/**
  * AVS-Interface for VideoOverlayManagement
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by hjl, SLSE, 2016-06-24
  */

#pragma once

#include <QtCore/QObject>
#include <QtNetwork/QHostAddress>
#include "logger.h"

// Forwarddeclarations
class QTcpSocket;
class QTimer;

namespace VideoOverlayManagement
{

enum class AvsIfConnectionState
{
  Undefined = 0,
  Connected,
  Disconnected,
  TryReconnect,
  ConnectionError,
};

enum class AvsCmdState
{
  Ok                   = 200,
  KeepAlive            = 298,
  BadArguments         = 402,
  CommandNotStateValid = 455
};


class AvsInterface
  : public QObject
{
  Q_OBJECT
public:
  /**
    * Constructor connect to plugboard
    * @param[in] enableTryReconnect  if true, try reconnection
    * @param[in] parent              Pointer to parent qObject
    */
  AvsInterface(bool enableTryReconnect, QObject *parent = nullptr);

  ~AvsInterface();

  /**
    * Connect to AVS RCP_AVA
    * @param[in] hostName        Hostname or Ip address to get access to AVS
    * @param[in] port            Ip port to get access to AVS
    */
  void start(const QString &hostName, quint16 port);

  AvsIfConnectionState getAvsIfState()
  {
    return m_avsIfConnectionState;
  }

  /**
    * Send data to connected TcpSocket
    * @param[in] qba   Data to be transfered completed with "\r\n"
    */
  bool sendCommand(const QByteArray &qba);


Q_SIGNALS:
  /**
    * Signals current AVS connection state
    */
  void avsIfConnectionState(AvsIfConnectionState);
  /**
    * Signals current AVS command state
    */
  void avsCmdState(AvsCmdState);

  /**
    * Signals an missing AVS keep-alive
    * If the parameter 'enableTryReconnect' is set
    * the connection attempting to restore automatically
    */
  void avsKeepAliveTimeout();

  /**
    * Define the signal/slots connects uesd for TcpSocket
    */
protected Q_SLOTS:
  void doConnect();
  void onConnected();
  void onDisonnected();
  void onError(QAbstractSocket::SocketError);
  void onReadyRead();
  void onAvsKeepAliveTimeout();

private: // methode
  void tryReconnect();

private: // attributes
  QString m_hostName;           ///< Hostname or Ip address to get access to AVS
  QString m_ipAddressDNS;       ///< DNS IP address of AVS
  quint16 m_hostPort;           ///< Ip port to get access to AVS
  qint32 m_waitTime;            ///< delay before try reconnection
  bool m_enableTryReconnect;    ///< if true, enables try reconnection
  bool m_tryReconnect;          ///< if true, try reconnection

  QTimer *m_avsKeepAliveTimer;  ///< AVS keep-alive timer
  qint32 m_keepAliveTime;       ///< AVS keep-alive time intervall in msec

  AvsIfConnectionState m_avsIfConnectionState;      ///< AVS Interface connection state

  QTcpSocket  *m_socket;        ///< pointer to tcpsocket object

  QByteArray m_buffer;          ///< data buffer to hold incoming data form tcpsocket
  NGL::INGLLogger  &m_logger;   ///< Interface to the Logging-Facility

};

} // namespace VideoOverlayManagement