# copyright 2003-2012 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/>.

"""cubicweb.cwconfig unit tests"""

import contextlib

import compileall

import functools

import sys

import os

import pkgutil

from os.path import dirname, join, abspath

from pkg_resources import EntryPoint, Distribution

import unittest

from mock import patch

from six import PY3

from logilab.common.modutils import cleanup_sys_modules

from logilab.common.changelog import Version

from cubicweb.devtools import ApptestConfiguration

from cubicweb.devtools.testlib import BaseTestCase, TemporaryDirectory

from cubicweb.cwconfig import (

    CubicWebConfiguration, _find_prefix, _expand_modname)

def unabsolutize(path):

    parts = path.split(os.sep)

    for i, part in reversed(tuple(enumerate(parts))):

        if part.startswith('cubicweb_'):

            return os.sep.join([part[len('cubicweb_'):]] + parts[i+1:])

        if part.startswith('cubicweb') or part == 'legacy_cubes':

            return os.sep.join(parts[i+1:])

    raise Exception('duh? %s' % path)

def templibdir(func):

    """create a temporary directory and insert it in sys.path"""

    @functools.wraps(func)

    def wrapper(*args, **kwargs):

        with TemporaryDirectory() as libdir:

            sys.path.insert(0, libdir)

            try:

                args = args + (libdir,)

                return func(*args, **kwargs)

            finally:

                sys.path.remove(libdir)

    return wrapper

def create_filepath(filepath):

    filedir = dirname(filepath)

    if not os.path.exists(filedir):

        os.makedirs(filedir)

    with open(filepath, 'a'):

        pass

@contextlib.contextmanager

def temp_config(appid, instance_dir, cubes_dir, cubes):

    """context manager that create a config object with specified appid,

    instance_dir, cubes_dir and cubes"""

    cls = CubicWebConfiguration

    old = (cls._INSTANCES_DIR, cls.CUBES_DIR, cls.CUBES_PATH,

           sys.path[:], sys.meta_path[:])

    old_modules = set(sys.modules)

    try:

        cls._INSTANCES_DIR, cls.CUBES_DIR, cls.CUBES_PATH = (

            instance_dir, cubes_dir, [])

        config = cls(appid)

        config._cubes = cubes

        config.adjust_sys_path()

        yield config

    finally:

        (cls._INSTANCES_DIR, cls.CUBES_DIR, cls.CUBES_PATH,

         sys.path[:], sys.meta_path[:]) = old

        for module in set(sys.modules) - old_modules:

            del sys.modules[module]

class CubicWebConfigurationTC(BaseTestCase):

    @classmethod

    def setUpClass(cls):

        sys.path.append(cls.datapath('libpython'))

    @classmethod

    def tearDownClass(cls):

        sys.path.remove(cls.datapath('libpython'))

    def setUp(self):

        self.config = ApptestConfiguration('data', __file__)

        self.config._cubes = ('email', 'file')

    def tearDown(self):

        ApptestConfiguration.CUBES_PATH = []

    def iter_entry_points(group, name):

        """Mock pkg_resources.iter_entry_points to yield EntryPoint from

        packages found in test/data/libpython even though these are not

        installed.

        """

        libpython = CubicWebConfigurationTC.datapath('libpython')

        prefix = 'cubicweb_'

        for pkgname in os.listdir(libpython):

            if not pkgname.startswith(prefix):

                continue

            location = join(libpython, pkgname)

            yield EntryPoint(pkgname[len(prefix):], pkgname,

                             dist=Distribution(location))

    @patch('pkg_resources.iter_entry_points', side_effect=iter_entry_points)

    def test_available_cubes(self, mock_iter_entry_points):

        expected_cubes = [

            'card', 'comment', 'cubicweb_comment', 'cubicweb_email', 'file',

            'cubicweb_file', 'cubicweb_forge', 'localperms',

            'cubicweb_mycube', 'tag',

        ]

        self._test_available_cubes(expected_cubes)

        mock_iter_entry_points.assert_called_once_with(

            group='cubicweb.cubes', name=None)

    def _test_available_cubes(self, expected_cubes):

        self.assertEqual(self.config.available_cubes(), expected_cubes)

    def test_reorder_cubes(self):

