class Byebug::SetCommand

def execute
  # "Set" alone just prints subcommands
  return print_subcmds(Subcommands) unless @match[1]
  args = @match[1].split(/[ \t]+/)
  try_subcmd = args.shift
  try_subcmd.downcase!
  if try_subcmd =~ /^no/i
    set_on = false
    try_subcmd = try_subcmd[2..-1]
  else
    set_on = true
  end
  subcmd = find(Subcommands, try_subcmd)
  # Subcommand not found...
  return print "Unknown set command \"#{try_subcmd}\"\n" unless subcmd
  set_on = get_onoff(args[0]) if subcmd.is_bool and args.size > 0
  case subcmd.name
  when /^annotate$/
    level = get_int(args[0], "Set annotate", 0, 3, 0)
    if level
      Byebug.annotate = level
    else
      return
    end
    if defined?(Byebug::RDEBUG_SCRIPT)
      # byebug was called initially. 1st arg is script name.
      Command.settings[:argv][1..-1] = args
    else
      # byebug wasn't called initially. 1st arg is not script name.
      Command.settings[:argv] = args
    end
  when /^args$/
    Command.settings[:argv][1..-1] = args
  when /^autolist$/
    Command.settings[:autolist] = (set_on ? 1 : 0)
  when /^autoeval$/
    Command.settings[:autoeval] = set_on
  when /^basename$/
    Command.settings[:basename] = set_on
  when /^callstyle$/
    if args[0]
      arg = args[0].downcase.to_sym
      case arg
      when :short, :last, :tracked
        Command.settings[:callstyle] = arg
      else
        print "Invalid call style #{arg}. Should be one of: " \
              "'short', 'last' or 'tracked'.\n"
      end
    end
  when /^trace$/
    Command.settings[:stack_trace_on_error] = set_on
  when /^fullpath$/
    Command.settings[:full_path] = set_on
  when /^autoreload$/
    Command.settings[:reload_source_on_change] = set_on
  when /^autoirb$/
    Command.settings[:autoirb] = (set_on ? 1 : 0)
  when /^byebugtesting$/
    Command.settings[:byebugtesting] = set_on
    if set_on
      Command.settings[:basename] = true
    end
  when /^forcestep$/
    self.class.settings[:force_stepping] = set_on
  when /^history$/
    if 2 == args.size
      interface = @state.interface
      case args[0]
      when /^save$/
        interface.history_save = get_onoff(args[1])
      when /^size$/
        interface.history_length =
          get_int(args[1], "Set history size")
      when /^filename$/
        interface.histfile =
          File.join(ENV["HOME"]||ENV["HOMEPATH"]||".", args[1])
      else
        print "Invalid history parameter #{args[0]}. Should be " \
              "'filename', 'save' or 'size'.\n"
      end
    else
      print "Need two parameters for 'set history'; got " \
            "#{args.size}.\n"
      return
    end
  when /^linetrace\+$/
    self.class.settings[:tracing_plus] = set_on
  when /^linetrace$/
    Command.settings[:tracing] = set_on
  when /^listsize$/
    listsize = get_int(args[0], "Set listsize", 1, nil, 10)
    if listsize
      self.class.settings[:listsize] = listsize
    else
      return
    end
  when /^width$/
    width = get_int(args[0], "Set width", 10, nil, 80)
    if width
      self.class.settings[:width] = width
      ENV['COLUMNS'] = width.to_s
    else
      return
    end
  else
    return print "Unknown setting #{@match[1]}.\n"
  end
  return print "#{show_setting(subcmd.name)}\n"
end

def help(args)
  # specific subcommand help
  if args[1]
    subcmd = find(Subcommands, args[1])
    return "Invalid \"set\" subcommand \"#{args[1]}\"." unless subcmd
    str = subcmd.short_help + '.'
    str += "\n" + subcmd.long_help if subcmd.long_help
    return str
  end
  # general help
  s = %{
    Modifies parts of byebug environment. Boolean values take
    on, off, 1 or 0.
    You can see these environment settings with the \"show\" command.
    --
    List of set subcommands:
    --
  }
  for subcmd in Subcommands do
    s += "set #{subcmd.name} -- #{subcmd.short_help}\n"
  end
  return s
end

def help_command
  "set"
end

def regexp
  /^set (?: \s+ (.*) )?$/ix
end