//  node .migrations/20140823_remove_undefined_and_false_notifications.js

let migrationName = '20140823_remove_undefined_and_false_notifications';

let authorName = 'Alys'; // in case script author needs to know when their ...
let authorUuid = 'd904bd62-da08-416b-a816-ba797c9ee265'; // ... own data is done

// IMPORTANT NOTE: this migration was written when we were using version 3 of lodash.
// We've now upgraded to lodash v4 but the code used in this migration has not been
// adapted to work with it. Before this migration is used again any lodash method should
// be checked for compatibility against the v4 changelog and changed if necessary.
// https://github.com/lodash/lodash/wiki/Changelog#v400

/**
 * https://github.com/HabitRPG/habitrpg/pull/3907
 */

let mongo = require('mongoskin');
let _ = require('lodash');

// XXX @lefnire, choose wisely:
// var liveUsers = mongo.db('lefnire:mAdn3s5s@charlotte.mongohq.com:10015/habitrpg_large?auto_reconnect').collection('users');
// var liveUsers = mongo.db('localhost:27017/habitrpg_old?auto_reconnect').collection('users');

// For local testing by script author:
// var liveUsers = mongo.db('localhost:27017/habitrpg?auto_reconnect').collection('users');


let fields = {migration: 1, newMessages: 1};
let progressCount = 1000;
// var progressCount = 1;
let count = 0;
liveUsers.findEach({migration: {$ne: migrationName}}, fields, {batchSize: 250}, function (err, user) {
  count++;
  if (!user) err = '!user';
  if (err) {
    return console.error(err);
  }

  let newNewMessages = {};
  _.each(user.newMessages, function (val, key) {
    // console.log(key + " " + val.name);
    if (key != 'undefined' && val.value) {
      newNewMessages[key] = val;
    }
  });

  liveUsers.update({_id: user._id}, {$set: {newMessages: newNewMessages, migration: migrationName}, $inc: {_v: 1}});

  if (count % progressCount === 0) console.log(`${count  } ${  user._id}`);
  if (user._id === '9') console.log('lefnire processed');
  if (user._id === authorUuid) console.log(`${authorName  } processed`);
});