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

lua_State * engine_lua_state;

// TIME
int engine_luaf_time_get(lua_State *L) {
	lua_pushinteger(L,engine_time_get());
	return 1;
}
int engine_luaf_time_sleep(lua_State *L) {
	int time = luaL_checkinteger(L,1);
	engine_time_sleep(time);
	return 0;
}


// TEXTURES
int engine_luaf_texture_create(lua_State *L) {
	int width = luaL_checkinteger(L,1);
	int height = luaL_checkinteger(L,2);
	struct ENGINE_TEXTURE * texture = engine_createTexture(width,height);
	lua_pushlightuserdata(L,texture);
	return 1;
}
int engine_luaf_texture_destroy(lua_State *L) {
	struct ENGINE_TEXTURE * texture = (struct ENGINE_TEXTURE *)lua_touserdata(L,1);
	engine_texture_destroy(texture);
	return 0;
}
int engine_luaf_texture_render_2d(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;
}
int engine_luaf_texture_from_file(lua_State *L) {
	struct ENGINE_TEXTURE * texture = (struct ENGINE_TEXTURE *)lua_touserdata(L,1);
	char * fpath = (char *)luaL_checkstring(L,2);
	engine_texture_from_file(texture,fpath);
	return 0;
}

void engine_luaInit() {
	engine_lua_state = luaL_newstate();
	luaL_openlibs(engine_lua_state);
	
	// // FUNCTIONS
	// TIME
	lua_pushcfunction(engine_lua_state,engine_luaf_time_get);
	lua_setglobal    (engine_lua_state,"engine_time_get");
	lua_pushcfunction(engine_lua_state,engine_luaf_time_sleep);
	lua_setglobal    (engine_lua_state,"engine_time_sleep");
	
	// TEXTURES
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_create);
	lua_setglobal    (engine_lua_state,"engine_texture_create");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_destroy);
	lua_setglobal    (engine_lua_state,"engine_texture_destroy");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_render_2d);
	lua_setglobal    (engine_lua_state,"engine_texture_render_2d");
	lua_pushcfunction(engine_lua_state,engine_luaf_texture_from_file);
	lua_setglobal    (engine_lua_state,"engine_texture_from_file");
	
	// // USER SCRIPT
	luaL_loadfile(engine_lua_state,"assets/scripts/main.lua");
	lua_call(engine_lua_state,0,0);
}