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#include "socketcontroller.h"
#include "servicenames.h"

SocketController::SocketController(ConnectionType type, QObject *parent)
:   QObject(parent), m_manager(0), m_socket(new QLlcpSocket(this)), m_connectionType(type),
    m_timerId(-1)
{
    connect(m_socket, SIGNAL(connected()), this, SLOT(connected()));
    connect(m_socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
    connect(m_socket, SIGNAL(error(QLlcpSocket::SocketError)),
            this, SLOT(error(QLlcpSocket::SocketError)));
    connect(m_socket, SIGNAL(stateChanged(QLlcpSocket::SocketState)),
            this, SLOT(stateChanged(QLlcpSocket::SocketState)));
    connect(m_socket, SIGNAL(readyRead()), this, SLOT(readyRead()));

    switch (m_connectionType) {
    case StreamConnection:
        m_service = helloServer + streamSuffix;
        qDebug() << "Client connecting to" << m_service;
        m_socket->connectToService(0, m_service);
        break;
    case DatagramConnection:
        m_service = helloServer + datagramSuffix;
        qDebug() << "Client connecting to" << m_service;
        m_socket->connectToService(0, m_service);
        break;
    case BoundSocket:
        m_port = boundSocketPort;
        qDebug() << "Client binding to" << m_port;
        if (!m_socket->bind(m_port))
            qDebug() << "Failed to bind to port" << m_port;
        break;
    case ConnectionlessSocket:
        qDebug() << "Client binding to arbitrary port";
        if (!m_socket->bind(0)) {
            qDebug() << "Failed to bind to arbitrary port";
        } else {
            m_manager = new QNearFieldManager(this);
            connect(m_manager, SIGNAL(targetDetected(QNearFieldTarget*)),
                    this, SLOT(targetDetected(QNearFieldTarget*)));
            connect(m_manager, SIGNAL(targetLost(QNearFieldTarget*)),
                    this, SLOT(targetLost(QNearFieldTarget*)));
            m_manager->startTargetDetection(QNearFieldTarget::NfcForumDevice);
        }
        break;
    default:
        qFatal("Unknown connection type");
    }
}

SocketController::~SocketController()
{
    delete m_socket;
}

void SocketController::connected()
{
    qDebug() << "Client connected";
    const QString data = QLatin1String("HELLO ") + m_service;
    switch (m_connectionType) {
    case StreamConnection:
        m_socket->write(data.toUtf8() + '\n');
        break;
    case DatagramConnection:
        m_socket->writeDatagram(data.toUtf8());
        break;
    default:
        ;
    }
}

void SocketController::disconnected()
{
    qDebug() << "Client disconnected, reconnecting";

    m_socket->connectToService(0, m_service);
}

void SocketController::error(QLlcpSocket::SocketError socketError)
{
    qDebug() << "Client got error:" << socketError;
}

void SocketController::stateChanged(QLlcpSocket::SocketState socketState)
{
    qDebug() << "Client state changed to" << socketState;
}

void SocketController::readyRead()
{
    switch (m_connectionType) {
    case StreamConnection:
        while (m_socket->canReadLine()) {
            const QByteArray line = m_socket->readLine().trimmed();

            qDebug() << "Client read line:" << line;

            if (line == "DISCONNECT") {
                m_socket->disconnectFromService();
                break;
            } else if (line == "CLOSE") {
                m_socket->close();
                break;
            }
        }
        break;
    case DatagramConnection:
        while (m_socket->hasPendingDatagrams()) {
            qint64 size = m_socket->pendingDatagramSize();
            QByteArray data;
            data.resize(size);
            m_socket->readDatagram(data.data(), data.size());

            if (data == "DISCONNECT") {
                m_socket->disconnectFromService();
                break;
            } else if (data == "CLOSE") {
                m_socket->close();
                break;
            }
        }
    case BoundSocket:
    case ConnectionlessSocket:
        while (m_socket->hasPendingDatagrams()) {
            qint64 size = m_socket->pendingDatagramSize();
            QByteArray data;
            data.resize(size);
            m_socket->readDatagram(data.data(), data.size());

            qDebug() << data;
        }
    }
}

void SocketController::targetDetected(QNearFieldTarget *target)
{
    Q_UNUSED(target);

    m_timerId = startTimer(500);
}

void SocketController::targetLost(QNearFieldTarget *target)
{
    Q_UNUSED(target);

    killTimer(m_timerId);
}

void SocketController::timerEvent(QTimerEvent *event)
{
    Q_UNUSED(event);

    m_socket->writeDatagram("Test message", 12, 0, boundSocketPort);
}
