(function() {
  'use strict';

  window.utils = window.utils || {};

  var registeredSetupListeners = {};

  window.utils.setup = function(utilType, scope, options) {

    if (!utilType || !scope) {
      return;
    }

    options = options || {};

    var listener = function(event) {

      if (event.detail.targetUtil !== utilType) {
        return false;
      }

      if (options.setupFunction) {
        options.setupFunction(scope, options);
      } else {
        var util = window.utils[utilType];
        if (!util) {
          throw new Error('"' + utilType + '" is not a known js util');
        }

        util(scope, options);
      }
    };

    if (registeredSetupListeners[utilType] && !options.singleton) {
      registeredSetupListeners[utilType].push(listener);
    } else {
      window.utils.teardown(utilType);
      registeredSetupListeners[utilType] = [ listener ];
    }

    document.addEventListener('setup', listener);

    document.dispatchEvent(new CustomEvent('setup', {
      detail: { targetUtil: utilType, module: 'none' },
      bubbles: true,
      cancelable: true,
    }));
  };

  window.utils.teardown = function(utilType) {
    if (registeredSetupListeners[utilType]) {
      registeredSetupListeners[utilType].forEach(function(listener) {
        document.removeEventListener('setup', listener);
      });
      delete registeredSetupListeners[utilType];
    }
  }
})();