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#ifndef SPEEDWIREDISCOVERY_H
#define SPEEDWIREDISCOVERY_H

#include <QTimer>
#include <QObject>
#include <QUdpSocket>

#include <network/networkdevicediscovery.h>

#include "speedwire.h"
#include "speedwireinterface.h"

class SpeedwireDiscovery : public QObject
{
    Q_OBJECT
public:
    typedef struct SpeedwireDiscoveryResult {
        QHostAddress address;
        NetworkDeviceInfo networkDeviceInfo;
        SpeedwireInterface::DeviceType deviceType = SpeedwireInterface::DeviceTypeUnknown;
        quint16 modelId = 0;
        quint32 serialNumber = 0;
    } SpeedwireDiscoveryResult;

    explicit SpeedwireDiscovery(NetworkDeviceDiscovery *networkDeviceDiscovery, QObject *parent = nullptr);
    ~SpeedwireDiscovery();

    bool initialize(SpeedwireInterface::DeviceType deviceType = SpeedwireInterface::DeviceTypeUnknown);
    bool initialized() const;

    bool startDiscovery();
    bool discoveryRunning() const;

    QList<SpeedwireDiscoveryResult> discoveryResult() const;

signals:
    void discoveryFinished();

private:
    NetworkDeviceDiscovery *m_networkDeviceDiscovery = nullptr;
    SpeedwireInterface::DeviceType m_deviceType = SpeedwireInterface::DeviceTypeUnknown;
    QUdpSocket *m_multicastSocket = nullptr;
    QUdpSocket *m_unicastSocket = nullptr;
    QHostAddress m_multicastAddress =  Speedwire::multicastAddress();
    quint16 m_port = Speedwire::port();
    bool m_initialized = false;

    // Discovery
    QTimer m_multicastSearchRequestTimer;
    NetworkDeviceInfos m_networkDeviceInfos;
    QHash<QHostAddress, SpeedwireDiscoveryResult> m_results;

    bool m_multicastRunning = false;
    bool m_unicastRunning = false;

    bool setupMulticastSocket();
    void startMulticastDiscovery();

    bool setupUnicastSocket();
    void startUnicastDiscovery();
    ;
    void sendUnicastDiscoveryRequest(const QHostAddress &targetHostAddress);

private slots:
    void readPendingDatagramsMulticast();
    void readPendingDatagramsUnicast();
    void onSocketError(QAbstractSocket::SocketError error);
    void onSocketStateChanged(QAbstractSocket::SocketState socketState);

    void processDatagram(const QHostAddress &senderAddress, quint16 senderPort, const QByteArray &datagram);

    void sendDiscoveryRequest();

    void evaluateDiscoveryFinished();

    void finishDiscovery();

};

#endif // SPEEDWIREDISCOVERY_H