# Copyright (C) 2012-2022 Zammad Foundation, https://zammad-foundation.org/

class Sequencer
  class Unit
    module Import
      module Kayako
        module Mapping
          class CustomFields < Sequencer::Unit::Base
            include ::Sequencer::Unit::Import::Common::Mapping::Mixin::ProvideMapped

            uses :resource, :field_map, :model_class, :default_language

            def process
              provide_mapped do
                custom_fields || {}
              end
            end

            private

            def custom_fields
              resource['custom_fields']&.each_with_object({}) do |item, result|
                field = item['field']
                local_name = custom_fields_map[field['key']]

                next if local_name.nil? || item['value'].empty?

                field_type_instance = attribute_type_instance(field)

                result[ local_name.to_sym ] = field_type_instance.local_value(item['value'])
              end
            end

            def custom_fields_map
              @custom_fields_map ||= field_map[model_class.name]
            end

            def attribute_type_instance(field)
              "Sequencer::Unit::Import::Kayako::ObjectAttribute::AttributeType::#{field['type'].capitalize}".constantize.new(field, default_language)
            rescue
              nil
            end
          end
        end
      end
    end
  end
end