# copyright 2003-2011 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/>.

"""unit tests for selectors mechanism"""

from __future__ import with_statement

from operator import eq, lt, le, gt

from logilab.common.testlib import TestCase, unittest_main

from cubicweb import Binary

from cubicweb.devtools.testlib import CubicWebTC

from cubicweb.appobject import Selector, AndSelector, OrSelector

from cubicweb.selectors import (is_instance, adaptable, match_user_groups,

                                multi_lines_rset, score_entity, is_in_state,

                                on_transition, rql_condition, relation_possible)

from cubicweb.web import action

class _1_(Selector):

    def __call__(self, *args, **kwargs):

        return 1

class _0_(Selector):

    def __call__(self, *args, **kwargs):

        return 0

def _2_(*args, **kwargs):

    return 2

class SelectorsTC(TestCase):

    def test_basic_and(self):

        selector = _1_() & _1_()

        self.assertEqual(selector(None), 2)

        selector = _1_() & _0_()

        self.assertEqual(selector(None), 0)

        selector = _0_() & _1_()

        self.assertEqual(selector(None), 0)

    def test_basic_or(self):

        selector = _1_() | _1_()

        self.assertEqual(selector(None), 1)

        selector = _1_() | _0_()

        self.assertEqual(selector(None), 1)

        selector = _0_() | _1_()

        self.assertEqual(selector(None), 1)

        selector = _0_() | _0_()

        self.assertEqual(selector(None), 0)

    def test_selector_and_function(self):

        selector = _1_() & _2_

        self.assertEqual(selector(None), 3)

        selector = _2_ & _1_()

        self.assertEqual(selector(None), 3)

    def test_three_and(self):

        selector = _1_() & _1_() & _1_()

        self.assertEqual(selector(None), 3)

        selector = _1_() & _0_() & _1_()

        self.assertEqual(selector(None), 0)

        selector = _0_() & _1_() & _1_()

        self.assertEqual(selector(None), 0)

    def test_three_or(self):

        selector = _1_() | _1_() | _1_()

        self.assertEqual(selector(None), 1)

        selector = _1_() | _0_() | _1_()

        self.assertEqual(selector(None), 1)

        selector = _0_() | _1_() | _1_()

        self.assertEqual(selector(None), 1)

        selector = _0_() | _0_() | _0_()

        self.assertEqual(selector(None), 0)

    def test_composition(self):

        selector = (_1_() & _1_()) & (_1_() & _1_())

        self.failUnless(isinstance(selector, AndSelector))

        self.assertEqual(len(selector.selectors), 4)

        self.assertEqual(selector(None), 4)

        selector = (_1_() & _0_()) | (_1_() & _1_())

        self.failUnless(isinstance(selector, OrSelector))

        self.assertEqual(len(selector.selectors), 2)

        self.assertEqual(selector(None), 2)

    def test_search_selectors(self):

        sel = is_instance('something')

        self.assertIs(sel.search_selector(is_instance), sel)

        csel = AndSelector(sel, Selector())

        self.assertIs(csel.search_selector(is_instance), sel)

        csel = AndSelector(Selector(), sel)

        self.assertIs(csel.search_selector(is_instance), sel)

        self.assertIs(csel.search_selector((AndSelector, OrSelector)), csel)

        self.assertIs(csel.search_selector((OrSelector, AndSelector)), csel)

        self.assertIs(csel.search_selector((is_instance, score_entity)),  sel)

        self.assertIs(csel.search_selector((score_entity, is_instance)), sel)

    def test_inplace_and(self):

        selector = _1_()

        selector &= _1_()

        selector &= _1_()

        self.assertEqual(selector(None), 3)

        selector = _1_()

        selector &= _0_()

        selector &= _1_()

        self.assertEqual(selector(None), 0)

        selector = _0_()

        selector &= _1_()

        selector &= _1_()

        self.assertEqual(selector(None), 0)

        selector = _0_()

        selector &= _0_()

        selector &= _0_()

        self.assertEqual(selector(None), 0)

    def test_inplace_or(self):

        selector = _1_()

        selector |= _1_()

        selector |= _1_()

        self.assertEqual(selector(None), 1)

        selector = _1_()

        selector |= _0_()

        selector |= _1_()

        self.assertEqual(selector(None), 1)

        selector = _0_()

        selector |= _1_()

        selector |= _1_()

        self.assertEqual(selector(None), 1)

        selector = _0_()

        selector |= _0_()

        selector |= _0_()

        self.assertEqual(selector(None), 0)

class ImplementsSelectorTC(CubicWebTC):

    def test_etype_priority(self):

        req = self.request()

        f = req.create_entity('File', data_name=u'hop.txt', data=Binary('hop'))

        rset = f.as_rset()

        anyscore = is_instance('Any')(f.__class__, req, rset=rset)

        idownscore = adaptable('IDownloadable')(f.__class__, req, rset=rset)

        self.failUnless(idownscore > anyscore, (idownscore, anyscore))

        filescore = is_instance('File')(f.__class__, req, rset=rset)

        self.failUnless(filescore > idownscore, (filescore, idownscore))

    def test_etype_inheritance_no_yams_inheritance(self):

        cls = self.vreg['etypes'].etype_class('Personne')

        self.failIf(is_instance('Societe').score_class(cls, self.request()))

    def test_yams_inheritance(self):

        cls = self.vreg['etypes'].etype_class('Transition')

        self.assertEqual(is_instance('BaseTransition').score_class(cls, self.request()),

                          3)

class WorkflowSelectorTC(CubicWebTC):

