# This file is part of cloud-init. See LICENSE file for license information.

from cloudinit.config.cc_ubuntu_advantage import (
    configure_ua, handle, maybe_install_ua_tools, schema)
from cloudinit.config.schema import validate_cloudconfig_schema
from cloudinit import subp
from cloudinit.tests.helpers import (
    CiTestCase, mock, SchemaTestCaseMixin, skipUnlessJsonSchema)


# Module path used in mocks
MPATH = 'cloudinit.config.cc_ubuntu_advantage'


class FakeCloud(object):
    def __init__(self, distro):
        self.distro = distro


class TestConfigureUA(CiTestCase):

    with_logs = True
    allowed_subp = [CiTestCase.SUBP_SHELL_TRUE]

    def setUp(self):
        super(TestConfigureUA, self).setUp()
        self.tmp = self.tmp_dir()

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_error(self, m_subp):
        """Errors from ua attach command are raised."""
        m_subp.side_effect = subp.ProcessExecutionError(
            'Invalid token SomeToken')
        with self.assertRaises(RuntimeError) as context_manager:
            configure_ua(token='SomeToken')
        self.assertEqual(
            'Failure attaching Ubuntu Advantage:\nUnexpected error while'
            ' running command.\nCommand: -\nExit code: -\nReason: -\n'
            'Stdout: Invalid token SomeToken\nStderr: -',
            str(context_manager.exception))

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_with_token(self, m_subp):
        """When token is provided, attach the machine to ua using the token."""
        configure_ua(token='SomeToken')
        m_subp.assert_called_once_with(['ua', 'attach', 'SomeToken'])
        self.assertEqual(
            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
            self.logs.getvalue())

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_on_service_error(self, m_subp):
        """all services should be enabled and then any failures raised"""

        def fake_subp(cmd, capture=None):
            fail_cmds = [['ua', 'enable', svc] for svc in ['esm', 'cc']]
            if cmd in fail_cmds and capture:
                svc = cmd[-1]
                raise subp.ProcessExecutionError(
                    'Invalid {} credentials'.format(svc.upper()))

        m_subp.side_effect = fake_subp

        with self.assertRaises(RuntimeError) as context_manager:
            configure_ua(token='SomeToken', enable=['esm', 'cc', 'fips'])
        self.assertEqual(
            m_subp.call_args_list,
            [mock.call(['ua', 'attach', 'SomeToken']),
             mock.call(['ua', 'enable', 'esm'], capture=True),
             mock.call(['ua', 'enable', 'cc'], capture=True),
             mock.call(['ua', 'enable', 'fips'], capture=True)])
        self.assertIn(
            'WARNING: Failure enabling "esm":\nUnexpected error'
            ' while running command.\nCommand: -\nExit code: -\nReason: -\n'
            'Stdout: Invalid ESM credentials\nStderr: -\n',
            self.logs.getvalue())
        self.assertIn(
            'WARNING: Failure enabling "cc":\nUnexpected error'
            ' while running command.\nCommand: -\nExit code: -\nReason: -\n'
            'Stdout: Invalid CC credentials\nStderr: -\n',
            self.logs.getvalue())
        self.assertEqual(
            'Failure enabling Ubuntu Advantage service(s): "esm", "cc"',
            str(context_manager.exception))

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_with_empty_services(self, m_subp):
        """When services is an empty list, do not auto-enable attach."""
        configure_ua(token='SomeToken', enable=[])
        m_subp.assert_called_once_with(['ua', 'attach', 'SomeToken'])
        self.assertEqual(
            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
            self.logs.getvalue())

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_with_specific_services(self, m_subp):
        """When services a list, only enable specific services."""
        configure_ua(token='SomeToken', enable=['fips'])
        self.assertEqual(
            m_subp.call_args_list,
            [mock.call(['ua', 'attach', 'SomeToken']),
             mock.call(['ua', 'enable', 'fips'], capture=True)])
        self.assertEqual(
            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
            self.logs.getvalue())

    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_with_string_services(self, m_subp):
        """When services a string, treat as singleton list and warn"""
        configure_ua(token='SomeToken', enable='fips')
        self.assertEqual(
            m_subp.call_args_list,
            [mock.call(['ua', 'attach', 'SomeToken']),
             mock.call(['ua', 'enable', 'fips'], capture=True)])
        self.assertEqual(
            'WARNING: ubuntu_advantage: enable should be a list, not a'
            ' string; treating as a single enable\n'
            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
            self.logs.getvalue())

