/*
  LibRCC - interface to spelling libraries used by language recognition code

  Copyright (C) 2005-2008 Suren A. Chilingaryan <csa@dside.dyndns.org>

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as published
  by the Free Software Foundation.

  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 <stdio.h>
#include <stdlib.h>

#include "internal.h"
#include "rccspell.h"

rcc_speller rccSpellerCreate(const char *lang) {
#ifdef HAVE_ASPELL
    rcc_speller rccspeller;
    AspellSpeller *speller = NULL;
    AspellConfig *config;
    AspellCanHaveError *possible_err;

    if (!lang) return NULL;

    rccspeller = (rcc_speller)malloc(sizeof(rcc_speller_s));
    if (!rccspeller) return rccspeller;
    
    config = new_aspell_config();

    if (config) {    
	if (aspell_config_replace(config, "encoding", "utf-8")&&aspell_config_replace(config, "master", lang)) {
	    possible_err = new_aspell_speller(config);
	    if (aspell_error_number(possible_err) == 0) {
		speller = to_aspell_speller(possible_err);
	    }
	}
	delete_aspell_config(config);
    }
    
    rccspeller->speller = speller;
    rccspeller->parents[0] = NULL;
    return rccspeller;
#else 
    return NULL;
#endif /* HAVE_ASPELL */
}

void rccSpellerFree(rcc_speller rccspeller) {
#ifdef HAVE_ASPELL
    if ((rccspeller)&&(rccspeller->speller))
	delete_aspell_speller(rccspeller->speller);
    free(rccspeller);
#endif /* HAVE_ASPELL */
}

int rccSpellerGetError(rcc_speller rccspeller) {
    if ((!rccspeller)||(!rccspeller->speller)) return -1;
    return 0;
}

int rccSpellerAddParent(rcc_speller speller, rcc_speller parent) {
    unsigned int i;
    if ((!speller)||(!parent)) return -1;
    
    for (i=0;speller->parents[i];i++);
    if (i >= RCC_MAX_LANGUAGE_PARENTS) return -1;
    speller->parents[i++] = parent;
    speller->parents[i] = NULL;
    
    return 0;
}

rcc_speller_result rccSpellerSized(rcc_speller speller, const char *word, size_t len, int recursion) {
#ifdef HAVE_ASPELL
    rcc_speller_result result, saved_result = (rcc_speller_result)0;
    unsigned int i;
    int res;

    if (rccSpellerGetError(speller)) return (rcc_speller_result)RCC_SPELLER_INCORRECT;

    if (recursion) {
	for (i=0; speller->parents[i]; i++) {
	    result = rccSpellerSized(speller->parents[i], word, len, 0);
	    if ((result == RCC_SPELLER_CORRECT)||(result == RCC_SPELLER_PARENT)) return RCC_SPELLER_PARENT;
	    if ((result == RCC_SPELLER_ALMOST_CORRECT)||(result == RCC_SPELLER_ALMOST_PARENT)) saved_result = RCC_SPELLER_ALMOST_PARENT;
	}
    }
    
    if (saved_result) return saved_result;

    res = aspell_speller_check(speller->speller, word, len?len:-1);
    return res<=0?RCC_SPELLER_INCORRECT:RCC_SPELLER_CORRECT;    
#endif /* HAVE_ASPELL */
    return 0;
}

rcc_speller_result rccSpeller(rcc_speller speller, const char *word) {
    return rccSpellerSized(speller, word, 0, 1);
}

int rccSpellerResultIsOwn(rcc_speller_result res) {
    if ((res == RCC_SPELLER_ALMOST_CORRECT)||(res == RCC_SPELLER_CORRECT)) return 1;
    return 0;
}

int rccSpellerResultIsPrecise(rcc_speller_result res) {
    if ((res == RCC_SPELLER_PARENT)||(res == RCC_SPELLER_CORRECT)) return 1;
    return 0;
}

int rccSpellerResultIsCorrect(rcc_speller_result res) {
    if ((res == RCC_SPELLER_ALMOST_CORRECT)||(res == RCC_SPELLER_CORRECT)) return 1;
    if ((res == RCC_SPELLER_ALMOST_PARENT)||(res == RCC_SPELLER_PARENT)) return 1;
    return 0;
}