#include <QApplication>
#include <QWidget>
#include <QTextEdit>
#include <QProcess>
#include <QVBoxLayout>
#include <QString>
#include <QFont>
#include <QScreen>
#include <QScrollBar>
#include <QGuiApplication>

#include <qpa/qplatformnativeinterface.h>
#include <wayland-client-protocol.h>
#include <QPlatformSurfaceEvent>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    
    if (argc < 2) {
        printf("Usage: %s '<command>'\n", argv[0]);
        return 1;
    }

    QWidget window;
    window.setWindowTitle("Shell Command Output Viewer");
    window.setStyleSheet("background-color: black;");

    QPlatformNativeInterface *native = QGuiApplication::platformNativeInterface();
    wl_surface *s = reinterpret_cast<wl_surface*>(native->nativeResourceForWindow("surface", window.windowHandle()));
    wl_surface_set_buffer_transform(s, WL_OUTPUT_TRANSFORM_270);
    wl_surface_commit(s);
    void *egl = native->nativeResourceForWindow("egldisplay", window.windowHandle());
    assert(egl != nullptr);
    
    window.showFullScreen();

    QVBoxLayout *layout = new QVBoxLayout(&window);
    QTextEdit *outputDisplay = new QTextEdit;
    outputDisplay->setFont(QFont("Consolas", 32));
    outputDisplay->setReadOnly(true);
    outputDisplay->setStyleSheet("color: white; background-color: black;");
    layout->addWidget(outputDisplay);

    QProcess process;
    QObject::connect(&process, &QProcess::readyReadStandardOutput, [&]() {
        static QStringList lines;
        QString output = process.readAllStandardOutput();
        lines += output.split("\n", QString::SkipEmptyParts);
        while (lines.size() > 100) {
            lines.removeFirst();
        }
        outputDisplay->setPlainText(lines.join("\n"));
        outputDisplay->verticalScrollBar()->setValue(outputDisplay->verticalScrollBar()->maximum());
    });

    QObject::connect(&process, QOverload<int, QProcess::ExitStatus>::of(&QProcess::finished), [&]() {
        app.quit();
    });

    QString command = argv[1];
    process.start(QString("bash -c \"%1\"").arg(command));

    return app.exec();
}