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

import copy
import os

from tests.unittests.helpers import CiTestCase, skipUnlessJsonSchema, mock
from cloudinit.config.schema import (
    SchemaValidationError, validate_cloudconfig_schema)
from cloudinit.config import cc_ubuntu_drivers as drivers
from cloudinit.subp import ProcessExecutionError

MPATH = "cloudinit.config.cc_ubuntu_drivers."
M_TMP_PATH = MPATH + "temp_utils.mkdtemp"
OLD_UBUNTU_DRIVERS_ERROR_STDERR = (
    "ubuntu-drivers: error: argument <command>: invalid choice: 'install' "
    "(choose from 'list', 'autoinstall', 'devices', 'debug')\n")


# The tests in this module call helper methods which are decorated with
# mock.patch.  pylint doesn't understand that mock.patch passes parameters to
# the decorated function, so it incorrectly reports that we aren't passing
# values for all parameters.  Instead of annotating every single call, we
# disable it for the entire module:
#  pylint: disable=no-value-for-parameter

class AnyTempScriptAndDebconfFile(object):

    def __init__(self, tmp_dir, debconf_file):
        self.tmp_dir = tmp_dir
        self.debconf_file = debconf_file

    def __eq__(self, cmd):
        if not len(cmd) == 2:
            return False
        script, debconf_file = cmd
        if bool(script.startswith(self.tmp_dir) and script.endswith('.sh')):
            return debconf_file == self.debconf_file
        return False


class TestUbuntuDrivers(CiTestCase):
    cfg_accepted = {'drivers': {'nvidia': {'license-accepted': True}}}
    install_gpgpu = ['ubuntu-drivers', 'install', '--gpgpu', 'nvidia']

    with_logs = True

    @skipUnlessJsonSchema()
    def test_schema_requires_boolean_for_license_accepted(self):
        with self.assertRaisesRegex(
                SchemaValidationError, ".*license-accepted.*TRUE.*boolean"):
            validate_cloudconfig_schema(
                {'drivers': {'nvidia': {'license-accepted': "TRUE"}}},
                schema=drivers.schema, strict=True)

    @mock.patch(M_TMP_PATH)
    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
    @mock.patch(MPATH + "subp.which", return_value=False)
    def _assert_happy_path_taken(
            self, config, m_which, m_subp, m_tmp):
        """Positive path test through handle. Package should be installed."""
        tdir = self.tmp_dir()
        debconf_file = os.path.join(tdir, 'nvidia.template')
        m_tmp.return_value = tdir
        myCloud = mock.MagicMock()
        drivers.handle('ubuntu_drivers', config, myCloud, None, None)
        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
                         myCloud.distro.install_packages.call_args_list)
        self.assertEqual(
            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
             mock.call(self.install_gpgpu)],
            m_subp.call_args_list)

    def test_handle_does_package_install(self):
        self._assert_happy_path_taken(self.cfg_accepted)

    def test_trueish_strings_are_considered_approval(self):
        for true_value in ['yes', 'true', 'on', '1']:
            new_config = copy.deepcopy(self.cfg_accepted)
            new_config['drivers']['nvidia']['license-accepted'] = true_value
            self._assert_happy_path_taken(new_config)

    @mock.patch(M_TMP_PATH)
    @mock.patch(MPATH + "subp.subp")
    @mock.patch(MPATH + "subp.which", return_value=False)
    def test_handle_raises_error_if_no_drivers_found(
            self, m_which, m_subp, m_tmp):
        """If ubuntu-drivers doesn't install any drivers, raise an error."""
        tdir = self.tmp_dir()
        debconf_file = os.path.join(tdir, 'nvidia.template')
        m_tmp.return_value = tdir
        myCloud = mock.MagicMock()

        def fake_subp(cmd):
            if cmd[0].startswith(tdir):
                return
            raise ProcessExecutionError(
                stdout='No drivers found for installation.\n', exit_code=1)
        m_subp.side_effect = fake_subp

        with self.assertRaises(Exception):
            drivers.handle(
                'ubuntu_drivers', self.cfg_accepted, myCloud, None, None)
        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
                         myCloud.distro.install_packages.call_args_list)
        self.assertEqual(
            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
             mock.call(self.install_gpgpu)],
            m_subp.call_args_list)
        self.assertIn('ubuntu-drivers found no drivers for installation',
                      self.logs.getvalue())

