# -*- coding: utf-8 -*-

# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

from cubicweb import ValidationError

from cubicweb.devtools.testlib import CubicWebTC

import cubicweb.server.session

from cubicweb.transaction import *

from cubicweb.server.sources.native import UndoTransactionException, _UndoException

class UndoableTransactionTC(CubicWebTC):

    def setup_database(self):

        req = self.request()

        self.toto = self.create_user(req, 'toto', password='toto', groups=('users',),

                                     commit=False)

        self.txuuid = self.commit()

    def setUp(self):

            """Force undo feature to be turned on in all case"""

            undo_actions = property(lambda tx: True, lambda x, y:None)

        super(UndoableTransactionTC, self).setUp()

    def tearDown(self):

        self.restore_connection()

        self.session.undo_support = set()

        super(UndoableTransactionTC, self).tearDown()

    def check_transaction_deleted(self, txuuid):

        # also check transaction actions have been properly deleted

        cu = self.session.system_sql(

            "SELECT * from tx_entity_actions WHERE tx_uuid='%s'" % txuuid)

        self.assertFalse(cu.fetchall())

        cu = self.session.system_sql(

            "SELECT * from tx_relation_actions WHERE tx_uuid='%s'" % txuuid)

        self.assertFalse(cu.fetchall())

    def assertUndoTransaction(self, txuuid, expected_errors=None):

        if expected_errors is None :

            expected_errors = []

        try:

            self.cnx.undo_transaction(txuuid)

        except UndoTransactionException as exn:

            errors = exn.errors

        else:

            errors = []

        self.assertEqual(errors, expected_errors)

    def test_undo_api(self):

        self.assertTrue(self.txuuid)

        # test transaction api

        self.assertRaises(NoSuchTransaction,

                          self.cnx.transaction_info, 'hop')

        self.assertRaises(NoSuchTransaction,

                          self.cnx.transaction_actions, 'hop')

        self.assertRaises(NoSuchTransaction,

                          self.cnx.undo_transaction, 'hop')

        txinfo = self.cnx.transaction_info(self.txuuid)

        self.assertTrue(txinfo.datetime)

        self.assertEqual(txinfo.user_eid, self.session.user.eid)

        self.assertEqual(txinfo.user().login, 'admin')

        actions = txinfo.actions_list()

        self.assertEqual(len(actions), 2)

        actions = txinfo.actions_list(public=False)

        self.assertEqual(len(actions), 6)

        a1 = actions[0]

        self.assertEqual(a1.action, 'C')

        self.assertEqual(a1.eid, self.toto.eid)

        self.assertEqual(a1.etype,'CWUser')

        self.assertEqual(a1.ertype, 'CWUser')

        self.assertEqual(a1.changes, None)

        self.assertEqual(a1.public, True)

        self.assertEqual(a1.order, 1)

        a4 = actions[3]

        self.assertEqual(a4.action, 'A')

        self.assertEqual(a4.rtype, 'in_group')

        self.assertEqual(a4.ertype, 'in_group')

        self.assertEqual(a4.eid_from, self.toto.eid)

        self.assertEqual(a4.eid_to, self.toto.in_group[0].eid)

        self.assertEqual(a4.order, 4)

        for i, rtype in ((1, 'owned_by'), (2, 'owned_by'),

                         (4, 'in_state'), (5, 'created_by')):

            a = actions[i]

            self.assertEqual(a.action, 'A')

            self.assertEqual(a.eid_from, self.toto.eid)

            self.assertEqual(a.rtype, rtype)

            self.assertEqual(a.order, i+1)

        # test undoable_transactions

        txs = self.cnx.undoable_transactions()

        self.assertEqual(len(txs), 1)

        self.assertEqual(txs[0].uuid, self.txuuid)

        # test transaction_info / undoable_transactions security

        cnx = self.login('anon')

        self.assertRaises(NoSuchTransaction,

                          cnx.transaction_info, self.txuuid)

        self.assertRaises(NoSuchTransaction,

                          cnx.transaction_actions, self.txuuid)

        self.assertRaises(NoSuchTransaction,

                          cnx.undo_transaction, self.txuuid)

        txs = cnx.undoable_transactions()

        self.assertEqual(len(txs), 0)

    def test_undoable_transactions(self):

        toto = self.toto

        e = self.session.create_entity('EmailAddress',

                                       address=u'toto@logilab.org',

                                       reverse_use_email=toto)

        txuuid1 = self.commit()

        toto.cw_delete()

        txuuid2 = self.commit()

        undoable_transactions = self.cnx.undoable_transactions

        txs = undoable_transactions(action='D')

        self.assertEqual(len(txs), 1, txs)

        self.assertEqual(txs[0].uuid, txuuid2)

        txs = undoable_transactions(action='C')

        self.assertEqual(len(txs), 2, txs)

