# frozen_string_literal: true

module Coupdoeil
  class Hovercard
    class Option
      class Placement < Coupdoeil::Hovercard::Option
        self.bit_size = 4 * 4

        VALUES = %w[
          auto
          top top-start top-end
          right right-start right-end
          bottom bottom-start bottom-end
          left left-start left-end
        ].freeze
        INDEX_BY_VALUES = VALUES.each_with_index.to_h.with_indifferent_access.freeze

        class << self
          def parse(value)
            values = value.to_s.split(",")
            4.times.sum do |index|
              next 0 unless (placement = values[index])

              placement.strip!
              placement_index = INDEX_BY_VALUES[placement]
              placement_index << (index * 4)
            end
          end
        end

        def validate!
          values = value.to_s.split(",")

          values.each do |placement_value|
            next if placement_value.strip.in?(VALUES)

            values_sentence = VALUES.to_sentence(last_word_connector: " or ")
            raise_invalid_option "Value must be one of: #{values_sentence}"
          end
        end
      end
    end
  end
end