#include <QCoreApplication>
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QProcess>
#include <QDir>
#include <QFileInfo>
#include <QObject>
#include <QDebug>

#include <csignal>
#include <sys/prctl.h>

// Resolve the spike root by walking up from the running binary
// until we find a directory containing Caddyfile + bin/frankenphp.
static QString resolveSpikeRoot()
{
    QDir d(QCoreApplication::applicationDirPath());
    for (int i = 0; i < 6; ++i) {
        if (QFileInfo(d.filePath("Caddyfile")).exists() &&
            QFileInfo(d.filePath("bin/frankenphp")).exists()) {
            return d.absolutePath();
        }
        if (!d.cdUp()) break;
    }
    qWarning() << "Could not locate spike root from"
               << QCoreApplication::applicationDirPath();
    return QCoreApplication::applicationDirPath();
}

// SIGTERM / SIGINT → graceful Qt quit so aboutToQuit cleanup runs.
static void installSignalHandlers()
{
    auto handler = +[](int) { QCoreApplication::quit(); };
    std::signal(SIGTERM, handler);
    std::signal(SIGINT,  handler);
}

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
    installSignalHandlers();

    const QString spikeRoot = resolveSpikeRoot();
    qInfo() << "spike root:" << spikeRoot;

    QProcess franken;
    franken.setProgram(spikeRoot + "/bin/frankenphp");
    franken.setArguments({"run", "--config", spikeRoot + "/Caddyfile"});
    franken.setWorkingDirectory(spikeRoot);
    franken.setProcessChannelMode(QProcess::ForwardedChannels);

    // Linux belt-and-suspenders: ask the kernel to SIGTERM the child
    // when this process dies, regardless of how (crash, kill -9, etc.).
    franken.setChildProcessModifier([] {
        prctl(PR_SET_PDEATHSIG, SIGTERM);
    });

    franken.start();

    QObject::connect(&app, &QCoreApplication::aboutToQuit, [&]() {
        if (franken.state() == QProcess::NotRunning) return;
        franken.terminate();
        if (!franken.waitForFinished(2000)) franken.kill();
    });

    QQmlApplicationEngine engine;
    engine.loadFromModule("Spike", "Main");

    if (engine.rootObjects().isEmpty()) return -1;

    return app.exec();
}