module Fakeit
  module Openapi
    module Example
      DEFAULT_BITS = 32

      def integer_example(example_options)
        if example_options[:use_static][type: "integer", property: example_options[:property]]
          static_integer_example
        else
          random_integer_example
        end
      end

      private

      def static_integer_example
        if enum
          enum.to_a.first
        else
          int_rand_end * int_multiple
        end
      end

      def random_integer_example
        if enum
          enum.to_a.sample
        else
          Faker::Number.between(from: int_rand_begin, to: int_rand_end) * int_multiple
        end
      end

      def int_rand_begin = (min_int / int_multiple) + int_rand_begin_adjust

      def int_rand_end = max_int / int_multiple

      def int_rand_begin_adjust = (min_int % int_multiple).zero? ? 0 : 1

      def int_multiple = multipleOf || 1

      def min_int
        if minimum
          exclusiveMinimum ? minimum + 1 : minimum
        else
          -2**(int_bits - 1)
        end
      end

      def max_int
        if maximum
          exclusiveMaximum ? maximum - 1 : maximum
        else
          (2**(int_bits - 1)) - 1
        end
      end

      def int_bits
        return DEFAULT_BITS unless /int\d+/.match?(format)

        format[/\d+/].to_i
      end
    end
  end
end
