#include <stdio.h>
#include <WinSock2.h>

#include <QCoreApplication>
#include <QSocketNotifier>

#pragma comment(lib,"ws2_32.lib") //Winsock Library

#include <QObject>

void start_socket() {
    WSADATA wsa;
    SOCKET s;

    if (WSAStartup(MAKEWORD(2,2),&wsa) != 0) {
        printf("WSAStartup Failed. Error Code : %d\n", WSAGetLastError());
        return;
    }

    if((s = socket(AF_INET, SOCK_STREAM, 0 )) == INVALID_SOCKET) {
        printf("Could not create socket : %d\n", WSAGetLastError());
        return;
    }

    int non_block = 1;
    int result = ioctlsocket(s, FIONBIO, (u_long*)&non_block);
    printf("result set blocking: %d (%d)\n", result, WSAGetLastError());

    sockaddr_in clientService;
    clientService.sin_family = AF_INET;
    clientService.sin_addr.s_addr = inet_addr("0.0.0.0");
    clientService.sin_port = htons(17001);

    result = connect(s, (SOCKADDR *) & clientService, sizeof (clientService));
    printf("result connect: %d (%d)\n", result, WSAGetLastError());

    QSocketNotifier* notifierr = new QSocketNotifier(s, QSocketNotifier::Read);
    QObject::connect(notifierr, &QSocketNotifier::activated, [=](){ printf("on read\n"); notifierr->setEnabled(false); });

    QSocketNotifier* notifierw = new QSocketNotifier(s, QSocketNotifier::Write);
    QObject::connect(notifierw, &QSocketNotifier::activated, [=](){ printf("on write\n"); notifierw->setEnabled(false); });

    QSocketNotifier* notifiere = new QSocketNotifier(s, QSocketNotifier::Exception);
    QObject::connect(notifiere, &QSocketNotifier::activated, [=](){ printf("on error\n"); notifiere->setEnabled(false);});
}


int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);
    start_socket();
    return a.exec();
}