#include "torrentsession.h"
#include "mainscreen.h"

#include <sstream>

TorrentSession::TorrentSession(SearchItem it, std::filesystem::path download_path, QObject *parent)
{
    this->item = new SearchItem(it);
    this->download_path = download_path;



}

int TorrentSession::start()
{
    auto pid = fork();
    if(pid != 0) {
        qDebug() << "Process id: " << getpid() << "forked.";
        return pid;
    }
    qDebug() << "Process id: " << getpid() <<
        "created for torrent session with download path: " << download_path.string();

    manager = new SocketManager();
    socket_manager_thread = new QThread(this);
    manager->moveToThread(socket_manager_thread);
    socket_manager_thread->start();
    connect(this, &TorrentSession::startSocketManager, manager, &SocketManager::start);
    connect(this, &TorrentSession::sendStatusSignalToSocketManager, manager, &SocketManager::statusSignalFromTorrentSession);
    connect(manager, &SocketManager::status, this, &TorrentSession::sendStatus);
    connect(manager, &SocketManager::pause, this, &TorrentSession::pause);
    connect(manager, &SocketManager::resume, this, &TorrentSession::resume);
    connect(manager, &SocketManager::remove, this, &TorrentSession::remove);

    emit startSocketManager();
    connect(&start_timer, &QTimer::timeout, this, &TorrentSession::launchSession);
    start_timer.setInterval(300);
    start_timer.setSingleShot(true);
    start_timer.start();
    return pid;
}

void TorrentSession::sendStatus()
{

}

void TorrentSession::pause()
{

}

void TorrentSession::resume()
{

}

void TorrentSession::remove()
{

}

//libtorrent stuff starts here.
void TorrentSession::launchSession()
{

}


SocketManager::SocketManager(QObject *parent)
{

}

void SocketManager::start()
{
    server = new QLocalServer(this);
    connect(server, &QLocalServer::newConnection, this, &SocketManager::addConnection);
    auto unique_path = testDir("/tmp/nekodl", ".sock");
    bool f = server->listen(QString::fromStdString(unique_path.string()));
    if(!f) {
        qDebug() << "Failed to start server";
    }
}

void SocketManager::statusSignalFromTorrentSession(QByteArray data)
{
    if(socket &&  socket->isOpen() && socket->isValid()) {
        socket->write(data);
        socket->flush();
    }
}

void SocketManager::addConnection()
{
    if(server->hasPendingConnections()) {
        if(socket) {
            socket->deleteLater();
        }
        socket = server->nextPendingConnection();
        connect(socket, &QLocalSocket::readyRead, this, &SocketManager::commandFromClient);
    }
}

void SocketManager::commandFromClient()
{
    if(socket) {
        QByteArray big_data;
        while(socket->bytesAvailable()) {
            auto data = socket->readAll();
            big_data += data;
        }
        QString data(big_data);
        sendSignalToTorrentSession(data);
    }
}

void SocketManager::sendSignalToTorrentSession(QString command)
{
    if(command == "status") {
        emit status();
    }
    if(command == "pause") {
        emit pause();
    }
    if(command == "resume") {
        emit resume();
    }
    if(command == "remove") {
        emit remove();
    }
}

std::string SocketManager::numToStr(int num)
{
    std::stringstream ss;
    ss << num;
    return ss.str();
}

std::filesystem::path SocketManager::testDir(std::string file_name, std::string file_format)
{
    int i = 1;
    while(true) {
        std::filesystem::path final_path = std::filesystem::path(file_name + "_" + numToStr(i++) + file_format);
        qDebug() << "Checking path: " << final_path.string();
        if(!std::filesystem::exists(final_path)) {
            return final_path;
        }
    }
}