#include <cstdlib>
#include <nng/nng.h>
#include <nng/protocol/pubsub0/pub.h>
#include <nng/protocol/pubsub0/sub.h>
#include <spdlog/spdlog.h>
#include <sys/types.h>
#include <unistd.h>

void dp_nng_fatal(const std::string &msg, int rv)
{
    spdlog::error("{}: {}", msg, nng_strerror(rv));
    abort();
}

void dp_errno_fatal(const std::string &msg)
{
    spdlog::error("{}: {}", msg, strerror(errno));
    abort();
}

nng_socket make_ctrl_pub(const char *url)
{
    nng_socket sock;

    if (auto res = nng_pub0_open(&sock))
        dp_nng_fatal("make_ctrl_pub/nng_pub0_open", res);

    if (auto res = nng_listen(sock, url, nullptr, 0))
        dp_nng_fatal("make_ctrl_pub/nng_listen", res);

    return sock;
}

nng_socket make_ctrl_sub(const char *url)
{
    nng_socket sock;

    if (auto res = nng_sub0_open(&sock))
        dp_nng_fatal("make_ctrl_pub/nng_sub0_open", res);

    if (auto res = nng_listen(sock, url, nullptr, 0))
        dp_nng_fatal("make_ctrl_sub/nng_listen", res);

    return sock;
}

nng_socket make_doom_pub(const char *url)
{
}

nng_socket make_doom_sub(const char *url)
{
}

static const char *CtrlUrl = "ipc://666_ctrl.socket";
static const char *DoomUrl = "ipc://666_doom.socket";
static const size_t NumDooms = 2;

int run_doom(size_t id)
{
    spdlog::debug("doom#{} running", id);
    return 0;
}

int main(int argc, char *argv[])
{
    spdlog::set_level(spdlog::level::debug);
    spdlog::set_pattern("[%H:%M:%S.%e] [pid=%P] [%^%l%$] %v");
    spdlog::info("Hello, doomed world!");

    for (size_t i=0; i<NumDooms; ++i)
    {
        auto res = fork();

        if (res == -1)
            dp_errno_fatal("spawn doom");
        else if (res == 0)
            return run_doom(i);
        else
            spdlog::debug("spawned doom#{}", i);
    }

    return 0;

    auto ctrlPubSock = make_ctrl_pub(CtrlUrl);
    auto ctrlSubSock = make_ctrl_sub(DoomUrl);

    if (auto res = nng_send(ctrlPubSock, (void *)"foobar", 7, 0))
        dp_nng_fatal("ctrl send", res);


    nng_close(ctrlPubSock);
    nng_close(ctrlSubSock);
    return 0;
}