#include <gtk/gtk.h>

#include "../drawables/ninepatch.h"

#include "WrapperWidget.h"

/**
 * gdk_texture_new_for_surface:
 * @surface: a cairo image surface
 *
 * Creates a new texture object representing the surface.
 *
 * @surface must be an image surface with format CAIRO_FORMAT_ARGB32.
 *
 * Returns: a new `GdkTexture`
 */
GdkTexture * gdk_texture_new_for_surface (cairo_surface_t *surface)
{
  GdkTexture *texture;
  GBytes *bytes;

  g_return_val_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_IMAGE, NULL);
  g_return_val_if_fail (cairo_image_surface_get_width (surface) > 0, NULL);
  g_return_val_if_fail (cairo_image_surface_get_height (surface) > 0, NULL);

  bytes = g_bytes_new_with_free_func (cairo_image_surface_get_data (surface),
                                      cairo_image_surface_get_height (surface)
                                      * cairo_image_surface_get_stride (surface),
                                      (GDestroyNotify) cairo_surface_destroy,
                                      cairo_surface_reference (surface));
  
  texture = gdk_memory_texture_new (cairo_image_surface_get_width (surface),
                                    cairo_image_surface_get_height (surface),
                                    GDK_MEMORY_DEFAULT,
                                    bytes,
                                    cairo_image_surface_get_stride (surface));

  g_bytes_unref (bytes);

  return texture;
}

// ---

G_DEFINE_TYPE(WrapperWidget, wrapper_widget, GTK_TYPE_WIDGET)

static void wrapper_widget_init (WrapperWidget *wrapper_widget)
{

}

static void wrapper_widget_dispose(GObject *wrapper_widget)
{
	gtk_widget_unparent(gtk_widget_get_first_child(GTK_WIDGET(wrapper_widget)));
	G_OBJECT_CLASS (wrapper_widget_parent_class)->dispose (wrapper_widget);
}

void wrapper_snapshot(GtkWidget* widget, GtkSnapshot* snapshot)
{
	struct ninepatch_t *ninepatch = g_object_get_data(G_OBJECT(widget), "background_ninepatch");

	if(ninepatch && 0) {
		GtkAllocation alloc;
		gtk_widget_get_allocation(widget, &alloc);

		ninepatch_stretch(ninepatch, alloc.width, alloc.height);

		cairo_surface_t *surface = ninepatch_to_surface(ninepatch);

//		GdkPixbuf *pixbuf = gdk_pixbuf_get_from_surface(surface, 0, 0, ninepatch->__w, ninepatch->__h);
//		GdkTexture *texture = gdk_texture_new_for_pixbuf(pixbuf);
		GdkTexture *texture = gdk_texture_new_for_surface(surface);

		gtk_snapshot_append_texture(snapshot, texture, &GRAPHENE_RECT_INIT(0, 0, ninepatch->__w, ninepatch->__h));

		cairo_surface_destroy(surface);
//		g_object_unref(pixbuf);
		g_object_unref(texture);
	}
	gtk_widget_snapshot_child(widget, gtk_widget_get_first_child(widget), snapshot);
}


static void wrapper_widget_class_init(WrapperWidgetClass *class)
{
	GObjectClass *object_class = G_OBJECT_CLASS (class);
	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);

	object_class->dispose = wrapper_widget_dispose;

	widget_class->snapshot = wrapper_snapshot;

	gtk_widget_class_set_layout_manager_type(widget_class, GTK_TYPE_BIN_LAYOUT);
}

GtkWidget * wrapper_widget_new(void)
{
	return g_object_new (wrapper_widget_get_type(), NULL);
}

void wrapper_widget_set_child(WrapperWidget *parent, GtkWidget *child) // TODO: make sure there can only be one child
{
	gtk_widget_insert_before(child, GTK_WIDGET(parent), NULL);
}