#include "NetworkManager.h"
#include "logging/Logger.h"

#include <event2/event.h>
#include <event2/thread.h>

namespace Feather::Log::Channels
{
    Log::ChannelID LibEvent = Log::Logger::Instance().RegisterChannel("libevent");
}

namespace Feather::Network
{
    namespace
    {
        void LogCallback(int severity, const char* msg)
        {
            Log::Msg(Log::Channels::LibEvent, Log::Level::Info, msg);
        }
    }

    NetworkManager::NetworkManager()
    {
#ifdef _WIN32
        WSADATA wsa_data = {};
        WSAStartup(MAKEWORD(2, 2), &wsa_data);
#endif

        event_set_log_callback(LogCallback);

#if defined(EVTHREAD_USE_WINDOWS_THREADS_IMPLEMENTED)
        evthread_use_windows_threads();
#elif defined(EVTHREAD_USE_PTHREADS_IMPLEMENTED)
        evthread_use_pthreads();
#else
# error No threading implemented for EVTHREAD
#endif
        m_eventBase = event_base_new();
        m_eventThread = std::thread([]() { NetworkManager::Instance().EventLoop(); });
    }

    NetworkManager::~NetworkManager() {
        event_base_loopbreak(m_eventBase);
        m_eventThread.join();

        event_base_free(m_eventBase);
        libevent_global_shutdown();

#ifdef _WIN32
        WSACleanup();
#endif
    }

    static NetworkManager s_networkManager;

    NetworkManager& NetworkManager::Instance()
    {
        return s_networkManager;
    }

    void NetworkManager::EventLoop()
    {
        event_base_loop(m_eventBase, EVLOOP_NO_EXIT_ON_EMPTY);
    }
}