/* ============================================================
*
* This file is a part of kipi-plugins project
* http://www.digikam.org
*
* Date        : 2014-09-30
* Description : a plugin to export to a remote Piwigo server.
*
* Copyright (C) 2003-2005 by Renchi Raju <renchi dot raju at gmail dot com>
* Copyright (C) 2006      by Colin Guthrie <kde at colin dot guthr dot ie>
* Copyright (C) 2006-2016 by Gilles Caulier <caulier dot gilles at gmail dot com>
* Copyright (C) 2008      by Andrea Diamantini <adjam7 at gmail dot com>
* Copyright (C) 2010-2014 by Frederic Coiffier <frederic dot coiffier at free dot 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, 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.
*
* ============================================================ */

#ifndef PIWIGOTALKER_H
#define PIWIGOTALKER_H

// Qt includes

#include <QObject>
#include <QList>
#include <QDateTime>
#include <QTextStream>
#include <QFile>
#include <QUrl>
#include <QNetworkReply>
#include <QNetworkAccessManager>

// Libkipi includes

#include <KIPI/Interface>

using namespace KIPI;

template <class T> class QList;

namespace KIPIPiwigoExportPlugin
{

class GAlbum;
class GPhoto;

class PiwigoTalker : public QObject
{
    Q_OBJECT

public:

    enum State
    {
        GE_LOGOUT = -1,
        GE_LOGIN  = 0,
        GE_GETVERSION,
        GE_LISTALBUMS,
        GE_CHECKPHOTOEXIST,
        GE_GETINFO,
        GE_SETINFO,
        GE_ADDPHOTOCHUNK,
        GE_ADDPHOTOSUMMARY
    };

    enum
    {
        CHUNK_MAX_SIZE = 512*1024,
        PIWIGO_VER_2_4 = 24
    };

public:

    PiwigoTalker(QWidget* const parent);
    ~PiwigoTalker();

    static QString getAuthToken()
    {
        return s_authToken;
    };

    bool loggedIn() const;

    void login(const QUrl& url, const QString& name, const QString& passwd);
    void listAlbums();
    void listPhotos(const QString& albumName);

    /* TODO Implement this function
    void createAlbum(const QString& parentAlbumName,
                     const QString& albumName,
                     const QString& albumTitle,
                     const QString& albumCaption);*/

    bool addPhoto(int albumId,
                  const QString& photoPath,
                  bool  rescale = false, int maxWidth = 1600, int maxHeight = 1600, int quality = 95);

    void cancel();

Q_SIGNALS:

    void signalProgressInfo(const QString& msg);
    void signalError(const QString& msg);
    void signalLoginFailed(const QString& msg);
    void signalBusy(bool val);
    void signalAlbums(const QList<GAlbum>& albumList);
    void signalAddPhotoSucceeded();
    void signalAddPhotoFailed(const QString& msg);

private:

    void parseResponseLogin(const QByteArray& data);
    void parseResponseGetVersion(const QByteArray& data);
    void parseResponseListAlbums(const QByteArray& data);
    void parseResponseDoesPhotoExist(const QByteArray& data);
    void parseResponseGetInfo(const QByteArray& data);
    void parseResponseSetInfo(const QByteArray& data);

    void addNextChunk();
    void parseResponseAddPhotoChunk(const QByteArray& data);
    void addPhotoSummary();
    void parseResponseAddPhotoSummary(const QByteArray& data);

    QByteArray computeMD5Sum(const QString& filepath);
    void deleteTemporaryFile();

private Q_SLOTS:

    void slotFinished(QNetworkReply* reply);

private:

    QWidget*               m_parent;
    State                  m_state;
    QString                m_cookie;
    QUrl                   m_url;
    QNetworkAccessManager* m_netMngr;
    QNetworkReply*         m_reply;
    bool                   m_loggedIn;
    QByteArray             m_talker_buffer;
    uint                   m_chunkId;
    uint                   m_nbOfChunks;
    int                    m_version;

    QByteArray             m_md5sum;
    QString                m_path;
    QString                m_tmpPath;    // If set, contains a temporary file which must be deleted
    int                    m_albumId;
    int                    m_photoId;    // Filled when the photo already exist
    QString                m_comment;    // Synchronized with Piwigo comment
    QString                m_title;      // Synchronized with Piwigo name
    QString                m_author;     // Synchronized with Piwigo author
    QDateTime              m_date;       // Synchronized with Piwigo date
    Interface*             m_iface;

    static QString         s_authToken;
};

} // namespace KIPIPiwigoExportPlugin

#endif /* PIWIGOTALKER_H */
