# copyright 2003-2014 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 module cubicweb.server.sources.storages"""

from six import PY2

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

from cubicweb.devtools.testlib import CubicWebTC

from glob import glob

import os

import os.path as osp

import sys

import shutil

import tempfile

from cubicweb import Binary, QueryError

from cubicweb.predicates import is_instance

from cubicweb.server.sources import storages

from cubicweb.server.hook import Hook

class DummyBeforeHook(Hook):

    __regid__ = 'dummy-before-hook'

    __select__ = Hook.__select__ & is_instance('File')

    events = ('before_add_entity',)

    def __call__(self):

        self._cw.transaction_data['orig_file_value'] = self.entity.data.getvalue()

class DummyAfterHook(Hook):

    __regid__ = 'dummy-after-hook'

    __select__ = Hook.__select__ & is_instance('File')

    events = ('after_add_entity',)

    def __call__(self):

        # new value of entity.data should be the same as before

        oldvalue = self._cw.transaction_data['orig_file_value']

        assert oldvalue == self.entity.data.getvalue()

class StorageTC(CubicWebTC):

    tempdir = None

    tags = CubicWebTC.tags | Tags('Storage', 'BFSS')

    def setup_database(self):

        self.tempdir = tempfile.mkdtemp()

        bfs_storage = storages.BytesFileSystemStorage(self.tempdir)

        self.bfs_storage = bfs_storage

        storages.set_attribute_storage(self.repo, 'File', 'data', bfs_storage)

        storages.set_attribute_storage(self.repo, 'BFSSTestable', 'opt_attr', bfs_storage)

    def tearDown(self):

        super(StorageTC, self).tearDown()

        storages.unset_attribute_storage(self.repo, 'File', 'data')

        del self.bfs_storage

        shutil.rmtree(self.tempdir)

    def create_file(self, cnx, content=b'the-data'):

        return cnx.create_entity('File', data=Binary(content),

                                 data_format=u'text/plain',

                                 data_name=u'foo.pdf')

    def fspath(self, cnx, entity):

        fspath = cnx.execute('Any fspath(D) WHERE F eid %(f)s, F data D',

                             {'f': entity.eid})[0][0].getvalue()

        return fspath if PY2 else fspath.decode('utf-8')

    def test_bfss_wrong_fspath_usage(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = self.create_file(cnx)

            cnx.execute('Any fspath(D) WHERE F eid %(f)s, F data D', {'f': f1.eid})

            with self.assertRaises(NotImplementedError) as cm:

                cnx.execute('Any fspath(F) WHERE F eid %(f)s', {'f': f1.eid})

            self.assertEqual(str(cm.exception),

                             'This callback is only available for BytesFileSystemStorage '

                             'managed attribute. Is FSPATH() argument BFSS managed?')

    def test_bfss_storage(self):

        with self.admin_access.web_request() as req:

            cnx = req.cnx

            f1 = self.create_file(req)

            filepaths = glob(osp.join(self.tempdir, '%s_data_*' % f1.eid))

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

            expected_filepath = filepaths[0]

            # file should be read only

            self.assertFalse(os.access(expected_filepath, os.W_OK))

            self.assertEqual(open(expected_filepath).read(), 'the-data')

            cnx.rollback()

            self.assertFalse(osp.isfile(expected_filepath))

            filepaths = glob(osp.join(self.tempdir, '%s_data_*' % f1.eid))

            self.assertEqual(len(filepaths), 0, filepaths)

            f1 = self.create_file(req)

            cnx.commit()

            filepaths = glob(osp.join(self.tempdir, '%s_data_*' % f1.eid))

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

            expected_filepath = filepaths[0]

            self.assertEqual(open(expected_filepath).read(), 'the-data')

            # add f1 back to the entity cache with req as _cw

            f1 = req.entity_from_eid(f1.eid)

            f1.cw_set(data=Binary(b'the new data'))

            cnx.rollback()

            self.assertEqual(open(expected_filepath).read(), 'the-data')

            f1.cw_delete()

            self.assertTrue(osp.isfile(expected_filepath))

            cnx.rollback()

            self.assertTrue(osp.isfile(expected_filepath))

            f1.cw_delete()

            cnx.commit()

            self.assertFalse(osp.isfile(expected_filepath))

    def test_bfss_sqlite_fspath(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = self.create_file(cnx)

            expected_filepath = osp.join(self.tempdir, '%s_data_%s' % (f1.eid, f1.data_name))

            base, ext = osp.splitext(expected_filepath)

            self.assertTrue(self.fspath(cnx, f1).startswith(base))

            self.assertTrue(self.fspath(cnx, f1).endswith(ext))

    def test_bfss_fs_importing_doesnt_touch_path(self):

        with self.admin_access.repo_cnx() as cnx:

            cnx.transaction_data['fs_importing'] = True

            filepath = osp.abspath(__file__)

            f1 = cnx.create_entity('File', data=Binary(filepath.encode(sys.getfilesystemencoding())),

