# -*- coding: utf-8 -*-
# (c) 2018, Jordan Borean <jborean@redhat.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import pytest

from io import StringIO

from units.compat.mock import patch, MagicMock
from ansible.errors import AnsibleConnectionFailure
from ansible.module_utils._text import to_bytes
from ansible.playbook.play_context import PlayContext
from ansible.plugins.loader import connection_loader
from ansible.plugins.connection import winrm

pytest.importorskip("winrm")


class TestConnectionWinRM(object):

    OPTIONS_DATA = (
        # default options
        (
            {},
            {'_extras': {}},
            {},
            {
                '_kerb_managed': False,
                '_kinit_cmd': 'kinit',
                '_winrm_connection_timeout': None,
                '_winrm_host': 'inventory_hostname',
                '_winrm_kwargs': {'username': None, 'password': ''},
                '_winrm_pass': '',
                '_winrm_path': '/wsman',
                '_winrm_port': 5986,
                '_winrm_scheme': 'https',
                '_winrm_transport': ['ssl'],
                '_winrm_user': None
            },
            False
        ),
        # http through port
        (
            {},
            {'_extras': {}, 'ansible_port': 5985},
            {},
            {
                '_winrm_kwargs': {'username': None, 'password': ''},
                '_winrm_port': 5985,
                '_winrm_scheme': 'http',
                '_winrm_transport': ['plaintext'],
            },
            False
        ),
        # kerberos user with kerb present
        (
            {},
            {'_extras': {}, 'ansible_user': 'user@domain.com'},
            {},
            {
                '_kerb_managed': False,
                '_kinit_cmd': 'kinit',
                '_winrm_kwargs': {'username': 'user@domain.com',
                                  'password': ''},
                '_winrm_pass': '',
                '_winrm_transport': ['kerberos', 'ssl'],
                '_winrm_user': 'user@domain.com'
            },
            True
        ),
        # kerberos user without kerb present
        (
            {},
            {'_extras': {}, 'ansible_user': 'user@domain.com'},
            {},
            {
                '_kerb_managed': False,
                '_kinit_cmd': 'kinit',
                '_winrm_kwargs': {'username': 'user@domain.com',
                                  'password': ''},
                '_winrm_pass': '',
                '_winrm_transport': ['ssl'],
                '_winrm_user': 'user@domain.com'
            },
            False
        ),
        # kerberos user with managed ticket (implicit)
        (
            {'password': 'pass'},
            {'_extras': {}, 'ansible_user': 'user@domain.com'},
            {},
            {
                '_kerb_managed': True,
                '_kinit_cmd': 'kinit',
                '_winrm_kwargs': {'username': 'user@domain.com',
                                  'password': 'pass'},
                '_winrm_pass': 'pass',
                '_winrm_transport': ['kerberos', 'ssl'],
                '_winrm_user': 'user@domain.com'
            },
            True
        ),
        # kerb with managed ticket (explicit)
        (
            {'password': 'pass'},
            {'_extras': {}, 'ansible_user': 'user@domain.com',
             'ansible_winrm_kinit_mode': 'managed'},
            {},
            {
                '_kerb_managed': True,
            },
            True
        ),
        # kerb with unmanaged ticket (explicit))
        (
            {'password': 'pass'},
            {'_extras': {}, 'ansible_user': 'user@domain.com',
             'ansible_winrm_kinit_mode': 'manual'},
            {},
            {
                '_kerb_managed': False,
            },
            True
        ),
        # transport override (single)
        (
            {},
            {'_extras': {}, 'ansible_user': 'user@domain.com',
             'ansible_winrm_transport': 'ntlm'},
            {},
            {
                '_winrm_kwargs': {'username': 'user@domain.com',
                                  'password': ''},
                '_winrm_pass': '',
                '_winrm_transport': ['ntlm'],
            },
            False
        ),
        # transport override (list)
        (
            {},
            {'_extras': {}, 'ansible_user': 'user@domain.com',
             'ansible_winrm_transport': ['ntlm', 'certificate']},
            {},
            {
                '_winrm_kwargs': {'username': 'user@domain.com',
                                  'password': ''},
                '_winrm_pass': '',
                '_winrm_transport': ['ntlm', 'certificate'],
            },
            False
        ),
        # winrm extras
        (
            {},
            {'_extras': {'ansible_winrm_server_cert_validation': 'ignore',
                         'ansible_winrm_service': 'WSMAN'}},
            {},
            {
                '_winrm_kwargs': {'username': None, 'password': '',
                                  'server_cert_validation': 'ignore',
                                  'service': 'WSMAN'},
            },
            False
        ),
        # direct override
        (
            {},
            {'_extras': {}, 'ansible_winrm_connection_timeout': 5},
            {'connection_timeout': 10},
            {
                '_winrm_connection_timeout': 10,
            },
            False
        ),
        # user comes from option not play context
        (
            {'username': 'user1'},
            {'_extras': {}, 'ansible_user': 'user2'},
            {},
            {
                '_winrm_user': 'user2',
                '_winrm_kwargs': {'username': 'user2', 'password': ''}
            },
            False
        )
    )

