# -*- coding: utf-8 -*-
'''
    :codeauthor: Pedro Algarvio (pedro@algarvio.me)


    tests.unit.utils.cloud_test
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Test the salt-cloud utilities module
'''

# Import Python libs
from __future__ import absolute_import, print_function, unicode_literals
import os
import shutil
import tempfile

# Import Salt Testing libs
from tests.support.runtime import RUNTIME_VARS
from tests.support.unit import TestCase, skipIf, SkipTest

# Import salt libs
import salt.utils.cloud as cloud
import salt.utils.platform
from salt.ext import six


class CloudUtilsTestCase(TestCase):

    @classmethod
    def setUpClass(cls):
        old_cwd = os.getcwd()
        cls.gpg_keydir = gpg_keydir = os.path.join(RUNTIME_VARS.TMP, 'gpg-keydir')
        try:
            # The keyring library uses `getcwd()`, let's make sure we in a good directory
            # before importing keyring
            if not os.path.isdir(gpg_keydir):
                os.makedirs(gpg_keydir)
            os.chdir(gpg_keydir)

            # Late import because of the above reason
            import keyring
            import keyring.backend

            class CustomKeyring(keyring.backend.KeyringBackend):
                '''
                A test keyring which always outputs same password
                '''
                def __init__(self):
                    self.__storage = {}

                def supported(self):
                    return 0

                def set_password(self, servicename, username, password):
                    self.__storage.setdefault(servicename, {}).update({username: password})
                    return 0

                def get_password(self, servicename, username):
                    return self.__storage.setdefault(servicename, {}).get(username, None)

                def delete_password(self, servicename, username):
                    self.__storage.setdefault(servicename, {}).pop(username, None)
                    return 0

            # set the keyring for keyring lib
            keyring.set_keyring(CustomKeyring())
        except ImportError:
            raise SkipTest('The "keyring" python module is not installed')
        finally:
            os.chdir(old_cwd)

    @classmethod
    def tearDownClass(cls):
        if os.path.exists(cls.gpg_keydir):
            shutil.rmtree(cls.gpg_keydir)
        del cls.gpg_keydir

    def test_ssh_password_regex(self):
        '''Test matching ssh password patterns'''
        for pattern in ('Password for root@127.0.0.1:',
                        'root@127.0.0.1 Password:',
                        ' Password:'):
            self.assertNotEqual(
                cloud.SSH_PASSWORD_PROMP_RE.match(pattern), None
            )
            self.assertNotEqual(
                cloud.SSH_PASSWORD_PROMP_RE.match(pattern.lower()), None
            )
            self.assertNotEqual(
                cloud.SSH_PASSWORD_PROMP_RE.match(pattern.strip()), None
            )
            self.assertNotEqual(
                cloud.SSH_PASSWORD_PROMP_RE.match(pattern.lower().strip()), None
            )

    def test__save_password_in_keyring(self):
        '''
        Test storing password in the keyring
        '''
        # Late import
        import keyring
        cloud._save_password_in_keyring(
            'salt.cloud.provider.test_case_provider',
            'fake_username',
            'fake_password_c8231'
        )
        stored_pw = keyring.get_password(
                'salt.cloud.provider.test_case_provider',
                'fake_username',
        )
        keyring.delete_password(
                    'salt.cloud.provider.test_case_provider',
                    'fake_username',
        )
        self.assertEqual(stored_pw, 'fake_password_c8231')

    def test_retrieve_password_from_keyring(self):
        # Late import
        import keyring
        keyring.set_password(
            'salt.cloud.provider.test_case_provider',
            'fake_username',
            'fake_password_c8231'
        )
        pw_in_keyring = cloud.retrieve_password_from_keyring(
            'salt.cloud.provider.test_case_provider',
            'fake_username')
        self.assertEqual(pw_in_keyring, 'fake_password_c8231')

    def test_sftp_file_with_content_under_python3(self):
        with self.assertRaises(Exception) as context:
            cloud.sftp_file("/tmp/test", "ТЕСТ test content")
        # we successful pass the place with os.write(tmpfd, ...
        self.assertNotEqual("a bytes-like object is required, not 'str'", six.text_type(context.exception))

    @skipIf(salt.utils.platform.is_windows(), 'Not applicable to Windows')
    def test_check_key_path_and_mode(self):
        with tempfile.NamedTemporaryFile() as f:
            key_file = f.name

            os.chmod(key_file, 0o644)
            self.assertFalse(cloud.check_key_path_and_mode('foo', key_file))
            os.chmod(key_file, 0o600)
            self.assertTrue(cloud.check_key_path_and_mode('foo', key_file))
            os.chmod(key_file, 0o400)
            self.assertTrue(cloud.check_key_path_and_mode('foo', key_file))

        # tmp file removed
        self.assertFalse(cloud.check_key_path_and_mode('foo', key_file))