#include <stdlib.h>
#include <stdio.h>

#include <wayland-client.h>

#define ASSERT(cond, msg)\
  if(!(cond)) {\
    fprintf(stderr, "Runtime assertion %s at %s:%d failed: %s\n", #cond, __FILE__, __LINE__, msg);\
    exit(-1);\
  }

void handle_global(
    void* data, 
    struct wl_registry* registry, 
    uint32_t name,
    const char* interface, 
    uint32_t version) {
  printf("v%d %s\n", version, interface);
}

void handle_global_remove(
    void* data,
    struct wl_registry* registry,
    uint32_t name) {
	// Who cares
}

const struct wl_registry_listener reg_callbacks = {
	.global = handle_global,
	.global_remove = handle_global_remove,
};

int main() {
  struct wl_display* dpy = wl_display_connect(NULL);
  ASSERT(dpy != NULL, "Unable to connect to Wayland");

  struct wl_registry* registry = wl_display_get_registry(dpy);
	wl_registry_add_listener(registry, &reg_callbacks, NULL);
	wl_display_roundtrip(dpy);
  return 0;
}