//getWordCount.js
(function() {
  /*global adventurejs A*/ 
  "use strict";

	var p = adventurejs.Game.prototype;

  /**
   * <p>
   * <strong>getWordCount()</strong> is a utility method to get 
   * a count of all the unique words the game "knows".
   * </p>
   * @memberOf adventurejs.Game
   * @method adventurejs.Game#getWordCount
   * @kind function
   * @returns {Array} 
   */
	p.getWordCount = function Game_getWordCount()
  {
    let unique_words = [];
    let keys = Object.keys(this.world_lookup);
    for( let index in keys )
    { 
      let key = keys[index];
      let words = key.split(" "); 
      for(let ind in words)
      { 
        let word = words[ind];
        if( -1 === word.indexOf('_')
          && -1 === unique_words.indexOf(word)) unique_words.push(word);
      } 
    } 

    keys = Object.keys(this.dictionary.verb_lookup);
    for( let index in keys )
    { 
      let word = keys[index];
      if(-1 === unique_words.indexOf(word)) unique_words.push(word);
      let sins = this.dictionary.verb_lookup[word].synonyms;
      for( let s in sins )
      {
        let sin = sins[s];
        if(-1 === unique_words.indexOf(sin)) unique_words.push(sin);
      }
    } 

    unique_words = unique_words.concat( this.dictionary.adjectives );
    unique_words = unique_words.concat( this.dictionary.adverbs );
    unique_words = unique_words.concat( this.dictionary.prepositions );

    return(unique_words); 
  }    
}());