// core.c

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

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

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

#define SHARED_MAIN "ampler_main"

#ifdef __WIN32__
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) {
	puts("start.");
	SDL_Init(SDL_INIT_EVERYTHING);

	SDL_Window *w;
	SDL_Renderer *r;

	w = SDL_CreateWindow("core",
		SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
		512, 512, SDL_WINDOW_RESIZABLE);
	r = SDL_CreateRenderer(w, -1,
		SDL_RENDERER_ACCELERATED | SDL_RENDERER_TARGETTEXTURE);

	void *u_data = NULL;
	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)(SDL_Window *, SDL_Renderer *, void **)
			= SDL_LoadFunction(so, SHARED_MAIN);

		if(shared_main(w, r, &u_data))
			break;

		SDL_UnloadObject(so);
	}

	quit:
	SDL_DestroyRenderer(r);
	SDL_DestroyWindow(w);
	SDL_Quit();
	return 0;
}