    @mock.patch('%s.subp.subp' % MPATH)
    def test_configure_ua_attach_with_weird_services(self, m_subp):
        """When services not string or list, warn but still attach"""
        configure_ua(token='SomeToken', enable={'deffo': 'wont work'})
        self.assertEqual(
            m_subp.call_args_list,
            [mock.call(['ua', 'attach', 'SomeToken'])])
        self.assertEqual(
            'WARNING: ubuntu_advantage: enable should be a list, not a'
            ' dict; skipping enabling services\n'
            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
            self.logs.getvalue())


@skipUnlessJsonSchema()
class TestSchema(CiTestCase, SchemaTestCaseMixin):

    with_logs = True
    schema = schema

    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    @mock.patch('%s.configure_ua' % MPATH)
    def test_schema_warns_on_ubuntu_advantage_not_dict(self, _cfg, _):
        """If ubuntu_advantage configuration is not a dict, emit a warning."""
        validate_cloudconfig_schema({'ubuntu_advantage': 'wrong type'}, schema)
        self.assertEqual(
            "WARNING: Invalid config:\nubuntu_advantage: 'wrong type' is not"
            " of type 'object'\n",
            self.logs.getvalue())

    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    @mock.patch('%s.configure_ua' % MPATH)
    def test_schema_disallows_unknown_keys(self, _cfg, _):
        """Unknown keys in ubuntu_advantage configuration emit warnings."""
        validate_cloudconfig_schema(
            {'ubuntu_advantage': {'token': 'winner', 'invalid-key': ''}},
            schema)
        self.assertIn(
            'WARNING: Invalid config:\nubuntu_advantage: Additional properties'
            " are not allowed ('invalid-key' was unexpected)",
            self.logs.getvalue())

    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    @mock.patch('%s.configure_ua' % MPATH)
    def test_warn_schema_requires_token(self, _cfg, _):
        """Warn if ubuntu_advantage configuration lacks token."""
        validate_cloudconfig_schema(
            {'ubuntu_advantage': {'enable': ['esm']}}, schema)
        self.assertEqual(
            "WARNING: Invalid config:\nubuntu_advantage:"
            " 'token' is a required property\n", self.logs.getvalue())

    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    @mock.patch('%s.configure_ua' % MPATH)
    def test_warn_schema_services_is_not_list_or_dict(self, _cfg, _):
        """Warn when ubuntu_advantage:enable config is not a list."""
        validate_cloudconfig_schema(
            {'ubuntu_advantage': {'enable': 'needslist'}}, schema)
        self.assertEqual(
            "WARNING: Invalid config:\nubuntu_advantage: 'token' is a"
            " required property\nubuntu_advantage.enable: 'needslist'"
            " is not of type 'array'\n",
            self.logs.getvalue())


class TestHandle(CiTestCase):

    with_logs = True

    def setUp(self):
        super(TestHandle, self).setUp()
        self.tmp = self.tmp_dir()

    @mock.patch('%s.validate_cloudconfig_schema' % MPATH)
    def test_handle_no_config(self, m_schema):
        """When no ua-related configuration is provided, nothing happens."""
        cfg = {}
        handle('ua-test', cfg=cfg, cloud=None, log=self.logger, args=None)
        self.assertIn(
            "DEBUG: Skipping module named ua-test, no 'ubuntu_advantage'"
            ' configuration found',
            self.logs.getvalue())
        m_schema.assert_not_called()

    @mock.patch('%s.configure_ua' % MPATH)
    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    def test_handle_tries_to_install_ubuntu_advantage_tools(
            self, m_install, m_cfg):
        """If ubuntu_advantage is provided, try installing ua-tools package."""
        cfg = {'ubuntu_advantage': {'token': 'valid'}}
        mycloud = FakeCloud(None)
        handle('nomatter', cfg=cfg, cloud=mycloud, log=self.logger, args=None)
        m_install.assert_called_once_with(mycloud)

    @mock.patch('%s.configure_ua' % MPATH)
    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
    def test_handle_passes_credentials_and_services_to_configure_ua(
            self, m_install, m_configure_ua):
        """All ubuntu_advantage config keys are passed to configure_ua."""
        cfg = {'ubuntu_advantage': {'token': 'token', 'enable': ['esm']}}
        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
        m_configure_ua.assert_called_once_with(
            token='token', enable=['esm'])

