class PseudIndexer < Indexer

  def self.klass
    "Pseud"
  end

  def self.mapping
    {
      properties: {
        name: {
          type: "text",
          analyzer: "simple"
        },
        # adding extra name field for sorting
        sortable_name: {
          type: "keyword"
        },
        byline: {
          type: "text",
          analyzer: "standard"
        },
        user_login: {
          type: "text",
          analyzer: "simple"
        },
        fandom: {
          type: "nested"
        }
      }
    }
  end

  def document(object)
    object.as_json(
      root: false,
      only: [:id, :user_id, :name, :description, :created_at],
      methods: [
        :user_login,
        :byline,
        :collection_ids
      ]
    ).merge(extras(object).as_json)
  end

  def extras(pseud)
    work_counts = work_counts(pseud)
    {
      sortable_name: pseud.name.downcase,
      fandoms: fandoms(pseud),
      general_bookmarks_count: general_bookmarks_count(pseud),
      public_bookmarks_count: public_bookmarks_count(pseud),
      general_works_count: work_counts.values.sum,
      public_works_count: work_counts[false] || 0
    }
  end

  private

  def fandoms(pseud)
    tag_info(pseud, "Fandom")
  end

  # Produces an array of hashes with the format
  # [{id: 1, name: "Star Trek", count: 5}]
  def tag_info(pseud, tag_type)
    info = []
    info +=
      pseud.direct_filters.where(works: countable_works_conditions)
        .by_type(tag_type).group_by(&:id)
        .map do |id, tags|
        {
          id: id,
          name: tags.first.name,
          count: tags.length
        }
      end
    info +=
      pseud.direct_filters.where(works: countable_works_conditions.merge(restricted: false))
        .by_type(tag_type).group_by(&:id)
        .map do |id, tags|
        {
          id_for_public: id,
          name: tags.first.name,
          count: tags.length
        }
      end
    info
  end

  # The relation containing all bookmarks that should be included in the count
  # for logged-in users (when restricted to a particular pseud).
  def general_bookmarks
    @general_bookmarks ||=
      Bookmark.with_missing_bookmarkable
        .or(Bookmark.with_bookmarkable_visible_to_registered_user)
        .is_public
  end

  # The relation containing all bookmarks that should be included in the count
  # for logged-out users (when restricted to a particular pseud).
  def public_bookmarks
    @public_bookmarks ||=
      Bookmark.with_missing_bookmarkable
        .or(Bookmark.with_bookmarkable_visible_to_all)
        .is_public
  end

  def general_bookmarks_count(pseud)
    general_bookmarks.merge(pseud.bookmarks).count
  end

  def public_bookmarks_count(pseud)
    public_bookmarks.merge(pseud.bookmarks).count
  end

  def work_counts(pseud)
    pseud.works.where(countable_works_conditions).group(:restricted).count
  end

  def countable_works_conditions
    {
      posted: true,
      hidden_by_admin: false,
      in_anon_collection: false,
      in_unrevealed_collection: false
    }
  end
end