/**
 * @license
 * Copyright 2023 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */

import fs from 'fs';
import path from 'path';

import {getJSON} from '../httpUtil.js';

import {BrowserPlatform, type ProfileOptions} from './types.js';

function archiveNightly(platform: BrowserPlatform, buildId: string): string {
  switch (platform) {
    case BrowserPlatform.LINUX:
      return `firefox-${buildId}.en-US.${platform}-x86_64.tar.bz2`;
    case BrowserPlatform.MAC_ARM:
    case BrowserPlatform.MAC:
      return `firefox-${buildId}.en-US.mac.dmg`;
    case BrowserPlatform.WIN32:
    case BrowserPlatform.WIN64:
      return `firefox-${buildId}.en-US.${platform}.zip`;
  }
}

function archive(platform: BrowserPlatform, buildId: string): string {
  switch (platform) {
    case BrowserPlatform.LINUX:
      return `firefox-${buildId}.tar.bz2`;
    case BrowserPlatform.MAC_ARM:
    case BrowserPlatform.MAC:
      return `Firefox ${buildId}.dmg`;
    case BrowserPlatform.WIN32:
    case BrowserPlatform.WIN64:
      return `Firefox Setup ${buildId}.exe`;
  }
}

function platformName(platform: BrowserPlatform): string {
  switch (platform) {
    case BrowserPlatform.LINUX:
      return `linux-x86_64`;
    case BrowserPlatform.MAC_ARM:
    case BrowserPlatform.MAC:
      return `mac`;
    case BrowserPlatform.WIN32:
    case BrowserPlatform.WIN64:
      return platform;
  }
}

function parseBuildId(buildId: string): [FirefoxChannel, string] {
  for (const value of Object.values(FirefoxChannel)) {
    if (buildId.startsWith(value + '_')) {
      buildId = buildId.substring(value.length + 1);
      return [value, buildId];
    }
  }
  // Older versions do not have channel as the prefix.«
  return [FirefoxChannel.NIGHTLY, buildId];
}

export function resolveDownloadUrl(
  platform: BrowserPlatform,
  buildId: string,
  baseUrl?: string
): string {
  const [channel] = parseBuildId(buildId);
  switch (channel) {
    case FirefoxChannel.NIGHTLY:
      baseUrl ??=
        'https://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central';
      break;
    case FirefoxChannel.DEVEDITION:
      baseUrl ??= 'https://archive.mozilla.org/pub/devedition/releases';
      break;
    case FirefoxChannel.BETA:
    case FirefoxChannel.STABLE:
    case FirefoxChannel.ESR:
      baseUrl ??= 'https://archive.mozilla.org/pub/firefox/releases';
      break;
  }
  return `${baseUrl}/${resolveDownloadPath(platform, buildId).join('/')}`;
}

export function resolveDownloadPath(
  platform: BrowserPlatform,
  buildId: string
): string[] {
  const [channel, resolvedBuildId] = parseBuildId(buildId);
  switch (channel) {
    case FirefoxChannel.NIGHTLY:
      return [archiveNightly(platform, resolvedBuildId)];
    case FirefoxChannel.DEVEDITION:
    case FirefoxChannel.BETA:
    case FirefoxChannel.STABLE:
    case FirefoxChannel.ESR:
      return [
        resolvedBuildId,
        platformName(platform),
        'en-US',
        archive(platform, resolvedBuildId),
      ];
  }
}

export function relativeExecutablePath(
  platform: BrowserPlatform,
  buildId: string
): string {
  const [channel] = parseBuildId(buildId);
  switch (channel) {
    case FirefoxChannel.NIGHTLY:
      switch (platform) {
        case BrowserPlatform.MAC_ARM:
        case BrowserPlatform.MAC:
          return path.join(
            'Firefox Nightly.app',
            'Contents',
            'MacOS',
            'firefox'
          );
        case BrowserPlatform.LINUX:
          return path.join('firefox', 'firefox');
        case BrowserPlatform.WIN32:
        case BrowserPlatform.WIN64:
          return path.join('firefox', 'firefox.exe');
      }
    case FirefoxChannel.BETA:
    case FirefoxChannel.DEVEDITION:
    case FirefoxChannel.ESR:
    case FirefoxChannel.STABLE:
      switch (platform) {
        case BrowserPlatform.MAC_ARM:
        case BrowserPlatform.MAC:
          return path.join('Firefox.app', 'Contents', 'MacOS', 'firefox');
        case BrowserPlatform.LINUX:
          return path.join('firefox', 'firefox');
        case BrowserPlatform.WIN32:
        case BrowserPlatform.WIN64:
          return path.join('core', 'firefox.exe');
      }
  }
}

export enum FirefoxChannel {
  STABLE = 'stable',
  ESR = 'esr',
  DEVEDITION = 'devedition',
  BETA = 'beta',
  NIGHTLY = 'nightly',
}

