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* Copyright 2013 - 2021, nymea GmbH
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* under https://nymea.io/license
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* GNU Lesser General Public License Usage
* Alternatively, this project may be redistributed and/or modified under the
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#include "kecontactdatalayer.h"
#include "extern-plugininfo.h"

KeContactDataLayer::KeContactDataLayer(QObject *parent) : QObject(parent)
{
    qCDebug(dcKeba()) << "KeContactDataLayer: Creating UDP socket";
    m_udpSocket = new QUdpSocket(this);
    connect(m_udpSocket, &QUdpSocket::readyRead, this, &KeContactDataLayer::readPendingDatagrams);
    connect(m_udpSocket, &QUdpSocket::stateChanged, this, &KeContactDataLayer::onSocketStateChanged);
    connect(m_udpSocket, SIGNAL(error(QAbstractSocket::SocketError)),this, SLOT(onSocketError(QAbstractSocket::SocketError)));
}

KeContactDataLayer::~KeContactDataLayer()
{
    qCDebug(dcKeba()) << "KeContactDataLayer: Deleting UDP socket";
}

bool KeContactDataLayer::init()
{
    m_udpSocket->close();
    m_initialized = false;

    if (!m_udpSocket->bind(QHostAddress::AnyIPv4, m_port, QAbstractSocket::ShareAddress)) {
        qCWarning(dcKeba()) << "KeContactDataLayer: Cannot bind to port" << m_port;
        return false;
    }

    m_initialized = true;
    return true;
}

bool KeContactDataLayer::initialized() const
{
    return m_initialized;
}

void KeContactDataLayer::write(const QHostAddress &address, const QByteArray &data)
{
    qCDebug(dcKeba()) << "KeContactDataLayer: -->" << address.toString() << data;
    m_udpSocket->writeDatagram(data, address, m_port);
}

void KeContactDataLayer::readPendingDatagrams()
{
    QUdpSocket *socket= qobject_cast<QUdpSocket*>(sender());

    QByteArray datagram;
    QHostAddress senderAddress;
    quint16 senderPort;

    while (socket->hasPendingDatagrams()) {
        datagram.resize(socket->pendingDatagramSize());
        socket->readDatagram(datagram.data(), datagram.size(), &senderAddress, &senderPort);
        qCDebug(dcKeba()) << "KeContactDataLayer: <--" << senderAddress.toString() << datagram;
        emit datagramReceived(senderAddress, datagram);
    }
}

void KeContactDataLayer::onSocketError(QAbstractSocket::SocketError error)
{
    qCWarning(dcKeba()) << "KeContactDataLayer: Socket error" << error;
}

void KeContactDataLayer::onSocketStateChanged(QAbstractSocket::SocketState socketState)
{
    qCDebug(dcKeba()) << "KeContactDataLayer: Socket state changed" << socketState;
}