// SPDX-License-Identifier: GPL-3.0-or-later

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright (C) 2013 - 2024, nymea GmbH
* Copyright (C) 2024 - 2025, chargebyte austria GmbH
*
* This file is part of nymea-plugins.
*
* nymea-plugins is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nymea-plugins is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with nymea-plugins. If not, see <https://www.gnu.org/licenses/>.
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#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);
#if QT_VERSION >= QT_VERSION_CHECK(5 , 15, 0)
    connect(m_udpSocket, &QUdpSocket::errorOccurred, this, &KeContactDataLayer::onSocketError);
#else
    connect(m_udpSocket, SIGNAL(error(QAbstractSocket::SocketError)),this, SLOT(onSocketError(QAbstractSocket::SocketError)));
#endif
}

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;
}