#pragma once

#include <QObject>
#include <QQmlEngine>
#include <QRectF>
#include <QString>
#include <QQuickWindow>

// Small facts about the host that QML needs in order to pick window flags,
// plus the input-region call that makes an overlay window click-through.
class PlatformInfo : public QObject
{
    Q_OBJECT
    QML_NAMED_ELEMENT(Platform)
    QML_SINGLETON

    Q_PROPERTY(QString name READ name CONSTANT)
    Q_PROPERTY(bool isX11 READ isX11 CONSTANT)
    Q_PROPERTY(bool isWayland READ isWayland CONSTANT)
    Q_PROPERTY(bool overlayMode READ overlayMode CONSTANT)
    Q_PROPERTY(bool bypassWindowManager READ bypassWindowManager CONSTANT)
    Q_PROPERTY(bool opaqueBackground READ opaqueBackground CONSTANT)

public:
    explicit PlatformInfo(QObject *parent = nullptr);

    QString name() const { return m_name; }
    bool isX11() const { return m_name == QLatin1String("xcb"); }
    bool isWayland() const { return m_name.startsWith(QLatin1String("wayland")); }

    // Wayland forbids a client from placing its own window, so there the cat
    // lives inside one screen-filling overlay and only moves within it.
    // TNCAT_OVERLAY=1 forces the same mode elsewhere.
    bool overlayMode() const { return m_overlay || isWayland(); }

    // TNCAT_X11_BYPASS=1 turns the cat into an override-redirect window.
    // Useful on window managers that refuse to keep a Qt::Tool window on top.
    bool bypassWindowManager() const { return m_bypass; }

    // TNCAT_OPAQUE=1 paints a solid background instead of relying on a
    // compositor. Without compositing X11 renders transparency as black.
    bool opaqueBackground() const { return m_opaque; }

    // Restricts the window's input region to one rectangle so clicks land on
    // whatever is behind the rest of the overlay. Implemented by the X11 and
    // Wayland plugins; a no-op on platforms that ignore the mask.
    Q_INVOKABLE void setInputRegion(QQuickWindow *window, const QRectF &region);

private:
    QString m_name;
    bool m_overlay = false;
    bool m_bypass = false;
    bool m_opaque = false;
};