module FFaker::Number

def decimal(whole_digits: 1, fractional_digits: 1)
  whole_part_pattern = generate_pattern(whole_digits)
  fractional_part_pattern = generate_pattern(fractional_digits).reverse
  FFaker.numerify("#{whole_part_pattern}.#{fractional_part_pattern}").to_f
end

def generate_pattern(digits)
  raise ArgumentError.new('Digits cannot be less than 1') if digits < 1
  "#{fetch_sample(1..9)}#{"#" * (digits - 1)}"
end

def number(digits: 1)
  FFaker.numerify(generate_pattern(digits)).to_i
end