# frozen_string_literal: true

module DigitalScriptorium
  # Special-purpose transformer for name (P14) claims
  class NameClaimTransformer
    include PropertyId

    def self.transform(claim, export_hash)
      return {} unless claim.qualifiers_by_property_id? ROLE_IN_AUTHORITY_FILE

      role_entity_id = claim.qualifier_by_property_id(ROLE_IN_AUTHORITY_FILE).entity_id_value
      role_item = export_hash[role_entity_id]
      role_label = role_item.label('en')
      prefix = role_label.downcase.split.last

      recorded_name = claim.data_value
      display_names = { 'PV' => recorded_name }
      search_names = [recorded_name]

      name_in_original_script = claim.qualifier_by_property_id(IN_ORIGINAL_SCRIPT)&.data_value&.value
      display_names['AGR'] = name_in_original_script if name_in_original_script
      search_names << name_in_original_script if name_in_original_script

      unless claim.qualifiers_by_property_id? NAME_IN_AUTHORITY_FILE
        return {
          "#{prefix}_display" => [display_names.to_json],
          "#{prefix}_search" => search_names,
          "#{prefix}_facet" => [recorded_name]
        }
      end

      display_entries = []
      facets = []

      claim.qualifiers_by_property_id(NAME_IN_AUTHORITY_FILE).each do |qualifier|
        display_names_for_qualifier = { 'PV' => recorded_name }
        display_names_for_qualifier['AGR'] = name_in_original_script if name_in_original_script

        name_entity_id = qualifier.entity_id_value
        name_item = export_hash[name_entity_id]
        name_label = name_item.label('en')

        display_names_for_qualifier['QL'] = name_label
        search_names << name_label
        facets << name_label

        wikidata_id = name_item.claim_by_property_id(WIKIDATA_QID).data_value
        wikidata_url = "https://www.wikidata.org/wiki/#{wikidata_id}"
        display_names_for_qualifier['QU'] = wikidata_url if wikidata_url

        display_entries << display_names_for_qualifier.to_json
      end

      {
        "#{prefix}_display" => display_entries.uniq,
        "#{prefix}_search" => search_names.uniq,
        "#{prefix}_facet" => facets.uniq
      }
    end
  end
end