                                   data_format=u'text/plain', data_name=u'foo')

            self.assertEqual(self.fspath(cnx, f1), filepath)

    def test_source_storage_transparency(self):

        with self.admin_access.repo_cnx() as cnx:

            with self.temporary_appobjects(DummyBeforeHook, DummyAfterHook):

                self.create_file(cnx)

    def test_source_mapped_attribute_error_cases(self):

        with self.admin_access.repo_cnx() as cnx:

            with self.assertRaises(QueryError) as cm:

                cnx.execute('Any X WHERE X data ~= "hop", X is File')

            self.assertEqual(str(cm.exception), 'can\'t use File.data (X data ILIKE "hop") in restriction')

            with self.assertRaises(QueryError) as cm:

                cnx.execute('Any X, Y WHERE X data D, Y data D, '

                             'NOT X identity Y, X is File, Y is File')

            self.assertEqual(str(cm.exception), "can't use D as a restriction variable")

            # query returning mix of mapped / regular attributes (only file.data

            # mapped, not image.data for instance)

            with self.assertRaises(QueryError) as cm:

                cnx.execute('Any X WITH X BEING ('

                             ' (Any NULL)'

                             '  UNION '

                             ' (Any D WHERE X data D, X is File)'

                             ')')

            self.assertEqual(str(cm.exception), 'query fetch some source mapped attribute, some not')

            with self.assertRaises(QueryError) as cm:

                cnx.execute('(Any D WHERE X data D, X is File)'

                             ' UNION '

                             '(Any D WHERE X title D, X is Bookmark)')

            self.assertEqual(str(cm.exception), 'query fetch some source mapped attribute, some not')

            storages.set_attribute_storage(self.repo, 'State', 'name',

                                           storages.BytesFileSystemStorage(self.tempdir))

            try:

                with self.assertRaises(QueryError) as cm:

                    cnx.execute('Any D WHERE X name D, X is IN (State, Transition)')

                self.assertEqual(str(cm.exception), 'query fetch some source mapped attribute, some not')

            finally:

                storages.unset_attribute_storage(self.repo, 'State', 'name')

    def test_source_mapped_attribute_advanced(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = self.create_file(cnx)

            rset = cnx.execute('Any X,D WITH D,X BEING ('

                                ' (Any D, X WHERE X eid %(x)s, X data D)'

                                '  UNION '

                                ' (Any D, X WHERE X eid %(x)s, X data D)'

                                ')', {'x': f1.eid})

            self.assertEqual(len(rset), 2)

            self.assertEqual(rset[0][0], f1.eid)

            self.assertEqual(rset[1][0], f1.eid)

            self.assertEqual(rset[0][1].getvalue(), b'the-data')

            self.assertEqual(rset[1][1].getvalue(), b'the-data')

            rset = cnx.execute('Any X,LENGTH(D) WHERE X eid %(x)s, X data D',

                                {'x': f1.eid})

            self.assertEqual(len(rset), 1)

            self.assertEqual(rset[0][0], f1.eid)

            self.assertEqual(rset[0][1], len('the-data'))

            rset = cnx.execute('Any X,LENGTH(D) WITH D,X BEING ('

                                ' (Any D, X WHERE X eid %(x)s, X data D)'

                                '  UNION '

                                ' (Any D, X WHERE X eid %(x)s, X data D)'

                                ')', {'x': f1.eid})

            self.assertEqual(len(rset), 2)

            self.assertEqual(rset[0][0], f1.eid)

            self.assertEqual(rset[1][0], f1.eid)

            self.assertEqual(rset[0][1], len('the-data'))

            self.assertEqual(rset[1][1], len('the-data'))

            with self.assertRaises(QueryError) as cm:

                cnx.execute('Any X,UPPER(D) WHERE X eid %(x)s, X data D',

                             {'x': f1.eid})

            self.assertEqual(str(cm.exception), 'UPPER can not be called on mapped attribute')

    def test_bfss_fs_importing_transparency(self):

        with self.admin_access.repo_cnx() as cnx:

            cnx.transaction_data['fs_importing'] = True

            filepath = osp.abspath(__file__)

            f1 = cnx.create_entity('File', data=Binary(filepath.encode(sys.getfilesystemencoding())),

                                   data_format=u'text/plain', data_name=u'foo')

            cw_value = f1.data.getvalue()

            fs_value = open(filepath, 'rb').read()

            if cw_value != fs_value:

                self.fail('cw value %r is different from file content' % cw_value)

    @tag('update')

    def test_bfss_update_with_existing_data(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = cnx.create_entity('File', data=Binary(b'some data'),

                                   data_format=u'text/plain', data_name=u'foo')

            # NOTE: do not use cw_set() which would automatically

            #       update f1's local dict. We want the pure rql version to work

            cnx.execute('SET F data %(d)s WHERE F eid %(f)s',

                         {'d': Binary(b'some other data'), 'f': f1.eid})

            self.assertEqual(f1.data.getvalue(), b'some other data')

            cnx.commit()

            f2 = cnx.execute('Any F WHERE F eid %(f)s, F is File', {'f': f1.eid}).get_entity(0, 0)

            self.assertEqual(f2.data.getvalue(), b'some other data')

