// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.

use crate::assert_napi_ok;
use crate::napi_new_property;
use core::ffi::c_void;
use napi_sys::TypedarrayType::uint8_array;
use napi_sys::*;
use std::ptr;

extern "C" fn test_external(
  env: napi_env,
  _info: napi_callback_info,
) -> napi_value {
  let mut arraybuffer: napi_value = ptr::null_mut();
  let mut external: Box<[u8; 4]> = Box::new([0, 1, 2, 3]);
  assert_napi_ok!(napi_create_external_arraybuffer(
    env,
    external.as_mut_ptr() as *mut c_void,
    external.len(),
    None,
    ptr::null_mut(),
    &mut arraybuffer,
  ));

  let mut typedarray: napi_value = ptr::null_mut();
  assert_napi_ok!(napi_create_typedarray(
    env,
    uint8_array,
    external.len(),
    arraybuffer,
    0,
    &mut typedarray,
  ));

  std::mem::forget(external); // Leak into JS land
  typedarray
}

pub fn init(env: napi_env, exports: napi_value) {
  let properties = &[napi_new_property!(env, "test_external", test_external)];

  assert_napi_ok!(napi_define_properties(
    env,
    exports,
    properties.len(),
    properties.as_ptr()
  ));
}