# copyright 2003-2010 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 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,

from cubicweb.interfaces import IDownloadable

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)

    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 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

            self.create_user('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"')

            self.failIf('yo' in dict(self.pactions(req, rset)))

            # insert a new card, and check that we can use SomeAction on our object

            self.execute('INSERT Card C: C title "zoubidou"')

            self.commit()

            req = self.request()

            rset = req.execute('Card C WHERE C title "zoubidou"')

            self.failUnless('yo' in dict(self.pactions(req, rset)), self.pactions(req, rset))

            # make sure even managers can't use the action

            self.restore_connection()

            req = self.request()

            rset = req.execute('Card C WHERE C title "zoubidou"')

            self.failIf('yo' in dict(self.pactions(req, rset)))

        finally:

            del self.vreg[SomeAction.__registry__][SomeAction.__regid__]

class MultiLinesRsetSelectorTC(CubicWebTC):

    def setUp(self):

        super(MultiLinesRsetSelectorTC, self).setUp()

        self.req = self.request()

        self.req.execute('INSERT CWGroup G: G name "group1"')

        self.req.execute('INSERT CWGroup G: G name "group2"')

        self.commit()

        self.rset = self.req.execute('Any G WHERE G is CWGroup')

    def test_default_op_in_selector(self):

        expected = len(self.rset)

        selector = multi_lines_rset(expected)

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

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

        selector = multi_lines_rset(expected + 1)

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

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

        selector = multi_lines_rset(expected - 1)

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

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

    def test_without_rset(self):

        expected = len(self.rset)

        selector = multi_lines_rset(expected)

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

        selector = multi_lines_rset(expected + 1)

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

        selector = multi_lines_rset(expected - 1)

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

    def test_with_operators(self):

        expected = len(self.rset)

        # Format     'expected', 'operator', 'assert'

        testdata = (( expected,         eq,        1),

                    ( expected+1,       eq,        0),

                    ( expected-1,       eq,        0),

                    ( expected,         le,        1),

                    ( expected+1,       le,        1),

                    ( expected-1,       le,        0),

                    ( expected-1,       gt,        1),

                    ( expected,         gt,        0),

                    ( expected+1,       gt,        0),

                    ( expected+1,       lt,        1),

                    ( expected,         lt,        0),

                    ( expected-1,       lt,        0))

        for (expected, operator, assertion) in testdata:

            selector = multi_lines_rset(expected, operator)

            yield self.assertEqual, selector(None, self.req, self.rset), assertion

class ScoreEntitySelectorTC(CubicWebTC):

    def test_intscore_entity_selector(self):

        req = self.request()

        rset = req.execute('Any E WHERE E eid 1')

        selector = score_entity(lambda x: None)

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

        selector = score_entity(lambda x: "something")

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

        selector = score_entity(lambda x: object)

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

        rset = req.execute('Any G LIMIT 2 WHERE G is CWGroup')

        selector = score_entity(lambda x: 10)

        self.assertEqual(selector(None, req, rset), 20)

        selector = score_entity(lambda x: 10, once_is_enough=True)

        self.assertEqual(selector(None, req, rset), 10)

if __name__ == '__main__':

    unittest_main()