/* global _gaq: true, ga: true */

var defaultSwitches = require("./switches");

module.exports = function(options) {
  options = options || {};
  options.elements = options.elements || "a[href], form[action]";
  options.selectors = options.selectors || ["title", ".js-Pjax"];
  options.switches = options.switches || {};
  options.switchesOptions = options.switchesOptions || {};
  options.history =
    typeof options.history === "undefined" ? true : options.history;
  options.analytics =
    typeof options.analytics === "function" || options.analytics === false
      ? options.analytics
      : defaultAnalytics;
  options.scrollTo =
    typeof options.scrollTo === "undefined" ? 0 : options.scrollTo;
  options.scrollRestoration =
    typeof options.scrollRestoration !== "undefined"
      ? options.scrollRestoration
      : true;
  options.cacheBust =
    typeof options.cacheBust === "undefined" ? true : options.cacheBust;
  options.debug = options.debug || false;
  options.timeout = options.timeout || 0;
  options.currentUrlFullReload =
    typeof options.currentUrlFullReload === "undefined"
      ? false
      : options.currentUrlFullReload;

  // We can’t replace body.outerHTML or head.outerHTML.
  // It creates a bug where a new body or head are created in the DOM.
  // If you set head.outerHTML, a new body tag is appended, so the DOM has 2 body nodes, and vice versa
  if (!options.switches.head) {
    options.switches.head = defaultSwitches.switchElementsAlt;
  }
  if (!options.switches.body) {
    options.switches.body = defaultSwitches.switchElementsAlt;
  }

  return options;
};

/* istanbul ignore next */
function defaultAnalytics() {
  if (window._gaq) {
    _gaq.push(["_trackPageview"]);
  }
  if (window.ga) {
    ga("send", "pageview", { page: location.pathname, title: document.title });
  }
}