/*
 * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */

(function(scope) {

  // dom polyfill, additions, and utility methods

  var registry = {};

  HTMLElement.register = function(tag, prototype) {
    registry[tag] = prototype;
  };

  // get prototype mapped to node <tag>
  HTMLElement.getPrototypeForTag = function(tag) {
    var prototype = !tag ? HTMLElement.prototype : registry[tag];
    // TODO(sjmiles): creating <tag> is likely to have wasteful side-effects
    return prototype || Object.getPrototypeOf(document.createElement(tag));
  };

  // we have to flag propagation stoppage for the event dispatcher
  var originalStopPropagation = Event.prototype.stopPropagation;
  Event.prototype.stopPropagation = function() {
    this.cancelBubble = true;
    originalStopPropagation.apply(this, arguments);
  };
  
  
  // polyfill DOMTokenList
  // * add/remove: allow these methods to take multiple classNames
  // * toggle: add a 2nd argument which forces the given state rather
  //  than toggling.

  var add = DOMTokenList.prototype.add;
  var remove = DOMTokenList.prototype.remove;
  DOMTokenList.prototype.add = function() {
    for (var i = 0; i < arguments.length; i++) {
      add.call(this, arguments[i]);
    }
  };
  DOMTokenList.prototype.remove = function() {
    for (var i = 0; i < arguments.length; i++) {
      remove.call(this, arguments[i]);
    }
  };
  DOMTokenList.prototype.toggle = function(name, bool) {
    if (arguments.length == 1) {
      bool = !this.contains(name);
    }
    bool ? this.add(name) : this.remove(name);
  };
  DOMTokenList.prototype.switch = function(oldName, newName) {
    oldName && this.remove(oldName);
    newName && this.add(newName);
  };

  // add array() to NodeList, NamedNodeMap, HTMLCollection

  var ArraySlice = function() {
    return Array.prototype.slice.call(this);
  };

  var namedNodeMap = (window.NamedNodeMap || window.MozNamedAttrMap || {});

  NodeList.prototype.array = ArraySlice;
  namedNodeMap.prototype.array = ArraySlice;
  HTMLCollection.prototype.array = ArraySlice;

  // utility

  function createDOM(inTagOrNode, inHTML, inAttrs) {
    var dom = typeof inTagOrNode == 'string' ?
        document.createElement(inTagOrNode) : inTagOrNode.cloneNode(true);
    dom.innerHTML = inHTML;
    if (inAttrs) {
      for (var n in inAttrs) {
        dom.setAttribute(n, inAttrs[n]);
      }
    }
    return dom;
  }

  // exports

  scope.createDOM = createDOM;

})(Polymer);