from datetime import date

from django.core.exceptions import ValidationError
from django.test import TestCase
from django.test.utils import override_settings
from django.utils import timezone

from mock import patch, MagicMock

from passlib.hash import sha512_crypt

from osusers.models import (
    CANNOT_USE_PRIMARY_GROUP_AS_ADDITIONAL,
    AdditionalGroup,
    DeleteTaskResult,
    Group,
    GroupTaskResult,
    Shadow,
    User,
    UserTaskResult,
)


@override_settings(
    CELERY_ALWAYS_EAGER=True,
    CELERY_CACHE_BACKEND='memory',
    BROKER_BACKEND='memory'
)
class TestCaseWithCeleryTasks(TestCase):
    pass


class AdditionalGroupTest(TestCaseWithCeleryTasks):
    def setUp(self):
        self.group1 = Group.objects.create(groupname='test1', gid=1000)
        self.user = User.objects.create(
            username='test', uid=1000, group=self.group1,
            homedir='/home/test', shell='/bin/bash')

    def test_clean_primary_group(self):
        testsubj = AdditionalGroup(user=self.user, group=self.group1)
        with self.assertRaises(ValidationError) as cm:
            testsubj.clean()
        self.assertEqual(
            cm.exception.message, CANNOT_USE_PRIMARY_GROUP_AS_ADDITIONAL)

    def test_clean_other_group(self):
        group2 = Group.objects.create(groupname='test2', gid=1001)
        testsubj = AdditionalGroup(user=self.user, group=group2)
        testsubj.clean()

    def test_save(self):
        group2 = Group.objects.create(groupname='test2', gid=1001)
        GroupTaskResult.objects.all().delete()
        addgroup = AdditionalGroup(user=self.user, group=group2)
        addgroup.save()
        taskres = GroupTaskResult.objects.all()
        self.assertTrue(len(taskres), 1)
        self.assertEqual(taskres[0].task_name, 'add_ldap_user_to_group')
        self.assertEqual(taskres[0].group, group2)

    def test_delete(self):
        group2 = Group.objects.create(groupname='test2', gid=1001)
        addgroup = AdditionalGroup.objects.create(user=self.user, group=group2)
        DeleteTaskResult.objects.all().delete()
        addgroup.delete()
        taskres = DeleteTaskResult.objects.all()
        self.assertTrue(len(taskres), 1)
        self.assertEqual(taskres[0].task_name, 'remove_ldap_user_from_group')
        self.assertEqual(taskres[0].modeltype, 'usergroup')
        self.assertEqual(taskres[0].modelname, 'test (1000) in test2 (1001)')
        self.assertEqual(len(AdditionalGroup.objects.all()), 0)

    def test___str__(self):
        group2 = Group.objects.create(groupname='test2', gid=1001)
        addgroup = AdditionalGroup.objects.create(user=self.user, group=group2)
        self.assertEqual(str(addgroup), 'test (1000) in test2 (1001)')


@override_settings(OSUSER_MINGID=10000)
class GroupManagerTest(TestCaseWithCeleryTasks):
    def test_get_next_gid_first(self):
        self.assertEqual(Group.objects.get_next_gid(), 10000)

    def test_get_next_gid_second(self):
        Group.objects.create(gid=10010, groupname='test')
        self.assertEqual(Group.objects.get_next_gid(), 10011)


class GroupTest(TestCaseWithCeleryTasks):
    def test___str__(self):
        group = Group.objects.create(gid=10000, groupname='test')
        self.assertEqual(str(group), 'test (10000)')

    def test_save(self):
        group = Group(gid=10000, groupname='test')
        self.assertIs(group.save(), group)
        taskres = GroupTaskResult.objects.all()
        self.assertEqual(len(taskres), 1)
        self.assertEqual(taskres[0].group, group)
        self.assertEqual(taskres[0].task_name, 'create_ldap_group')

    def test_delete(self):
        group = Group.objects.create(gid=10000, groupname='test')
        self.assertEqual(len(Group.objects.all()), 1)
        self.assertEqual(len(GroupTaskResult.objects.all()), 1)
        group.delete()
        self.assertEqual(len(Group.objects.all()), 0)
        self.assertEqual(len(GroupTaskResult.objects.all()), 0)
        taskres = DeleteTaskResult.objects.all()
        self.assertEqual(len(taskres), 1)
        self.assertEqual(taskres[0].task_name,
                         'delete_ldap_group_if_empty')
        self.assertEqual(taskres[0].modeltype, 'group')
        self.assertEqual(taskres[0].modelname, 'test')