        self.assertEqual(txs[0].uuid, txuuid1)

        self.assertEqual(txs[1].uuid, self.txuuid)

        txs = undoable_transactions(eid=toto.eid)

        self.assertEqual(len(txs), 3)

        self.assertEqual(txs[0].uuid, txuuid2)

        self.assertEqual(txs[1].uuid, txuuid1)

        self.assertEqual(txs[2].uuid, self.txuuid)

        txs = undoable_transactions(etype='CWUser')

        self.assertEqual(len(txs), 2)

        txs = undoable_transactions(etype='CWUser', action='C')

        self.assertEqual(len(txs), 1)

        self.assertEqual(txs[0].uuid, self.txuuid)

        txs = undoable_transactions(etype='EmailAddress', action='D')

        self.assertEqual(len(txs), 0)

        txs = undoable_transactions(etype='EmailAddress', action='D',

                                    public=False)

        self.assertEqual(len(txs), 1)

        self.assertEqual(txs[0].uuid, txuuid2)

        txs = undoable_transactions(eid=toto.eid, action='R', public=False)

        self.assertEqual(len(txs), 1)

        self.assertEqual(txs[0].uuid, txuuid2)

    def test_undo_deletion_base(self):

        toto = self.toto

        e = self.session.create_entity('EmailAddress',

                                       address=u'toto@logilab.org',

                                       reverse_use_email=toto)

        # entity with inlined relation

        p = self.session.create_entity('CWProperty',

                                       pkey=u'ui.default-text-format',

                                       value=u'text/rest',

                                       for_user=toto)

        self.commit()

        txs = self.cnx.undoable_transactions()

        self.assertEqual(len(txs), 2)

        toto.cw_delete()

        txuuid = self.commit()

        actions = self.cnx.transaction_info(txuuid).actions_list()

        self.assertEqual(len(actions), 1)

        toto.cw_clear_all_caches()

        e.cw_clear_all_caches()

        self.assertUndoTransaction(txuuid)

        undotxuuid = self.commit()

        self.assertEqual(undotxuuid, None) # undo not undoable

        self.assertTrue(self.execute('Any X WHERE X eid %(x)s', {'x': toto.eid}))

        self.assertTrue(self.execute('Any X WHERE X eid %(x)s', {'x': e.eid}))

        self.assertTrue(self.execute('Any X WHERE X has_text "toto@logilab"'))

        self.assertEqual(toto.cw_adapt_to('IWorkflowable').state, 'activated')

        self.assertEqual(toto.cw_adapt_to('IEmailable').get_email(), 'toto@logilab.org')

        self.assertEqual([(p.pkey, p.value) for p in toto.reverse_for_user],

                          [('ui.default-text-format', 'text/rest')])

        self.assertEqual([g.name for g in toto.in_group],

                          ['users'])

        self.assertEqual([et.name for et in toto.related('is', entities=True)],

                          ['CWUser'])

        self.assertEqual([et.name for et in toto.is_instance_of],

                          ['CWUser'])

        # undoing shouldn't be visble in undoable transaction, and the undone

        # transaction should be removed

        txs = self.cnx.undoable_transactions()

        self.assertEqual(len(txs), 2)

        self.assertRaises(NoSuchTransaction,

                          self.cnx.transaction_info, txuuid)

        self.check_transaction_deleted(txuuid)

        # the final test: check we can login with the previously deleted user

        self.login('toto')

    def test_undo_deletion_integrity_1(self):

        session = self.session

        # 'Personne fiche Card with' '??' cardinality

        c = session.create_entity('Card', title=u'hop', content=u'hop')

        p = session.create_entity('Personne', nom=u'louis', fiche=c)

        self.commit()

        c.cw_delete()

        txuuid = self.commit()

        c2 = session.create_entity('Card', title=u'hip', content=u'hip')

        p.cw_set(fiche=c2)

        self.commit()

        self.assertUndoTransaction(txuuid, [

            "Can't restore object relation fiche to entity "

            "%s which is already linked using this relation." % p.eid])

        self.commit()

        p.cw_clear_all_caches()

        self.assertEqual(p.fiche[0].eid, c2.eid)

    def test_undo_deletion_integrity_2(self):

        # test validation error raised if we can't restore a required relation

        session = self.session

        g = session.create_entity('CWGroup', name=u'staff')

        session.execute('DELETE U in_group G WHERE U eid %(x)s', {'x': self.toto.eid})

        self.toto.cw_set(in_group=g)

        self.commit()

        self.toto.cw_delete()

        txuuid = self.commit()

        g.cw_delete()

        self.commit()

        self.assertUndoTransaction(txuuid, [

            u"Can't restore relation in_group, object entity "

            "%s doesn't exist anymore." % g.eid])

        with self.assertRaises(ValidationError) as cm:

            self.commit()

        cm.exception.translate(unicode)

        self.assertEqual(cm.exception.entity, self.toto.eid)

        self.assertEqual(cm.exception.errors,

                          {'in_group-subject': u'at least one relation in_group is '

