#include "backend.h"

#include <errno.h>

void *yasl_private_display_get_native_handle(struct yasl_private_display *d)
{
    if (!d) return NULL;
    if (d->native_handle) return d->native_handle;
    return d->ops && d->ops->display_get_native_handle ?
        d->ops->display_get_native_handle(d) : NULL;
}

void *yasl_private_surface_get_native_handle(struct yasl_surface *s)
{
    if (!s) return NULL;
    if (s->native_handle) return s->native_handle;
    return s->display && s->display->ops && s->display->ops->surface_get_native_handle ?
        s->display->ops->surface_get_native_handle(s) : NULL;
}

struct yasl_surface *yasl_private_surface_create_native(struct yasl_private_display *d,
        const struct yasl_private_window_spec *spec, void *graphics_device)
{
    if (!graphics_device) {
        errno = EINVAL;
        return NULL;
    }
    return yasl_private_create_toplevel(d, spec, graphics_device);
}

bool yasl_private_surface_get_native_frame(struct yasl_surface *s,
        const struct yasl_private_framebuffer *target, struct yasl_private_native_frame *out)
{
    if (!s || !target || !out || !target->generation ||
        target->generation != s->frame_generation ||
        !s->display->ops->surface_get_native_frame)
        return false;
    return s->display->ops->surface_get_native_frame(s, target, out);
}

#include "public_internal.h"
#include "yasl/metal.h"
#if YASL_HAS_WAYLAND
#include "yasl/native/wayland.h"
struct wl_display *yasl_wayland_display(const yasl_surface *s)
{ return s && s->display->ops->type==YASL_PRIVATE_BACKEND_WAYLAND ? yasl_private_display_get_native_handle(s->display):NULL; }
struct wl_surface *yasl_wayland_surface(const yasl_surface *s)
{ return s && s->display->ops->type==YASL_PRIVATE_BACKEND_WAYLAND ? yasl_private_surface_get_native_handle((yasl_surface*)s):NULL; }
#endif
#if YASL_HAS_X11
#include "yasl/native/x11.h"
Display *yasl_x11_display(const yasl_surface *s)
{ return s && s->display->ops->type==YASL_PRIVATE_BACKEND_X11 ? yasl_private_display_get_native_handle(s->display):NULL; }
uintptr_t yasl_x11_window(const yasl_surface *s)
{ return s && s->display->ops->type==YASL_PRIVATE_BACKEND_X11 ? (uintptr_t)yasl_private_surface_get_native_handle((yasl_surface*)s):0; }
#endif
#if YASL_HAS_COCOA
#include "yasl/native/cocoa.h"
#include "common/private_native_cocoa.h"
NSApplication *yasl_cocoa_application(void)
{ struct yasl_private_display *d=yasl_public_display();return d ? yasl_private_cocoa_display_get_application(d):NULL; }
NSWindow *yasl_cocoa_window(const yasl_surface *s)
{ return yasl_private_cocoa_surface_get_window((yasl_surface*)s); }
NSView *yasl_cocoa_view(const yasl_surface *s)
{ return yasl_private_cocoa_surface_get_view((yasl_surface*)s); }
#endif
CAMetalLayer *yasl_metal_layer(yasl_surface *s)
{
    if(!yasl_public_surface(s,false))return NULL;
    if(s->presenter!=YASL_PRIVATE_PRESENTER_NONE && s->presenter!=YASL_PRIVATE_PRESENTER_METAL) {yasl_public_fail(EBUSY);return NULL;}
    if(!s->display->ops->surface_get_metal_layer){yasl_public_fail(ENOTSUP);return NULL;}
    CAMetalLayer *layer=s->display->ops->surface_get_metal_layer(s);
    if(!layer){yasl_public_fail(ENOTSUP);return NULL;}
    s->presenter=YASL_PRIVATE_PRESENTER_METAL;return layer;
}