text: import os
  
  import flask
  from authlib.integrations.requests_client import OAuth2Session
  
  from flask import url_for
  from urllib.parse import urlencode, urljoin
  
  from requests import request
  
  
  from .auth import Auth
  
  COOKIE_EXPIRY = 60 * 60 * 24 * 14
  COOKIE_AUTH_USER_NAME = 'AUTH-USER'
  COOKIE_AUTH_ACCESS_TOKEN = 'AUTH-TOKEN'
  
  AUTH_STATE_KEY = 'auth_state'
  
  CLIENT_ID = os.environ.get('AUTH0_AUTH_CLIENT_ID')
  CLIENT_SECRET = os.environ.get('AUTH0_AUTH_CLIENT_SECRET')
  LOGOUT_URL = os.environ.get('AUTH0_LOGOUT_URL')
  AUTH_REDIRECT_URI = '/login/callback'
  
  AUTH_FLASK_ROUTES = os.environ.get('AUTH_FLASK_ROUTES',"false")
  if AUTH_FLASK_ROUTES == "true":
      AUTH_FLASK_ROUTES = True
  if AUTH_FLASK_ROUTES == "false":
      AUTH_FLASK_ROUTES = False
  else:
      print(f"warning: AUTH_FLASK_ROUTES is set to {AUTH_FLASK_ROUTES}. Must be 'true' or 'false', otherwise will raise this warning and be set to False.")
      AUTH_FLASK_ROUTES = False
  
  class Auth0Auth(Auth):
      def __init__(self, app):
          Auth.__init__(self, app)
          app.server.config['SECRET_KEY'] = os.environ.get('FLASK_SECRET_KEY')
          app.server.config['SESSION_TYPE'] = 'filesystem'
  
          @app.server.route('/login/callback')
          def callback():
              return self.login_callback()
  
          @app.server.route('/logout/')
          def logout():
              return self.logout()
  
      def is_authorized(self):
          user = flask.request.cookies.get(COOKIE_AUTH_USER_NAME)
          token = flask.request.cookies.get(COOKIE_AUTH_ACCESS_TOKEN)
          if not user or not token:
              return False
          return flask.session.get(user) == token
  
      def login_request(self):
          
          redirect_uri = urljoin(flask.request.base_url, AUTH_REDIRECT_URI) 
  
          session = OAuth2Session(
              CLIENT_ID,
              CLIENT_SECRET,
              scope=os.environ.get('AUTH0_AUTH_SCOPE'),
              redirect_uri=redirect_uri            
          )
          
          uri, state = session.create_authorization_url(
              os.environ.get('AUTH0_AUTH_URL'), 
              audience=os.environ.get('AUTH0_API_AUDIENCE')
          )
  
          flask.session['REDIRECT_URL'] = flask.request.url
          flask.session[AUTH_STATE_KEY] = state
          flask.session.permanent = False
  
          return flask.redirect(uri, code=302)
  
      def auth_wrapper(self, f):
          def wrap(*args, **kwargs):
              if AUTH_FLASK_ROUTES:
                  if not self.is_authorized():
                      return flask.Response(status=403)
              response = f(*args, **kwargs)
              return response
  
          return wrap
  
      def index_auth_wrapper(self, original_index):
          def wrap(*args, **kwargs):
              if self.is_authorized():
                  return original_index(*args, **kwargs)
              else:
                  return self.login_request()
          return wrap
  
      def login_callback(self):
          if 'error' in flask.request.args:
              if flask.request.args.get('error') == 'access_denied':
                  return 'You denied access.'
              return 'Error encountered.'
  
          if 'code' not in flask.request.args and 'state' not in flask.request.args:
              return self.login_request()
          else:
              # user is successfully authenticated
              auth0 = self.__get_auth(state=flask.session[AUTH_STATE_KEY])
              try:
                  token = auth0.fetch_token(
                      os.environ.get('AUTH0_AUTH_TOKEN_URI'),
                      client_secret=CLIENT_SECRET,
                      authorization_response=flask.request.url
                  )
                  print(token['id_token'])
                  print(token['access_token'])
              except Exception as e:
                  return e.__dict__
  
              auth0 = self.__get_auth(token=token)
              resp = auth0.get(os.environ.get('AUTH0_AUTH_USER_INFO_URL'))
              if resp.status_code == 200:
                  user_data = resp.json()
                  r = flask.redirect(flask.session['REDIRECT_URL'])
                  r.set_cookie(COOKIE_AUTH_USER_NAME, user_data['name'], max_age=COOKIE_EXPIRY)
                  r.set_cookie(COOKIE_AUTH_ACCESS_TOKEN, token['access_token'], max_age=COOKIE_EXPIRY)
                  flask.session[user_data['name']] = token['access_token']
                  return r
  
              return 'Could not fetch your information.'
  
      @staticmethod
      def __get_auth(state=None, token=None):
          if token:
              return OAuth2Session(CLIENT_ID, token=token)
          if state:
              return OAuth2Session(
                  CLIENT_ID,
                  state=state,
                  redirect_uri=urljoin(flask.request.base_url, AUTH_REDIRECT_URI)
              )
          return OAuth2Session(
              CLIENT_ID,
              redirect_uri=urljoin(flask.request.base_url, AUTH_REDIRECT_URI),
          )
  
      @staticmethod
      def logout():
          
          # Clear session stored data
          flask.session.clear()
          
          # Redirect user to logout endpoint
          return_url = flask.request.host_url
          params = {'returnTo': return_url, 'client_id': CLIENT_ID}
          r = flask.redirect(LOGOUT_URL + '?' + urlencode(params))
          r.delete_cookie(COOKIE_AUTH_USER_NAME)
          r.delete_cookie(COOKIE_AUTH_ACCESS_TOKEN)
          
          return r
  