"""

:organization: Logilab

:copyright: 2008-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

from logilab.common.testlib import TestCase, TestSkipped

try:

    import google.appengine

except ImportError:

    raise TestSkipped('Can not import google.appengine. Skip this module')

import os, os.path as osp

import time

from shutil import copy

# additional monkey patches necessary in regular cubicweb environment

from cubicweb.server import rqlannotation

from cubicweb.goa.overrides import rqlannotation as goarqlannotation

rqlannotation.SQLGenAnnotator = goarqlannotation.SQLGenAnnotator

rqlannotation.set_qdata = goarqlannotation.set_qdata

from google.appengine.api import apiproxy_stub_map

from google.appengine.api import datastore_file_stub

from google.appengine.ext import db as gdb

from cubicweb.devtools.fake import FakeRequest

from cubicweb.goa import db, do_monkey_patch

from cubicweb.goa.goavreg import GAEVRegistry

from cubicweb.goa.goaconfig import GAEConfiguration

from cubicweb.goa.dbinit import (create_user, create_groups, fix_entities,

                                 init_persistent_schema, insert_versions)

import logging

logger = logging.getLogger()

logger.setLevel(logging.CRITICAL)

do_monkey_patch()

class GAEBasedTC(TestCase):

    APP_ID = u'test_app'

    AUTH_DOMAIN = 'gmail.com'

    LOGGED_IN_USER = u't...@example.com'  # set to '' for no logged in user

    MODEL_CLASSES = None

    LOAD_APP_MODULES = None

    config = None

    _DS_TEMPL_FILE = 'tmpdb-template'

    def load_schema_hook(self, loader):

        loader.import_yams_cube_schema('data')

    @property

    def DS_FILE(self):

        return self.DS_TEMPL_FILE.replace('-template', '')

    @property

    def DS_TEMPL_FILE(self):

        return self._DS_TEMPL_FILE + '_'.join(sorted(cls.__name__ for cls in self.MODEL_CLASSES))

    def _set_ds_file(self, dsfile):

        # Start with a fresh api proxy.

        apiproxy_stub_map.apiproxy = apiproxy_stub_map.APIProxyStubMap()

        # Use a fresh stub datastore.

        stub = datastore_file_stub.DatastoreFileStub(self.APP_ID, dsfile,

                                                     dsfile+'.history')

        apiproxy_stub_map.apiproxy.RegisterStub('datastore_v3', stub)

    def setUp(self):

        # Ensure we're in UTC.

        os.environ['TZ'] = 'UTC'

        time.tzset()

        if osp.exists(self.DS_TEMPL_FILE):

            copy(self.DS_TEMPL_FILE, self.DS_FILE)

            need_ds_init = False

            self._set_ds_file(self.DS_FILE)

        else:

            need_ds_init = True

            self._set_ds_file(self.DS_TEMPL_FILE)

#         from google.appengine.api import mail_stub

#         from google3.apphosting.api import urlfetch_stub

#         from google3.apphosting.api import user_service_stub

#         # Use a fresh stub UserService.

#         apiproxy_stub_map.apiproxy.RegisterStub(

#             'user', user_service_stub.UserServiceStub())

        os.environ['AUTH_DOMAIN'] = self.AUTH_DOMAIN

        os.environ['USER_EMAIL'] = self.LOGGED_IN_USER

#         # Use a fresh urlfetch stub.

#         apiproxy_stub_map.apiproxy.RegisterStub(

#             'urlfetch', urlfetch_stub.URLFetchServiceStub())

#         # Use a fresh mail stub.

#         apiproxy_stub_map.apiproxy.RegisterStub(

#             'mail', mail_stub.MailServiceStub())

        if self.MODEL_CLASSES is None:

            raise Exception('GAEBasedTC should set MODEL_CLASSES class attribute')

        gdb._kind_map = {}

        self.config = self.config or GAEConfiguration('toto')

        self.config.init_log(logging.CRITICAL)

        self.schema = self.config.load_schema(self.MODEL_CLASSES,

                                              self.load_schema_hook)

        self.vreg = GAEVregistry(self.config)

        self.vreg.schema = self.schema

        self.vreg.load_module(db)

        from cubicweb.goa.appobjects import sessions

        self.vreg.load_module(sessions)

        from cubicweb.entities import authobjs, schemaobjs

        self.vreg.load_module(authobjs)

        self.vreg.load_module(schemaobjs)

        if self.config['use-google-auth']:

            from cubicweb.goa.appobjects import gauthservice

            self.vreg.load_module(gauthservice)

        if self.LOAD_APP_MODULES is not None:

            for module in self.LOAD_APP_MODULES:

                self.vreg.load_module(module)

        for cls in self.MODEL_CLASSES:

            self.vreg.register(cls)

        self.session_manager = self.vreg.select('components', 'sessionmanager')

        if need_ds_init:

            # create default groups and create entities according to the schema

            create_groups()

            if not self.config['use-google-auth']:

                create_user(self.LOGGED_IN_USER, 'toto', ('users', 'managers'))

                self.session = self.login(self.LOGGED_IN_USER, 'toto')

            else:

                req = FakeRequest(vreg=self.vreg)

                self.session = self.session_manager.open_session(req)

            self.user = self.session.user()

            ssession = self.config.repo_session(self.session.sessionid)

            ssession.set_pool()

            init_persistent_schema(ssession, self.schema)

            insert_versions(ssession, self.config)

            ssession.commit()

            fix_entities(self.schema)

            copy(self.DS_TEMPL_FILE, self.DS_FILE)

            self._set_ds_file(self.DS_FILE)

        else:

            if not self.config['use-google-auth']:

                self.session = self.login(self.LOGGED_IN_USER, 'toto')

            else:

                req = FakeRequest(vreg=self.vreg)

                self.session = self.session_manager.open_session(req)

            self.user = self.session.user()

    def tearDown(self):

        self.session.close()

    def request(self):

        req = FakeRequest(vreg=self.vreg)

        req.set_connection(self.session, self.user)

        return req

    def add_entity(self, etype, **kwargs):

        cu = self.session.cursor()

        rql = 'INSERT %s X' % etype

        if kwargs:

            rql += ': %s' % ', '.join('X %s %%(%s)s' % (key, key) for key in kwargs)

        rset = cu.execute(rql, kwargs)

        return rset.get_entity(0, 0)

    def execute(self, *args):

        return self.session.cursor().execute(*args)

    def commit(self):

        self.session.commit()

    def rollback(self):

        self.session.rollback()

    def create_user(self, login, groups=('users',), req=None):

        assert not self.config['use-google-auth']

        user = self.add_entity('CWUser', upassword=str(login), login=unicode(login))

        cu = self.session.cursor()

        cu.execute('SET X in_group G WHERE X eid %%(x)s, G name IN(%s)'

                    % ','.join(repr(g) for g in groups),

                    {'x': user.eid}, 'x')

        return user

    def login(self, login, password=None):

        assert not self.config['use-google-auth']

        req = FakeRequest(vreg=self.vreg)

        req.form['__login'] = login

        req.form['__password'] = password or login

        return self.session_manager.open_session(req)