/*jshint -W054 */
;(function (exports) {
  'use strict';

  var lists = exports.humanReadableIds || require('./lists')
    , shuffle = exports.knuthShuffle || require('knuth-shuffle').knuthShuffle
    , animals = []
    , adjectives = []
    , numbers = []
  ;

  function genNumbers() {
    var i = 2
    ;

    numbers = [];
    numbers.push(0);
    // 1 is not plural, so we skip it
    for (i = 2; i <= 100; i += 1) {
      numbers.push(i);
    }

    return shuffle(numbers);
  }

  function populate() {
    if (!adjectives.length) {
      adjectives = shuffle(lists.adjectives.slice(0));
    }
    if (!animals.length) {
      animals = shuffle(lists.animals.slice(0));
    }
    if (!numbers.length) {
      numbers = shuffle(genNumbers());
    }
  }

  function random() {
    populate();
    return adjectives.pop()
      + '-' + animals.pop()
      + '-' + numbers.pop()
      ;
  }

  // Accepts a format as a stirng of 'a' for adjective, 'n' for noun, and '#' for number
  function get(format) {
    populate();
    let hri = [];
    for (let item of format) {
      switch (item) {
        case 'a':
          hri.push(adjectives.pop());
          break;
        case 'n':
          hri.push(animals.pop());
          break;
        case '#':
          hri.push(numbers.pop());
          break;
        default:
          throw 'Unexpected value ' + item + '. Expected a,n,#';
      }
    }

    return hri.join('-');
  }

  exports.humanReadableIds = {random: random, get: get};
  exports.hri = exports.humanReadableIds;

}('undefined' !== typeof exports && exports || new Function('return this')()));