import { DatagramSocket } from './websocket'
import { BatchTimer } from './batch-timer'

function _(key: string, value: any | null | undefined = undefined): any | null {
  const x = <any>window;
  if (value !== undefined) {
    x[key] = value;
  }
  return x[key];
}

function $(id: string): HTMLElement | null {
  return document.getElementById(id);
}

function errMsg(msg: string): void {
  const div = $("err_div");
  const w = $("err_wrapper");
  if (div && w) {
    div.innerText = msg;
    w.style.display = "block";
  }
}

function closeErr(): void {
  const w = $("err_wrapper");
  if (w) {
    w.style.display = "none";
  }
}

async function authorizedFetch(method: string, uri: string, body: any): Promise<Response> {
  const headers = new Headers()
  headers.set('Authorization', 'Bearer ' + DatagramSocket.skey)
  return await fetch(uri, {
    method: method,
    headers: headers,
    body: body,
  })
}

export default { _, $, authorizedFetch, errMsg, closeErr }