// follow.js

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

  /**
   * @augments {adventurejs.Verb}
   * @class follow
   * @ajsnode game.dictionary.verbs.follow
   * @ajsconstruct MyGame.createVerb({ "name": "follow", [...] });
   * @ajsconstructedby adventurejs.Dictionary#createVerb
   * @hideconstructor
   * @ajsinstanceof Verb
   * @ajsnavheading InteractionVerbs
   * @summary Verb that means follow, as in "follow fox".
   * @tutorial BasicVerbs_Subscriptions
   * @tutorial AdvancedVerbs_VerbAnatomy
   * @tutorial AdvancedVerbs_VerbProcess
   * @tutorial AdvancedVerbs_ModifyVerbs
   * @tutorial AdvancedVerbs_ModifyVerbs
   * @classdesc
   * <pre class="display border outline">
   * <span class="ajs-player-input">&gt; follow fox</span>
   * You follow the fox. It leads you on a merry chase through the mall.
   * </pre>
   * <p>
   * Follow doesn't provide any special logic.
   * Authors wanting to make use of it may need
   * to use a method such as verb hooks. See
   * <a href="/doc/BasicVerbs_PhaseHooks.html">Verb Phases</a>
   * to learn more.
   * </p>
   * @todo follow character, follow character into thing
   * @ajsverbreactions
   * @ajsverbphases doBeforeTry, doAfterTry, doBeforeSuccess, doAfterSuccess
   */
  A.Preverbs.follow = {
    name: "follow",
    past_tense: "followed",
    synonyms: [],
    gerund: "following",
    can_try: true,

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

    /**
     * @memberof follow
     * @ajsverbphrase
     * phrase1:
     * {
     *   accepts_noun: true,
     *   noun_must_be:
     *   {
     *     known: true,
     *   },
     * },
     */
    phrase1: {
      accepts_noun: true,
      noun_must_be: { known: true },
    },

    /**
     * @memberof follow
     * @ajsverbphrase
     * phrase2:
     * {
     *   accepts_noun: true,
     *   noun_must_be:
     *   {
     *     known: true,
     *   },
     *   accepts_preposition: true,
     *   requires_preposition: true,
     * },
     */
    phrase2: {
      accepts_noun: true,
      noun_must_be: { known: true },
      accepts_preposition: true,
      requires_preposition: true,
      preposition_must_be: [
        "to",
        "through",
        "in",
        "on",
        "under",
        "behind",
        "over",
      ],
    },

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

    doTry: function () {
      var input = this.game.getInput();
      var subject = input.getSubject();
      var direct_object = input.getAsset(1);
      var direct_preposition = input.getPreposition(1);
      var indirect_object = input.getAsset(2);
      var indirect_preposition = input.getPreposition(2);
      var room = subject.getRoom();
      var msg = "";

      // verb enabled?
      if (!direct_object.isDOV(this.name)) {
        this.game.debug(
          `D1666`,
          `${this.name}.js `,
          `${direct_object.id}.dov.${this.name}.enabled is false `
        );
        msg += `{We} can't ${this.name} ${direct_object.article_name}. `;
        this.handleFailure(msg);
        return null;
      }

      // sentence structure: verb noun preposition noun
      if (input.hasStructure("verb noun preposition noun")) {
        // can indirect object be used?
        if (!indirect_object.isIOV(this.name)) {
          this.game.debug(
            `D1684`,
            `${this.name}.js `,
            ` ${indirect_object.id}.iov.${this.name}.enabled is false `
          );
          msg += `${indirect_object.Article_name} doesn't appear to be edible. `;
          this.handleFailure(msg);
          return false;
        }

        // single use indirect object?
        if (
          indirect_object.allowVerbOnce(this.name, "iov") &&
          indirect_object.iDidVerb(this.name, "iov")
        ) {
          this.game.debug(
            `D1691`,
            `${this.name}.js `,
            ` ${indirect_object.id}.iov.${
              this.name
            }.once and ${indirect_object.id}.did.${this.name}.indirectly is ${
              indirect_object.did[this.name].indirectly
            } `
          );
          msg += `${indirect_object.Article_name} has already been eaten enough. `;
          this.handleFailure(msg);
          return null;
        }
      }

      return true;
    },

    doSuccess: function () {
      var input = this.game.getInput();
      var subject = input.getSubject();
      var direct_object = input.getAsset(1);
      var direct_preposition = input.getPreposition(1);
      var indirect_object = input.getAsset(2);
      var indirect_preposition = input.getPreposition(2);
      var room = subject.getRoom();
      var results;
      var msg = "";

      // compose output
      msg +=
        `{We} ${this.agree()}` +
        (direct_preposition ? " " + direct_preposition : "") +
        (" " + direct_object.article_name) +
        (indirect_preposition ? " " + indirect_preposition : "") +
        (indirect_object ? " " + indirect_object.article_name : "") +
        `. `;

      // --------------------------------------------------
      // print output
      // --------------------------------------------------
      return this.handleSuccess(msg);
    },
  };
})();