    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
    @mock.patch(MPATH + "subp.which", return_value=False)
    def _assert_inert_with_config(self, config, m_which, m_subp):
        """Helper to reduce repetition when testing negative cases"""
        myCloud = mock.MagicMock()
        drivers.handle('ubuntu_drivers', config, myCloud, None, None)
        self.assertEqual(0, myCloud.distro.install_packages.call_count)
        self.assertEqual(0, m_subp.call_count)

    def test_handle_inert_if_license_not_accepted(self):
        """Ensure we don't do anything if the license is rejected."""
        self._assert_inert_with_config(
            {'drivers': {'nvidia': {'license-accepted': False}}})

    def test_handle_inert_if_garbage_in_license_field(self):
        """Ensure we don't do anything if unknown text is in license field."""
        self._assert_inert_with_config(
            {'drivers': {'nvidia': {'license-accepted': 'garbage'}}})

    def test_handle_inert_if_no_license_key(self):
        """Ensure we don't do anything if no license key."""
        self._assert_inert_with_config({'drivers': {'nvidia': {}}})

    def test_handle_inert_if_no_nvidia_key(self):
        """Ensure we don't do anything if other license accepted."""
        self._assert_inert_with_config(
            {'drivers': {'acme': {'license-accepted': True}}})

    def test_handle_inert_if_string_given(self):
        """Ensure we don't do anything if string refusal given."""
        for false_value in ['no', 'false', 'off', '0']:
            self._assert_inert_with_config(
                {'drivers': {'nvidia': {'license-accepted': false_value}}})

    @mock.patch(MPATH + "install_drivers")
    def test_handle_no_drivers_does_nothing(self, m_install_drivers):
        """If no 'drivers' key in the config, nothing should be done."""
        myCloud = mock.MagicMock()
        myLog = mock.MagicMock()
        drivers.handle('ubuntu_drivers', {'foo': 'bzr'}, myCloud, myLog, None)
        self.assertIn('Skipping module named',
                      myLog.debug.call_args_list[0][0][0])
        self.assertEqual(0, m_install_drivers.call_count)

    @mock.patch(M_TMP_PATH)
    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
    @mock.patch(MPATH + "subp.which", return_value=True)
    def test_install_drivers_no_install_if_present(
            self, m_which, m_subp, m_tmp):
        """If 'ubuntu-drivers' is present, no package install should occur."""
        tdir = self.tmp_dir()
        debconf_file = os.path.join(tdir, 'nvidia.template')
        m_tmp.return_value = tdir
        pkg_install = mock.MagicMock()
        drivers.install_drivers(self.cfg_accepted['drivers'],
                                pkg_install_func=pkg_install)
        self.assertEqual(0, pkg_install.call_count)
        self.assertEqual([mock.call('ubuntu-drivers')],
                         m_which.call_args_list)
        self.assertEqual(
            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
             mock.call(self.install_gpgpu)],
            m_subp.call_args_list)

    def test_install_drivers_rejects_invalid_config(self):
        """install_drivers should raise TypeError if not given a config dict"""
        pkg_install = mock.MagicMock()
        with self.assertRaisesRegex(TypeError, ".*expected dict.*"):
            drivers.install_drivers("mystring", pkg_install_func=pkg_install)
        self.assertEqual(0, pkg_install.call_count)

    @mock.patch(M_TMP_PATH)
    @mock.patch(MPATH + "subp.subp")
    @mock.patch(MPATH + "subp.which", return_value=False)
    def test_install_drivers_handles_old_ubuntu_drivers_gracefully(
            self, m_which, m_subp, m_tmp):
        """Older ubuntu-drivers versions should emit message and raise error"""
        tdir = self.tmp_dir()
        debconf_file = os.path.join(tdir, 'nvidia.template')
        m_tmp.return_value = tdir
        myCloud = mock.MagicMock()

        def fake_subp(cmd):
            if cmd[0].startswith(tdir):
                return
            raise ProcessExecutionError(
                stderr=OLD_UBUNTU_DRIVERS_ERROR_STDERR, exit_code=2)
        m_subp.side_effect = fake_subp

        with self.assertRaises(Exception):
            drivers.handle(
                'ubuntu_drivers', self.cfg_accepted, myCloud, None, None)
        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
                         myCloud.distro.install_packages.call_args_list)
        self.assertEqual(
            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
             mock.call(self.install_gpgpu)],
            m_subp.call_args_list)
        self.assertIn('WARNING: the available version of ubuntu-drivers is'
                      ' too old to perform requested driver installation',
                      self.logs.getvalue())


# Sub-class TestUbuntuDrivers to run the same test cases, but with a version
class TestUbuntuDriversWithVersion(TestUbuntuDrivers):
    cfg_accepted = {
        'drivers': {'nvidia': {'license-accepted': True, 'version': '123'}}}
    install_gpgpu = ['ubuntu-drivers', 'install', '--gpgpu', 'nvidia:123']

    @mock.patch(M_TMP_PATH)
    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
    @mock.patch(MPATH + "subp.which", return_value=False)
    def test_version_none_uses_latest(self, m_which, m_subp, m_tmp):
        tdir = self.tmp_dir()
        debconf_file = os.path.join(tdir, 'nvidia.template')
        m_tmp.return_value = tdir
        myCloud = mock.MagicMock()
        version_none_cfg = {
            'drivers': {'nvidia': {'license-accepted': True, 'version': None}}}
        drivers.handle(
            'ubuntu_drivers', version_none_cfg, myCloud, None, None)
        self.assertEqual(
            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
             mock.call(['ubuntu-drivers', 'install', '--gpgpu', 'nvidia'])],
            m_subp.call_args_list)

    def test_specifying_a_version_doesnt_override_license_acceptance(self):
        self._assert_inert_with_config({
            'drivers': {'nvidia': {'license-accepted': False,
                                   'version': '123'}}
        })

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