/* This file is part of Kiten, a KDE Japanese Reference Tool...
 Copyright (C) 2001  Jason Katz-Brown <jason@katzbrown.com>
           (C) 2006  Joseph Kerian <jkerian@gmail.com>
			  (C) 2006  Eric Kjeldergaard <kjelderg@gmail.com>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/
#include "dictFileDeinflect.h"
#include "entryDeinflect.h"
#include "EntryList.h"

#include <kdebug.h>
#include <kstandarddirs.h>
#include <kmessagebox.h>
#include <klocale.h>

#include <QtCore/QString>
#include <QtCore/QHash>
#include <QtCore/QList>
#include <QtCore/QFile>
#include <QtCore/QRegExp>
#include <QtCore/QTextCodec>
#include <QtCore/QTextStream>

//This is a very primative form of information hiding
//But C++ can get stupid with static QT objects...
//So this turns out to be much, much easier
//TODO: Fix this for thread safety/functionality (I'm presuming it's broken atm)

//Declare our constants
QList<dictFileDeinflect::Conjugation> *dictFileDeinflect::conjugationList = NULL;

dictFileDeinflect::dictFileDeinflect() : dictFile("Deinflect") {}

QStringList dictFileDeinflect::listDictDisplayOptions(QStringList orig) const {
	return QStringList("Deinflection");
}
bool dictFileDeinflect::validDictionaryFile(const QString &filename) {
	return false;
}
bool dictFileDeinflect::validQuery(const DictQuery &query) {
	return true;
}

bool dictFileDeinflect::loadDictionary(const QString &file, const QString &name)
{
	if (conjugationList != NULL)
		return true;

	conjugationList = new QList<Conjugation>;

	QString vconj;
	if(file.isEmpty()) {
		KStandardDirs *dirs = KGlobal::dirs();
		vconj = dirs->findResource("data", "kiten/vconj");
		//Find the file
		if (vconj.isEmpty())
		{
			KMessageBox::error(0, i18n("Verb deinflection information not found, so verb deinflection cannot be used."));
			return false;
		}
	} else
		vconj = file;

	QHash<unsigned long,QString> names;
	//Open the file
	QFile f(vconj);
	if (!f.open(QIODevice::ReadOnly))
	{
		KMessageBox::error(0, i18n("Verb deinflection information could not be loaded, so verb deinflection cannot be used."));
		return false;
	}

	QTextStream t(&f);
	t.setCodec(QTextCodec::codecForName("eucJP"));

	//The file starts out with a number -> name list of the conjugation types
	//In the format "#[#].\tNAME\n"
	//The next section beginning is flagged with a $ at the beginning of the line
	for(QString text = t.readLine(); !t.atEnd() && text.at(0) != '$';
			text = t.readLine())
	{
		if(text.at(0) != '#')
		{
			unsigned long number = text.left(2).trimmed().toULong();
			QString name = text.right(text.length() - 2).trimmed();
			names[number] = name;
		}
	}

	//Now for the actual conjugation data
	//Format is "ENDING_TO_REPLACE\tREPLACEMENT\tNUMBER_FROM_LIST_ABOVE\n"
	for(QString text = t.readLine(); !text.isEmpty(); text = t.readLine())
	{
		if(text.at(0) != '#') //We still have these comments everywhere
		{
			QStringList things( text.split(QChar('\t') ));

			Conjugation conj;
			conj.ending = things.first();
			conj.replace = (things.at(1));
			conj.label = names.find(things.last().toULong()).value();

			conjugationList->append(conj);
		}
	}

	f.close();

	m_dictionaryName = name;

	return true;
}


EntryList *dictFileDeinflect::doSearch(const DictQuery &query)
{
	if (conjugationList == NULL)
		return NULL;

	QString text = query.getWord();
	if(text.isEmpty())
		text = query.getPronunciation();
	if(text.isEmpty())
		return NULL;

	EntryList *ret = new EntryList;
	int index = 0;
	foreach(const Conjugation &it, *conjugationList)
	{
		if(text.endsWith(it.ending)) {
			QString replacement = text;
			replacement.truncate(text.length()-it.ending.length());
			replacement += it.replace;
			entryDeinflect *foo = new entryDeinflect(replacement,it.label,index++,it.ending);
			ret->append(foo);

			if(ret->count() >= 3)
				return ret;
		}
	}
	return ret;
}