"""

:organization: Logilab

:copyright: 2001-2010 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

"""

from __future__ import with_statement

from cubicweb import ValidationError

from cubicweb.devtools.testlib import CubicWebTC

from cubicweb.transaction import *

class UndoableTransactionTC(CubicWebTC):

    def setup_database(self):

        self.session.undo_actions = set('CUDAR')

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

                                     commit=False)

        self.txuuid = self.commit()

    def tearDown(self):

        self.restore_connection()

        self.session.undo_support = set()

        super(UndoableTransactionTC, self).tearDown()

    def test_undo_api(self):

        self.failUnless(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.failUnless(txinfo.datetime)

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

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

        actions = txinfo.actions_list()

        self.assertEquals(len(actions), 2)

        actions = txinfo.actions_list(public=False)

        self.assertEquals(len(actions), 6)

        a1 = actions[0]

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

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

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

        self.assertEquals(a1.changes, None)

        self.assertEquals(a1.public, True)

        self.assertEquals(a1.order, 1)

        a4 = actions[3]

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

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

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

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

        self.assertEquals(a4.order, 4)

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

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

            a = actions[i]

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

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

            self.assertEquals(a.rtype, rtype)

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

        # test undoable_transactions

        txs = self.cnx.undoable_transactions()

        self.assertEquals(len(txs), 1)

        self.assertEquals(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.assertEquals(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.delete()

        txuuid2 = self.commit()

        undoable_transactions = self.cnx.undoable_transactions

        txs = undoable_transactions(action='D')

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

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

        txs = undoable_transactions(action='C')

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

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

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

        txs = undoable_transactions(eid=toto.eid)

        self.assertEquals(len(txs), 3)

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

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

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

        txs = undoable_transactions(etype='CWUser')

        self.assertEquals(len(txs), 2)

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

        self.assertEquals(len(txs), 1)

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

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

        self.assertEquals(len(txs), 0)

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

                                    public=False)

        self.assertEquals(len(txs), 1)

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

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

        self.assertEquals(len(txs), 1)

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

        toto.delete()

        txuuid = self.commit()

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

        self.assertEquals(len(actions), 1)

        toto.clear_all_caches()

        e.clear_all_caches()

        errors = self.cnx.undo_transaction(txuuid)

        undotxuuid = self.commit()

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

        self.assertEquals(errors, [])

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

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

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

        self.assertEquals(toto.state, 'activated')

        self.assertEquals(toto.get_email(), 'toto@logilab.org')

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

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

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

                          ['users'])

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

                          ['CWUser'])

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

                          ['CWUser'])

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

        # transaction should be removed

        txs = self.cnx.undoable_transactions()

        self.assertEquals(len(txs), 2)

        self.assertRaises(NoSuchTransaction,

                          self.cnx.transaction_info, 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.failIf(cu.fetchall())

        cu = self.session.system_sql(

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

        self.failIf(cu.fetchall())

        # 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.delete()

        txuuid = self.commit()

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

        p.set_relations(fiche=c2)

        self.commit()

        errors = self.cnx.undo_transaction(txuuid)

        self.commit()

        p.clear_all_caches()

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

        self.assertEquals(len(errors), 1)

        self.assertEquals(errors[0],

                          "Can't restore object relation fiche to entity "

                          "%s which is already linked using this relation." % p.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.set_relations(in_group=g)

        self.commit()

        self.toto.delete()

        txuuid = self.commit()

        g.delete()

        self.commit()

        errors = self.cnx.undo_transaction(txuuid)

        self.assertRaises(ValidationError, self.commit)

    def test_undo_creation(self):

        # XXX what about relation / composite entities which have been created

        # afterwhile and linked to the undoed addition ?

        self.skip('not implemented')

    # test implicit 'replacement' of an inlined relation