let $, jQuery;
$ = jQuery = require('ep_etherpad-lite/static/js/rjquery').$;
const _ = require('underscore');

const pluginUtils = require('./shared');
const defs = require('./plugin_defs');

exports.baseURL = '';

exports.ensure = function (cb) {
  if (!defs.loaded) exports.update(cb);
  else cb();
};

exports.update = function (cb) {
  // It appears that this response (see #620) may interrupt the current thread
  // of execution on Firefox. This schedules the response in the run-loop,
  // which appears to fix the issue.
  const callback = function () { setTimeout(cb, 0); };
  $.ajaxSetup({cache: false});
  jQuery.getJSON(`${exports.baseURL}pluginfw/plugin-definitions.json`).done((data) => {
    defs.plugins = data.plugins;
    defs.parts = data.parts;
    defs.hooks = pluginUtils.extractHooks(defs.parts, 'client_hooks');
    defs.loaded = true;
    callback();
  }).fail((e) => {
    console.error(`Failed to load plugin-definitions: ${err}`);
    callback();
  });
};

function adoptPluginsFromAncestorsOf(frame) {
  // Bind plugins with parent;
  let parentRequire = null;
  try {
    while (frame = frame.parent) {
      if (typeof (frame.require) !== 'undefined') {
        parentRequire = frame.require;
        break;
      }
    }
  } catch (error) {
    // Silence (this can only be a XDomain issue).
  }
  if (parentRequire) {
    const ancestorPluginDefs = parentRequire('ep_etherpad-lite/static/js/pluginfw/plugin_defs');
    defs.hooks = ancestorPluginDefs.hooks;
    defs.loaded = ancestorPluginDefs.loaded;
    defs.parts = ancestorPluginDefs.parts;
    defs.plugins = ancestorPluginDefs.plugins;
    const ancestorPlugins = parentRequire('ep_etherpad-lite/static/js/pluginfw/client_plugins');
    exports.baseURL = ancestorPlugins.baseURL;
    exports.ensure = ancestorPlugins.ensure;
    exports.update = ancestorPlugins.update;
  } else {
    throw new Error('Parent plugins could not be found.');
  }
}

exports.adoptPluginsFromAncestorsOf = adoptPluginsFromAncestorsOf;