require_relative "signals/signal_list_comparison"
require_relative "labels/label_list_comparison"
require_relative "combined_list"

class Ecu
  class CombinedListComparison

    def initialize(left, right)

      # TODO: This could/should be more leaniant and convert
      # {Signal/Label}Lists on the fly to allow for comparison

      unless left.is_a?(CombinedList) && right.is_a?(CombinedList)
        fail "Can only merge CombinedList (left: #{left.class}, right: #{right.class})!"
      end

      @signal_comparison = SignalListComparison.new(left.signals, right.signals)
      @label_comparison  = LabelListComparison.new(left.labels, right.labels)
    end

    def names(spec)
      signal_comparison.names(spec) + label_comparison.names(spec)
    end

    def left_exclusive
      signal_comparison.left_exclusive + label_comparison.left_exclusive
    end

    def right_exclusive
      signal_comparison.right_exclusive + label_comparison.right_exclusive
    end

    def differences
      signal_comparison.differences + label_comparison.differences
    end

    def merge(priority: :right)
      CombinedList.new \
        signal_comparison.merge(priority: priority),
        label_comparison.merge(priority: priority),
        signal_comparison.headers,         # Both should merge headers the same
        signal_comparison.subheaders       # way, so it doesn't matter
    end

    private

    attr_reader :signal_comparison, :label_comparison

  end
end