module Ecoportal
  module API
    class V2
      class Page
        class Component
          class ReferenceField < Page::Component
            passthrough :register_id
            passarray   :references
            passboolean :hide_create, :hide_attach
            passboolean :hide_metadata, :hide_dashboards
            passboolean :display_fields, :display_fields_in_lookup

            def empty?
              reference_ids.empty?
            end

            def reference_ids
              references.map do |ref|
                ref["id"]
              end
            end

            def add(*ref_ids)
              doc["references"].tap do |refs|
                ref_ids.each do |ref_id|
                  next if reference_ids.include?(ref_id)
                  refs.push({
                    "id"        => ref_id,
                    "weight"    => 0,
                    "patch_ver" => 0
                  })
                end
              end
            end

            def clear
              delete(*reference_ids)
            end

            def delete(*ref_ids)
              ref_ids.each do |ref_id|
                doc_ref = doc["references"].find do |df|
                  df["id"] == ref_id
                end

                next unless doc_ref

                doc["references"].delete(doc_ref)
              end
            end

            def to_s(delimiter: "\n")
              reference_ids.to_a.join(delimiter)
            end

            # Quick config helper
            # @param conf [Symbol, Array<Symbol>]
            #   - `:show_fields` specify if the public register fields should be shown (requires `register_id`)
            #   - `:create` specify if the `NEW` button should appear
            #   - `:attach` specify if the `ATTACH` button should appear
            #   - `:metadata` specify if `metadata` should be shown (i.e. status)
            def configure(*conf)
              conf.each_with_object([]) do |cnf, unused|
                case cnf
                when :show_fields
                  self.display_fields = true
                  self.display_fields_in_lookup = true
                when Hash
                  supported = %i[create attach metadata]
                  rest      = hash_except(cnf.dup, *supported)

                  unused.push(rest) unless rest.empty?

                  self.hide_create   = !cnf[:create]   if cnf.key?(:create)
                  self.hide_attach   = !cnf[:attach]   if cnf.key?(:attach)
                  self.hide_metadata = !cnf[:metadata] if cnf.key?(:metadata)
                else
                  unused.push(cnf)
                end
              end.then do |unused|
                super(*unused)
              end
            end
          end
        end
      end
    end
  end
end