# 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 module cubicweb.server.migractions"""

import os

import os.path as osp

import sys

from datetime import date

from contextlib import contextmanager

import tempfile

from logilab.common.testlib import unittest_main, Tags, tag

from logilab.common import tempattr

from yams.constraints import UniqueConstraint

from cubicweb import (ConfigurationError, ValidationError,

                      ExecutionError, Binary)

from cubicweb.devtools import startpgcluster, stoppgcluster

from cubicweb.devtools.testlib import CubicWebTC, TemporaryDirectory

from cubicweb.server.sqlutils import SQL_PREFIX

from cubicweb.server.migractions import ServerMigrationHelper

from cubicweb.server.sources import storages

from cubicweb.server.schema2sql import build_index_name

import cubicweb.devtools

HERE = osp.dirname(osp.abspath(__file__))

migrschema = None

def setUpModule():

    startpgcluster(__file__)

def tearDownModule(*args):

    global migrschema

    del migrschema

    if hasattr(MigrationCommandsTC, 'origschema'):

        del MigrationCommandsTC.origschema

    if hasattr(MigrationCommandsComputedTC, 'origschema'):

        del MigrationCommandsComputedTC.origschema

    stoppgcluster(__file__)

class MigrationConfig(cubicweb.devtools.TestServerConfiguration):

    default_sources = cubicweb.devtools.DEFAULT_PSQL_SOURCES

    CUBES_PATH = cubicweb.devtools.TestServerConfiguration.CUBES_PATH + [

        osp.join(HERE, 'data-migractions', 'cubes')]

class MigrationTC(CubicWebTC):

    appid = 'data-migractions'

    configcls = MigrationConfig

    tags = CubicWebTC.tags | Tags(('server', 'migration', 'migractions'))

    def _init_repo(self):

        super(MigrationTC, self)._init_repo()

        # we have to read schema from the database to get eid for schema entities

        self.repo.set_schema(self.repo.deserialize_schema(), resetvreg=False)

        # hack to read the schema from data/migrschema

        @contextmanager

        def temp_app(config, appid, apphome):

            old = config.apphome, config.appid

            sys.path.remove(old[0])

            sys.path.insert(0, apphome)

            config._apphome, config.appid = apphome, appid

            try:

                yield config

            finally:

                sys.path.remove(apphome)

                sys.path.insert(0, old[0])

                config._apphome, config.appid = old

        appid = osp.join(self.appid, 'migratedapp')

        apphome = osp.join(HERE, appid)

        with temp_app(self.config, appid, apphome) as config:

            global migrschema

            migrschema = config.load_schema()

    def setUp(self):

        self.configcls.cls_adjust_sys_path()

        super(MigrationTC, self).setUp()

    def tearDown(self):

        super(MigrationTC, self).tearDown()

        self.repo.vreg['etypes'].clear_caches()

    @contextmanager

    def mh(self):

        with self.admin_access.repo_cnx() as cnx:

            yield cnx, ServerMigrationHelper(self.repo.config, migrschema,

                                             repo=self.repo, cnx=cnx,

                                             interactive=False)

    def table_sql(self, mh, tablename):

        result = mh.sqlexec("SELECT table_name FROM information_schema.tables WHERE LOWER(table_name)=%(table)s",

                            {'table': tablename.lower()})

        if result:

            return result[0][0]

        return None # no such table

    def table_schema(self, mh, tablename):

        result = mh.sqlexec("SELECT column_name, data_type, character_maximum_length FROM information_schema.columns "

                            "WHERE LOWER(table_name) = %(table)s", {'table': tablename.lower()})

        assert result, 'no table %s' % tablename

        return dict((x[0], (x[1], x[2])) for x in result)

    def table_constraints(self, mh, tablename):

        result = mh.sqlexec(

            "SELECT DISTINCT constraint_name FROM information_schema.constraint_column_usage "

            "WHERE LOWER(table_name) = '%(table)s' AND constraint_name LIKE 'cstr%%'"

            % {'table': tablename.lower()})

        assert result, 'no table %s' % tablename

        return set(x[0] for x in result)

class MigrationCommandsTC(MigrationTC):

    def _init_repo(self):

        super(MigrationCommandsTC, self)._init_repo()

        assert 'Folder' in migrschema

    def test_add_attribute_bool(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('yesno', self.schema)

            cnx.create_entity('Note')

            cnx.commit()

            mh.cmd_add_attribute('Note', 'yesno')

            self.assertIn('yesno', self.schema)

            self.assertEqual(self.schema['yesno'].subjects(), ('Note',))

            self.assertEqual(self.schema['yesno'].objects(), ('Boolean',))

            self.assertEqual(self.schema['Note'].default('yesno'), False)

            # test default value set on existing entities

            note = cnx.execute('Note X').get_entity(0, 0)

            self.assertEqual(note.yesno, False)

