from mod_pywebsocket import msgutil

import time
import sys
import struct

# see the list of tests in test_websocket.html

def web_socket_do_extra_handshake(request):
  # must set request.ws_protocol to the selected version from ws_requested_protocols
  for x in request.ws_requested_protocols:
    if x != "test-does-not-exist":
      request.ws_protocol = x
      break

  if request.ws_protocol == "test-2.1":
    time.sleep(3)
  elif request.ws_protocol == "test-9":
    time.sleep(3)
  elif request.ws_protocol == "test-10":
    time.sleep(3)
  elif request.ws_protocol == "test-19":
    raise ValueError('Aborting (test-19)')
  elif request.ws_protocol == "test-20" or request.ws_protocol == "test-17":
    time.sleep(3)
  elif request.ws_protocol == "test-22":
    # The timeout is 5 seconds
    time.sleep(13)
  elif request.ws_protocol == "test-41b":
    request.sts = "max-age=100"
  else:
    pass

# Behave according to recommendation of RFC 6455, section # 5.5.1:
#  "When sending a Close frame in response, the endpoint typically echos the
#   status code it received."  
# - Without this, pywebsocket replies with 1000 to any close code.
#
#  Note that this function is only called when the client initiates the close
def web_socket_passive_closing_handshake(request):
  if request.ws_close_code == 1005:
    return None, None
  else:
    return request.ws_close_code, request.ws_close_reason


def web_socket_transfer_data(request):
  if request.ws_protocol == "test-2.1" or request.ws_protocol == "test-2.2":
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-6":
    resp = "wrong message"
    if msgutil.receive_message(request) == "1":
      resp = "2"
    msgutil.send_message(request, resp.decode('utf-8'))
    resp = "wrong message"
    if msgutil.receive_message(request) == "3":
      resp = "4"
    msgutil.send_message(request, resp.decode('utf-8'))
    resp = "wrong message"
    if msgutil.receive_message(request) == "5":
      resp = "あいうえお"
    msgutil.send_message(request, resp.decode('utf-8'))
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-7":
    msgutil.send_message(request, "test-7 data")
  elif request.ws_protocol == "test-10":
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-11":
    resp = "wrong message"
    if msgutil.receive_message(request) == "client data":
      resp = "server data"
    msgutil.send_message(request, resp.decode('utf-8'))
  elif request.ws_protocol == "test-12":
    msg = msgutil.receive_message(request)
    if msg ==  'a\ufffdb':
      # converted unpaired surrogate in UTF-16 to UTF-8 OK
      msgutil.send_message(request, "SUCCESS")
    else:
      msgutil.send_message(request, "FAIL got '" + msg 
          + "' instead of string with replacement char'")
  elif request.ws_protocol == "test-13":
    # first one binary message containing the byte 0x61 ('a')
    request.connection.write('\xff\x01\x61')
    # after a bad utf8 message
    request.connection.write('\x01\x61\xff')
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-14":
    msgutil.close_connection(request)
    msgutil.send_message(request, "server data")
  elif request.ws_protocol == "test-15":
    # DISABLED: close_connection hasn't supported 2nd 'abort' argument for a
    # long time.  Passing extra arg was causing exception, which conveniently
    # caused abort :) but as of pywebsocket v606 raising an exception here no
    # longer aborts, and there's no obvious way to close TCP connection w/o
    # sending websocket CLOSE.
    raise RuntimeError("test-15 should be disabled for now")
    #msgutil.close_connection(request, True)   # OBSOLETE 2nd arg
    return
  elif request.ws_protocol == "test-17" or request.ws_protocol == "test-21":
    time.sleep(2)
    resp = "wrong message"
    if msgutil.receive_message(request) == "client data":
      resp = "server data"
    msgutil.send_message(request, resp.decode('utf-8'))
    time.sleep(2)
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-20":
    msgutil.send_message(request, "server data")
    msgutil.close_connection(request)
  elif request.ws_protocol == "test-34":
    request.ws_stream.close_connection(1001, "going away now")
  elif request.ws_protocol == "test-35a":
    while not request.client_terminated:
      msgutil.receive_message(request)
    global test35code
    test35code = request.ws_close_code
    global test35reason
    test35reason = request.ws_close_reason
  elif request.ws_protocol == "test-35b":
    request.ws_stream.close_connection(test35code + 1, test35reason)
  elif request.ws_protocol == "test-37b":
    while not request.client_terminated:
      msgutil.receive_message(request)
    global test37code
    test37code = request.ws_close_code
    global test37reason
    test37reason = request.ws_close_reason
  elif request.ws_protocol == "test-37c":
    request.ws_stream.close_connection(test37code, test37reason)
  elif request.ws_protocol == "test-42":
    # Echo back 3 messages
    msgutil.send_message(request,
                         msgutil.receive_message(request))
    msgutil.send_message(request, 
                         msgutil.receive_message(request))
    msgutil.send_message(request, 
                         msgutil.receive_message(request))
  elif request.ws_protocol == "test-44":
    rcv = msgutil.receive_message(request)
    # check we received correct binary msg
    if len(rcv) == 3 \
       and ord(rcv[0]) == 5 and ord(rcv[1]) == 0 and ord(rcv[2]) == 7:
      # reply with binary msg 0x04
      msgutil.send_message(request, struct.pack("cc", chr(0), chr(4)), True, True)
    else:
      msgutil.send_message(request, "incorrect binary msg received!")
  elif request.ws_protocol == "test-45":
    rcv = msgutil.receive_message(request)
    # check we received correct binary msg
    if rcv == "flob":
      # send back same blob as binary msg
      msgutil.send_message(request, rcv, True, True)
    else:
      msgutil.send_message(request, "incorrect binary msg received: '" + rcv + "'")
  elif request.ws_protocol == "test-46":
    msgutil.send_message(request, "client must drop this if close was called")

  while not request.client_terminated:
    msgutil.receive_message(request)
