import { chromium } from 'playwright'; // stealth plugin needs no outdated playwright-extra
import path from 'path';
import { dirs, jsonDb, datetime, stealth, filenamify } from './util.js';
import { existsSync, writeFileSync } from 'fs';

const debug = process.env.PWDEBUG == '1'; // runs non-headless and opens https://playwright.dev/docs/inspector

const URL_CLAIM = 'https://store.epicgames.com/en-US/free-games';
const URL_LOGIN = 'https://www.epicgames.com/id/login?lang=en-US&noHostRedirect=true&redirectUrl=' + URL_CLAIM;
const TIMEOUT = 20 * 1000; // 20s, default is 30s
const SCREEN_WIDTH = Number(process.env.SCREEN_WIDTH) - 80 || 1280;
const SCREEN_HEIGHT = Number(process.env.SCREEN_HEIGHT) || 1280;

const db = await jsonDb('epic-games.json');
const migrateDb = (user) => {
  if (user in db.data || !('claimed' in db.data)) return;
  db.data[user] = {};
  for (const e of db.data.claimed) {
    const k = e.url.split('/').pop();
    db.data[user][k] = e;
  }
  delete db.data.claimed;
  delete db.data.runs;
}

// https://www.nopecha.com extension source from https://github.com/NopeCHA/NopeCHA/releases/tag/0.1.16
const ext = path.resolve('nopecha');

// https://playwright.dev/docs/auth#multi-factor-authentication
const context = await chromium.launchPersistentContext(dirs.browser, {
  // chrome will not work in linux arm64, only chromium
  // channel: 'chrome', // https://playwright.dev/docs/browsers#google-chrome--microsoft-edge
  headless: false,
  viewport: { width: SCREEN_WIDTH, height: SCREEN_HEIGHT },
  userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.83 Safari/537.36', // see replace of Headless in util.newStealthContext. TODO Windows UA enough to avoid 'device not supported'? update if browser is updated?
  locale: "en-US", // ignore OS locale to be sure to have english text for locators
  // recordVideo: { dir: 'data/videos/' }, // will record a .webm video for each page navigated
  args: [ // https://peter.sh/experiments/chromium-command-line-switches
    // don't want to see bubble 'Restore pages? Chrome didn't shut down correctly.'
    // '--restore-last-session', // does not apply for crash/killed
    '--hide-crash-restore-bubble',
    `--disable-extensions-except=${ext}`,
    `--load-extension=${ext}`,
  ],
  // ignoreDefaultArgs: ['--enable-automation'], // remove default arg that shows the info bar with 'Chrome is being controlled by automated test software.'. Since Chromeium 106 this leads to show another info bar with 'You are using an unsupported command-line flag: --no-sandbox. Stability and security will suffer.'.
});

// Without stealth plugin, the website shows an hcaptcha on login with username/password and in the last step of claiming a game. It may have other heuristics like unsuccessful logins as well. After <6h (TBD) it resets to no captcha again. Getting a new IP also resets.
await stealth(context);

if (!debug) context.setDefaultTimeout(TIMEOUT);

const page = context.pages().length ? context.pages()[0] : await context.newPage(); // should always exist
// console.debug('userAgent:', await page.evaluate(() => navigator.userAgent));

try {
  await context.addCookies([{name: 'OptanonAlertBoxClosed', value: '2022-10-06T21:15:28.081Z', domain: '.epicgames.com', path: '/'}]);

  await page.goto(URL_CLAIM, { waitUntil: 'domcontentloaded' }); // 'domcontentloaded' faster than default 'load' https://playwright.dev/docs/api/class-page#page-goto

  // Accept cookies to get rid of banner to save space on screen. Clicking this did not always work since the message was animated in too slowly.
  // page.click('button:has-text("Accept All Cookies")').catch(_ => { }); // not needed anymore since we set the cookie above

  while (await page.locator('a[role="button"]:has-text("Sign In")').count() > 0) { // TODO also check alternative for signed-in state
    console.error("Not signed in anymore. Please login and then navigate to the 'Free Games' page. If using docker, open http://localhost:6080");
    context.setDefaultTimeout(0); // give user time to log in without timeout
    await page.goto(URL_LOGIN, { waitUntil: 'domcontentloaded' });
    // after login it just reloads the login page...
    await page.waitForNavigation({ url: URL_CLAIM });
    context.setDefaultTimeout(TIMEOUT);
    // process.exit(1);
  }
  const user = await page.locator('#user span').first().innerHTML();
  console.log(`Signed in as ${user}`);
  migrateDb(user); // TODO remove this after some time since it will run fine without and people can still use this commit to adjust their data epic-games.json
  db.data[user] ||= {};

