// conjugate.js

(function () {
  /* global AdventureJS A */

  var p = AdventureJS.Dictionary.prototype;

  /**
   * Conjugates the provided verb, taking into consideration
   * third-person singular present tense for subjects
   * using nonhuman / male / female pronouns (he/she/it)
   * or proper name.
   * @memberOf AdventureJS.Dictionary
   * @method AdventureJS.Dictionary#conjugate
   * @param {String} verb_name
   * @param {Object} target An optional target.
   */
  p.conjugate = function Dictionary_conjugate(verb_name, pronouns) {
    if (verb_name.name) verb_name = verb_name.name;
    if ("string" !== typeof verb_name) return "";
    const player = this.game.getPlayer();
    const subject = this.game.getInput().getSubject();
    const target = subject || player;
    const proper_name = target && target.id !== player.id && target.proper_name;
    let inflection;

    if (pronouns) {
      inflection = this.game.dictionary.inflections[pronouns];
    } else {
      inflection = this.game.dictionary.inflections[target.pronouns];
    }

    const third_person_singular =
      inflection.singular && inflection.person === "third";

    if (third_person_singular || (!pronouns && proper_name)) {
      return this.getThirdPersonSingular(verb_name);
    } else {
      return verb_name;
    }
  };
})();