class ShadowManagerTest(TestCaseWithCeleryTasks):
    def test_create_shadow(self):
        user = User(
            username='test', uid=1000,
            group=Group(gid=1000, groupname='test'),
            homedir='/home/test', shell='/bin/fooshell')
        shadow = Shadow.objects.create_shadow(user, 'test')
        self.assertTrue(sha512_crypt.verify('test', shadow.passwd))
        self.assertEqual(shadow.changedays,
                         (timezone.now().date() - date(1970, 1, 1)).days)
        self.assertEqual(shadow.user, user)
        self.assertEqual(shadow.minage, 0)
        self.assertIsNone(shadow.maxage)
        self.assertEqual(shadow.gracedays, 7)
        self.assertEqual(shadow.inactdays, 30)
        self.assertIsNone(shadow.expiredays)


class ShadowTest(TestCaseWithCeleryTasks):
    def test___str__(self):
        group = Group.objects.create(
            groupname='test', gid=1000)
        user = User.objects.create(
            username='test', uid=1000, group=group, homedir='/home/test',
            shell='/bin/bash')
        shadow = Shadow(user=user)
        self.assertEqual(str(shadow), 'for user test (1000)')

    def test_set_password(self):
        group = Group.objects.create(
            groupname='test', gid=1000)
        user = User.objects.create(
            username='test', uid=1000, group=group, homedir='/home/test',
            shell='/bin/bash')
        shadow = Shadow(user=user)
        shadow.set_password('test')
        self.assertTrue(sha512_crypt.verify('test', shadow.passwd))


TEST_TASK_UUID = '3120f6a8-2665-4fa3-a785-79efd28bfe92'
TEST_TASK_NAME = 'test.task'
TEST_TASK_RESULT = '4ll y0ur b453 4r3 b3l0ng t0 u5'


class TaskResultTest(TestCase):
    def test__set_result_fields_not_ready(self):
        mock = MagicMock(task_id=TEST_TASK_UUID, task_name=TEST_TASK_NAME)
        mock.ready.return_value = False
        tr = DeleteTaskResult.objects.create(mock, TEST_TASK_NAME)
        self.assertFalse(tr.is_finished)
        self.assertFalse(tr.is_success)
        self.assertEqual(tr.state, '')
        self.assertEqual(tr.result_body, '')

    def test__set_result_fields_ready(self):
        mock = MagicMock(task_id=TEST_TASK_UUID, task_name=TEST_TASK_NAME,
                         state='SUCCESS', result=TEST_TASK_RESULT)
        mock.ready.return_value = True
        tr = DeleteTaskResult.objects.create(mock, TEST_TASK_NAME)
        self.assertTrue(tr.is_finished)
        self.assertTrue(tr.is_success)
        self.assertEqual(tr.state, 'SUCCESS')
        self.assertEqual(tr.result_body, TEST_TASK_RESULT)

    def test__set_result_fields_exception(self):
        mock = MagicMock(task_id=TEST_TASK_UUID, task_name=TEST_TASK_NAME,
                         state='FAILURE', result=Exception('Fail'))
        mock.ready.return_value = True
        tr = DeleteTaskResult.objects.create(mock, TEST_TASK_NAME)
        self.assertTrue(tr.is_finished)
        self.assertFalse(tr.is_success)
        self.assertEqual(tr.state, 'FAILURE')
        self.assertEqual(tr.result_body, 'Fail')

    @patch('osusers.models.AsyncResult')
    def test_update_taskstatus_unfinished(self, asyncres):
        mock = MagicMock(task_id=TEST_TASK_UUID, task_name=TEST_TASK_NAME)
        mock.ready.return_value = False
        tr = DeleteTaskResult.objects.create(mock, TEST_TASK_NAME)
        self.assertFalse(tr.is_finished)
        mymock = asyncres(TEST_TASK_UUID)
        mymock.ready.return_value = True
        mymock.state = 'SUCCESS'
        mymock.result = TEST_RESULT
        tr.update_taskstatus()
        mymock.ready.assert_called_with()
        self.assertTrue(tr.is_finished)

