#ifndef TRANSLATOR_H
#define TRANSLATOR_H

/*
 * Copyright (C) 2007-2009 Sergio Pistone <sergio_pistone@yahoo.com.ar>
 * Copyright (C) 2010-2017 Mladen Milinkovic <max@smoothware.net>
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "language.h"
#include "dialogs/progressdialog.h"

#include <QObject>
#include <QMap>
#include <QByteArray>

class KJob;
namespace KIO {
class Job;
class TransferJob;
}
namespace SubtitleComposer {
class Translator : public QObject
{
	Q_OBJECT

public:
	static const int MaxChunkSize = 25000; // in characters

	Translator(QObject *parent = 0);
	~Translator();

	QString inputText() const;
	QString outputText() const;

	Language::Value inputLanguage() const;
	Language::Value outputLanguage() const;

	int chunksCount() const; // upon how many chunks will the imput text be split on?

	bool isFinished() const;
	bool isFinishedWithError() const;
	bool isAborted() const;

	QString errorMessage() const;

public slots:
	bool syncTranslate(const QString &text, Language::Value inputLang, Language::Value outputLang, ProgressDialog *pd = 0);
	void translate(const QString &text, Language::Value inputLang, Language::Value outputLang);

	void abort();

signals:
	void progress(int percentage);

	void finished(const QString &translatedText);
	void finishedWithError(const QString &errorMessage);

	void finished(); // finished with or without error

private:
	static QByteArray prepareUrlEncodedData(const QMap<QString, QString> &params);
	static QByteArray prepareMultipartData(const QMap<QString, QString> &params);
	static QString & replaceHTMLEntities(QString &text);
	static const QMap<QString, QChar> & namedEntities();

	void startChunkDownload(int chunkNumber); // first chunk is number 1

private slots:
	void onTransferJobProgress(KJob *job, unsigned long percent);
	void onTransferJobData(KIO::Job *job, const QByteArray &data);
	void onTransferJobResult(KJob *job);

private:
	KIO::TransferJob *m_currentTransferJob;
	QByteArray m_currentTransferData;
	QStringList m_inputTextChunks;
	QString m_outputText;
	Language::Value m_inputLanguage;
	Language::Value m_outputLanguage;
	int m_lastReceivedChunk;
	QString m_errorMessage;
	bool m_aborted;
};
}
#endif
