import * as path from 'path';
import * as kernel from '@lumeweb/libkernel/kernel';

// @ts-ignore
import StaticServer from 'static-server';
import { Page } from 'puppeteer';
import { bufToHex, ed25519, ErrTuple } from '@lumeweb/libkernel';

import * as url from 'url';

const __dirname = url.fileURLToPath(new URL('.', import.meta.url));

export function generateSeedPhrase() {
  return ed25519.utils.randomPrivateKey();
}

export async function login(page: Page, seed = generateSeedPhrase()) {
  await page.goto('http://kernel.lumeweb.com');

  let seedHex = bufToHex(seed);

  await page.evaluate((seed: string) => {
    window.localStorage.setItem('v1-key', seed);
  }, seedHex);
}

export async function loadTester(page: Page, port = 8080) {
  const server = new StaticServer({
    rootPath: path.resolve(__dirname, '..', 'public'),
    port,
    host: 'localhost',
  });
  await new Promise((resolve) => {
    server.start(resolve);
  });
  const stop = () => server.stop();

  process.on('SIGTERM', stop);
  page.browser().on('disconnected', stop);

  await page.goto(`http://localhost:${port}/`);
  await page.evaluate(() => {
    return kernel.init();
  });
}

class Tester {
  private page: Page;

  constructor(page: Page) {
    this.page = page;
  }

  async callModule(id: string, method: string, data = {}): Promise<ErrTuple> {
    return this.page.evaluate(
      async (id, method, data) => {
        return kernel.callModule(id, method, data);
      },
      id,
      method,
      data,
    );
  }
}

export const tester = (page: Page) => new Tester(page);