    @patch('osusers.models.AsyncResult')
    def test_update_taskstatus_finished(self, asyncres):
        mock = MagicMock(task_id=TEST_TASK_UUID, task_name=TEST_TASK_NAME)
        mock.ready.return_value = True
        mock.state = 'SUCCESS'
        mock.result = TEST_RESULT
        tr = DeleteTaskResult.objects.create(mock, TEST_TASK_NAME)
        self.assertTrue(tr.is_finished)
        mymock = asyncres(TEST_TASK_UUID)
        tr.update_taskstatus()
        self.assertFalse(mymock.ready.called)
        self.assertTrue(tr.is_finished)


TEST_RESULT = MagicMock()
TEST_RESULT.task_id = TEST_TASK_UUID
TEST_RESULT.task_name = TEST_TASK_NAME
TEST_RESULT.ready.return_value = False


class TaskResultManagerTest(TestCase):
    def test_create(self):
        tr = DeleteTaskResult.objects.create(TEST_RESULT, TEST_TASK_NAME)
        self.assertIsInstance(tr, DeleteTaskResult)
        self.assertEqual(tr.task_uuid, TEST_TASK_UUID)
        self.assertEqual(tr.task_name, TEST_TASK_NAME)


@override_settings(
    OSUSER_MINUID=10000, OSUSER_MINGID=10000, OSUSER_USERNAME_PREFIX='test',
    OSUSER_HOME_BASEPATH='/home', OSUSER_DEFAULT_SHELL='/bin/fooshell'
)
class UserManagerTest(TestCaseWithCeleryTasks):
    def _create_group(self):
        return Group.objects.create(gid=10000, groupname='foo')

    def test_get_next_uid_first(self):
        self.assertEqual(User.objects.get_next_uid(), 10000)

    def test_get_next_uid_second(self):
        User.objects.create(
            uid=10010, username='foo', group=self._create_group(),
            homedir='/home/foo', shell='/bin/fooshell')
        self.assertEqual(User.objects.get_next_uid(), 10011)

    def test_get_next_username_first(self):
        self.assertEqual(User.objects.get_next_username(), 'test01')

    def test_get_next_username_second(self):
        User.objects.create(
            uid=10000, username='test01', group=self._create_group(),
            homedir='/home/foo', shell='/bin/fooshell')
        self.assertEqual(User.objects.get_next_username(), 'test02')

    def test_get_next_username_gaps(self):
        group = self._create_group()
        User.objects.create(
            uid=10000, username='test01', group=group,
            homedir='/home/foo', shell='/bin/fooshell')
        User.objects.create(
            uid=10002, username='test03', group=group,
            homedir='/home/foo', shell='/bin/fooshell')
        self.assertEqual(User.objects.get_next_username(), 'test02')

    def test_create_user_first(self):
        user = User.objects.create_user()
        self.assertIsInstance(user, User)
        self.assertEqual(user.uid, 10000)
        self.assertEqual(user.group.gid, 10000)
        self.assertEqual(user.group.groupname, 'test01')
        self.assertEqual(user.username, 'test01')
        self.assertEqual(user.homedir, '/home/test01')
        self.assertEqual(user.shell, '/bin/fooshell')
        self.assertIsNotNone(user.shadow)

    def test_create_user_tasks(self):
        user = User.objects.create_user()
        gtaskres = GroupTaskResult.objects.all()
        self.assertEqual(len(gtaskres), 1)
        self.assertEqual(gtaskres[0].task_name, 'create_ldap_group')
        self.assertEqual(gtaskres[0].group, user.group)

    def test_create_user_second(self):
        User.objects.create_user()
        user = User.objects.create_user()
        self.assertIsInstance(user, User)
        self.assertEqual(user.uid, 10001)
        self.assertEqual(user.group.gid, 10001)
        self.assertEqual(user.group.groupname, 'test02')
        self.assertEqual(user.username, 'test02')
        self.assertEqual(user.homedir, '/home/test02')
        self.assertEqual(user.shell, '/bin/fooshell')
        self.assertIsNotNone(user.shadow)
        self.assertEqual(len(User.objects.all()), 2)

