class Faker::Internet

def password(min_length: 8, max_length: 16, mix_case: true, special_characters: false)
  raise ArgumentError, 'min_length and max_length must be greater than or equal to one' if min_length < 1 || max_length < 1
  raise ArgumentError, 'min_length must be smaller than or equal to max_length' unless min_length <= max_length
  character_types = []
  required_min_length = 0
  if mix_case
    character_types << :mix_case
    required_min_length += 2
  end
  if special_characters
    character_types << :special_characters
    required_min_length += 1
  end
  raise ArgumentError, "min_length should be at least #{required_min_length} to enable #{character_types.join(', ')} configuration" if min_length < required_min_length
  target_length = rand(min_length..max_length)
  password = []
  character_bag = []
  # use lower_chars by default and add upper_chars if mix_case
  lower_chars = self::LLetters
  password << sample(lower_chars)
  character_bag += lower_chars
  digits = ('0'..'9').to_a
  password << sample(digits)
  character_bag += digits
  if mix_case
    upper_chars = self::ULetters
    password << sample(upper_chars)
    character_bag += upper_chars
  end
  if special_characters
    special_chars = %w[! @ # $ % ^ & *]
    password << sample(special_chars)
    character_bag += special_chars
  end
  password << sample(character_bag) while password.length < target_length
  shuffle(password).join
end