module Flipper
  module Gates
    class Boolean < Gate
      TruthMap = {
        true    => true,
        false   => false,
        'true'  => true,
        'false' => false,
      }

      # Internal: The name of the gate. Used for instrumentation, etc.
      def name
        :boolean
      end

      # Internal: Name converted to value safe for adapter.
      def key
        :boolean
      end

      def data_type
        :boolean
      end

      def description(value)
        if enabled?(value)
          'Enabled'
        else
          'Disabled'
        end
      end

      def enabled?(value)
        !!TruthMap[value]
      end

      # Internal: Checks if the gate is open for a thing.
      #
      # Returns true if explicitly set to true, false if explicitly set to false
      # or nil if not explicitly set.
      def open?(thing, value)
        instrument(:open?, thing) { |payload|
          !!TruthMap[value]
        }
      end

      def protects?(thing)
        thing.is_a?(Flipper::Types::Boolean)
      end
    end
  end
end