    def test_create_user_known_password(self):
        user = User.objects.create_user(password='foobar')
        self.assertIsInstance(user, User)
        self.assertEqual(user.uid, 10000)
        self.assertEqual(user.group.gid, 10000)
        self.assertEqual(user.group.groupname, 'test01')
        self.assertEqual(user.username, 'test01')
        self.assertEqual(user.homedir, '/home/test01')
        self.assertEqual(user.shell, '/bin/fooshell')
        self.assertIsNotNone(user.shadow)
        self.assertTrue(sha512_crypt.verify('foobar', user.shadow.passwd))

    def test_create_user_predefined_username(self):
        user = User.objects.create_user(username='tester')
        self.assertIsInstance(user, User)
        self.assertEqual(user.uid, 10000)
        self.assertEqual(user.group.gid, 10000)
        self.assertEqual(user.group.groupname, 'tester')
        self.assertEqual(user.username, 'tester')
        self.assertEqual(user.homedir, '/home/tester')
        self.assertEqual(user.shell, '/bin/fooshell')
        self.assertIsNotNone(user.shadow)

    def test_create_user_commit(self):
        user = User.objects.create_user(commit=True)
        self.assertIsInstance(user, User)
        self.assertEqual(user.uid, 10000)
        self.assertEqual(user.group.gid, 10000)
        self.assertEqual(user.group.groupname, 'test01')
        self.assertEqual(user.username, 'test01')
        self.assertEqual(user.homedir, '/home/test01')
        self.assertEqual(user.shell, '/bin/fooshell')
        self.assertIsNotNone(user.shadow)


@override_settings(
    OSUSER_MINUID=10000, OSUSER_MINGID=10000, OSUSER_USERNAME_PREFIX='test',
    OSUSER_HOME_BASEPATH='/home', OSUSER_DEFAULT_SHELL='/bin/fooshell'
)
class UserTest(TestCaseWithCeleryTasks):

    def test___str__(self):
        user = User.objects.create_user()
        self.assertEqual(str(user), 'test01 (10000)')

    def test_set_password(self):
        user = User.objects.create_user()
        self.assertFalse(sha512_crypt.verify('test', user.shadow.passwd))
        UserTaskResult.objects.all().delete()
        user.set_password('test')
        self.assertTrue(sha512_crypt.verify('test', user.shadow.passwd))
        taskres = UserTaskResult.objects.all()
        self.assertEqual(len(taskres), 1)
        self.assertEqual(taskres[0].user, user)
        self.assertEqual(taskres[0].task_name, 'create_ldap_user')

    def test_save(self):
        user = User.objects.create_user()
        UserTaskResult.objects.all().delete()
        user.save()
        taskres = UserTaskResult.objects.all()
        self.assertEqual(len(taskres), 1)
        self.assertEqual(taskres[0].user, user)
        self.assertEqual(taskres[0].task_name, 'create_ldap_user')

    def test_delete_only_user(self):
        user = User.objects.create_user()
        user.delete()
        taskres = DeleteTaskResult.objects.all()
        self.assertEqual(len(taskres), 2)
        self.assertIn('delete_ldap_user',
                      [r.task_name for r in taskres])
        self.assertIn('delete_ldap_group_if_empty',
                      [r.task_name for r in taskres])
        self.assertEqual(len(User.objects.all()), 0)

    def test_delete_additional_groups(self):
        group1 = Group.objects.create(gid=2000, groupname='group1')
        group2 = Group.objects.create(gid=2001, groupname='group2')
        user = User.objects.create_user()
        for group in [group1, group2]:
            user.additionalgroup_set.add(
                AdditionalGroup.objects.create(user=user, group=group))
        user.delete()
        taskres = DeleteTaskResult.objects.all()
        self.assertEqual(len(taskres), 4)
        tasknames = [t.task_name for t in taskres]
        self.assertEqual(tasknames.count('remove_ldap_user_from_group'), 2)
        self.assertEqual(tasknames.count('delete_ldap_user'), 1)
        self.assertEqual(tasknames.count('delete_ldap_group_if_empty'), 1)
        self.assertEqual(len(User.objects.all()), 0)
        self.assertEqual(len(AdditionalGroup.objects.all()), 0)