module NickFallbacks

# File lib/nick_fallbacks.rb, line 32
def expand(preferred:, bases:, static:, nicklen:, suffix: DEFAULT_SUFFIX)
  candidates = [preferred, *Array(bases).flat_map { |base| expand_base(base, nicklen: nicklen, suffix: suffix) }, *static]
  candidates.map { |nick| nick.to_s.strip }
            .reject(&:empty?)
            .select { |nick| nicklen.nil? || nick.length <= nicklen }
            .uniq
end

# File lib/nick_fallbacks.rb, line 16
def expand_base(base, nicklen:, suffix: DEFAULT_SUFFIX)
  base = base.to_s.strip
  suffix = suffix.to_s
  return [] if base.empty? || suffix.empty?
  return [] if nicklen && base.length > nicklen

  limit = nicklen || base.length
  variants = [base]
  current = base
  while current.length + suffix.length <= limit
    current += suffix
    variants << current
  end
  variants
end

# File lib/nick_fallbacks.rb, line 8
def numeric_nicklen(value, fallback: nil)
  return fallback if value.nil? || value == Float::INFINITY

  Integer(value)
rescue ArgumentError, TypeError
  fallback
end