#include <lua5.3/lua.h>
#include <lua5.3/lualib.h>
#include <lua5.3/lauxlib.h>

lua_State * engine_lua_state;

int engine_luafSleep(lua_State *L) {
	int time = luaL_checkinteger(L,1);
	engine_time_sleep(time);
	return 0;
}

int engine_luafTimeGet(lua_State *L) {
	lua_pushinteger(L,engine_time_get());
	return 1;
}

int engine_luafLoadTexture(lua_State *L) {
	char * fpath = (char *)luaL_checkstring(L,1);
	int width = luaL_checkinteger(L,2);
	int height = luaL_checkinteger(L,3);
	struct ENGINE_TEXTURE * texture = engine_createTexture(width,height);
	engine_texture_from_file(texture,fpath);
	lua_pushlightuserdata(L,texture);
	return 1;
}

int engine_luafRenderTexture2D(lua_State *L) {
	struct ENGINE_TEXTURE * texture = (struct ENGINE_TEXTURE *)lua_touserdata(L,1);
	int x = luaL_checkinteger(L,2);
	int y = luaL_checkinteger(L,3);
	engine_texture_render_2d(texture,x,y);
	return 0;
}

void engine_luaInit() {
	engine_lua_state = luaL_newstate();
	luaL_openlibs(engine_lua_state);
	
	// Functions
	lua_pushcfunction(engine_lua_state,engine_luafSleep);
	lua_setglobal    (engine_lua_state,"engine_sleep");
	lua_pushcfunction(engine_lua_state,engine_luafLoadTexture);
	lua_setglobal    (engine_lua_state,"engine_loadTexture");
	lua_pushcfunction(engine_lua_state,engine_luafRenderTexture2D);
	lua_setglobal    (engine_lua_state,"engine_renderTexture2D");
	
	// Start user script
	luaL_loadfile(engine_lua_state,"assets/scripts/main.lua");
	lua_call(engine_lua_state,0,0);
}