            # test default value set for next entities

            self.assertEqual(cnx.create_entity('Note').yesno, False)

    def test_add_attribute_int(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('whatever', self.schema)

            cnx.create_entity('Note')

            cnx.commit()

            orderdict = dict(mh.rqlexec('Any RTN, O WHERE X name "Note", RDEF from_entity X, '

                                        'RDEF relation_type RT, RDEF ordernum O, RT name RTN'))

            mh.cmd_add_attribute('Note', 'whatever')

            self.assertIn('whatever', self.schema)

            self.assertEqual(self.schema['whatever'].subjects(), ('Note',))

            self.assertEqual(self.schema['whatever'].objects(), ('Int',))

            self.assertEqual(self.schema['Note'].default('whatever'), 0)

            # test default value set on existing entities

            note = cnx.execute('Note X').get_entity(0, 0)

            self.assertIsInstance(note.whatever, int)

            self.assertEqual(note.whatever, 0)

            # test default value set for next entities

            self.assertEqual(cnx.create_entity('Note').whatever, 0)

            # test attribute order

            orderdict2 = dict(mh.rqlexec('Any RTN, O WHERE X name "Note", RDEF from_entity X, '

                                         'RDEF relation_type RT, RDEF ordernum O, RT name RTN'))

            whateverorder = migrschema['whatever'].rdef('Note', 'Int').order

            for k, v in orderdict.items():

                if v >= whateverorder:

                    orderdict[k] = v+1

            orderdict['whatever'] = whateverorder

            self.assertDictEqual(orderdict, orderdict2)

            #self.assertEqual([r.type for r in self.schema['Note'].ordered_relations()],

            #                  ['modification_date', 'creation_date', 'owned_by',

            #                   'eid', 'ecrit_par', 'inline1', 'date', 'type',

            #                   'whatever', 'date', 'in_basket'])

            # NB: commit instead of rollback make following test fail with py2.5

            #     this sounds like a pysqlite/2.5 bug (the same eid is affected to

            #     two different entities)

    def test_add_attribute_varchar(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('whatever', self.schema)

            cnx.create_entity('Note')

            cnx.commit()

            self.assertNotIn('shortpara', self.schema)

            mh.cmd_add_attribute('Note', 'shortpara')

            self.assertIn('shortpara', self.schema)

            self.assertEqual(self.schema['shortpara'].subjects(), ('Note', ))

            self.assertEqual(self.schema['shortpara'].objects(), ('String', ))

            # test created column is actually a varchar(64)

            fields = self.table_schema(mh, '%sNote' % SQL_PREFIX)

            self.assertEqual(fields['%sshortpara' % SQL_PREFIX], ('character varying', 11))

            # test default value set on existing entities

            self.assertEqual(cnx.execute('Note X').get_entity(0, 0).shortpara, 'hop')

            # test default value set for next entities

            self.assertEqual(cnx.create_entity('Note', shortpara=u'hop hop').shortpara, u'hop hop')

            # serialized constraint added

            constraints = self.table_constraints(mh, 'cw_Personne')

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

    def test_add_attribute_unique(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('unique_id', self.schema)

            mh.cmd_add_attribute('Note', 'unique_id')

            # test unique index creation

            dbh = self.repo.system_source.dbhelper

            self.assertTrue(dbh.index_exists(cnx.cnxset.cu, 'cw_Note', 'cw_unique_id', unique=True))

    def test_add_datetime_with_default_value_attribute(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('mydate', self.schema)

            self.assertNotIn('oldstyledefaultdate', self.schema)

            self.assertNotIn('newstyledefaultdate', self.schema)

            mh.cmd_add_attribute('Note', 'mydate')

            mh.cmd_add_attribute('Note', 'oldstyledefaultdate')

            mh.cmd_add_attribute('Note', 'newstyledefaultdate')

            self.assertIn('mydate', self.schema)

            self.assertIn('oldstyledefaultdate', self.schema)

            self.assertIn('newstyledefaultdate', self.schema)

            self.assertEqual(self.schema['mydate'].subjects(), ('Note', ))

            self.assertEqual(self.schema['mydate'].objects(), ('Date', ))

            testdate = date(2005, 12, 13)

            eid1 = mh.rqlexec('INSERT Note N')[0][0]

            eid2 = mh.rqlexec('INSERT Note N: N mydate %(mydate)s', {'mydate' : testdate})[0][0]

            d1 = mh.rqlexec('Any D WHERE X eid %(x)s, X mydate D', {'x': eid1})[0][0]

            d2 = mh.rqlexec('Any D WHERE X eid %(x)s, X mydate D', {'x': eid2})[0][0]

            d3 = mh.rqlexec('Any D WHERE X eid %(x)s, X oldstyledefaultdate D', {'x': eid1})[0][0]

            d4 = mh.rqlexec('Any D WHERE X eid %(x)s, X newstyledefaultdate D', {'x': eid1})[0][0]

            self.assertEqual(d1, date.today())

            self.assertEqual(d2, testdate)

            myfavoritedate = date(2013, 1, 1)

            self.assertEqual(d3, myfavoritedate)

            self.assertEqual(d4, myfavoritedate)

    def test_drop_chosen_constraints_ctxmanager(self):

        with self.mh() as (cnx, mh):

            with mh.cmd_dropped_constraints('Note', 'unique_id', UniqueConstraint):

                mh.cmd_add_attribute('Note', 'unique_id')

