/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

/**
 * Bug 1950282 - UA spoof for f1tv.formula1.com
 *
 * This site is deliberately blocking Firefox, possibly due to bug 1992579.
 */

/* globals cloneInto, exportFunction */

console.info(
  "The window environment is being altered for compatibility reasons. If you're a web developer working on this site, please get in touch with developer-outreach@mozilla.com. See https://bugzilla.mozilla.org/show_bug.cgi?id=1950282 for details."
);

delete window.wrappedJSObject.InstallTrigger;
delete window.wrappedJSObject.mozInnerScreenX;
delete window.wrappedJSObject.mozInnerScreenY;
delete window.wrappedJSObject.MozConsentBanner;

const nav = Object.getPrototypeOf(navigator.wrappedJSObject);
const vendor = Object.getOwnPropertyDescriptor(nav, "vendor");
vendor.get = exportFunction(() => "Google Inc.", window);
Object.defineProperty(nav, "vendor", vendor);

const css = CSS.wrappedJSObject;
const supports = Object.getOwnPropertyDescriptor(css, "supports");
const oldSupports = supports.value;
supports.value = exportFunction(function (query) {
  if (query.includes("moz-")) {
    return false;
  }
  return oldSupports.call(this, query);
}, window);
Object.defineProperty(css, "supports", supports);

function generateTimeStamp(base, factor = 10) {
  if (base) {
    // increase another timestamp by a little
    return (base + Math.random() * factor).toString().substr(0, 14);
  }
  const r = Math.random().toString();
  const d10 = `1${r.substr(5, 9)}`;
  const d3 = r.substr(2, 3);
  return parseFloat(`${d10}.${d3}`);
}

const startLoadTime = generateTimeStamp();
const commitLoadTime = generateTimeStamp(startLoadTime);
const firstPaintTime = generateTimeStamp(commitLoadTime);
const finishDocumentLoadTime = generateTimeStamp(firstPaintTime);
const finishLoadTime = generateTimeStamp(finishDocumentLoadTime);

const csi = cloneInto(
  {
    onloadT: parseInt(finishDocumentLoadTime * 100),
    pageT: generateTimeStamp().toString().substr(-11),
    startE: parseInt(parseFloat(startLoadTime * 100)),
    tran: 10 + parseInt(4 + Math.random() * 4),
  },
  window
);

const loadTimes = cloneInto(
  {
    commitLoadTime,
    connectionInfo: "h3",
    finishDocumentLoadTime,
    finishLoadTime,
    firstPaintAfterLoadTime: 0,
    firstPaintTime,
    navigationType: "Other",
    npnNegotiatedProtocol: "h3",
    requestTime: startLoadTime,
    startLoadTime,
    wasAlternateProtocolAvailable: false,
    wasFetchedViaSpdy: true,
    wasNpnNegotiated: true,
  },
  window
);

window.wrappedJSObject.chrome = cloneInto(
  {
    app: {
      InstallState: {
        DISABLED: "disabled",
        INSTALLED: "installed",
        NOT_INSTALLED: "not_installed",
      },
      RunningState: {
        CANNOT_RUN: "cannot_run",
        READY_TO_RUN: "ready_to_run",
        RUNNING: "running",
      },
      getDetails() {
        return null;
      },
      getIsInstalled() {
        return false;
      },
      installState() {
        return undefined;
      },
      isInstalled: false,
      runningState() {
        return window.chrome.app.InstallState.NOT_INSTALLED;
      },
    },
    csi() {
      return csi;
    },
    loadTimes() {
      return loadTimes;
    },
  },
  window,
  { cloneFunctions: true }
);