    # pylint bug: https://github.com/PyCQA/pylint/issues/511
    # pylint: disable=undefined-variable
    @pytest.mark.parametrize('play, options, direct, expected, kerb',
                             ((p, o, d, e, k) for p, o, d, e, k in OPTIONS_DATA))
    def test_set_options(self, play, options, direct, expected, kerb):
        winrm.HAVE_KERBEROS = kerb

        pc = PlayContext()
        for attr, value in play.items():
            setattr(pc, attr, value)
        new_stdin = StringIO()

        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options=options, direct=direct)
        conn._build_winrm_kwargs()

        for attr, expected in expected.items():
            actual = getattr(conn, attr)
            assert actual == expected, \
                "winrm attr '%s', actual '%s' != expected '%s'"\
                % (attr, actual, expected)


class TestWinRMKerbAuth(object):

    @pytest.mark.parametrize('options, expected', [
        [{"_extras": {}},
         (["kinit", "user@domain"],)],
        [{"_extras": {}, 'ansible_winrm_kinit_cmd': 'kinit2'},
         (["kinit2", "user@domain"],)],
        [{"_extras": {'ansible_winrm_kerberos_delegation': True}},
         (["kinit", "-f", "user@domain"],)],
    ])
    def test_kinit_success_subprocess(self, monkeypatch, options, expected):
        def mock_communicate(input=None, timeout=None):
            return b"", b""

        mock_popen = MagicMock()
        mock_popen.return_value.communicate = mock_communicate
        mock_popen.return_value.returncode = 0
        monkeypatch.setattr("subprocess.Popen", mock_popen)

        winrm.HAS_PEXPECT = False
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options=options)
        conn._build_winrm_kwargs()

        conn._kerb_auth("user@domain", "pass")
        mock_calls = mock_popen.mock_calls
        assert len(mock_calls) == 1
        assert mock_calls[0][1] == expected
        actual_env = mock_calls[0][2]['env']
        assert list(actual_env.keys()) == ['KRB5CCNAME']
        assert actual_env['KRB5CCNAME'].startswith("FILE:/")

    @pytest.mark.parametrize('options, expected', [
        [{"_extras": {}},
         ("kinit", ["user@domain"],)],
        [{"_extras": {}, 'ansible_winrm_kinit_cmd': 'kinit2'},
         ("kinit2", ["user@domain"],)],
        [{"_extras": {'ansible_winrm_kerberos_delegation': True}},
         ("kinit", ["-f", "user@domain"],)],
    ])
    def test_kinit_success_pexpect(self, monkeypatch, options, expected):
        pytest.importorskip("pexpect")
        mock_pexpect = MagicMock()
        mock_pexpect.return_value.exitstatus = 0
        monkeypatch.setattr("pexpect.spawn", mock_pexpect)

        winrm.HAS_PEXPECT = True
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options=options)
        conn._build_winrm_kwargs()

        conn._kerb_auth("user@domain", "pass")
        mock_calls = mock_pexpect.mock_calls
        assert mock_calls[0][1] == expected
        actual_env = mock_calls[0][2]['env']
        assert list(actual_env.keys()) == ['KRB5CCNAME']
        assert actual_env['KRB5CCNAME'].startswith("FILE:/")
        assert mock_calls[0][2]['echo'] is False
        assert mock_calls[1][0] == "().expect"
        assert mock_calls[1][1] == (".*:",)
        assert mock_calls[2][0] == "().sendline"
        assert mock_calls[2][1] == ("pass",)
        assert mock_calls[3][0] == "().read"
        assert mock_calls[4][0] == "().wait"

