# copyright 2003-2015 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 datetime import datetime
from threading import Thread

from six.moves import range

from logilab.common.testlib import SkipTest

import logilab.database as lgdb
from cubicweb import ValidationError
from cubicweb.devtools import PostgresApptestConfiguration, startpgcluster, stoppgcluster
from cubicweb.devtools.testlib import CubicWebTC
from cubicweb.predicates import is_instance
from cubicweb.entities.adapters import IFTIndexableAdapter

from unittest_querier import FixedOffset


def setUpModule():
    startpgcluster(__file__)


def tearDownModule():
    stoppgcluster(__file__)


class PostgresTimeoutConfiguration(PostgresApptestConfiguration):
    def __init__(self, *args, **kwargs):
        self.default_sources = PostgresApptestConfiguration.default_sources.copy()
        self.default_sources['system'] = PostgresApptestConfiguration.default_sources['system'].copy()
        self.default_sources['system']['db-statement-timeout'] = 200
        super(PostgresTimeoutConfiguration, self).__init__(*args, **kwargs)


class PostgresFTITC(CubicWebTC):
    configcls = PostgresApptestConfiguration

    def test_eid_range(self):
        # concurrent allocation of eid ranges
        source = self.session.repo.sources_by_uri['system']
        range1 = []
        range2 = []
        def allocate_eid_ranges(session, target):
            for x in range(1, 10):
                eid = source.create_eid(session, count=x)
                target.extend(range(eid-x, eid))

        t1 = Thread(target=lambda: allocate_eid_ranges(self.session, range1))
        t2 = Thread(target=lambda: allocate_eid_ranges(self.session, range2))
        t1.start()
        t2.start()
        t1.join()
        t2.join()
        self.assertEqual(range1, sorted(range1))
        self.assertEqual(range2, sorted(range2))
        self.assertEqual(set(), set(range1) & set(range2))

    def test_occurence_count(self):
        with self.admin_access.repo_cnx() as cnx:
            c1 = cnx.create_entity('Card', title=u'c1',
                                   content=u'cubicweb cubicweb cubicweb')
            c2 = cnx.create_entity('Card', title=u'c3',
                                   content=u'cubicweb')
            c3 = cnx.create_entity('Card', title=u'c2',
                                   content=u'cubicweb cubicweb')
            cnx.commit()
            self.assertEqual(cnx.execute('Card X ORDERBY FTIRANK(X) DESC '
                                         'WHERE X has_text "cubicweb"').rows,
                             [[c1.eid,], [c3.eid,], [c2.eid,]])


    def test_attr_weight(self):
        class CardIFTIndexableAdapter(IFTIndexableAdapter):
            __select__ = is_instance('Card')
            attr_weight = {'title': 'A'}
        with self.temporary_appobjects(CardIFTIndexableAdapter):
            with self.admin_access.repo_cnx() as cnx:
                c1 = cnx.create_entity('Card', title=u'c1',
                                       content=u'cubicweb cubicweb cubicweb')
                c2 = cnx.create_entity('Card', title=u'c2',
                                       content=u'cubicweb cubicweb')
                c3 = cnx.create_entity('Card', title=u'cubicweb',
                                       content=u'autre chose')
                cnx.commit()
                self.assertEqual(cnx.execute('Card X ORDERBY FTIRANK(X) DESC '
                                             'WHERE X has_text "cubicweb"').rows,
                                 [[c3.eid,], [c1.eid,], [c2.eid,]])

    def test_entity_weight(self):
        class PersonneIFTIndexableAdapter(IFTIndexableAdapter):
            __select__ = is_instance('Personne')
            entity_weight = 2.0
        with self.temporary_appobjects(PersonneIFTIndexableAdapter):
            with self.admin_access.repo_cnx() as cnx:
                c1 = cnx.create_entity('Personne', nom=u'c1', prenom=u'cubicweb')
                c2 = cnx.create_entity('Comment', content=u'cubicweb cubicweb',
                                       comments=c1)
                c3 = cnx.create_entity('Comment', content=u'cubicweb cubicweb cubicweb',
                                       comments=c1)
                cnx.commit()
                self.assertEqual(cnx.execute('Any X ORDERBY FTIRANK(X) DESC '
                                             'WHERE X has_text "cubicweb"').rows,
                                  [[c1.eid,], [c3.eid,], [c2.eid,]])

