/* The contents of this file are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this file except in compliance with 
 * the License. You may obtain a copy of the License at 
 * http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 * 
 * The Original Code is Libvoikko: Library of natural language processing tools.
 * The Initial Developer of the Original Code is Harri Pitkänen <hatapitk@iki.fi>.
 * Portions created by the Initial Developer are Copyright (C) 2009 - 2010
 * the Initial Developer. All Rights Reserved.
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *********************************************************************************/

#include "spellchecker/suggestion/SuggestionGeneratorReplaceTwo.hpp"
#include "spellchecker/suggestion/SuggestionGeneratorCaseChange.hpp"
#include "character/SimpleChar.hpp"
#include <cwchar>

using namespace libvoikko::character;

namespace libvoikko { namespace spellchecker { namespace suggestion {

SuggestionGeneratorReplaceTwo::SuggestionGeneratorReplaceTwo(
	const wchar_t * replacements, morphology::Analyzer * morAnalyzer) :
	replacements(replacements), morAnalyzer(morAnalyzer) { }

void SuggestionGeneratorReplaceTwo::generate(SuggestionStatus * s) const {
	size_t wlen = s->getWordLength();
	wchar_t * buffer = new wchar_t[wlen + 1];
	for (size_t i = 0; i < wlen; ++i) {
		buffer[i] = SimpleChar::lower(s->getWord()[i]);
	}
	buffer[wlen] = L'\0';
	
	for (size_t i = 0; i < wlen - 1; ++i) {
		wchar_t replaced = buffer[i];
		if (replaced != buffer[i + 1]) {
			continue;
		}
		for (const wchar_t * j = replacements; *j != L'\0'; j += 2) {
			if (*j != replaced) {
				continue;
			}
			buffer[i] = *(j + 1);
			buffer[i + 1] = *(j + 1);
			SuggestionGeneratorCaseChange::suggestForBuffer(morAnalyzer,
			    s, buffer, wlen);
			if (s->shouldAbort()) {
				break;
			}
		}
		buffer[i] = replaced;
		buffer[i + 1] = replaced;
		if (s->shouldAbort()) {
			break;
		}
		++i;
	}
	
	delete[] buffer;
}

}}}