                           'required on CWUser (%s)' % self.toto.eid})

    def test_undo_creation_1(self):

        session = self.session

        c = session.create_entity('Card', title=u'hop', content=u'hop')

        p = session.create_entity('Personne', nom=u'louis', fiche=c)

        txuuid = self.commit()

        self.assertUndoTransaction(txuuid)

        self.commit()

        self.assertFalse(self.execute('Any X WHERE X eid %(x)s', {'x': c.eid}))

        self.assertFalse(self.execute('Any X WHERE X eid %(x)s', {'x': p.eid}))

        self.assertFalse(self.execute('Any X,Y WHERE X fiche Y'))

        self.session.set_cnxset()

        for eid in (p.eid, c.eid):

            self.assertFalse(session.system_sql(

                'SELECT * FROM entities WHERE eid=%s' % eid).fetchall())

            self.assertFalse(session.system_sql(

                'SELECT 1 FROM owned_by_relation WHERE eid_from=%s' % eid).fetchall())

            # added by sql in hooks (except when using dataimport)

            self.assertFalse(session.system_sql(

                'SELECT 1 FROM is_relation WHERE eid_from=%s' % eid).fetchall())

            self.assertFalse(session.system_sql(

                'SELECT 1 FROM is_instance_of_relation WHERE eid_from=%s' % eid).fetchall())

        self.check_transaction_deleted(txuuid)

    def test_undo_creation_integrity_1(self):

        session = self.session

        req = self.request()

        tutu = self.create_user(req, 'tutu', commit=False)

        txuuid = self.commit()

        email = self.request().create_entity('EmailAddress', address=u'tutu@cubicweb.org')

        prop = self.request().create_entity('CWProperty', pkey=u'ui.default-text-format',

                                            value=u'text/html')

        tutu.cw_set(use_email=email, reverse_for_user=prop)

        self.commit()

        with self.assertRaises(ValidationError) as cm:

            self.cnx.undo_transaction(txuuid)

        self.assertEqual(cm.exception.entity, tutu.eid)

        self.assertEqual(cm.exception.errors,

                          {None: 'some later transaction(s) touch entity, undo them first'})

    def test_undo_creation_integrity_2(self):

        session = self.session

        g = session.create_entity('CWGroup', name=u'staff')

        txuuid = self.commit()

        session.execute('DELETE U in_group G WHERE U eid %(x)s', {'x': self.toto.eid})

        self.toto.cw_set(in_group=g)

        self.commit()

        with self.assertRaises(ValidationError) as cm:

            self.cnx.undo_transaction(txuuid)

        self.assertEqual(cm.exception.entity, g.eid)

        self.assertEqual(cm.exception.errors,

                          {None: 'some later transaction(s) touch entity, undo them first'})

        # self.assertEqual(errors,

        #                   [u"Can't restore relation in_group, object entity "

        #                   "%s doesn't exist anymore." % g.eid])

        # with self.assertRaises(ValidationError) as cm: self.commit()

        # self.assertEqual(cm.exception.entity, self.toto.eid)

        # self.assertEqual(cm.exception.errors,

        #                   {'in_group-subject': u'at least one relation in_group is '

        #                    'required on CWUser (%s)' % self.toto.eid})

    # test implicit 'replacement' of an inlined relation

    def test_undo_inline_rel_remove_ok(self):

        """Undo remove relation  Personne (?) fiche (?) Card

        NB: processed by `_undo_r` as expected"""

        session = self.session

        c = session.create_entity('Card', title=u'hop', content=u'hop')

        p = session.create_entity('Personne', nom=u'louis', fiche=c)

        self.commit()

        p.cw_set(fiche=None)

        txuuid = self.commit()

        self.assertUndoTransaction(txuuid)

        self.commit()

        p.cw_clear_all_caches()

        self.assertEqual(p.fiche[0].eid, c.eid)

    def test_undo_inline_rel_remove_ko(self):

        """Restore an inlined relation to a deleted entity, with an error.

        NB: processed by `_undo_r` as expected"""

        session = self.session

        c = session.create_entity('Card', title=u'hop', content=u'hop')

        p = session.create_entity('Personne', nom=u'louis', fiche=c)

        self.commit()

        p.cw_set(fiche=None)

        txuuid = self.commit()

        c.cw_delete()

        self.commit()

        self.assertUndoTransaction(txuuid, [

            "Can't restore relation fiche, object entity %d doesn't exist anymore." % c.eid])

        self.commit()

        p.cw_clear_all_caches()

        self.assertFalse(p.fiche)

        self.assertIsNone(session.system_sql(

            'SELECT cw_fiche FROM cw_Personne WHERE cw_eid=%s' % p.eid).fetchall()[0][0])