use futures::prelude::*;
use napi::bindgen_prelude::*;
use napi::tokio::{self, fs};

#[napi]
async fn read_file_async(path: String) -> Result<Buffer> {
  fs::read(path)
    .map(|r| match r {
      Ok(content) => Ok(content.into()),
      Err(e) => Err(Error::new(
        Status::GenericFailure,
        format!("failed to read file, {}", e),
      )),
    })
    .await
}

#[napi]
async fn async_multi_two(arg: u32) -> Result<u32> {
  tokio::task::spawn(async move { Ok(arg * 2) })
    .await
    .unwrap()
}