/**
  * @RDE_HEADER@
  * The ClientConnection class represents a connection to a single client.
  * $Id$
  * $HeadURL$
  * $Author$
  * Created by Hannes Baeuerle, SLSE, 2016-08-25
  */
#pragma once

#include <QtCore/QThread>
#include <QtCore/QQueue>

#include "reply_message.h"
#include "logger.h"
#include <LtsWebSocket/ltswebsocketserver_export.h>

class QWebSocket;

namespace LtsWebSocket
{

/**
 * @brief The ClientConnection class represents a connection to a single client
 */
class LTSWEBSOCKETSERVER_EXPORT ClientConnection
  : public QThread
  , public ReplyHandler
{
  Q_OBJECT
public:
  /**
   * @brief ClientConnection Constructor
   * @param socket Pointer to a QWebSocket Object. Should be QWebSocketServer::nextPendingConnection()
   * @param parent QObject parent
   */
  explicit ClientConnection(QWebSocket *socket, QObject *parent = nullptr);


  /**
   * @brief ~ClientConnection Destructor
   */
  ~ClientConnection();

  /**
   * @brief init Initialises the ClientConnection
   * @return True on success, otherwise false
   */
  bool init();

  /**
   * @brief writeTextMessage Add a message to a queue to be sent to the client
   * @param message Message which is queued
   */
  void addReply(ReplyMessage *message) override;

  QWebSocket *webSocket() { return m_socket; }
signals:
  /**
   * @brief newTextMessage Emitted when a new text message arrives at the associated socket
   * @param message The new message
   */
  void newTextMessage(ClientConnection *client, const QString &message);

  /**
   * @brief disconnected Emitted when a client disconnects
   * @param client The client
   */
  void disconnected(ClientConnection *client);


private slots:
  void onNewTextMessageFromSocket(const QString &message);
  void sendMessagesFromQueue();
  void onSocketDisconnect();
private: // methods
  /**
   * @brief sendMessages Runs in an own thread and constantly tries to send
   * queued messages
   */
  void sendMessages();

private: // attributes
  QWebSocket *m_socket;
  QQueue<ReplyMessage *> m_messageQueue;

  LOGGER_T m_logger;


}; // class ClientConnection
} // namespace LtsWebSocket