else {
		buf = g_malloc(size);
		g_strlcpy(buf, tmp+st->offset, size);
		if (strlen(buf) < (size_t)width)
			g_strlcat(buf, tmp, size);
	}
	if( time(NULL)-st->t >= 1 ) {
		st->t = time(NULL);
		st->offset++;
	}
	g_free(tmp);
	return buf;
}

void
charset_init(gboolean disable)
{
  noconvert = disable;
}

char *
utf8_to_locale(const char *utf8str)
{
  gchar *str;
  gsize rb, wb;
  GError *error;

  if( noconvert )
    return g_strdup(utf8str);

  rb = 0; /* bytes read */
  wb = 0; /* bytes written */
  error = NULL;
  str=g_locale_from_utf8(utf8str, 
			 strlen(utf8str),
			 &wb, &rb,
			 &error);
  if( error )
    {
      const char *charset;

      g_get_charset(&charset);
      screen_status_printf(_("Error: Unable to convert characters to %s"),
			   charset);
      D("utf8_to_locale(): %s\n", error->message);
      g_error_free(error);
      return g_strdup(utf8str);
    }
  
  return str;
}

char *
locale_to_utf8(const char *localestr)
{
  gchar *str;
  gsize rb, wb;
  GError *error;

  if( noconvert )
    return g_strdup(localestr);

  rb = 0; /* bytes read */
  wb = 0; /* bytes written */
  error = NULL;
  str=g_locale_to_utf8(localestr, 
		       strlen(localestr), 
		       &wb, &rb,
		       &error);
  if( error )
    {
      screen_status_printf(_("Error: Unable to convert characters to UTF-8"));
      D("locale_to_utf8: %s\n", error->message);
      g_error_free(error);
      return g_strdup(localestr);
    }

  return str;
}