import * as Runno from '@runno/wasi'
import { patchImportObject } from './patch-wasi'

/** @typedef {{
 *    stdin: (len: number) => Uint8Array | null,
 *    stdout: (out: Uint8Array) => void,
 *    stderr: (err: Uint8Array) => void,
 *  }} MyStdioDef */

/** @typedef {Partial<
 *    Omit<Runno.WASIContextOptions, 'stdin' | 'stdout' | 'stderr'> & MyStdioDef
 *  >} PatchedRunnoWASIContextOptions */

/** @param {PatchedRunnoWASIContextOptions} opt
 * @returns {Runno.WASIContextOptions} */
function definePatchedRunnoWASIContextOptions(opt) {
  return /** @type {Runno.WASIContextOptions} */(
    /** @type {unknown} */ (opt))
}


const wasi = new WASI(definePatchedRunnoWASIContextOptions({
  stdout(buf) {
    console.log(buf.byteLength)
  }
  /* ... */
})

const importObject = patchImportObject(wasi, timeout => {
  // let waitDuration = timeout < 0 ? Infinity : Math.max(timeout - Date.now(), 0)
  // return stdinReader.pollRead(waitDuration)
})

const wasm = await WebAssembly.instantiateStreaming(fetch('...'), importObject)