module RaspbergPasswordOptions

# File lib/raspberg_password_options.rb, line 81
def charset_enabled?(lower:, upper:, numbers:, extra:, vowl:, custom:, custom_enabled:)
  return true if lower || upper || numbers || extra || vowl
  return custom_enabled && !custom.to_s.empty? if custom_enabled

  false
end

# File lib/raspberg_password_options.rb, line 88
def option_summary(opts)
  parts = ["length #{opts[:length]}"]
  parts << "lower" if opts[:lower]
  parts << "upper" if opts[:upper]
  parts << "numbers" if opts[:numbers]
  parts << "extra" if opts[:extra]
  parts << "vowl" if opts[:vowl]
  parts << "custom" if opts[:custom_enabled]
  parts << "count #{opts[:count]}" if opts[:count].to_i > 1
  parts
end

# File lib/raspberg_password_options.rb, line 13
def parse(text)
  opts = {
    length: DEFAULT_LENGTH,
    lower: true,
    upper: true,
    numbers: true,
    extra: false,
    vowl: false,
    custom: nil,
    custom_enabled: false,
    count: DEFAULT_COUNT
  }

  text.to_s.strip.split(/\s+/).each do |token|
    case token.downcase
    when "lower"
      opts[:lower] = true
    when "nolower"
      opts[:lower] = false
    when "upper"
      opts[:upper] = true
    when "noupper"
      opts[:upper] = false
    when "numbers"
      opts[:numbers] = true
    when "nonumbers"
      opts[:numbers] = false
    when "extra"
      opts[:extra] = true
    when "noextra"
      opts[:extra] = false
    when "vowl"
      opts[:vowl] = true
    when "novowl"
      opts[:vowl] = false
    else
      if (match = token.match(/\A(?:length|len|chars?)=(\d+)\z/i))
        opts[:length] = match[1].to_i
      elsif (match = token.match(/\Acount=(\d+)\z/i))
        opts[:count] = match[1].to_i
      elsif (match = token.match(/\Acustom=(.+)\z/i))
        opts[:custom] = match[1]
        opts[:custom_enabled] = !opts[:custom].empty?
      elsif token.match?(/\A\d+\z/)
        opts[:length] = token.to_i
      end
    end
  end

  opts[:custom] = opts[:custom].to_s[0, MAX_CUSTOM_LENGTH] if opts[:custom]
  opts
end

# File lib/raspberg_password_options.rb, line 66
def validate(length:, lower:, upper:, numbers:, extra:, vowl:, custom:, custom_enabled:)
  return "Please use a positive integer for the number of characters." if length < 1 || length > MAX_LENGTH

  unless charset_enabled?(lower: lower, upper: upper, numbers: numbers, extra: extra, vowl: vowl,
                          custom: custom, custom_enabled: custom_enabled)
    return "Select at least one character set (lower, upper, numbers, extra, vowl, or custom=chars)."
  end

  if !lower && !upper && !numbers && !extra && !vowl && custom_enabled && custom.to_s.empty?
    return "custom= requires at least one character."
  end

  nil
end