        # forge depends on email and file and comment

        # email depends on file

        self.assertEqual(self.config.reorder_cubes(['file', 'email', 'forge']),

                          ('forge', 'email', 'file'))

        self.assertEqual(self.config.reorder_cubes(['email', 'file', 'forge']),

                          ('forge', 'email', 'file'))

        self.assertEqual(self.config.reorder_cubes(['email', 'forge', 'file']),

                          ('forge', 'email', 'file'))

        self.assertEqual(self.config.reorder_cubes(['file', 'forge', 'email']),

                          ('forge', 'email', 'file'))

        self.assertEqual(self.config.reorder_cubes(['forge', 'file', 'email']),

                          ('forge', 'email', 'file'))

        self.assertEqual(self.config.reorder_cubes(('forge', 'email', 'file')),

                          ('forge', 'email', 'file'))

    def test_reorder_cubes_recommends(self):

        from cubicweb_comment import __pkginfo__ as comment_pkginfo

        self._test_reorder_cubes_recommends(comment_pkginfo)

    def _test_reorder_cubes_recommends(self, comment_pkginfo):

        comment_pkginfo.__recommends_cubes__ = {'file': None}

        try:

            # email recommends comment

            # comment recommends file

            self.assertEqual(self.config.reorder_cubes(('forge', 'email', 'file', 'comment')),

                              ('forge', 'email', 'comment', 'file'))

            self.assertEqual(self.config.reorder_cubes(('forge', 'email', 'comment', 'file')),

                              ('forge', 'email', 'comment', 'file'))

            self.assertEqual(self.config.reorder_cubes(('forge', 'comment', 'email', 'file')),

                              ('forge', 'email', 'comment', 'file'))

            self.assertEqual(self.config.reorder_cubes(('comment', 'forge', 'email', 'file')),

                              ('forge', 'email', 'comment', 'file'))

        finally:

            comment_pkginfo.__recommends_cubes__ = {}

    def test_expand_cubes(self):

        self.assertEqual(self.config.expand_cubes(('email', 'comment')),

                          ['email', 'comment', 'file'])

    def test_init_cubes_ignore_pyramid_cube(self):

        warning_msg = 'cubicweb-pyramid got integrated into CubicWeb'

        with self.assertLogs('cubicweb.configuration', level='WARNING') as cm:

            self.config.init_cubes(['pyramid', 'card'])

        self.assertIn(warning_msg, cm.output[0])

        self.assertNotIn('pyramid', self.config._cubes)

class CubicWebConfigurationWithLegacyCubesTC(CubicWebConfigurationTC):

    @classmethod

    def setUpClass(cls):

        pass

    @classmethod

    def tearDownClass(cls):

        pass

    def setUp(self):

        self.custom_cubes_dir = self.datapath('legacy_cubes')

        cleanup_sys_modules([self.custom_cubes_dir, ApptestConfiguration.CUBES_DIR])

        super(CubicWebConfigurationWithLegacyCubesTC, self).setUp()

        self.config.__class__.CUBES_PATH = [self.custom_cubes_dir]

        self.config.adjust_sys_path()

    def tearDown(self):

        ApptestConfiguration.CUBES_PATH = []

    def test_available_cubes(self):

        expected_cubes = sorted(set([

            # local cubes

            'comment', 'email', 'file', 'forge', 'mycube',

            # test dependencies

            'card', 'file', 'localperms', 'tag',

        ]))

        self._test_available_cubes(expected_cubes)

    def test_reorder_cubes_recommends(self):

        from cubes.comment import __pkginfo__ as comment_pkginfo

        self._test_reorder_cubes_recommends(comment_pkginfo)

    def test_cubes_path(self):

        # make sure we don't import the email cube, but the stdlib email package

        import email

        self.assertNotEqual(dirname(email.__file__), self.config.CUBES_DIR)

        self.config.__class__.CUBES_PATH = [self.custom_cubes_dir]

        self.assertEqual(self.config.cubes_search_path(),

                          [self.custom_cubes_dir, self.config.CUBES_DIR])

        self.config.__class__.CUBES_PATH = [self.custom_cubes_dir,

                                            self.config.CUBES_DIR, 'unexistant']

