const { decorateWithTags } = require('./util');

const Comment = {
  hasParent({ parent_id }) {
    return !!parent_id;
  },
  parent({ parent_id }, _, { loaders: { Comments } }) {
    if (parent_id == null) {
      return null;
    }

    return Comments.get.load(parent_id);
  },
  user({ author_id }, _, { loaders: { Users } }) {
    return Users.getByID.load(author_id);
  },
  replies({ id, asset_id, reply_count }, { query }, { loaders: { Comments } }) {
    // Don't bother looking up replies if there aren't any there!
    if (reply_count === 0) {
      return {
        nodes: [],
        hasNextPage: false,
      };
    }

    query.asset_id = asset_id;
    query.parent_id = id;
    query.statuses = ['NONE', 'ACCEPTED'];

    return Comments.getByQuery(query);
  },
  replyCount({ reply_count }) {
    // A simple remap from the underlying database model to the graph model.
    return reply_count;
  },
  actions({ id }, _, { user, loaders: { Actions } }) {
    if (!user || !user.can('SEARCH_ACTIONS')) {
      return null;
    }

    return Actions.getByID.load(id);
  },
  action_summaries(comment, _, { loaders: { Actions } }) {
    if (comment.action_summaries) {
      return comment.action_summaries;
    }

    return Actions.getSummariesByItem.load(comment);
  },
  asset({ asset_id }, _, { loaders: { Assets } }) {
    return Assets.getByID.load(asset_id);
  },
  async editing(comment, _, { loaders: { Settings } }) {
    const settings = await Settings.load();
    const editableUntil = new Date(
      Number(new Date(comment.created_at)) + settings.editCommentWindowLength
    );
    return {
      edited: comment.edited,
      editableUntil: editableUntil,
    };
  },
};

// Decorate the Comment type resolver with a tags field.
decorateWithTags(Comment);

module.exports = Comment;