    @tag('update', 'extension', 'commit')

    def test_bfss_update_with_different_extension_commited(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = cnx.create_entity('File', data=Binary(b'some data'),

                                   data_format=u'text/plain', data_name=u'foo.txt')

            # NOTE: do not use cw_set() which would automatically

            #       update f1's local dict. We want the pure rql version to work

            cnx.commit()

            old_path = self.fspath(cnx, f1)

            self.assertTrue(osp.isfile(old_path))

            self.assertEqual(osp.splitext(old_path)[1], '.txt')

            cnx.execute('SET F data %(d)s, F data_name %(dn)s, '

                         'F data_format %(df)s WHERE F eid %(f)s',

                         {'d': Binary(b'some other data'), 'f': f1.eid,

                          'dn': u'bar.jpg', 'df': u'image/jpeg'})

            cnx.commit()

            # the new file exists with correct extension

            # the old file is dead

            f2 = cnx.execute('Any F WHERE F eid %(f)s, F is File', {'f': f1.eid}).get_entity(0, 0)

            new_path = self.fspath(cnx, f2)

            self.assertFalse(osp.isfile(old_path))

            self.assertTrue(osp.isfile(new_path))

            self.assertEqual(osp.splitext(new_path)[1], '.jpg')

    @tag('update', 'extension', 'rollback')

    def test_bfss_update_with_different_extension_rolled_back(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = cnx.create_entity('File', data=Binary(b'some data'),

                                   data_format=u'text/plain', data_name=u'foo.txt')

            # NOTE: do not use cw_set() which would automatically

            #       update f1's local dict. We want the pure rql version to work

            cnx.commit()

            old_path = self.fspath(cnx, f1)

            old_data = f1.data.getvalue()

            self.assertTrue(osp.isfile(old_path))

            self.assertEqual(osp.splitext(old_path)[1], '.txt')

            cnx.execute('SET F data %(d)s, F data_name %(dn)s, '

                         'F data_format %(df)s WHERE F eid %(f)s',

                         {'d': Binary(b'some other data'),

                          'f': f1.eid,

                          'dn': u'bar.jpg',

                          'df': u'image/jpeg'})

            cnx.rollback()

            # the new file exists with correct extension

            # the old file is dead

            f2 = cnx.execute('Any F WHERE F eid %(f)s, F is File',

                              {'f': f1.eid}).get_entity(0, 0)

            new_path = self.fspath(cnx, f2)

            new_data = f2.data.getvalue()

            self.assertTrue(osp.isfile(new_path))

            self.assertEqual(osp.splitext(new_path)[1], '.txt')

            self.assertEqual(old_path, new_path)

            self.assertEqual(old_data, new_data)

    @tag('update', 'NULL')

    def test_bfss_update_to_None(self):

        with self.admin_access.repo_cnx() as cnx:

            f = cnx.create_entity('Affaire', opt_attr=Binary(b'toto'))

            cnx.commit()

            f.cw_set(opt_attr=None)

            cnx.commit()

    @tag('fs_importing', 'update')

    def test_bfss_update_with_fs_importing(self):

        with self.admin_access.repo_cnx() as cnx:

            f1 = cnx.create_entity('File', data=Binary(b'some data'),

                                   data_format=u'text/plain',

                                   data_name=u'foo')

            old_fspath = self.fspath(cnx, f1)

            cnx.transaction_data['fs_importing'] = True

            new_fspath = osp.join(self.tempdir, 'newfile.txt')

            open(new_fspath, 'w').write('the new data')

            cnx.execute('SET F data %(d)s WHERE F eid %(f)s',

                         {'d': Binary(new_fspath.encode(sys.getfilesystemencoding())), 'f': f1.eid})

            cnx.commit()

            self.assertEqual(f1.data.getvalue(), b'the new data')

            self.assertEqual(self.fspath(cnx, f1), new_fspath)

            self.assertFalse(osp.isfile(old_fspath))

    @tag('fsimport')

    def test_clean(self):

        with self.admin_access.repo_cnx() as cnx:

            fsimport = storages.fsimport

            td = cnx.transaction_data

            self.assertNotIn('fs_importing', td)

            with fsimport(cnx):

                self.assertIn('fs_importing', td)

                self.assertTrue(td['fs_importing'])

            self.assertNotIn('fs_importing', td)

    @tag('fsimport')

    def test_true(self):

        with self.admin_access.repo_cnx() as cnx:

            fsimport = storages.fsimport

            td = cnx.transaction_data

            td['fs_importing'] = True

            with fsimport(cnx):

                self.assertIn('fs_importing', td)

                self.assertTrue(td['fs_importing'])

            self.assertTrue(td['fs_importing'])