/*
 * Bittorrent Client using Qt4 and libtorrent.
 * Copyright (C) 2006  Christophe Dumez
 *
 * 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.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * Contact : chris@qbittorrent.org
 */

#ifndef TORRENTPERSISTENTDATA_H
#define TORRENTPERSISTENTDATA_H

#include <QHash>
#include <QStringList>
#include <vector>

QT_BEGIN_NAMESPACE
class QDateTime;
QT_END_NAMESPACE

class QTorrentHandle;

class TorrentTempData {
  // This class stores strings w/o modifying separators
public:
  static bool hasTempData(const QString &hash);
  static void deleteTempData(const QString &hash);
  static void setFilesPriority(const QString &hash,  const std::vector<int> &pp);
  static void setFilesPath(const QString &hash, const QStringList &path_list);
  static void setSavePath(const QString &hash, const QString &save_path);
  static void setLabel(const QString &hash, const QString &label);
  static void setSequential(const QString &hash, const bool &sequential);
  static bool isSequential(const QString &hash);
  static void setSeedingMode(const QString &hash, const bool &seed);
  static bool isSeedingMode(const QString &hash);
  static QString getSavePath(const QString &hash);
  static QStringList getFilesPath(const QString &hash);
  static QString getLabel(const QString &hash);
  static void getFilesPriority(const QString &hash, std::vector<int> &fp);
  static bool isMoveInProgress(const QString &hash);
  static void enqueueMove(const QString &hash, const QString &queuedPath);
  static void startMove(const QString &hash, const QString &oldPath, const QString& newPath);
  static void finishMove(const QString &hash);
  static QString getOldPath(const QString &hash);
  static QString getNewPath(const QString &hash);
  static QString getQueuedPath(const QString &hash);

private:
  struct TorrentData {
    TorrentData(): sequential(false), seed(false) {}
    std::vector<int> files_priority;
    QStringList path_list;
    QString save_path;
    QString label;
    bool sequential;
    bool seed;
  };

  struct TorrentMoveState {
    TorrentMoveState(QString oldPath, QString newPath)
      : oldPath(oldPath)
      , newPath(newPath)
    {}

    // the moving occurs from oldPath to newPath
    // queuedPath is where files should be moved to, when current moving is completed
    QString oldPath;
    QString newPath;
    QString queuedPath;
  };

  static QHash<QString, TorrentData> data;
  static QHash<QString, TorrentMoveState> torrentMoveStates;
};

class HiddenData {
public:
  static void addData(const QString &hash);
  static bool hasData(const QString &hash);
  static void deleteData(const QString &hash);
  static int getSize();
  static int getDownloadingSize();
  static void gotMetadata(const QString &hash);

private:
  static QHash<QString, bool> data;
  static unsigned int metadata_counter;
};

class TorrentPersistentData {
  // This class stores strings w/o modifying separators
public:
  enum RatioLimit {
    USE_GLOBAL_RATIO = -2,
    NO_RATIO_LIMIT = -1
  };

public:
  static bool isKnownTorrent(QString hash);
  static QStringList knownTorrents();
  static void setRatioLimit(const QString &hash, const qreal &ratio);
  static qreal getRatioLimit(const QString &hash);
  static bool hasPerTorrentRatioLimit() ;
  static void setAddedDate(const QString &hash, const QDateTime &time);
  static QDateTime getAddedDate(const QString &hash);
  static void setErrorState(const QString &hash, const bool has_error);
  static bool hasError(const QString &hash);
  static QDateTime getSeedDate(const QString &hash);
  static void deletePersistentData(const QString &hash);
  static void saveTorrentPersistentData(const QTorrentHandle &h, const QString &save_path = QString::null, const bool is_magnet = false);

  // Setters
  static void saveSavePath(const QString &hash, const QString &save_path);
  static void saveLabel(const QString &hash, const QString &label);
  static void saveName(const QString &hash, const QString &name);
  static void savePriority(const QTorrentHandle &h);
  static void savePriority(const QString &hash, const int &queue_pos);
  static void saveSeedStatus(const QTorrentHandle &h);
  static void saveSeedStatus(const QString &hash, const bool seedStatus);

  // Getters
  static QString getSavePath(const QString &hash);
  static QString getLabel(const QString &hash);
  static QString getName(const QString &hash);
  static int getPriority(const QString &hash);
  static bool isSeed(const QString &hash);
  static bool isMagnet(const QString &hash);
  static QString getMagnetUri(const QString &hash);
};

#endif // TORRENTPERSISTENTDATA_H