    def _commit(self):

        self.commit()

        self.wf_entity.cw_clear_all_caches()

    def setup_database(self):

        wf = self.shell().add_workflow("wf_test", 'StateFull', default=True)

        created   = wf.add_state('created', initial=True)

        validated = wf.add_state('validated')

        abandoned = wf.add_state('abandoned')

        wf.add_transition('validate', created, validated, ('managers',))

        wf.add_transition('forsake', (created, validated,), abandoned, ('managers',))

    def setUp(self):

        super(WorkflowSelectorTC, self).setUp()

        self.req = self.request()

        self.wf_entity = self.req.create_entity('StateFull', name=u'')

        self.rset = self.wf_entity.as_rset()

        self.adapter = self.wf_entity.cw_adapt_to('IWorkflowable')

        self._commit()

        self.assertEqual(self.adapter.state, 'created')

        # enable debug mode to state/transition validation on the fly

        self.vreg.config.debugmode = True

    def tearDown(self):

        self.vreg.config.debugmode = False

        super(WorkflowSelectorTC, self).tearDown()

    def test_is_in_state(self):

        for state in ('created', 'validated', 'abandoned'):

            selector = is_in_state(state)

            self.assertEqual(selector(None, self.req, rset=self.rset),

                             state=="created")

        self.adapter.fire_transition('validate')

        self._commit()

        self.assertEqual(self.adapter.state, 'validated')

        selector = is_in_state('created')

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = is_in_state('validated')

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        selector = is_in_state('validated', 'abandoned')

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        selector = is_in_state('abandoned')

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        self.adapter.fire_transition('forsake')

        self._commit()

        self.assertEqual(self.adapter.state, 'abandoned')

        selector = is_in_state('created')

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = is_in_state('validated')

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = is_in_state('validated', 'abandoned')

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        self.assertEqual(self.adapter.state, 'abandoned')

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

    def test_is_in_state_unvalid_names(self):

        selector = is_in_state("unknown")

        with self.assertRaises(ValueError) as cm:

            selector(None, self.req, rset=self.rset)

        self.assertEqual(str(cm.exception),

                         "wf_test: unknown state(s): unknown")

        selector = is_in_state("weird", "unknown", "created", "weird")

        with self.assertRaises(ValueError) as cm:

            selector(None, self.req, rset=self.rset)

        self.assertEqual(str(cm.exception),

                         "wf_test: unknown state(s): unknown,weird")

    def test_on_transition(self):

        for transition in ('validate', 'forsake'):

            selector = on_transition(transition)

            self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        self.adapter.fire_transition('validate')

        self._commit()

        self.assertEqual(self.adapter.state, 'validated')

        selector = on_transition("validate")

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        selector = on_transition("validate", "forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        selector = on_transition("forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        self.adapter.fire_transition('forsake')

        self._commit()

        self.assertEqual(self.adapter.state, 'abandoned')

        selector = on_transition("validate")

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = on_transition("validate", "forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

        selector = on_transition("forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 1)

    def test_on_transition_unvalid_names(self):

        selector = on_transition("unknown")

        with self.assertRaises(ValueError) as cm:

            selector(None, self.req, rset=self.rset)

        self.assertEqual(str(cm.exception),

                         "wf_test: unknown transition(s): unknown")

        selector = on_transition("weird", "unknown", "validate", "weird")

        with self.assertRaises(ValueError) as cm:

            selector(None, self.req, rset=self.rset)

        self.assertEqual(str(cm.exception),

                         "wf_test: unknown transition(s): unknown,weird")

    def test_on_transition_with_no_effect(self):

        """selector will not be triggered with `change_state()`"""

        self.adapter.change_state('validated')

        self._commit()

        self.assertEqual(self.adapter.state, 'validated')

        selector = on_transition("validate")

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = on_transition("validate", "forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

        selector = on_transition("forsake")

        self.assertEqual(selector(None, self.req, rset=self.rset), 0)

class RelationPossibleTC(CubicWebTC):

    def test_rqlst_1(self):

        req = self.request()

        selector = relation_possible('in_group')

        select = self.vreg.parse(req, 'Any X WHERE X is CWUser').children[0]

        score = selector(None, req, rset=1,

                         select=select, filtered_variable=select.defined_vars['X'])

        self.assertEqual(score, 1)

    def test_rqlst_2(self):

        req = self.request()

        selector = relation_possible('in_group')

        select = self.vreg.parse(req, 'Any 1, COUNT(X) WHERE X is CWUser, X creation_date XD, '

                                 'Y creation_date YD, Y is CWGroup '

                                 'HAVING DAY(XD)=DAY(YD)').children[0]

        score = selector(None, req, rset=1,

                         select=select, filtered_variable=select.defined_vars['X'])

        self.assertEqual(score, 1)

class MatchUserGroupsTC(CubicWebTC):

    def test_owners_group(self):

        """tests usage of 'owners' group with match_user_group"""

        class SomeAction(action.Action):

            __regid__ = 'yo'

            category = 'foo'

            __select__ = match_user_groups('owners')

        self.vreg._loadedmods[__name__] = {}

        self.vreg.register(SomeAction)

        SomeAction.__registered__(self.vreg['actions'])

        self.failUnless(SomeAction in self.vreg['actions']['yo'], self.vreg['actions'])

        try:

            # login as a simple user

            req = self.request()

            self.create_user(req, 'john')

            self.login('john')

            # it should not be possible to use SomeAction not owned objects

            req = self.request()

            rset = req.execute('Any G WHERE G is CWGroup, G name "managers"')