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* GNU Lesser General Public License Usage
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#include "tcpserver.h"
#include "extern-plugininfo.h"
#include <QNetworkInterface>


TcpServer::TcpServer(const QHostAddress address, const quint16 &port, QObject *parent) :
    QObject(parent)
{
    m_tcpServer = new QTcpServer(this);
    connect(m_tcpServer, &QTcpServer::newConnection, this, &TcpServer::newConnection);
    qDebug(dcTCPCommander()) << "TCP Server on Port: " << port << "Address: " << address.toString();
    if (!m_tcpServer->listen(address, port)) {
        qWarning(dcTCPCommander()) << "Unable to start the server: " << m_tcpServer->errorString();
        return;
    }
}

TcpServer::TcpServer(const quint16 &port, QObject *parent) :
    QObject(parent)
{
    m_tcpServer = new QTcpServer(this);
    connect(m_tcpServer, &QTcpServer::newConnection, this, &TcpServer::newConnection);
    qDebug(dcTCPCommander()) << "TCP Server on Port: " << port;
    if (!m_tcpServer->listen(QHostAddress::Any, port)) {
        qWarning(dcTCPCommander()) << "Unable to start the server: " << m_tcpServer->errorString();
        return;
    }
}

TcpServer::~TcpServer()
{
}

bool TcpServer::isValid()
{
    return m_tcpServer->isListening();
}

QHostAddress TcpServer::serverAddress()
{
    return m_tcpServer->serverAddress();
}

int TcpServer::serverPort()
{
    return m_tcpServer->serverPort();
}

int TcpServer::connectionCount()
{
    return m_clients.count();
}

bool TcpServer::sendCommand(const QString &clientIp, const QByteArray &data)
{
    bool success = false;
    QHostAddress address(clientIp);

    foreach (QTcpSocket *client, m_clients) {
        if (address == QHostAddress(QHostAddress::AnyIPv4) || client->peerAddress() == address) {
            qint64 len = client->write(data);
            if (len == data.length()) {
                success = true;
            }
        }
    }
    qCWarning(dcTCPCommander()) << "No client matching the destination IP" << address.toString();
    return success;
}

void TcpServer::newConnection()
{
    qDebug(dcTCPCommander()) << "TCP Server new Connection request";
    QTcpSocket *socket = m_tcpServer->nextPendingConnection();
    socket->flush();

    m_clients.append(socket);
    emit connectionCountChanged(m_clients.count());
    connect(socket, &QTcpSocket::disconnected, this, &TcpServer::onDisconnected);
    connect(socket, &QTcpSocket::readyRead, this, &TcpServer::readData);
    // Note: error signal will be interpreted as function, not as signal in C++11
    connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(onError(QAbstractSocket::SocketError)));
}

void TcpServer::onDisconnected()
{
    QTcpSocket *client = qobject_cast<QTcpSocket*>(sender());
    qDebug(dcTCPCommander()) << "TCP client disconnected";
    m_clients.removeAll(client);
    emit connectionCountChanged(m_clients.count());
}

void TcpServer::readData()
{
    QTcpSocket *socket = static_cast<QTcpSocket *>(sender());
    QByteArray data = socket->readAll();
    qDebug(dcTCPCommander()) << "TCP Server data received: " << data;
    socket->write("OK\n");
    emit commandReceived(socket->peerAddress().toString(), data);
}

void TcpServer::onError(QAbstractSocket::SocketError error)
{
    QTcpSocket *socket = static_cast<QTcpSocket *>(sender());
    qWarning(dcTCPCommander()) << "Socket Error" << socket->errorString() << error;
}
