class ReadlineLogger

  SLACK_EMOJI = ':ruby:'.freeze

  attr_reader :slack_channel

  def initialize slack_channel
    @slack_channel = slack_channel
  end

  def host_name
    @host_name ||= Socket.gethostname
  end

  def readline(prompt)
    Readline.readline(prompt).tap do |user_input|
      next unless user_input && user_input.length > 1
      unless ENV['SYNC_SLACK']
        # We use a new thread to not slow down the prompt
        Thread.new { notify(user_input) }
      else
        # We execute in the same thread for debugging
        notify(user_input)
      end
    end
  end

  def notify(user_input)
    SlackNotifier.new.send_slack_message(user_input, slack_channel, host_name, SLACK_EMOJI)
  end

  # Delegation to not break completion
  def completion_proc
    Readline.completion_proc
  end

  def completion_proc= proc
    Readline.completion_proc = proc
  end

end