/*
 * Squawk messenger. 
 * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <QObject>
#include <QCryptographicHash>
#include <QMimeDatabase>
#include <QMimeType>
#include <QDataStream>

#include "shared/enums.h"
#include "shared/message.h"
#include "shared/exception.h"
#include <list>

#include <base.h>
#include <storage.h>
#include <cursor.h>

namespace Core {

class Archive : public QObject {
    Q_OBJECT
public:
    class AvatarInfo;
    
    Archive(const QString& account, const QString& jid, QObject* parent = 0);
    ~Archive();
    
    void open();
    void close();
    
    bool addElement(const Shared::Message& message);
    unsigned int addElements(const std::list<Shared::Message>& messages);
    Shared::Message getElement(const QString& id) const;
    bool hasElement(const QString& id) const;
    void changeMessage(const QString& id, const QMap<QString, QVariant>& data);
    Shared::Message oldest() const;
    QString oldestId() const;
    Shared::Message newest() const;
    QString newestId() const;
    void clear();
    long unsigned int size() const;
    std::list<Shared::Message> getBefore(unsigned int count, const QString& id);
    bool isFromTheBeginning() const;
    void setFromTheBeginning(bool is);
    Shared::EncryptionProtocol encryption() const;
    bool setEncryption(Shared::EncryptionProtocol value);     //returns true if changed, false otherwise
    bool setAvatar(const QByteArray& data, AvatarInfo& info, bool generated = false, const QString& resource = "");
    AvatarInfo getAvatarInfo(const QString& resource = "") const;
    bool readAvatarInfo(AvatarInfo& target, const QString& resource = "") const;
    void readAllResourcesAvatars(std::map<QString, AvatarInfo>& data) const;
    QString idByStanzaId(const QString& stanzaId) const;
    QString stanzaIdById(const QString& id) const;
    
public:
    const QString jid;
    const QString account;
    
public:
    class AvatarInfo {
    public:
        AvatarInfo();
        AvatarInfo(const QString& type, const QByteArray& hash, bool autogenerated);
        
        QString type;
        QByteArray hash;
        bool autogenerated;
    };
    
private:
    bool opened;
    LMDBAL::Base db;
    LMDBAL::Storage<QString, Shared::Message>* messages;
    LMDBAL::Storage<uint64_t, QString>* order;
    LMDBAL::Storage<QString, QVariant>* stats;
    LMDBAL::Storage<QString, AvatarInfo>* avatars;
    LMDBAL::Storage<QString, QString>* stanzaIdToId;
    mutable LMDBAL::Cursor<uint64_t, QString> cursor;
};

}

QDataStream& operator << (QDataStream &out, const Core::Archive::AvatarInfo& info);
QDataStream& operator >> (QDataStream &in, Core::Archive::AvatarInfo& info);