    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
    @mock.patch('%s.configure_ua' % MPATH)
    def test_handle_warns_on_deprecated_ubuntu_advantage_key_w_config(
            self, m_configure_ua):
        """Warning when ubuntu-advantage key is present with new config"""
        cfg = {'ubuntu-advantage': {'token': 'token', 'enable': ['esm']}}
        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
        self.assertEqual(
            'WARNING: Deprecated configuration key "ubuntu-advantage"'
            ' provided. Expected underscore delimited "ubuntu_advantage";'
            ' will attempt to continue.',
            self.logs.getvalue().splitlines()[0])
        m_configure_ua.assert_called_once_with(
            token='token', enable=['esm'])

    def test_handle_error_on_deprecated_commands_key_dashed(self):
        """Error when commands is present in ubuntu-advantage key."""
        cfg = {'ubuntu-advantage': {'commands': 'nogo'}}
        with self.assertRaises(RuntimeError) as context_manager:
            handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
        self.assertEqual(
            'Deprecated configuration "ubuntu-advantage: commands" provided.'
            ' Expected "token"',
            str(context_manager.exception))

    def test_handle_error_on_deprecated_commands_key_underscored(self):
        """Error when commands is present in ubuntu_advantage key."""
        cfg = {'ubuntu_advantage': {'commands': 'nogo'}}
        with self.assertRaises(RuntimeError) as context_manager:
            handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
        self.assertEqual(
            'Deprecated configuration "ubuntu-advantage: commands" provided.'
            ' Expected "token"',
            str(context_manager.exception))

    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
    @mock.patch('%s.configure_ua' % MPATH)
    def test_handle_prefers_new_style_config(
            self, m_configure_ua):
        """ubuntu_advantage should be preferred over ubuntu-advantage"""
        cfg = {
            'ubuntu-advantage': {'token': 'nope', 'enable': ['wrong']},
            'ubuntu_advantage': {'token': 'token', 'enable': ['esm']},
        }
        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
        self.assertEqual(
            'WARNING: Deprecated configuration key "ubuntu-advantage"'
            ' provided. Expected underscore delimited "ubuntu_advantage";'
            ' will attempt to continue.',
            self.logs.getvalue().splitlines()[0])
        m_configure_ua.assert_called_once_with(
            token='token', enable=['esm'])


class TestMaybeInstallUATools(CiTestCase):

    with_logs = True

    def setUp(self):
        super(TestMaybeInstallUATools, self).setUp()
        self.tmp = self.tmp_dir()

    @mock.patch('%s.subp.which' % MPATH)
    def test_maybe_install_ua_tools_noop_when_ua_tools_present(self, m_which):
        """Do nothing if ubuntu-advantage-tools already exists."""
        m_which.return_value = '/usr/bin/ua'  # already installed
        distro = mock.MagicMock()
        distro.update_package_sources.side_effect = RuntimeError(
            'Some apt error')
        maybe_install_ua_tools(cloud=FakeCloud(distro))  # No RuntimeError

    @mock.patch('%s.subp.which' % MPATH)
    def test_maybe_install_ua_tools_raises_update_errors(self, m_which):
        """maybe_install_ua_tools logs and raises apt update errors."""
        m_which.return_value = None
        distro = mock.MagicMock()
        distro.update_package_sources.side_effect = RuntimeError(
            'Some apt error')
        with self.assertRaises(RuntimeError) as context_manager:
            maybe_install_ua_tools(cloud=FakeCloud(distro))
        self.assertEqual('Some apt error', str(context_manager.exception))
        self.assertIn('Package update failed\nTraceback', self.logs.getvalue())

    @mock.patch('%s.subp.which' % MPATH)
    def test_maybe_install_ua_raises_install_errors(self, m_which):
        """maybe_install_ua_tools logs and raises package install errors."""
        m_which.return_value = None
        distro = mock.MagicMock()
        distro.update_package_sources.return_value = None
        distro.install_packages.side_effect = RuntimeError(
            'Some install error')
        with self.assertRaises(RuntimeError) as context_manager:
            maybe_install_ua_tools(cloud=FakeCloud(distro))
        self.assertEqual('Some install error', str(context_manager.exception))
        self.assertIn(
            'Failed to install ubuntu-advantage-tools\n', self.logs.getvalue())

    @mock.patch('%s.subp.which' % MPATH)
    def test_maybe_install_ua_tools_happy_path(self, m_which):
        """maybe_install_ua_tools installs ubuntu-advantage-tools."""
        m_which.return_value = None
        distro = mock.MagicMock()  # No errors raised
        maybe_install_ua_tools(cloud=FakeCloud(distro))
        distro.update_package_sources.assert_called_once_with()
        distro.install_packages.assert_called_once_with(
            ['ubuntu-advantage-tools'])

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