#include <stdio.h>
#include <lua5.3/lualib.h>
#include <lua5.3/lauxlib.h>
#include "termbox_render.h"
#include "oct_termbox_sprite.h"

#define TB_IMPL
#include "termbox.h"

// Errors
#define OCT_NO_LUA_FILE 1
#define OCT_LUA_FILE_NOT_FOUND 2
#define OCT_LUA_FILE_MISSING_OCT_INIT 3

lua_State *L;

int process_args(int argc, char* argv[]);
int initialize_everything(char* lua_file);
int deinitialize_everything();

int main(int argc, char* argv[]) {
	int process_args_result = process_args(argc, argv);
	switch (process_args_result) {
	case OCT_NO_LUA_FILE:
		fprintf(stderr, "No lua file given\n");
		return EXIT_FAILURE;
		break;
	case OCT_LUA_FILE_NOT_FOUND:
		fprintf(stderr, "Could not open file: %s\n", argv[argc-1]);
		return EXIT_FAILURE;
		break;
	}
	struct tb_event ev;
	int finish = 0;
	while (!finish) {
		tb_clear();
		tb_peek_event(&ev, 10);
		if (ev.key == TB_KEY_ESC) {
			finish = 1;
		}
		lua_getglobal(L, "oct_loop");
		lua_pushinteger(L, ev.key);
		lua_pushinteger(L, ev.ch);
		lua_call(L, 2, 0);
		
		for (uint32_t i=0; i < oct_tb_sprite_list.new_index; i++) {
			oct_render_termbox_sprite(oct_tb_sprite_list.sprite_list[i]);
		}
		tb_present();
	}
	deinitialize_everything();
	return EXIT_SUCCESS;
}

int process_args(int argc, char* argv[]) {
	if (argc == 1) { // Didn't specify a file
		return OCT_NO_LUA_FILE;
	}
	// TODO define other cmd line args here
	return initialize_everything(argv[argc-1]); // lua file should always be last argument
}

int initialize_everything(char* lua_file) {
	if (!oct_tb_sprite_list_initialize()) {
		return 0;
	}
	L = luaL_newstate();
	if (L == NULL) {
		fprintf(stderr, "Can't initialize Lua\n");
		return 0;
	}
	luaL_openlibs(L);
	oct_tb_initialize_lua(L);
	if (luaL_dofile(L, lua_file)) return OCT_LUA_FILE_NOT_FOUND;
	lua_getglobal(L, "oct_init");
	lua_call(L, 0, 0);
	tb_init();
	return 0;
}

int deinitialize_everything() {
	tb_shutdown();
	lua_close(L);
	oct_tb_sprite_list_deinitialize();
	return 1;
}