/* Ricochet - https://ricochet.im/
 * Copyright (C) 2014, John Brooks <john.brooks@dereferenced.net>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *    * Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following disclaimer
 *      in the documentation and/or other materials provided with the
 *      distribution.
 *
 *    * Neither the names of the copyright owners nor the names of its
 *      contributors may be used to endorse or promote products derived from
 *      this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef HIDDENSERVICE_H
#define HIDDENSERVICE_H

#include <QObject>
#include <QHostAddress>
#include <QList>
#include "CryptoKey.h"

namespace Tor
{

class TorSocket;

// This class is used to receive synchroneous notifications from the hidden service.
// Each client should implement its own notification handling.

class HiddenServiceClient
{
public:
    virtual void hiddenServiceStatusChanged(int /* newStatus */, int /* oldStatus */) =0;
    virtual void hiddenServiceOnline() =0;
    virtual void hiddenServicePrivateKeyChanged() =0;
    virtual void hiddenServiceHostnameChanged() =0;
};

class HiddenService : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY(HiddenService)

    friend class TorControlPrivate;

public:
    struct Target
    {
        QHostAddress targetAddress;
        quint16 servicePort, targetPort;
    };

    enum Status
    {
        NotCreated = -1, /* Service has not been created yet */
        Offline = 0, /* Data exists, but service is not published */
        Online /* Published */
    };

    HiddenService(HiddenServiceClient *client);
    HiddenService(HiddenServiceClient *client,const QString &dataPath);
    HiddenService(HiddenServiceClient *client,const CryptoKey &privateKey, const QString &dataPath = QString());

    Status status() const { return m_status; }

    const QString& hostname() const { return m_hostname; }
    const QString  serviceId() const { return QString(m_service_id); }
    const QString& dataPath() const { return m_dataPath; }

    CryptoKey privateKey() { return m_privateKey; }
    void setPrivateKey(const CryptoKey &privateKey);
    void setServiceId(const QByteArray& sid);

    const QList<Target> &targets() const { return m_targets; }
    void addTarget(const Target &target);
    void addTarget(quint16 servicePort, QHostAddress targetAddress, quint16 targetPort);

private slots:
    void servicePublished();

private:
    QString m_dataPath;
    QList<Target> m_targets;
    QString m_hostname;
    Status m_status;
    CryptoKey m_privateKey;
    QByteArray m_service_id;

    void loadPrivateKey();
    void setStatus(Status newStatus);

    HiddenServiceClient *m_client;
};

}

#endif // HIDDENSERVICE_H