        # filter out unexistant and duplicates

        self.assertEqual(self.config.cubes_search_path(),

                          [self.custom_cubes_dir,

                           self.config.CUBES_DIR])

        self.assertIn('mycube', self.config.available_cubes())

        # test cubes python path

        self.config.adjust_sys_path()

        import cubes

        self.assertEqual(cubes.__path__, self.config.cubes_search_path())

        # this import should succeed once path is adjusted

        from cubes import mycube

        self.assertEqual(mycube.__path__, [join(self.custom_cubes_dir, 'mycube')])

        # file cube should be overriden by the one found in data/cubes

            del cubes.file

        from cubes import file

        self.assertEqual(file.__path__, [join(self.custom_cubes_dir, 'file')])

    def test_config_value_from_environment(self):

        self.assertIsNone(self.config['base-url'])

        os.environ['CW_BASE_URL'] = 'https://www.cubicweb.org'

        try:

            self.assertEqual(self.config['base-url'],

                             'https://www.cubicweb.org')

        finally:

            del os.environ['CW_BASE_URL']

class FindPrefixTC(unittest.TestCase):

    def make_dirs(self, basedir, *args):

        path = join(basedir, *args)

        if not os.path.exists(path):

            os.makedirs(path)

        return path

    def make_file(self, basedir, *args):

        self.make_dirs(basedir, *args[:-1])

        file_path = join(basedir, *args)

        with open(file_path, 'w') as f:

            f.write('""" None """')

        return file_path

    def test_samedir(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            self.assertEqual(_find_prefix(prefix), prefix)

    def test_samedir_filepath(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            file_path = self.make_file(prefix, 'bob.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_dir_inside_prefix(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            dir_path = self.make_dirs(prefix, 'bob')

            self.assertEqual(_find_prefix(dir_path), prefix)

    def test_file_in_dir_inside_prefix(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            file_path = self.make_file(prefix, 'bob', 'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_file_in_deeper_dir_inside_prefix(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            file_path = self.make_file(prefix, 'bob', 'pyves', 'alain',

                                       'adim', 'syt', 'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_multiple_candidate_prefix(self):

        with TemporaryDirectory() as tempdir:

            self.make_dirs(tempdir, 'share', 'cubicweb')

            prefix = self.make_dirs(tempdir, 'bob')

            self.make_dirs(prefix, 'share', 'cubicweb')

            file_path = self.make_file(prefix, 'pyves', 'alain',

                                       'adim', 'syt', 'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_sister_candidate_prefix(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            self.make_dirs(prefix, 'bob', 'share', 'cubicweb')

            file_path = self.make_file(prefix, 'bell', 'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_multiple_parent_candidate_prefix(self):

        with TemporaryDirectory() as tempdir:

            self.make_dirs(tempdir, 'share', 'cubicweb')

            prefix = self.make_dirs(tempdir, 'share', 'cubicweb', 'bob')

            self.make_dirs(tempdir, 'share', 'cubicweb', 'bob', 'share',

                           'cubicweb')

            file_path = self.make_file(tempdir, 'share', 'cubicweb', 'bob',

                                       'pyves', 'alain', 'adim', 'syt',

                                       'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_upper_candidate_prefix(self):

        with TemporaryDirectory() as prefix:

            self.make_dirs(prefix, 'share', 'cubicweb')

            self.make_dirs(prefix, 'bell', 'bob',  'share', 'cubicweb')

            file_path = self.make_file(prefix, 'bell', 'toto.py')

            self.assertEqual(_find_prefix(file_path), prefix)

    def test_no_prefix(self):

        with TemporaryDirectory() as prefix:

            self.assertEqual(_find_prefix(prefix), sys.prefix)

    def test_virtualenv(self):

        venv = os.environ.get('VIRTUAL_ENV')

        try:

            with TemporaryDirectory() as prefix:

                os.environ['VIRTUAL_ENV'] = prefix

                self.make_dirs(prefix, 'share', 'cubicweb')

                self.assertEqual(_find_prefix(), prefix)

        finally:

            if venv:

                os.environ['VIRTUAL_ENV'] = venv

class ModnamesTC(unittest.TestCase):

    @templibdir

    def test_expand_modnames(self, libdir):

        tempdir = join(libdir, 'lib')