let migrationName = '20151105_tutorial_flags_v1';
let authorName = 'Alys'; // in case script author needs to know when their ...
let authorUuid = 'd904bd62-da08-416b-a816-ba797c9ee265'; // ... own data is done

/*
 * set flags.tutorial.ios and flags.tutorial.main flags to true in preparation
 * for the release of a new iOS tutorial
 *
 */

// var dbserver = 'localhost:27017' // FOR TEST DATABASE
let dbserver = 'alys:@ds031379-a0.mongolab.com:31379'; // FOR PRODUCTION DATABASE
let dbname = 'habitrpg';

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

let dbUsers = mongo.db(`${dbserver  }/${  dbname  }?auto_reconnect`).collection('users');

let fields = {
};


let query = {
  'auth.timestamps.loggedin': {$gt: new Date('2015-10-20')},
};

console.warn('Updating users...');
let progressCount = 1000;
let count = 0;
dbUsers.findEach(query, fields, {batchSize: 250}, function (err, user) {
  if (err) {
    return exiting(1, `ERROR! ${  err}`);
  }
  if (!user) {
    console.warn('All appropriate users found and modified.');
    return displayData();
  }
  count++;

  // var set = {'migration':migrationName, 'flags.tutorial.ios':true, 'flags.tutorial.main':true };
  let set = {migration: migrationName, 'flags.tutorial.ios': {} };

  dbUsers.update({_id: user._id}, {$set: set});

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


function displayData () {
  console.warn(`\n${  count  } users processed\n`);
  return exiting(0);
}


function exiting (code, msg) {
  code = code || 0; // 0 = success
  if (code && !msg) {
    msg = 'ERROR!';
  }
  if (msg) {
    if (code) {
      console.error(msg);
    } else      {
      console.log(msg);
    }
  }
  process.exit(code);
}