#include <QCoreApplication>
#include <QCommandLineParser>
#include <QDir>
#include <QSettings>

#include <stdarg.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mount.h>

#include "archivemanager.h"
#include "database.h"
#include "fusestuff.h"
#include "fsproxy.h"
#include "signalhandler.h"

QDebug operator<<(QDebug debug, const ModLibrary &c)
{
    QDebugStateSaver saver(debug);
    debug.nospace() << "(ModLibrary:" << c.m_id << ", " << c.m_filename << ')';

    return debug;
}

QDebug operator<<(QDebug debug, const ModEntry &c)
{
    QDebugStateSaver saver(debug);
    debug.nospace() << "(ModEntry:" << c.m_id << ", " << c.m_archivePath << ", " << c.m_installedPath << ')';

    return debug;
}

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    app.setOrganizationDomain("org.oneill");
    app.setOrganizationName("Quickmod");
    app.setApplicationName("quickmod");
    app.setApplicationVersion("1.0");

    QCommandLineParser parser;
    parser.setApplicationDescription("FUSE-based mod-mounter for QuickMod");
    parser.addHelpOption();
    parser.addVersionOption();
    parser.addPositionalArgument("game", QCoreApplication::translate("main", "Name of the game itself. Eg: \"Fallout 4\""));
    parser.addPositionalArgument("target", QCoreApplication::translate("main", "Full path to target mountpoint"));
    parser.addPositionalArgument("profile", QCoreApplication::translate("main", "Profile ID"));

    // A boolean option with a single name (-l)
    QCommandLineOption showMountsOption("l", QCoreApplication::translate("main", "Show currently mounted games"));
    parser.addOption(showMountsOption);

    parser.process(app);

    bool force = parser.isSet(showMountsOption);
    if( force )
    {
        printf("This is where I'd list my currently mounted games. Unimplemented. Sowwy.\n");
        return 0;
    }

    const QStringList args = parser.positionalArguments();
    if( args.length() < 2 )
    {
        parser.showHelp(-1);
        return -1;
    }

    QString gamename = args.at(0);
    QString targetdir = args.at(1);
    int profileId = args.at(2).toInt();
    
    // Lazy unmount in case we were mounted and ... crashed, or who knows:
    ::umount2( targetdir.toStdString().c_str(), MNT_DETACH );

    QSettings s;
    s.beginGroup(gamename);
    QString dbpath = s.value("dbPath").toString();
    QString gamedir = s.value("gamePath").toString();
    QString modsdir = s.value("modsPath").toString();

    Database db;
    if( !db.open(dbpath) )
        return -1;

    FSProxy proxy;
    proxy.setup(&db, profileId, gamename, gamedir);

    ArchiveManager manager(&db, modsdir, profileId);

    SignalHandler sh;
    QObject::connect( &sh, &SignalHandler::hupSignalReceived, &manager, &ArchiveManager::reloadArchives );
    QObject::connect( &sh, &SignalHandler::hupSignalReceived, &proxy, &FSProxy::reload );
    sh.setup_unix_signal_handlers();

    qmfuse_set_archive(&manager);
    qmfuse_set_proxy(&proxy);
    qmfuse_set_database(&db);
    QObject::connect( &sh, &SignalHandler::hupSignalReceived, &sh, []() {
        qmfuse_reset();
    });

    int fuse_fd = qmfuse_main(targetdir.toStdString().c_str());
    QSocketNotifier fuse_notifier(fuse_fd, QSocketNotifier::Read);
    QObject::connect( &fuse_notifier, &QSocketNotifier::activated, &sh, [&fuse_notifier, &app](){
        int ret;
        do {
            ret = qmfuse_pump();
        } while(ret > 0);

        if( ret < 0 ) {
            fuse_notifier.setEnabled(false);
            app.quit();
        }
    } );

    return app.exec();
    //return qmfuse_main(targetdir.toStdString().c_str());
    //return qmfuse_main(argc, argv);
}