/*
 * Copyright (C) 2000, 2001 Loic Dachary
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>

#include "unac.h"

static int usage(const char* message)
{
  fprintf(stderr,
	  "%s"
	  "usage: unaccent [--debug_low] [--debug_high] [--help|-h]\n"
          "\t\t<charset> [<string>] [<expected>]\n"
	  "\tVersion "UNAC_VERSION"\n"
	  "\tReads input from stdin and remove accents from each line,\n"
	  "\tassuming it is encoded in <charset> (iconv -l shows a list of\n"
	  "\tall available charsets).\n"
	  "\tIf <string> is provided, remove accents from <string>.\n"
	  "\tIf <expected> is provided, compare the result and exit on error\n"
	  "\tif not equal. \n"
	  "\tThe unaccented result is always output on stdout.\n",
	  message);
  exit(1);
}

int main(int argc, char** argv) {
  int c;
  static int debug_level = UNAC_DEBUG_NONE;

  while (1) {
    int option_index = 0;
    static struct option long_options[] = {
      {"debug_low", no_argument, &debug_level, UNAC_DEBUG_LOW},
      {"debug_high", no_argument, &debug_level, UNAC_DEBUG_HIGH},
      {"help", no_argument, 0, 0},
      {0, 0, 0, 0}
    };

    c = getopt_long (argc, argv, "h",
		     long_options, &option_index);
    if (c == -1)
      break;

    switch (c) {
    case 0:
      break;

    case '?':
      break;

    default:
      usage("");
      break;
    }
  }

#ifdef UNAC_DEBUG_AVAILABLE
  unac_debug(debug_level);
#else /* UNAC_DEBUG_AVAILABLE */
  if(debug_level > UNAC_DEBUG_NONE)
    fprintf(stderr, "debug is not available, means vsnprintf was not found by configure\n");
#endif /* UNAC_DEBUG_AVAILABLE */

  if(optind >= argc)
    usage("missing <charset>\n");
  else {
    const char* charset = argv[optind++];

    char* unaccented = 0;
    int unaccented_length = 0;

    if(optind >= argc) {
#define BUFFER_SIZE 10240
      char buffer[BUFFER_SIZE];
      while(fgets(buffer, BUFFER_SIZE, stdin)) {
	if(unac_string(charset, buffer, strlen(buffer), &unaccented, &unaccented_length) < 0) {
	  fprintf(stderr, "unac_string attempt to unaccent %s with charset %s failed: ", buffer, charset);
	  perror("");
	  exit(1);
	}
	printf("%.*s", unaccented_length, unaccented);
      }
    } else {
      const char* string = argv[optind++];

      if(unac_string(charset, string, strlen(string), &unaccented, &unaccented_length) < 0) {
	fprintf(stderr, "unac_string attempt to unaccent %s with charset %s failed: ", string, charset);
	perror("");
	exit(1);
      }

      if(debug_level > UNAC_DEBUG_NONE)
	fprintf(stderr, "unaccented version is");
      printf("%.*s\n", unaccented_length, unaccented);

      if(optind < argc) {
	const char* expected = argv[optind++];

	if(unaccented_length != strlen(expected) ||
	   !memcpy(unaccented, expected, unaccented_length)) {
	  if(debug_level > UNAC_DEBUG_NONE)
	    fprintf(stderr, "attempt to unaccent %s with charset %s does not match expected string %s\n", string, charset, expected);
      
	  free(unaccented);
	  return 1;
	}
      }
    }

    free(unaccented);
  }

  return 0;
}
