class Byebug::SetCommand

def description
  prettify <<-EOD
    set <setting> <value>
    Modifies parts of byebug environment.
    Boolean values take "on", "off", "true", "false", "1" or "0". If you
    don't specify a value, the boolean setting will be enabled.
    Conversely, you can use "set no<setting> to disable them.
    You can see these environment settings with the "show" command.
  EOD
end

def execute
  key, value = @match[:setting], @match[:value]
  return puts(SetCommand.help) if key.nil? && value.nil?
  setting = Setting.find(key)
  return errmsg(pr('set.errors.unknown_setting', key: key)) unless setting
  if !setting.boolean? && value.nil?
    value, err = nil, pr('set.errors.must_specify_value', key: key)
  elsif setting.boolean?
    value, err = get_onoff(value, key =~ /^no/ ? false : true)
  elsif setting.integer?
    value, err = get_int(value, setting.to_sym, 1)
  end
  return errmsg(err) if value.nil?
  setting.value = value
  puts setting.to_s
end

def get_onoff(arg, default)
  return default if arg.nil?
  case arg
  when '1', 'on', 'true'
    true
  when '0', 'off', 'false'
    false
  else
    [nil, pr('set.errors.on_off', arg: arg)]
  end
end

def help(subcmd = nil)
  Setting.help('set', subcmd)
end

def names
  %w(set)
end

def regexp
  /^\s* set (?:\s+(?<setting>\w+))? (?:\s+(?<value>\S+))? \s*$/x
end