'use strict';

/**
 * This code is mostly from the old Etherpad. Please help us to comment this code.
 * This helps other people to understand this code better and helps them to improve it.
 * TL;DR COMMENTS ON THIS FILE ARE HIGHLY APPRECIATED
 */

/**
 * Copyright 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS-IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

const padmodals = require('./pad_modals').padmodals;

const padconnectionstatus = (() => {
  let status = {
    what: 'connecting',
  };

  const self = {
    init: () => {
      $('button#forcereconnect').click(() => {
        window.location.reload();
      });
    },
    connected: () => {
      status = {
        what: 'connected',
      };
      padmodals.showModal('connected');
      padmodals.hideOverlay();
    },
    reconnecting: () => {
      status = {
        what: 'reconnecting',
      };

      padmodals.showModal('reconnecting');
      padmodals.showOverlay();
    },
    disconnected: (msg) => {
      if (status.what === 'disconnected') return;

      status = {
        what: 'disconnected',
        why: msg,
      };

      // These message IDs correspond to localized strings that are presented to the user. If a new
      // message ID is added here then a new div must be added to src/templates/pad.html and the
      // corresponding l10n IDs must be added to the language files in src/locales.
      const knownReasons = [
        'badChangeset',
        'corruptPad',
        'deleted',
        'disconnected',
        'initsocketfail',
        'looping',
        'rateLimited',
        'rejected',
        'slowcommit',
        'unauth',
        'userdup',
      ];
      let k = String(msg);
      if (knownReasons.indexOf(k) === -1) {
        // Fall back to a generic message.
        k = 'disconnected';
      }

      padmodals.showModal(k);
      padmodals.showOverlay();
    },
    isFullyConnected: () => status.what === 'connected',
    getStatus: () => status,
  };
  return self;
})();

exports.padconnectionstatus = padconnectionstatus;
