import os
from unittest import mock

from cloudinit.config import cc_apt_configure
from cloudinit import subp
from cloudinit import util

TEST_KEY_HUMAN = '''
/etc/apt/cloud-init.gpg.d/my_key.gpg
--------------------------------------------
pub   rsa4096 2021-10-22 [SC]
      3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85
uid           [ unknown] Brett Holman <brett.holman@canonical.com>
sub   rsa4096 2021-10-22 [A]
sub   rsa4096 2021-10-22 [E]
'''

TEST_KEY_MACHINE = '''
tru::1:1635129362:0:3:1:5
pub:-:4096:1:F83F77129A5EBD85:1634912922:::-:::scESCA::::::23::0:
fpr:::::::::3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85:
uid:-::::1634912922::64F1F1D6FA96316752D635D7C6406C52C40713C7::Brett Holman \
<brett.holman@canonical.com>::::::::::0:
sub:-:4096:1:544B39C9A9141F04:1634912922::::::a::::::23:
fpr:::::::::8BD901490D6EC986D03D6F0D544B39C9A9141F04:
sub:-:4096:1:F45D9443F0A87092:1634912922::::::e::::::23:
fpr:::::::::8CCCB332317324F030A45B19F45D9443F0A87092:
'''

TEST_KEY_FINGERPRINT_HUMAN = \
    '3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85'

TEST_KEY_FINGERPRINT_MACHINE = \
    '3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85'


class TestAptKey:
    """TestAptKey
    Class to test apt-key commands
    """
    @mock.patch.object(subp, 'subp', return_value=('fakekey', ''))
    @mock.patch.object(util, 'write_file')
    def _apt_key_add_success_helper(self, directory, *args, hardened=False):
        file = cc_apt_configure.apt_key(
            'add',
            output_file='my-key',
            data='fakekey',
            hardened=hardened)
        assert file == directory + '/my-key.gpg'

    def test_apt_key_add_success(self):
        """Verify the correct directory path gets returned for unhardened case
        """
        self._apt_key_add_success_helper('/etc/apt/trusted.gpg.d')

    def test_apt_key_add_success_hardened(self):
        """Verify the correct directory path gets returned for hardened case
        """
        self._apt_key_add_success_helper(
            '/etc/apt/cloud-init.gpg.d',
            hardened=True)

    def test_apt_key_add_fail_no_file_name(self):
        """Verify that null filename gets handled correctly
        """
        file = cc_apt_configure.apt_key(
            'add',
            output_file=None,
            data='')
        assert '/dev/null' == file

    def _apt_key_fail_helper(self):
        file = cc_apt_configure.apt_key(
            'add',
            output_file='my-key',
            data='fakekey')
        assert file == '/dev/null'

    @mock.patch.object(subp, 'subp', side_effect=subp.ProcessExecutionError)
    def test_apt_key_add_fail_no_file_name_subproc(self, *args):
        """Verify that bad key value gets handled correctly
        """
        self._apt_key_fail_helper()

    @mock.patch.object(
        subp, 'subp', side_effect=UnicodeDecodeError('test', b'', 1, 1, ''))
    def test_apt_key_add_fail_no_file_name_unicode(self, *args):
        """Verify that bad key encoding gets handled correctly
        """
        self._apt_key_fail_helper()

    def _apt_key_list_success_helper(self, finger, key, human_output=True):
        @mock.patch.object(os, 'listdir', return_value=('/fake/dir/key.gpg',))
        @mock.patch.object(subp, 'subp', return_value=(key, ''))
        def mocked_list(*a):

            keys = cc_apt_configure.apt_key('list', human_output)
            assert finger in keys
        mocked_list()

    def test_apt_key_list_success_human(self):
        """Verify expected key output, human
        """
        self._apt_key_list_success_helper(
            TEST_KEY_FINGERPRINT_HUMAN,
            TEST_KEY_HUMAN)

    def test_apt_key_list_success_machine(self):
        """Verify expected key output, machine
        """
        self._apt_key_list_success_helper(
            TEST_KEY_FINGERPRINT_MACHINE,
            TEST_KEY_MACHINE, human_output=False)

    @mock.patch.object(os, 'listdir', return_value=())
    @mock.patch.object(subp, 'subp', return_value=('', ''))
    def test_apt_key_list_fail_no_keys(self, *args):
        """Ensure falsy output for no keys
        """
        keys = cc_apt_configure.apt_key('list')
        assert not keys

    @mock.patch.object(os, 'listdir', return_value=('file_not_gpg_key.txt'))
    @mock.patch.object(subp, 'subp', return_value=('', ''))
    def test_apt_key_list_fail_no_keys_file(self, *args):
        """Ensure non-gpg file is not returned.

        apt-key used file extensions for this, so we do too
        """
        assert not cc_apt_configure.apt_key('list')

    @mock.patch.object(subp, 'subp', side_effect=subp.ProcessExecutionError)
    @mock.patch.object(os, 'listdir', return_value=('bad_gpg_key.gpg'))
    def test_apt_key_list_fail_bad_key_file(self, *args):
        """Ensure bad gpg key doesn't throw exeption.
        """
        assert not cc_apt_configure.apt_key('list')