module Chicago
  module ETL
    module Screens
      class InvalidElement < ColumnScreen
        def self.for_columns(table_name, columns)
          screens = columns.select(&:elements).
            map {|column| new(table_name, column) }
          CompositeScreen.new(screens)
        end

        def severity
          3
        end

        def applies?(value)
          column.elements && 
            !column.elements.map(&:downcase).include?(value.to_s.downcase)
        end

        def error_hash(value)
          super(value).
            merge(:error_detail => "'#{value}' is not a valid value.")
        end
      end
    end
  end
end