//validateAssetList.js
/*global adventurejs A*/ 
"use strict";

/**
 * Serialize asset names in an array. Asset names may be nested 
 * inside objects in the array. A secondary effect of this function
 * is that it converts object properties from strings to arrays,
 * which corrects for cases of authors providing strings for 
 * properties that want arrays. For example: "skeleton key" 
 * would be converted to ["skeleton_key"].
 * @method adventurejs#validateAssetList
 * @memberOf adventurejs
 * @param {String|Array} property 
 * @returns {Array}
 */
adventurejs.validateAssetList = function Adventurejs_validateAssetList( property )
{
  if( "undefined" === typeof property ) return [];
  if( "string" === typeof property ) 
  {
    property = A.stringToArray( property );
  }

  if( Array.isArray( property ) ) 
  {

    for( var i = 0; i < property.length; i++ ) 
    {

      // ex: [ "id" ]
      if( "string" === typeof property[i] )
      {
        property[i] = A.serialize( property[i] );
      }

      // ex: [ {"id":['preposition']} ]
      else if( Object(property[i]) === property[i] )
      {
        for( var key in property[i] ){ 
          var value = property[i][key];
          var id = A.serialize( key );
          if( "string" === typeof value )
          {
            value = A.stringToArray( A.serialize(value) );
          }
          if( Array.isArray(value) || Object(value) === value ) 
          {
            value = A.validateAssetList( value );
          }
          delete property[i][key];
          property[i][id] = value;
        } 
      }

    }
  }

  // ex: [ {"id":['preposition']} ]
  else if( Object(property) === property )
  {
    for( var key in property ){ 
      var value = property[key];
      var id = A.serialize( key );
      if( "string" === typeof value )
      {
        value = A.stringToArray( A.serialize(value) );
      }
      else if( Array.isArray(value) || Object(value) === value ) 
      {
        value = A.validateAssetList( value );
      }
      delete property[key];
      property[id] = value;
    } 
  }

  return property;
};