/**
 * Creates a custom script loader function which passed to nosto-react component NostoProvider as a prop
 * and used in useLoadClientScript hook for loading scripts. This will override the default script loader behaviour
 * since a `nonce` attribute is required by Shopify for third party scripts. Additionally, this lets the useLoadClientScript
 * to handle building the URL string (scriptSrc in the returned function param).
 */

import { ScriptLoadOptions } from '@nosto/nosto-react';

type ScriptLoader = (scriptSrc: string, options?: ScriptLoadOptions) => Promise<void>;

export default function createScriptLoader(nonce: string): ScriptLoader {
  return function (scriptSrc: string, options?: ScriptLoadOptions): Promise<void> {
    return new Promise((resolve, reject) => {
      const script = document.createElement('script');
      script.type = 'text/javascript';
      script.src = scriptSrc;
      script.async = true;
      script.setAttribute('nonce', nonce);
      script.onload = () => resolve();
      script.onerror = () => reject();
      Object.entries(options?.attributes ?? {}).forEach(([k, v]) =>
        script.setAttribute(k, v as string),
      );
      if (options?.position === 'head') {
        document.head.appendChild(script);
      } else {
        document.body.appendChild(script);
      }
    });
  };
}