#include <cstdint>

#include <poppler-qt6.h>

#include <QtCore/QBuffer>

static void dummy_error_function(const QString &message, const QVariant &closure)

{

    Q_UNUSED(message)

    Q_UNUSED(closure)

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    Poppler::setDebugErrorFunction(dummy_error_function, QVariant());

    const QFont font(QStringLiteral("Helvetica"), 20);

    const QColor color = QColor::fromRgb(0xAB, 0xCD, 0xEF);

    QByteArray in_data = QByteArray::fromRawData((const char *)data, size);

    std::unique_ptr<Poppler::Document> doc = Poppler::Document::loadFromData(in_data);

    if (!doc || doc->isLocked()) {

        return 0;

    }

    for (int i = 0; i < doc->numPages(); i++) {

        std::unique_ptr<Poppler::Page> p = doc->page(i);

        if (!p) {

            continue;

        }

        Poppler::TextAnnotation *ann = new Poppler::TextAnnotation(Poppler::TextAnnotation::InPlace);

        ann->setTextFont(font);

        ann->setTextColor(color);

        ann->setBoundary(QRectF(0.1, 0.1, 0.2, 0.2));

        ann->setContents(QString::fromUtf8(in_data));

        p->addAnnotation(ann);

        QBuffer buffer;

        buffer.open(QIODevice::WriteOnly);

        std::unique_ptr<Poppler::PDFConverter> conv(doc->pdfConverter());

        conv->setOutputDevice(&buffer);

        conv->setPDFOptions(Poppler::PDFConverter::WithChanges);

        conv->convert();

        buffer.close();

        delete ann;

    }

    return 0;

}