    def test_kinit_with_missing_executable_subprocess(self, monkeypatch):
        expected_err = "[Errno 2] No such file or directory: " \
                       "'/fake/kinit': '/fake/kinit'"
        mock_popen = MagicMock(side_effect=OSError(expected_err))

        monkeypatch.setattr("subprocess.Popen", mock_popen)

        winrm.HAS_PEXPECT = False
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        options = {"_extras": {}, "ansible_winrm_kinit_cmd": "/fake/kinit"}
        conn.set_options(var_options=options)
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("user@domain", "pass")
        assert str(err.value) == "Kerberos auth failure when calling " \
                                 "kinit cmd '/fake/kinit': %s" % expected_err

    def test_kinit_with_missing_executable_pexpect(self, monkeypatch):
        pexpect = pytest.importorskip("pexpect")

        expected_err = "The command was not found or was not " \
                       "executable: /fake/kinit"
        mock_pexpect = \
            MagicMock(side_effect=pexpect.ExceptionPexpect(expected_err))

        monkeypatch.setattr("pexpect.spawn", mock_pexpect)

        winrm.HAS_PEXPECT = True
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        options = {"_extras": {}, "ansible_winrm_kinit_cmd": "/fake/kinit"}
        conn.set_options(var_options=options)
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("user@domain", "pass")
        assert str(err.value) == "Kerberos auth failure when calling " \
                                 "kinit cmd '/fake/kinit': %s" % expected_err

    def test_kinit_error_subprocess(self, monkeypatch):
        expected_err = "kinit: krb5_parse_name: " \
                       "Configuration file does not specify default realm"

        def mock_communicate(input=None, timeout=None):
            return b"", to_bytes(expected_err)

        mock_popen = MagicMock()
        mock_popen.return_value.communicate = mock_communicate
        mock_popen.return_value.returncode = 1
        monkeypatch.setattr("subprocess.Popen", mock_popen)

        winrm.HAS_PEXPECT = False
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options={"_extras": {}})
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("invaliduser", "pass")

        assert str(err.value) == \
            "Kerberos auth failure for principal invaliduser with " \
            "subprocess: %s" % (expected_err)

    def test_kinit_error_pexpect(self, monkeypatch):
        pytest.importorskip("pexpect")

        expected_err = "Configuration file does not specify default realm"
        mock_pexpect = MagicMock()
        mock_pexpect.return_value.expect = MagicMock(side_effect=OSError)
        mock_pexpect.return_value.read.return_value = to_bytes(expected_err)
        mock_pexpect.return_value.exitstatus = 1

        monkeypatch.setattr("pexpect.spawn", mock_pexpect)

        winrm.HAS_PEXPECT = True
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options={"_extras": {}})
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("invaliduser", "pass")

        assert str(err.value) == \
            "Kerberos auth failure for principal invaliduser with " \
            "pexpect: %s" % (expected_err)

    def test_kinit_error_pass_in_output_subprocess(self, monkeypatch):
        def mock_communicate(input=None, timeout=None):
            return b"", b"Error with kinit\n" + input

        mock_popen = MagicMock()
        mock_popen.return_value.communicate = mock_communicate
        mock_popen.return_value.returncode = 1
        monkeypatch.setattr("subprocess.Popen", mock_popen)

        winrm.HAS_PEXPECT = False
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options={"_extras": {}})
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("username", "password")
        assert str(err.value) == \
            "Kerberos auth failure for principal username with subprocess: " \
            "Error with kinit\n<redacted>"

    def test_kinit_error_pass_in_output_pexpect(self, monkeypatch):
        pytest.importorskip("pexpect")

        mock_pexpect = MagicMock()
        mock_pexpect.return_value.expect = MagicMock()
        mock_pexpect.return_value.read.return_value = \
            b"Error with kinit\npassword\n"
        mock_pexpect.return_value.exitstatus = 1

        monkeypatch.setattr("pexpect.spawn", mock_pexpect)

        winrm.HAS_PEXPECT = True
        pc = PlayContext()
        pc = PlayContext()
        new_stdin = StringIO()
        conn = connection_loader.get('winrm', pc, new_stdin)
        conn.set_options(var_options={"_extras": {}})
        conn._build_winrm_kwargs()

        with pytest.raises(AnsibleConnectionFailure) as err:
            conn._kerb_auth("username", "password")
        assert str(err.value) == \
            "Kerberos auth failure for principal username with pexpect: " \
            "Error with kinit\n<redacted>"
