import * as fs from 'fs';
import { resolve as pathResolve } from 'path';
import { getBuildPath } from '@erect/core/paths';
import { config } from '@erect/core/config';
import { renderHtmlPage } from '@erect/server/middlewares/app/htmlPage';
import { createLocation } from '@erect/core/shared/Location';
import { bundleAssetBase } from '@erect/core/shared/uri';

export function createServerlessHtmlPage() {
  return new Promise((resolve, reject) => {
    const htmlPageFile = pathResolve(getBuildPath(), config.bundles.client.buildOutputDir, 'index.html');
    const htmlPage = renderHtmlPage({
      nonce: '%NONCE%',
      location: createLocation(bundleAssetBase('index.html')),
    });
    fs.writeFile(htmlPageFile, htmlPage, 'utf8', (error) => {
      if (error) {
        reject(error);
        return;
      }
      resolve();
    });
  });
}