(function () {
  "use strict";

  var root = this;
  if(typeof root.GOVUK === 'undefined') { root.GOVUK = {}; }

  /*
    Cookie methods
    ==============

    Usage:

      Setting a cookie:
      GOVUK.cookie('hobnob', 'tasty', { days: 30 });

      Reading a cookie:
      GOVUK.cookie('hobnob');

      Deleting a cookie:
      GOVUK.cookie('hobnob', null);
  */
  GOVUK.cookie = function (name, value, options) {
    if(typeof value !== 'undefined'){
      if(value === false || value === null) {
        return GOVUK.setCookie(name, '', { days: -1 });
      } else {
        return GOVUK.setCookie(name, value, options);
      }
    } else {
      return GOVUK.getCookie(name);
    }
  };
  GOVUK.setCookie = function (name, value, options) {
    if(typeof options === 'undefined') {
      options = {};
    }
    var cookieString = name + "=" + value + "; path=/";
    if (options.days) {
      var date = new Date();
      date.setTime(date.getTime() + (options.days * 24 * 60 * 60 * 1000));
      cookieString = cookieString + "; expires=" + date.toGMTString();
    }
    if (document.location.protocol == 'https:'){
      cookieString = cookieString + "; Secure";
    }
    document.cookie = cookieString;
  };
  GOVUK.getCookie = function (name) {
    var nameEQ = name + "=";
    var cookies = document.cookie.split(';');
    for(var i = 0, len = cookies.length; i < len; i++) {
      var cookie = cookies[i];
      while (cookie.charAt(0) == ' ') {
        cookie = cookie.substring(1, cookie.length);
      }
      if (cookie.indexOf(nameEQ) === 0) {
        return decodeURIComponent(cookie.substring(nameEQ.length));
      }
    }
    return null;
  };
}).call(this);