// descend.js

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

  /**
   * @augments {adventurejs.Verb}
   * @class descend
   * @ajsnode game.dictionary.verbs.descend
   * @ajsconstruct MyGame.createVerb({ "name": "descend", [...] });
   * @ajsconstructedby adventurejs.Dictionary#createVerb
   * @hideconstructor
   * @ajsinstanceof Verb
   * @ajsnavheading LocomotionVerbs
   * @summary Verb meaning descend or move down, as in "descend mountain".
   * @tutorial Scripting_VerbSubscriptions
   * @tutorial Verbs_VerbAnatomy
   * @tutorial Verbs_VerbProcess
   * @tutorial Verbs_ModifyVerbs
   * @tutorial Verbs_WriteVerbs
   * @classdesc
   * <pre class="display border outline">
   * <span class="input">&gt; descend mountain</span>
   * You take a deep sigh and begin your descent.
   * </pre>
   * <p>
   * <strong>Descent</strong> a
   * {@link adventurejs.Tangible|Tangible}
   * {@link adventurejs.Asset|Asset}.
   * Descent extends core verb <a href="go.html">go</a>
   * by inferring "go down".
   * </p>
   * @ajsverbreactions doRemoveThisFromThat, doRemoveThatFromThis, doMoveThisToThat, doMoveThatToThis
   * @ajsverbphases doBeforeTry, doAfterTry, doBeforeSuccess, doAfterSuccess
   */
  A.Preverbs.descend = {
    name: "descend",
    prettyname: "descend",
    past_tense: "descended",
    synonyms: ["descend"],
    type: { locomotion: true, travel: true },
    extends: { go: true },
    gerund: "descending",
    default_direction: "down",

    subject_must_be: {
      not_constrained: true,
    },

    /**
     * @ajsadverbs
     * @memberof descend
     */
    accepts_adverbs: [],

    /**
     * @ajsverbstructures
     * @memberof descend
     */
    accepts_structures: ["verb", "verb noun", "verb preposition noun"],

    /**
     * @memberof descend
     * @ajsverbphrase
     * phrase1:
     * {
     *   accepts_noun:true,
     *   noun_must_be:
     *   {
     *     tangible: true,
     *     known: true,
     *     present: true,
     *     visible: true,
     *     reachable: true,
     *   },
     *   accepts_preposition: true,
     *   preposition_must_be: ["down", "from", "off"],
     * },
     */
    phrase1: {
      accepts_noun: true,
      noun_must_be: {
        tangible: true,
        known: true,
        present: true,
        visible: true,
        reachable: true,
      },
      accepts_preposition: true,
      preposition_must_be: ["down", "from", "off"],
    },

    /**
     * @memberof descend
     * @ajsverbparams
     * with_params: {},
     */
    with_params: {},

    doTry: function () {
      var input = this.game.getInput();
      var verb_phrase = input.verb_phrase;

      input.setPreposition(1, "down");
      input.updateStructure();
      return this.game.dictionary.doVerb("go");
    },

    doSuccess: function () {
      return this.handleSuccess();
    },
  };
})(); // release