export async function resolveBuildId(
  channel: FirefoxChannel = FirefoxChannel.NIGHTLY
): Promise<string> {
  const channelToVersionKey = {
    [FirefoxChannel.ESR]: 'FIREFOX_ESR',
    [FirefoxChannel.STABLE]: 'LATEST_FIREFOX_VERSION',
    [FirefoxChannel.DEVEDITION]: 'FIREFOX_DEVEDITION',
    [FirefoxChannel.BETA]: 'FIREFOX_DEVEDITION',
    [FirefoxChannel.NIGHTLY]: 'FIREFOX_NIGHTLY',
  };
  const versions = (await getJSON(
    new URL('https://product-details.mozilla.org/1.0/firefox_versions.json')
  )) as Record<string, string>;
  const version = versions[channelToVersionKey[channel]];
  if (!version) {
    throw new Error(`Channel ${channel} is not found.`);
  }
  return channel + '_' + version;
}

export async function createProfile(options: ProfileOptions): Promise<void> {
  if (!fs.existsSync(options.path)) {
    await fs.promises.mkdir(options.path, {
      recursive: true,
    });
  }
  await syncPreferences({
    preferences: {
      ...defaultProfilePreferences(options.preferences),
      ...options.preferences,
    },
    path: options.path,
  });
}

function defaultProfilePreferences(
  extraPrefs: Record<string, unknown>
): Record<string, unknown> {
  const server = 'dummy.test';

  const defaultPrefs = {
    // Make sure Shield doesn't hit the network.
    'app.normandy.api_url': '',
    // Disable Firefox old build background check
    'app.update.checkInstallTime': false,
    // Disable automatically upgrading Firefox
    'app.update.disabledForTesting': true,

    // Increase the APZ content response timeout to 1 minute
    'apz.content_response_timeout': 60000,

    // Prevent various error message on the console
    // jest-puppeteer asserts that no error message is emitted by the console
    'browser.contentblocking.features.standard':
      '-tp,tpPrivate,cookieBehavior0,-cm,-fp',

    // Enable the dump function: which sends messages to the system
    // console
    // https://bugzilla.mozilla.org/show_bug.cgi?id=1543115
    'browser.dom.window.dump.enabled': true,
    // Disable topstories
    'browser.newtabpage.activity-stream.feeds.system.topstories': false,
    // Always display a blank page
    'browser.newtabpage.enabled': false,
    // Background thumbnails in particular cause grief: and disabling
    // thumbnails in general cannot hurt
    'browser.pagethumbnails.capturing_disabled': true,

    // Disable safebrowsing components.
    'browser.safebrowsing.blockedURIs.enabled': false,
    'browser.safebrowsing.downloads.enabled': false,
    'browser.safebrowsing.malware.enabled': false,
    'browser.safebrowsing.phishing.enabled': false,

    // Disable updates to search engines.
    'browser.search.update': false,
    // Do not restore the last open set of tabs if the browser has crashed
    'browser.sessionstore.resume_from_crash': false,
    // Skip check for default browser on startup
    'browser.shell.checkDefaultBrowser': false,

    // Disable newtabpage
    'browser.startup.homepage': 'about:blank',
    // Do not redirect user when a milstone upgrade of Firefox is detected
    'browser.startup.homepage_override.mstone': 'ignore',
    // Start with a blank page about:blank
    'browser.startup.page': 0,

    // Do not allow background tabs to be zombified on Android: otherwise for
    // tests that open additional tabs: the test harness tab itself might get
    // unloaded
    'browser.tabs.disableBackgroundZombification': false,
    // Do not warn when closing all other open tabs
    'browser.tabs.warnOnCloseOtherTabs': false,
    // Do not warn when multiple tabs will be opened
    'browser.tabs.warnOnOpen': false,

    // Do not automatically offer translations, as tests do not expect this.
    'browser.translations.automaticallyPopup': false,

    // Disable the UI tour.
    'browser.uitour.enabled': false,
    // Turn off search suggestions in the location bar so as not to trigger
    // network connections.
    'browser.urlbar.suggest.searches': false,
    // Disable first run splash page on Windows 10
    'browser.usedOnWindows10.introURL': '',
    // Do not warn on quitting Firefox
    'browser.warnOnQuit': false,

    // Defensively disable data reporting systems
    'datareporting.healthreport.documentServerURI': `http://${server}/dummy/healthreport/`,
    'datareporting.healthreport.logging.consoleEnabled': false,
    'datareporting.healthreport.service.enabled': false,
    'datareporting.healthreport.service.firstRun': false,
    'datareporting.healthreport.uploadEnabled': false,

    // Do not show datareporting policy notifications which can interfere with tests
    'datareporting.policy.dataSubmissionEnabled': false,
    'datareporting.policy.dataSubmissionPolicyBypassNotification': true,

    // DevTools JSONViewer sometimes fails to load dependencies with its require.js.
    // This doesn't affect Puppeteer but spams console (Bug 1424372)
    'devtools.jsonview.enabled': false,

    // Disable popup-blocker
    'dom.disable_open_during_load': false,

    // Enable the support for File object creation in the content process
    // Required for |Page.setFileInputFiles| protocol method.
    'dom.file.createInChild': true,