    def test_tz_datetime(self):
        with self.admin_access.repo_cnx() as cnx:
            bob = cnx.create_entity('Personne', nom=u'bob',
                                   tzdatenaiss=datetime(1977, 6, 7, 2, 0, tzinfo=FixedOffset(1)))
            datenaiss = cnx.execute("Any XD WHERE X nom 'bob', X tzdatenaiss XD")[0][0]
            self.assertIsNotNone(datenaiss.tzinfo)
            self.assertEqual(datenaiss.utctimetuple()[:5], (1977, 6, 7, 1, 0))
            cnx.commit()
            cnx.create_entity('Personne', nom=u'boby',
                              tzdatenaiss=datetime(1977, 6, 7, 2, 0))
            datenaiss = cnx.execute("Any XD WHERE X nom 'boby', X tzdatenaiss XD")[0][0]
            self.assertIsNotNone(datenaiss.tzinfo)
            self.assertEqual(datenaiss.utctimetuple()[:5], (1977, 6, 7, 2, 0))
            rset = cnx.execute("Any X WHERE X tzdatenaiss %(d)s",
                               {'d': datetime(1977, 6, 7, 2, 0, tzinfo=FixedOffset(1))})
            self.assertEqual(rset.rows, [[bob.eid]])

    def test_constraint_validationerror(self):
        with self.admin_access.repo_cnx() as cnx:
            with cnx.allow_all_hooks_but('integrity'):
                with self.assertRaises(ValidationError) as cm:
                    cnx.execute("INSERT Note N: N type 'nogood'")
                self.assertEqual(cm.exception.errors,
                        {'type-subject': u'invalid value %(KEY-value)s, it must be one of %(KEY-choices)s'})
                self.assertEqual(cm.exception.msgargs,
                        {'type-subject-value': u'"nogood"',
                         'type-subject-choices': u'"todo", "a", "b", "T", "lalala"'})


class PostgresStatementTimeoutTC(CubicWebTC):
    configcls = PostgresTimeoutConfiguration

    @classmethod
    def setUpClass(cls):
        super(PostgresStatementTimeoutTC, cls).setUpClass()
        cls.orig_connect_hooks = lgdb.SQL_CONNECT_HOOKS['postgres'][:]

    @classmethod
    def tearDownClass(cls):
        lgdb.SQL_CONNECT_HOOKS['postgres'] = cls.orig_connect_hooks

    def test_statement_timeout(self):
        with self.admin_access.repo_cnx() as cnx:
            cnx.system_sql('select pg_sleep(0.1)')
            with self.assertRaises(Exception) as cm:
                cnx.system_sql('select pg_sleep(0.3)')
        self.assertIn('statement timeout', str(cm.exception))


class PostgresLimitSizeTC(CubicWebTC):
    configcls = PostgresApptestConfiguration

    def test(self):
        with self.admin_access.repo_cnx() as cnx:
            def sql(string):
                return cnx.system_sql(string).fetchone()[0]
            for html, size, expected in [
                ('<p>hello</p>', 20, '<p>hello</p>'),
                ('<p>hello</p>', 2, 'he...'),
                ('<br/>hello', 2, 'he...'),
                ('<span class=\"1\">he</span>llo', 2, 'he...'),
                ('<span>a>b</span>', 2, 'a>...'),
            ]:
                with self.subTest(html=html, size=size):
                    actual = sql("SELECT limit_size('%s', 'text/html', %d)" % (html, size))
                    self.assertEqual(actual, expected)


if __name__ == '__main__':
    import unittest
    unittest.main()