# frozen_string_literal: true

require_relative 'acts_as_delta'

module HashDeepDiff
  module Delta
    # Representation of the pure left diff
    # i.e element that are missing in the hash on the right of the comparison
    # for example left diff of { a: a } and {} is { a: a }
    class Inner
      include Delta::ActsAsDelta

      def to_str
        if @delta.values.first.respond_to?(:to_hash)
          if @delta.values.first.keys == %i[left right]
            if @delta.values.first[:left].respond_to?(:to_hash) && @delta.values.first[:right].respond_to?(:to_hash)
              HashDeepDiff::Comparison.new(
                @delta.values.first[:left],
                @delta.values.first[:right],
                path
              ).report
            else
              lines = <<~Q
                -left#{diff_prefix} = #{@delta.values.first[:left]}
                +right#{diff_prefix} = #{@delta.values.first[:right]}
              Q
              lines.strip
            end
          else
            @delta.values.first.keys.map do |key|
              self.class.new(path: path + [key], value: @delta.values.first[key])
            end.join("\n").strip
          end
        else
          lines = <<~Q
            -left#{diff_prefix} = #{@delta.values.first[:left]}
            +right#{diff_prefix} = #{@delta.values.first[:right]}
          Q
          lines.strip
        end
      end
    end
  end
end