class Byebug::SetCommand

def description
  %{
    Modifies parts of byebug environment. Boolean values take on, off, 1
    or 0. You can see these environment settings with the "show" command
  }
end

def execute
  return print SetCommand.help(nil) if SetCommand.names.include?(@match[0])
  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$/
    level = get_int(args[0], "Set annotate", 0, 3, 0)
    if level
      Byebug.annotate = level
    else
      return
    end
  when /^args$/
    if defined?(Byebug::BYEBUG_SCRIPT)
      Command.settings[:argv][1..-1] = args
    else
      Command.settings[:argv] = args
    end
  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 /^testing$/
    Command.settings[:testing] = set_on
    Command.settings[:basename] = true if set_on
  when /^forcestep$/
    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$/
    listsize = get_int(args[0], "Set listsize", 1, nil, 10)
    return unless listsize
    self.class.settings[:listsize] = listsize
  when /^width$/
    width = get_int(args[0], "Set width", 10, nil, 80)
    return unless width
    Command.settings[:width] = width
    ENV['COLUMNS'] = width.to_s
  else
    return print "Unknown setting #{@match[1]}.\n"
  end
  return print "#{show_setting(subcmd.name)}\n"
end

def help(args)
  if args && args[1]
    subcmd = SetCommand.new(nil).find(Subcommands, args[1])
    if subcmd
      return "#{subcmd.short_help}.\n#{subcmd.long_help ? subcmd.long_help : ''}"
    else
      return "Invalid \"set\" subcommand \"#{args[1]}\".\n"
    end
  end
  description + SetCommand.new(nil).format_subcmds(Subcommands)
end

def names
  %w(set)
end

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