                # make sure the maxsize constraint is not dropped

                self.assertRaises(ValidationError,

                                  mh.rqlexec,

                                  'INSERT Note N: N unique_id "xyz"')

                mh.rollback()

                # make sure the unique constraint is dropped

                mh.rqlexec('INSERT Note N: N unique_id "x"')

                mh.rqlexec('INSERT Note N: N unique_id "x"')

                mh.rqlexec('DELETE Note N')

    def test_drop_required_ctxmanager(self):

        with self.mh() as (cnx, mh):

            with mh.cmd_dropped_constraints('Note', 'unique_id', cstrtype=None,

                                            droprequired=True):

                mh.cmd_add_attribute('Note', 'unique_id')

                mh.rqlexec('INSERT Note N')

                mh.rqlexec('SET N unique_id "x"')

            # make sure the required=True was restored

            self.assertRaises(ValidationError, mh.rqlexec, 'INSERT Note N')

            mh.rollback()

    def test_rename_attribute(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('civility', self.schema)

            eid1 = mh.rqlexec('INSERT Personne X: X nom "lui", X sexe "M"')[0][0]

            eid2 = mh.rqlexec('INSERT Personne X: X nom "l\'autre", X sexe NULL')[0][0]

            mh.cmd_rename_attribute('Personne', 'sexe', 'civility')

            self.assertNotIn('sexe', self.schema)

            self.assertIn('civility', self.schema)

            # test data has been backported

            c1 = mh.rqlexec('Any C WHERE X eid %s, X civility C' % eid1)[0][0]

            self.assertEqual(c1, 'M')

            c2 = mh.rqlexec('Any C WHERE X eid %s, X civility C' % eid2)[0][0]

            self.assertEqual(c2, None)

    def test_workflow_actions(self):

        with self.mh() as (cnx, mh):

            wf = mh.cmd_add_workflow(u'foo', ('Personne', 'Email'),

                                     ensure_workflowable=False)

            for etype in ('Personne', 'Email'):

                s1 = mh.rqlexec('Any N WHERE WF workflow_of ET, ET name "%s", WF name N' %

                                etype)[0][0]

                self.assertEqual(s1, "foo")

                s1 = mh.rqlexec('Any N WHERE ET default_workflow WF, ET name "%s", WF name N' %

                                etype)[0][0]

                self.assertEqual(s1, "foo")

    def test_add_entity_type(self):

        with self.mh() as (cnx, mh):

            self.assertNotIn('Folder2', self.schema)

            self.assertNotIn('filed_under2', self.schema)

            mh.cmd_add_entity_type('Folder2')

            self.assertIn('Folder2', self.schema)

            self.assertIn('Old', self.schema)

            self.assertTrue(cnx.execute('CWEType X WHERE X name "Folder2"'))

            self.assertIn('filed_under2', self.schema)

            self.assertTrue(cnx.execute('CWRType X WHERE X name "filed_under2"'))

            self.assertEqual(sorted(str(rs) for rs in self.schema['Folder2'].subject_relations()),

                              ['created_by', 'creation_date', 'cw_source', 'cwuri',

                               'description', 'description_format',

                               'eid',

                               'filed_under2', 'has_text',

                               'identity', 'in_basket', 'inlined_rel', 'is', 'is_instance_of',

                               'modification_date', 'name', 'owned_by'])

            self.assertCountEqual([str(rs) for rs in self.schema['Folder2'].object_relations()],

                                  ['filed_under2', 'identity', 'inlined_rel'])

            # Old will be missing as it has been renamed into 'New' in the migrated

            # schema while New hasn't been added here.

            self.assertEqual(sorted(str(e) for e in self.schema['filed_under2'].subjects()),

                             sorted(str(e) for e in self.schema.entities() if not e.final and e != 'Old'))

            self.assertEqual(self.schema['filed_under2'].objects(), ('Folder2',))

            eschema = self.schema.eschema('Folder2')

            for cstr in eschema.rdef('name').constraints:

                self.assertTrue(hasattr(cstr, 'eid'))

    def test_add_entity_type_with_constraint(self):

        with self.mh() as (cnx, mh):

            mh.cmd_add_entity_type('Activity')

            constraints = self.table_constraints(mh, 'cw_Activity')

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

    def test_add_cube_with_custom_final_type(self):

        with self.mh() as (cnx, mh):

            try:

                mh.cmd_add_cube('fakecustomtype')

                self.assertIn('Numeric', self.schema)

                self.assertTrue(self.schema['Numeric'].final)

                rdef = self.schema['num'].rdefs[('Location', 'Numeric')]

                self.assertEqual(rdef.scale, 10)

                self.assertEqual(rdef.precision, 18)

                fields = self.table_schema(mh, '%sLocation' % SQL_PREFIX)