  // Detect free games
  const game_loc = await page.locator('a:has(span:text-is("Free Now"))');
  await game_loc.last().waitFor();
  // clicking on `game_sel` sometimes led to a 404, see https://github.com/vogler/free-games-claimer/issues/25
  // debug showed that in those cases the href was still correct, so we `goto` the urls instead of clicking.
  // Alternative: parse the json loaded to build the page https://store-site-backend-static-ipv4.ak.epicgames.com/freeGamesPromotions
    // filter data.Catalog.searchStore.elements for .promotions.promotionalOffers being set and build URL with .catalogNs.mappings[0].pageSlug or .urlSlug if not set to some wrong id like it was the case for spirit-of-the-north-f58a66 - this is also what's done here: https://github.com/claabs/epicgames-freegames-node/blob/938a9653ffd08b8284ea32cf01ac8727d25c5d4c/src/puppet/free-games.ts#L138-L213
  const urlSlugs = await Promise.all((await game_loc.elementHandles()).map(a => a.getAttribute('href')));
  const urls = urlSlugs.map(s => 'https://store.epicgames.com' + s);
  console.log('Free games:', urls);

  for (const url of urls) {
    await page.goto(url, { waitUntil: 'domcontentloaded' });
    const btnText = await page.locator('//button[@data-testid="purchase-cta-button"][not(contains(.,"Loading"))]').first().innerText(); // barrier to block until page is loaded

    // click Continue if 'This game contains mature content recommended only for ages 18+'
    if (await page.locator('button:has-text("Continue")').count() > 0) {
      console.log('This game contains mature content recommended only for ages 18+');
      await page.click('button:has-text("Continue")');
    }

    const title = await page.locator('h1 div').first().innerText();
    const game_id = page.url().split('/').pop();
    db.data[user][game_id] ||= { title, time: datetime(), url: page.url() }; // this will be set on the initial run only!
    console.log('Current free game:', title);

    if (btnText.toLowerCase() == 'in library') {
      console.log('  Already in library! Nothing to claim.');
      db.data[user][game_id].status ||= 'existed'; // does not overwrite claimed or failed
      if (db.data[user][game_id].status == 'failed') db.data[user][game_id].status = 'manual'; // was failed but now it's claimed
    } else { // GET
      console.log('  Not in library yet! Click GET.');
      await page.click('[data-testid="purchase-cta-button"]');

      // click Continue if 'Device not supported. This product is not compatible with your current device.' - avoided by Windows userAgent?
      // page.click('button:has-text("Continue")').catch(_ => { });

      if (process.env.DRYRUN) continue;
      if (debug) await page.pause();

      // it then creates an iframe for the purchase
      const iframe = page.frameLocator('#webPurchaseContainer iframe');
      await iframe.locator('button:has-text("Place Order")').click();

      // I Agree button is only shown for EU accounts! https://github.com/vogler/free-games-claimer/pull/7#issuecomment-1038964872
      const btnAgree = iframe.locator('button:has-text("I Agree")');
      try {
        context.setDefaultTimeout(100 * 1000); // give time to solve captcha, iframe goes blank after 60s?
        await Promise.any([btnAgree.click(), page.waitForSelector('text=Thank you for buying').then(_ => { })]); // EU: wait for agree button, non-EU: potentially done

        const captcha = iframe.locator('#h_captcha_challenge_checkout_free_prod iframe');
        await captcha.waitFor().then(async () => {
          console.info('  Got hcaptcha challenge! NopeCHA extension will likely solve it.')
          // await page.waitForTimeout(2000);
          // const p = path.resolve(dirs.screenshots, 'epic-games', 'captcha', `${filenamify(datetime())}.png`);
          // await captcha.screenshot({ path: p });
          // console.info('  Saved a screenshot of hcaptcha challenge to', p);
          // console.error('  Got hcaptcha challenge. To avoid it, get a link from https://www.hcaptcha.com/accessibility'); // TODO save this link in config and visit it daily to set accessibility cookie to avoid captcha challenge?
        });

        await page.waitForSelector('text=Thank you for buying'); // EU: wait, non-EU: wait again = no-op
        db.data[user][game_id].status = 'claimed';
        db.data[user][game_id].time = datetime(); // claimed time overwrites failed time
        console.log('  Claimed successfully!');
        context.setDefaultTimeout(TIMEOUT);
      } catch (e) {
        console.log(e);
        console.error('  Failed to claim! Try again if NopeCHA timed out. Click the extension to see if you ran out of credits (refill after 24h). To avoid captchas try to get a new IP or set a cookie from https://www.hcaptcha.com/accessibility');
        const p = path.resolve(dirs.screenshots, 'epic-games', 'failed', `${game_id}_${filenamify(datetime())}.png`);
        await page.screenshot({ path: p, fullPage: true });
        db.data[user][game_id].status = 'failed';
      }

      const p = path.resolve(dirs.screenshots, 'epic-games', `${game_id}.png`);
      if (!existsSync(p)) await page.screenshot({ path: p, fullPage: false }); // fullPage is quite long...
    }
  }
} catch (error) {
  console.error(error); // .toString()?
} finally {
  await db.write(); // write out json db
}
await writeFileSync(path.resolve(dirs.browser, 'cookies.json'), JSON.stringify(await context.cookies()));
await context.close();