// RTL layout test. Lane GUI.
//
// The GUI DoD asks for "a stub Arabic .ts proves the RTL layout survives". A .ts file on
// its own proves nothing — this is the check with teeth: build the real main window, flip
// the layout direction, and assert (a) the direction propagates to the children and
// (b) a layout we own actually mirrors, by comparing a widget's position LTR vs RTL.

#include <QApplication>
#include <QLabel>
#include <QWidget>
#include <QtTest>

#include "mainwindow/MainWindow.hpp"
#include "rpc/RpcClient.hpp"

using velox::gui::MainWindow;

namespace {

int settledLeftOf(QWidget *w) {
    QCoreApplication::processEvents();
    QTest::qWait(30);
    QCoreApplication::processEvents();
    return w->mapTo(w->window(), QPoint(0, 0)).x();
}

}  // namespace

class TstRtl : public QObject {
    Q_OBJECT

  private slots:
    void directionPropagatesAndLayoutMirrors();
};

void TstRtl::directionPropagatesAndLayoutMirrors() {
    velox::gui::rpc::RpcClient client(QStringLiteral("/nonexistent/velox-rtl-test.sock"));
    MainWindow window(&client);  // never started — the window must build without a daemon
    window.resize(900, 500);

    window.setLayoutDirection(Qt::LeftToRight);
    window.show();

    auto *bannerLabel = window.findChild<QLabel *>(QStringLiteral("offlineBannerLabel"));
    QVERIFY2(bannerLabel != nullptr, "offline banner label not found");
    QVERIFY2(bannerLabel->isVisible(), "offline banner should be visible while disconnected");

    const int leftLtr = settledLeftOf(bannerLabel);

    window.setLayoutDirection(Qt::RightToLeft);

    // Propagation: the window and its central widget must both flip.
    QCOMPARE(window.layoutDirection(), Qt::RightToLeft);
    QVERIFY2(window.centralWidget() != nullptr, "no central widget");
    QCOMPARE(window.centralWidget()->layoutDirection(), Qt::RightToLeft);

    const int leftRtl = settledLeftOf(bannerLabel);

    // The banner is [label][stretch] in a QHBoxLayout we build ourselves. LTR pins the
    // label near x=0; RTL must push it to the right by (roughly) the free space. If the
    // layout ignored direction this delta would be ~0.
    QVERIFY2(leftRtl - leftLtr > 100,
             qPrintable(QStringLiteral("offline banner did not mirror under RTL: "
                                       "label x LTR=%1 RTL=%2")
                            .arg(leftLtr)
                            .arg(leftRtl)));
}

QTEST_MAIN(TstRtl)
#include "tst_rtl.moc"