    // Disable the ProcessHangMonitor
    'dom.ipc.reportProcessHangs': false,

    // Disable slow script dialogues
    'dom.max_chrome_script_run_time': 0,
    'dom.max_script_run_time': 0,

    // Only load extensions from the application and user profile
    // AddonManager.SCOPE_PROFILE + AddonManager.SCOPE_APPLICATION
    'extensions.autoDisableScopes': 0,
    'extensions.enabledScopes': 5,

    // Disable metadata caching for installed add-ons by default
    'extensions.getAddons.cache.enabled': false,

    // Disable installing any distribution extensions or add-ons.
    'extensions.installDistroAddons': false,

    // Disabled screenshots extension
    'extensions.screenshots.disabled': true,

    // Turn off extension updates so they do not bother tests
    'extensions.update.enabled': false,

    // Turn off extension updates so they do not bother tests
    'extensions.update.notifyUser': false,

    // Make sure opening about:addons will not hit the network
    'extensions.webservice.discoverURL': `http://${server}/dummy/discoveryURL`,

    // Allow the application to have focus even it runs in the background
    'focusmanager.testmode': true,

    // Disable useragent updates
    'general.useragent.updates.enabled': false,

    // Always use network provider for geolocation tests so we bypass the
    // macOS dialog raised by the corelocation provider
    'geo.provider.testing': true,

    // Do not scan Wifi
    'geo.wifi.scan': false,

    // No hang monitor
    'hangmonitor.timeout': 0,

    // Show chrome errors and warnings in the error console
    'javascript.options.showInConsole': true,

    // Disable download and usage of OpenH264: and Widevine plugins
    'media.gmp-manager.updateEnabled': false,

    // Disable the GFX sanity window
    'media.sanity-test.disabled': true,

    // Disable experimental feature that is only available in Nightly
    'network.cookie.sameSite.laxByDefault': false,

    // Do not prompt for temporary redirects
    'network.http.prompt-temp-redirect': false,

    // Disable speculative connections so they are not reported as leaking
    // when they are hanging around
    'network.http.speculative-parallel-limit': 0,

    // Do not automatically switch between offline and online
    'network.manage-offline-status': false,

    // Make sure SNTP requests do not hit the network
    'network.sntp.pools': server,

    // Disable Flash.
    'plugin.state.flash': 0,

    'privacy.trackingprotection.enabled': false,

    // Can be removed once Firefox 89 is no longer supported
    // https://bugzilla.mozilla.org/show_bug.cgi?id=1710839
    'remote.enabled': true,

    // Don't do network connections for mitm priming
    'security.certerrors.mitm.priming.enabled': false,

    // Local documents have access to all other local documents,
    // including directory listings
    'security.fileuri.strict_origin_policy': false,

    // Do not wait for the notification button security delay
    'security.notification_enable_delay': 0,

    // Ensure blocklist updates do not hit the network
    'services.settings.server': `http://${server}/dummy/blocklist/`,

    // Do not automatically fill sign-in forms with known usernames and
    // passwords
    'signon.autofillForms': false,

    // Disable password capture, so that tests that include forms are not
    // influenced by the presence of the persistent doorhanger notification
    'signon.rememberSignons': false,

    // Disable first-run welcome page
    'startup.homepage_welcome_url': 'about:blank',

    // Disable first-run welcome page
    'startup.homepage_welcome_url.additional': '',

    // Disable browser animations (tabs, fullscreen, sliding alerts)
    'toolkit.cosmeticAnimations.enabled': false,

    // Prevent starting into safe mode after application crashes
    'toolkit.startup.max_resumed_crashes': -1,
  };

  return Object.assign(defaultPrefs, extraPrefs);
}

async function backupFile(input: string): Promise<void> {
  if (!fs.existsSync(input)) {
    return;
  }
  await fs.promises.copyFile(input, input + '.puppeteer');
}

/**
 * Populates the user.js file with custom preferences as needed to allow
 * Firefox's support to properly function. These preferences will be
 * automatically copied over to prefs.js during startup of Firefox. To be
 * able to restore the original values of preferences a backup of prefs.js
 * will be created.
 */
async function syncPreferences(options: ProfileOptions): Promise<void> {
  const prefsPath = path.join(options.path, 'prefs.js');
  const userPath = path.join(options.path, 'user.js');

  const lines = Object.entries(options.preferences).map(([key, value]) => {
    return `user_pref(${JSON.stringify(key)}, ${JSON.stringify(value)});`;
  });

  // Use allSettled to prevent corruption.
  const result = await Promise.allSettled([
    backupFile(userPath).then(async () => {
      await fs.promises.writeFile(userPath, lines.join('\n'));
    }),
    backupFile(prefsPath),
  ]);
  for (const command of result) {
    if (command.status === 'rejected') {
      throw command.reason;
    }
  }
}

export function compareVersions(a: string, b: string): number {
  // TODO: this is a not very reliable check.
  return parseInt(a.replace('.', ''), 16) - parseInt(b.replace('.', ''), 16);
}