#authenticateUser!/usr/bin/env python

import json
import cherrypy
from dm.common.utility.encoder import Encoder
from dm.common.exceptions.invalidRequest import InvalidRequest

from dm.common.service.dmSessionController import DmSessionController
from dm.ds_web_service.service.impl.authSessionControllerImpl import AuthSessionControllerImpl

class AuthSessionController(DmSessionController):

    def __init__(self):
        DmSessionController.__init__(self)
        self.authSessionControllerImpl = AuthSessionControllerImpl()

    @cherrypy.expose
    @DmSessionController.require(DmSessionController.isAdministrator())
    @DmSessionController.execute
    def getAuthorizationPrincipal(self, username, **kwargs):
        if not len(username):
            raise InvalidRequest('Invalid username provided.')
        response = self.authSessionControllerImpl.getAuthorizationPrincipal(username).getFullJsonRep()
        self.logger.debug('Returning authorization principal for %s' % (username))
        return response

    @cherrypy.expose
    @DmSessionController.require(DmSessionController.isAdministrator())
    @DmSessionController.execute
    def addSession(self, sessionId, **kwargs):
        if not len(sessionId):
            raise InvalidRequest('Invalid session id provided.')
        sessionInfo = kwargs.get('sessionInfo')
        if not sessionInfo:
            raise InvalidRequest('Missing session object.')
        sessionInfo = json.loads(Encoder.decode(sessionInfo))
        response = self.authSessionControllerImpl.addSession(sessionId, sessionInfo).getFullJsonRep()
        self.logger.debug('Session %s added to cache' % (sessionInfo))
        return response

    @cherrypy.expose
    @DmSessionController.require(DmSessionController.isAdministrator())
    @DmSessionController.execute
    def checkSession(self, sessionId, **kwargs):
        if not len(sessionId):
            raise InvalidRequest('Invalid session id provided.')
        response = self.authSessionControllerImpl.checkSession(sessionId).getFullJsonRep()
        self.logger.debug('Verified session %s' % (sessionId))
        return response