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#ifndef QWAYLANDDISPLAY_H
#define QWAYLANDDISPLAY_H

#include <QtCore/QObject>
#include <QtCore/QRect>

#include <QtCore/QWaitCondition>

#include <wayland-client.h>

class QAbstractEventDispatcher;
class QWaylandInputDevice;
class QSocketNotifier;
class QWaylandBuffer;
class QPlatformScreen;
class QWaylandScreen;
class QWaylandGLIntegration;
class QWaylandWindowManagerIntegration;
class QWaylandDataDeviceManager;
class QWaylandShell;
class QWaylandSurfaceExtension;
class QWaylandSubSurfaceExtension;
class QWaylandOutputExtension;
class QWaylandTouchExtension;
class QWaylandQtKeyExtension;

typedef void (*RegistryListener)(void *data,
                                 struct wl_registry *registry,
                                 uint32_t id,
                                 const char *interface,
                                 uint32_t version);

class QWaylandDisplay : public QObject {
    Q_OBJECT

public:
    QWaylandDisplay(void);
    ~QWaylandDisplay(void);

    QList<QPlatformScreen *> screens() const { return mScreens; }

    QWaylandScreen *screenForOutput(struct wl_output *output) const;

    struct wl_surface *createSurface(void *handle);

#ifdef QT_WAYLAND_GL_SUPPORT
    QWaylandGLIntegration *eglIntegration();
#endif

#ifdef QT_WAYLAND_WINDOWMANAGER_SUPPORT
    QWaylandWindowManagerIntegration *windowManagerIntegration();
#endif

    void setCursor(wl_surface *surface, int32_t x, int32_t y);

    struct wl_display *wl_display() const { return mDisplay; }
    struct wl_registry *wl_registry() const { return mRegistry; }
    struct wl_compositor *wl_compositor() const { return mCompositor; }

    QWaylandShell *shell() const { return mShell; }

    QList<QWaylandInputDevice *> inputDevices() const { return mInputDevices; }

    QWaylandInputDevice *lastKeyboardFocusInputDevice() const;
    void setLastKeyboardFocusInputDevice(QWaylandInputDevice *device);

    QWaylandDataDeviceManager *dndSelectionHandler() const { return mDndSelectionHandler; }

    QWaylandSurfaceExtension *windowExtension() const { return mWindowExtension; }
    QWaylandSubSurfaceExtension *subSurfaceExtension() const { return mSubSurfaceExtension; }
    QWaylandOutputExtension *outputExtension() const { return mOutputExtension; }
    QWaylandTouchExtension *touchExtension() const { return mTouchExtension; }

    /* wl_registry_add_listener does not add but rather sets a listener, so this function is used
     * to enable many listeners at once. */
    void addRegistryListener(RegistryListener listener, void *data);

    struct wl_shm *shm() const { return mShm; }

    static uint32_t currentTimeMillisec();

    void forceRoundTrip();

public slots:
    void createNewScreen(struct wl_output *output);
    void readEvents();
    void blockingReadEvents();
    void flushRequests();

private:
    void waitForScreens();
    void displayHandleGlobal(uint32_t id,
                             const QByteArray &interface,
                             uint32_t version);

    struct Listener {
        RegistryListener listener;
        void *data;
    };

    struct wl_display *mDisplay;
    struct wl_registry *mRegistry;
    struct wl_compositor *mCompositor;
    struct wl_shm *mShm;
    QWaylandShell *mShell;
    QList<QPlatformScreen *> mScreens;
    QList<QWaylandInputDevice *> mInputDevices;
    QList<Listener> mRegistryListeners;
    QWaylandInputDevice *mLastKeyboardFocusInputDevice;
    QWaylandDataDeviceManager *mDndSelectionHandler;
    QWaylandSurfaceExtension *mWindowExtension;
    QWaylandSubSurfaceExtension *mSubSurfaceExtension;
    QWaylandOutputExtension *mOutputExtension;
    QWaylandTouchExtension *mTouchExtension;
    QWaylandQtKeyExtension *mQtKeyExtension;

    QSocketNotifier *mReadNotifier;
    int mFd;
    int mWritableNotificationFd;
    bool mScreensInitialized;

    static const struct wl_registry_listener registryListener;
    static const struct wl_output_listener outputListener;

    static void displayHandleGlobal(void *data,
                                    struct wl_registry *registry,
                                    uint32_t id,
                                    const char *interface,
                                    uint32_t version);
    static void outputHandleGeometry(void *data,
                                     struct wl_output *output,
                                     int32_t x, int32_t y,
                                     int32_t width, int32_t height,
                                     int subpixel,
                                     const char *make,
                                     const char *model,
                                     int32_t transform);
    static void mode(void *data,
                     struct wl_output *wl_output,
                     uint32_t flags,
                     int width,
                     int height,
                     int refresh);

#ifdef QT_WAYLAND_GL_SUPPORT
    QWaylandGLIntegration *mEglIntegration;
#endif

#ifdef QT_WAYLAND_WINDOWMANAGER_SUPPORT
    QWaylandWindowManagerIntegration *mWindowManagerIntegration;
#endif

    static void shellHandleConfigure(void *data, struct wl_shell *shell,
                                     uint32_t time, uint32_t edges,
                                     struct wl_surface *surface,
                                     int32_t width, int32_t height);
};

#endif // QWAYLANDDISPLAY_H