import cgi

class IllegalMethodException(BaseException):
 pass

class InvalidArgumentException(BaseException):
 pass

class Request:
 def __init__(self, env = None):
  if env:
   self.fromEnv(env)

 def fromEnv(self, env):
  if env["REQUEST_METHOD"] == "POST":
   self.args = cgi.parse_qs(env['wsgi.input'].readline().decode(), True)
  elif env["REQUEST_METHOD"] == "GET":
   self.args = cgi.parse_qs(env['QUERY_STRING'], True)
  else:
   raise IllegalMethodException()

  self.conn = False
  self.val = False
  self.cfrm = None
  self.cto = None

  self.json = "json" in self.args

  split = env["PATH_INFO"].split("/")
  split = [i.strip() for i in split]

  while "" in split:
   split.remove("")

  if len(split) > 2:
   output = "<h1>400 Bad Request</h1>\n"
   output += "Only one (validate) or two (conn) arguments may be passed as path."
   raise InvalidArgumentException(output)

  if len(split) > 0:
   if len(split) == 1:
    self.val = True
   else:
    self.conn = True
    self.cto = split[1].encode("latin-1").decode("utf-8")
   self.cfrm = split[0].encode("latin-1").decode("utf-8")

  try:
   self.rtype = "conn" if self.conn else "val" if self.val else self.args["type"][0].lower()
  except:
   output = "<h1>400 Bad Request</h1>\n"
   output += "A request type must be provided."
   raise InvalidArgumentException(output)