/***************************************************************************
        scan a group of KVTML documents to get information from them
    -----------------------------------------------------------------------
    copyright      : (C) 2007 Jeremy Whiting <jeremy@scitools.com>
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "sharedkvtmlfiles.h"

#include "keduvocdocument.h"

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

#include <QList>

#include <kglobal.h>

class SharedKvtmlFilesPrivate
{
  public:
	SharedKvtmlFiles instance;

    /** list of all files found */
    QStringList m_fileList;
	
	/** list of all files titles found */
	QStringList m_titleList;
	
	/** list of file comments */
	QStringList m_commentList;
	
	/** map of files by language key */
	QMap<QString, QStringList> m_filesByLang;
};

K_GLOBAL_STATIC(SharedKvtmlFilesPrivate, sharedKvtmlFilesPrivate)

SharedKvtmlFiles *SharedKvtmlFiles::self()
{
    // returns the singleton; automatically creates a new instance if that has not happened yet.
    return &sharedKvtmlFilesPrivate->instance;
}

SharedKvtmlFiles::SharedKvtmlFiles()
{
	rescan();
}

SharedKvtmlFiles::~SharedKvtmlFiles()
{
}

void SharedKvtmlFiles::rescan()
{
	sharedKvtmlFilesPrivate->m_titleList.clear();
	sharedKvtmlFilesPrivate->m_commentList.clear();
	sharedKvtmlFilesPrivate->m_filesByLang.clear();
	sharedKvtmlFilesPrivate->m_fileList = KGlobal::dirs()->findAllResources("data", "kvtml/*.kvtml");
	
	KEduVocDocument *doc = new KEduVocDocument();
	for (int i = 0; i < sharedKvtmlFilesPrivate->m_fileList.size(); ++i)
	{
		// open the file
		doc->open(KUrl::fromPath(sharedKvtmlFilesPrivate->m_fileList[i]));
		
		// add it's title to the title list
		sharedKvtmlFilesPrivate->m_titleList.append(doc->title());
		
		// add it's comment to the comment list
		sharedKvtmlFilesPrivate->m_commentList.append(doc->documentRemark());
		
		// then add it under its main language in the map
		QString language = doc->originalIdentifier();
		if (language.isEmpty())
		{
			language = I18N_NOOP("none");
		}
		if (sharedKvtmlFilesPrivate->m_filesByLang.contains(language))
		{
			sharedKvtmlFilesPrivate->m_filesByLang[language].append(sharedKvtmlFilesPrivate->m_fileList[i]);
		}
		else
		{
			QStringList list;
			list.append(sharedKvtmlFilesPrivate->m_fileList[i]);
			sharedKvtmlFilesPrivate->m_filesByLang.insert(language, list);
		}
	}
}

QStringList SharedKvtmlFiles::languages()
{
	return sharedKvtmlFilesPrivate->m_filesByLang.keys();
}

QStringList SharedKvtmlFiles::fileNames(const QString &language)
{
	// return files by language for given language if it's not empty
	// otherwise return all filenames
	return language.isEmpty() ? sharedKvtmlFilesPrivate->m_fileList : sharedKvtmlFilesPrivate->m_filesByLang.value(language);
}

/** get the list of document titles found of a given language
  *@param language requested language 
  *@return a list of document titles with words in language
  */
QStringList SharedKvtmlFiles::titles(const QString &language)
{
	QStringList retlist;

	if (language.isEmpty())
	{
		retlist = sharedKvtmlFilesPrivate->m_titleList;
	}
	else
	{
		QStringList filenames = sharedKvtmlFilesPrivate->m_filesByLang.value(language);
		for (int i = 0; i < filenames.size(); ++i)
		{
			retlist.append(sharedKvtmlFilesPrivate->m_titleList[sharedKvtmlFilesPrivate->m_fileList.indexOf(filenames[i])]);
		}
	}

	return retlist;
}

QStringList SharedKvtmlFiles::comments(const QString &language)
{
	QStringList retlist;

	if (language.isEmpty())
	{
		retlist = sharedKvtmlFilesPrivate->m_commentList;
	}
	else
	{
		QStringList filenames = sharedKvtmlFilesPrivate->m_filesByLang.value(language);
		for (int i = 0; i < filenames.size(); ++i)
		{
			retlist.append(sharedKvtmlFilesPrivate->m_commentList[sharedKvtmlFilesPrivate->m_fileList.indexOf(filenames[i])]);
		}
	}

	return retlist;
}