/*
 * Copyright 2014-2016 Markus Prasser
 *
 * This file is part of Labcontrol.
 *
 *  Labcontrol 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.
 *
 *  Labcontrol 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 Labcontrol.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef CLIENT_H
#define CLIENT_H

#include <QMessageBox>
#include <QPlainTextEdit>
#include <QProcess>
#include <QString>
#include <QTextStream>
#include <QThread>
#include <QTimer>

#include "global.h"
#include "clientpinger.h"

namespace lc {

//! Class which represents the clients in the lab
/*!
  This class contains elements and functions needed to represent all functions of a client.
*/
class Client : public QObject {
    Q_OBJECT

public slots:
    //! Sets the STATE of the client to 'ZLEAF_RUNNING'
    void SetStateToZLEAF_RUNNING( QString argClientIP );

public:
    const QString ip;
    const QString mac;
    const QString name;
    const unsigned short int xPosition = 1;
    const unsigned short int yPosition = 1;

    /*!
     * \brief Client's constructor
     * \param argIP         The IP address the represented client has
     * \param argMAC        The MAC address the represented client has
     * \param argName       The hostname of the represented client
     * \param argXPosition  The client's x coordinate in the lab's grid
     * \param argYPosition  The client's y coordinate in the lab's grid
     */
    Client( const QString &argIP, const QString &argMAC, const QString &argName,
            unsigned short int argXPosition, unsigned short int argYPosition,
            const QString &argPingCmd );
    //! Client's destructor
    ~Client();
    //! Beams the chosen file to the client's 'media4ztree' directory
    /*!
      @param argFileToBeam                  The file which shall be beamed to the client's 'media4ztree' directory
      @param argPublickeyPathUser           The path to the publickey for user login on the clients
      @param argUserNameOnClients           The name of the user on the clients
    */
    void BeamFile( const QString &argFileToBeam, const QString * const argPublickeyPathUser, const QString * const argUserNameOnClients );
    /*!
     * \brief Boots the client
     */
    void Boot();
    /*!
     * \brief DeactiveScreensaver deactivates potentially running screensavers on the client
     */
    void DeactiveScreensaver();
    //! Returns the current state of the client
    /*!
      @return The current state of the client
    */
    state_t GetClientState() const { return state; }
    int GetSessionPort() const { return sessionPort; }
    /*!
     * \brief Kills all processes 'zleaf.exe' on the client
     */
    void KillZLeaf();
    //! Opens a file manager for the client's file system
    /*!
     @param argUserToBeUsed                 The name of the user on the clients
    */
    void OpenFilesystem( const QString * const argUserToBeUsed );
    /*!
     * \brief Opens a terminal for the client
     * \param argCommand    A command which shall be executed in the terminal window (Pass an empty QString if not wanted)
     * \param argOpenAsRoot Run the terminal session as root (true) or as normal user (false)
     */
    void OpenTerminal( const QString &argCommand, const bool &argOpenAsRoot );
    void SetSessionPort( int argSP ) { sessionPort = argSP; }
    void SetzLeafVersion( const QString &argzLeafV ) { zLeafVersion = argzLeafV; }
    //! Shows the desktop of the given client
    void ShowDesktopViewOnly();
    void ShowDesktopFullControl();
    /*!
     * \brief Shuts down the client
     */
    void Shutdown();
    //! Starts a zLeaf instance on the client
    /*!
     @param argFakeName                     The name the zLeaf instance shall have (if not the default, which is the hostname of the client)
    */
    void StartZLeaf(const QString *argFakeName = nullptr );
    /*!
    * \brief Opens a browser window on the client
    * @param argURL                     URL to open in clients browser
    */
    void StartClientBrowser( const QString *argURL = nullptr, const bool *argFullscreen = nullptr );
    /*!
    * \brief Closes all browser instances
    */
    void StopClientBrowser();

private:
    const QString &GetzLeafVersion() const { return zLeafVersion; }

    unsigned short int protectedCycles;
    ClientPinger *pinger = nullptr;
    QThread pingerThread;
    state_t state = state_t::UNINITIALIZED;
    QTimer *pingTimer = nullptr;                       //! QTimer used to trigger pings by pinger's ClientPinger instance
    int sessionPort = 0;
    QString zLeafVersion;

private slots:
    void GotStatusChanged( state_t argState );
    void RequestAPing();

signals:
    void PingWanted();
};

}

#endif // CLIENT_H