#!/usr/bin/python3

from random import randint

continueyn = 'y'

while continueyn == 'y':

  validated = 0

  player = input('rock (r), paper(p) or scissors (s)?')
  if player == 'r' or player == 'p' or player == 's':
    validated = 1

  while validated == 0:
    player = input('Invalid! Please enter \'r\'ock, \'p\'aper, \'s\'cissors!')
    if player == 'r' or player == 'p' or player == 's':
      validated = 1


  print(player, 'vs ', end="", flush=True)

  chosenrand = randint(1,3) #1/r 2/p 3/s

  def cOne():
    print('r')
    if player == 'r':
      print('DRAW!')
    elif player == 'p':
      print('PLAYER WINS!')
    elif player == 's':
      print('COMPUTER WINS!')

  def cTwo():
    print('p')
    if player == 'r':
      print('COMPUTER WINS!')
    elif player == 'p':
      print('DRAW!')
    elif player == 's':
      print('PLAYER WINS!')

  def cThree():
    print('s')
    if player == 'r':
      print('PLAYER WINS!')
    elif player == 'p':
      print('COMPUTER WINS!')
    elif player == 's':
      print('DRAW!')

  if chosenrand == 1:
    cOne()
  elif chosenrand == 2:
    cTwo()
  elif chosenrand == 3:
    cThree()

  continueyn = 'j'

  while (continueyn != 'y') and (continueyn != 'n'):
    continueyn = input('continue? y/n')

  if continueyn == 'n':
    print('goodbye!')