import constants
import modes
import positions
from packet import Packet


class Text(object):
  def __init__(self, msg=None, label=None, size=None, position=None, mode=None):
    if label is None:
      label = "A"
    if size is None:
      size = 64
    if len(msg) > size:
      size = len(msg)
    if size > 125:
      size = 125
    if size < 1:
      size = 1
    if position is None:
      position = positions.MIDDLE_LINE
    if mode is None:
      mode = modes.ROTATE

    self.label = label
    self.size = size
    self.msg = msg
    self.position = position
    self.mode = mode

  def __str__(self):
    # [WRITE_TEXT][File Label][ESC][Display Position][Mode Code]
    #   [Special Specifier][ASCII Message]
    packet = Packet("%s%s%s%s%s%s" % (constants.WRITE_TEXT, self.label,
                                      constants.ESC,
                                      self.position,
                                      self.mode,
                                      self.msg))
    return str(packet)

  def __repr__(self):
    return repr(self.__str__())