class IRB::RelineInputMethod

def auto_indent(&block)
  @auto_indent_proc = block
end

def check_termination(&block)
  @check_termination_proc = block
end

def dynamic_prompt(&block)
  @prompt_proc = block
end

def encoding
  @stdin.external_encoding
end

def eof?
  @eof
end

def gets
  Reline.input = @stdin
  Reline.output = @stdout
  Reline.prompt_proc = @prompt_proc
  Reline.auto_indent_proc = @auto_indent_proc if @auto_indent_proc
  if l = Reline.readmultiline(@prompt, false, &@check_termination_proc)
    Reline::HISTORY.push(l) if !l.empty?
    @line[@line_no += 1] = l + "\n"
  else
    @eof = true
    l
  end
end

def initialize
  IRB.__send__(:set_encoding, Reline.encoding_system_needs.name, override: false)
  super
  @line_no = 0
  @line = []
  @eof = false
  @stdin = ::IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
  @stdout = ::IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
  Reline.basic_word_break_characters = IRB::InputCompletor::BASIC_WORD_BREAK_CHARACTERS
  Reline.completion_append_character = nil
  Reline.completer_quote_characters = ''
  Reline.completion_proc = IRB::InputCompletor::CompletionProc
  Reline.output_modifier_proc =
    if IRB.conf[:USE_COLORIZE]
      proc do |output, complete: |
        next unless IRB::Color.colorable?
        lvars = IRB.CurrentContext&.local_variables || []
        IRB::Color.colorize_code(output, complete: complete, local_variables: lvars)
      end
    else
      proc do |output|
        Reline::Unicode.escape_for_print(output)
      end
    end
  Reline.dig_perfect_match_proc = IRB::InputCompletor::PerfectMatchedProc
  Reline.autocompletion = IRB.conf[:USE_AUTOCOMPLETE]
  if IRB.conf[:USE_AUTOCOMPLETE]
    begin
      require 'rdoc'
      Reline.add_dialog_proc(:show_doc, SHOW_DOC_DIALOG, Reline::DEFAULT_DIALOG_CONTEXT)
    rescue LoadError
    end
  end
end

def inspect
  config = Reline::Config.new
  str = "RelineInputMethod with Reline #{Reline::VERSION}"
  inputrc_path = File.expand_path(config.inputrc_path)
  str += " and #{inputrc_path}" if File.exist?(inputrc_path)
  str
end

def line(line_no)
  @line[line_no]
end

def readable_after_eof?
  true
end

def support_history_saving?
  true
end