class Byebug::SaveCommand

def description
  prettify <<-EOD
    save[ FILE]
    Saves current byebug state to FILE as a script file. This includes
    breakpoints, catchpoints, display expressions and some settings. If
    no filename is given, we will fabricate one.
    Use the "source" command in another debug session to restore them.
  EOD
end

def execute
  file = File.open(@match[1] || RESTART_FILE, 'w')
  save_breakpoints(file)
  save_catchpoints(file)
  save_displays(file)
  save_settings(file)
  print pr('save.messages.done', path: file.path)
  file.close
end

def names
  %w(save)
end

def regexp
  /^\s* sa(?:ve)? (?:\s+(\S+))? \s*$/x
end

def save_breakpoints(file)
  Byebug.breakpoints.each do |b|
    file.puts "break #{b.source}:#{b.pos}#{" if #{b.expr}" if b.expr}"
  end
end

def save_catchpoints(file)
  Byebug.catchpoints.keys.each do |c|
    file.puts "catch #{c}"
  end
end

def save_displays(file)
  @state.display.each { |d| file.puts "display #{d[1]}" if d[0] }
end

def save_settings(file)
  %w(autoeval autoirb autolist basename).each do |setting|
    file.puts "set #{setting} #{Setting[setting.to_sym]}"
  end
end