// core.c

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

#define SDL_MAIN_HANDLED
#include <SDL2/SDL.h>

#define PROJECT_NAME "sdfps"

#ifdef __WIN32__
# define SHARED_OBJECT PROJECT_NAME ".dll"
# define SHARED_OBJECT_ACTIVE SHARED_OBJECT "-active.dll"
#else
# define SHARED_OBJECT "./" PROJECT_NAME ".so"
# define SHARED_OBJECT_ACTIVE SHARED_OBJECT
#endif

#define SHARED_MAIN PROJECT_NAME "_main"

#ifdef __WIN32__
/*
 * windows doesn't let us overwite a dll that's currently in use, but it
 * seems that macos/linux does
*/
int copy_shared_object() {
	if (system("copy " SHARED_OBJECT " " SHARED_OBJECT_ACTIVE " /Y")) {
		puts("failed copying to " SHARED_OBJECT_ACTIVE);
		// puts(SDL_GetError());
		return 1;
	}
	return 0;
}
#else
int copy_shared_object() {
	return 0;
}
#endif

int main(int argc, char **argv) {
	void *u_data = NULL;

	puts("start.");
	SDL_Init(SDL_INIT_EVERYTHING);

	while (1) {
		if (copy_shared_object())
			break;

		void *so = SDL_LoadObject(SHARED_OBJECT_ACTIVE);
		if (so == 0) {
			puts("failed load " SHARED_OBJECT_ACTIVE);
			puts(SDL_GetError());
			break;
		}

		int(*shared_main)(int, char **, void **) = SDL_LoadFunction(so, SHARED_MAIN);

		if(shared_main(argc, argv, &u_data) != 0)
			break;

		SDL_UnloadObject(so);
	}

	quit:
	SDL_Quit();
	puts("done.");
	return 0;
}