//
//  NLPacket.h
//  libraries/networking/src
//
//  Created by Clement on 7/6/15.
//  Copyright 2015 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#ifndef hifi_NLPacket_h
#define hifi_NLPacket_h

#include <QtCore/QSharedPointer>

#include "udt/Packet.h"

class NLPacket : public Packet {
    Q_OBJECT
public:
    static std::unique_ptr<NLPacket> create(PacketType::Value type, qint64 size = -1);
    static std::unique_ptr<NLPacket> fromReceivedPacket(std::unique_ptr<char[]> data, qint64 size,
                                                        const HifiSockAddr& senderSockAddr);
    // Provided for convenience, try to limit use
    static std::unique_ptr<NLPacket> createCopy(const NLPacket& other);

    static qint64 localHeaderSize(PacketType::Value type);
    static qint64 maxPayloadSize(PacketType::Value type);

    virtual qint64 totalHeadersSize() const; // Cumulated size of all the headers
    virtual qint64 localHeaderSize() const;  // Current level's header size

    const QUuid& getSourceID() const { return _sourceID; }
    const QByteArray& getVerificationHash() const { return _verificationHash; }
    
    void writeSourceID(const QUuid& sourceID);
    void writeVerificationHash(const QByteArray& verificationHash);

    QByteArray payloadHashWithConnectionUUID(const QUuid& connectionUUID) const;

protected:
    
    void adjustPayloadStartAndCapacity();
    
    NLPacket(PacketType::Value type);
    NLPacket(PacketType::Value type, qint64 size);
    NLPacket(std::unique_ptr<char[]> data, qint64 size, const HifiSockAddr& senderSockAddr);
    NLPacket(const NLPacket& other);

    void readSourceID();
    void readVerificationHash();

    QUuid _sourceID;
    QByteArray _verificationHash;
};

#endif // hifi_NLPacket_h