/**************************************************************************
**
** This file is part of Qt Creator
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** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
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** contained in the Technology Preview License Agreement accompanying
** this package.
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** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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#ifndef SSHCONNECTION_H
#define SSHCONNECTION_H

#include "ssherrors.h"

#include <utils/utils_global.h>

#include <QtCore/QByteArray>
#include <QtCore/QObject>
#include <QtCore/QSharedPointer>
#include <QtCore/QString>

namespace Utils {
class SftpChannel;
class SshRemoteProcess;

namespace Internal {
class SshConnectionPrivate;
} // namespace Internal

struct QTCREATOR_UTILS_EXPORT SshConnectionParameters
{
    enum ProxyType { DefaultProxy, NoProxy };
    enum AuthenticationType { AuthenticationByPassword, AuthenticationByKey };
    SshConnectionParameters(ProxyType proxyType);

    QString host;
    QString userName;
    QString password;
    QString privateKeyFile;
    int timeout; // In seconds.
    AuthenticationType authenticationType;
    quint16 port;
    ProxyType proxyType;
};

QTCREATOR_UTILS_EXPORT bool operator==(const SshConnectionParameters &p1, const SshConnectionParameters &p2);
QTCREATOR_UTILS_EXPORT bool operator!=(const SshConnectionParameters &p1, const SshConnectionParameters &p2);

/*
 * This class provides an SSH connection, implementing protocol version 2.0
 * It can spawn channels for remote execution and SFTP operations (version 3).
 * It operates asynchronously (non-blocking) and is not thread-safe.
 */
class QTCREATOR_UTILS_EXPORT SshConnection : public QObject
{
    Q_OBJECT
    Q_DISABLE_COPY(SshConnection)
public:
    enum State { Unconnected, Connecting, Connected };
    typedef QSharedPointer<SshConnection> Ptr;

    static Ptr create();

    void connectToHost(const SshConnectionParameters &serverInfo);
    void disconnectFromHost();
    State state() const;
    SshError errorState() const;
    QString errorString() const;
    SshConnectionParameters connectionParameters() const;
    ~SshConnection();

    QSharedPointer<SshRemoteProcess> createRemoteProcess(const QByteArray &command);
    QSharedPointer<SftpChannel> createSftpChannel();

signals:
    void connected();
    void disconnected();
    void dataAvailable(const QString &message);
    void error(Utils::SshError);

private:
    SshConnection();

    Internal::SshConnectionPrivate *d;
};

} // namespace Internal

#endif // SSHCONNECTION_H