#ifndef SERVERDISCOVERY_H
#define SERVERDISCOVERY_H

#include <QObject>
#include <QUdpSocket>
#include <QTimer>
#include "../../shared/networkmessage.h"

class ServerDiscovery : public QObject
{
		Q_OBJECT

	public:
		enum class ErrorType{
			InvalidIpList,
			InvalidHash
		};

		explicit ServerDiscovery(QObject *parent = 0);
		~ServerDiscovery();

		void start(const QByteArray& sessionName);
		void stop();
		inline bool isActive(){ return _discoveryTimer.isActive(); }

	private:
		QTimer _discoveryTimer;
		int    _hashErrorCount;
		int    _ipErrorCount;
		QByteArray _nameBytes;
		QByteArray _salt2;
		QUdpSocket _discoverySocket;
		NetworkMessage _packet;

		static const int UDPBUFSIZ = 9000;
		static const int SALT_LEN = 18;

public:
	signals:
		void serverDetected(const QString& host, const quint16 port, const QByteArray& sessionName, const QByteArray& certHash);
		void error(ErrorType e, int count);

	public slots:

	private slots:
		void doDiscovery();
		void onUdpReadyRead();

};

#endif // SERVERDISCOVERY_H