import os, setuptools, socketserver, sys, syslog, threading

SYSLOG = 0
STDOUT = 1
STDDEB = 2 # STDOUT + Debug
SILENT = 9 # Quiet mode

exec("logging = %s or STDOUT" % setuptools.getSetting("Log", "sink"))

def logger(message, prio=syslog.LOG_INFO, sink=logging):
 if sink in (STDOUT, STDDEB):
  if prio not in (syslog.LOG_NOTICE, syslog.LOG_INFO, syslog.LOG_DEBUG):
   print(message)
   sys.stderr.write(message)
  elif prio != syslog.LOG_DEBUG or sink == STDDEB:
   print(message)
 elif sink == SYSLOG:
  syslog.openlog("KumiStatusServer", syslog.LOG_PID)
  syslog.syslog(prio, message)
 elif sink != SILENT:
  try:
   sys.stderr.write("Unknown logging level %s, assuming STDOUT from now on." % str(sink))
  except:
   pass
  logging = STDOUT
  logger(message, prio, logging)

class TCPHandler(socketserver.StreamRequestHandler):
 def readString(self):
  return self.rfile.readline().strip()

 def sendString(self, string):
  self.request.sendall((string + "\n").encode('utf8'))

 def requestHandler(self, request):
  pass

 def worker(self, message):
  content = message.split()
  command = content[0].lower()
  if command in ("hi"):
   return "HI: Kumi Status v0.8.15 (KSP)"
  elif command in ("heartbeat", "hb", "ping"):
   return "OK: Still here? Wow."
  elif command in ("stat", "status"):
   return False
  elif command in ("ssl", "tls"):
   return False
  elif command in ("req", "request"):
   return "NI: Requesting monitoring is not yet implemented."
  elif command == "help":
   return False
  else:
   return "UC: Unknown command %s." % command

 def handle(self):
  remote = self.client_address[0] + ":" + str(self.client_address[1])
  logger("New connection from %s." % remote, syslog.LOG_INFO)
  self.sendString(self.worker("hi"))
  while True:
   message = self.readString().decode('utf8')
   if not message:
    logger("Connection from %s closed." % remote, syslog.LOG_DEBUG)
    break
   logger("%s said: %s" % (remote, message))
   response = self.worker(message)
   if response:
    self.sendString(response)
    logger("Sent to %s: %s" % (remote, response), syslog.LOG_DEBUG)

class TCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
 pass

def shutdown(reboot = False, status = 0):
 if reboot:
  args = sys.argv[:]
  args.insert(0, sys.executable)
  try:
   os.execv(sys.executable, args)
  except:
   logger("Restart failed. Shutting down.")
  exit(status)