#
# Copyright (C) 2015  FreeIPA Contributors see COPYING for license
#

"""
Module provides tests which testing ability of various subsystems to be
installed.
"""

from __future__ import absolute_import

import os
import pytest
from ipalib.constants import DOMAIN_LEVEL_0
from ipaplatform.constants import constants
from ipaplatform.paths import paths
from ipatests.pytest_ipa.integration.env_config import get_global_config
from ipatests.test_integration.base import IntegrationTest
from ipatests.pytest_ipa.integration import tasks
from ipatests.test_integration.test_caless import CALessBase, ipa_certs_cleanup

config = get_global_config()


def create_broken_resolv_conf(master):
    # Force a broken resolv.conf to simulate a bad response to
    # reverse zone lookups
    master.run_command([
        '/usr/bin/mv',
        paths.RESOLV_CONF,
        '%s.sav' % paths.RESOLV_CONF
    ])

    contents = "# Set as broken by ipatests\nnameserver 127.0.0.2\n"
    master.put_file_contents(paths.RESOLV_CONF, contents)


def restore_resolv_conf(master):
    if os.path.exists('%s.sav' % paths.RESOLV_CONF):
        master.run_command([
            '/usr/bin/mv',
            '%s.sav' % paths.RESOLV_CONF,
            paths.RESOLV_CONF
        ])


def server_install_setup(func):
    def wrapped(*args):
        master = args[0].master
        create_broken_resolv_conf(master)
        try:
            func(*args)
        finally:
            tasks.uninstall_master(master, clean=False)
            restore_resolv_conf(master)
            ipa_certs_cleanup(master)
    return wrapped


class InstallTestBase1(IntegrationTest):

    num_replicas = 3
    topology = 'star'

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False)

    def test_replica0_ca_less_install(self):
        tasks.install_replica(self.master, self.replicas[0], setup_ca=False)

    def test_replica0_ipa_ca_install(self):
        tasks.install_ca(self.replicas[0])

    def test_replica0_ipa_kra_install(self):
        tasks.install_kra(self.replicas[0], first_instance=True)

    def test_replica0_ipa_dns_install(self):
        tasks.install_dns(self.replicas[0])

    def test_replica1_with_ca_install(self):
        tasks.install_replica(self.master, self.replicas[1], setup_ca=True)

    def test_replica1_ipa_kra_install(self):
        tasks.install_kra(self.replicas[1])

    def test_replica1_ipa_dns_install(self):
        tasks.install_dns(self.replicas[1])

    def test_replica2_with_ca_kra_install(self):
        tasks.install_replica(self.master, self.replicas[2], setup_ca=True,
                              setup_kra=True)

    def test_replica2_ipa_dns_install(self):
        tasks.install_dns(self.replicas[2])


class InstallTestBase2(IntegrationTest):

    num_replicas = 3
    topology = 'star'

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False)

    def test_replica0_with_ca_kra_dns_install(self):
        tasks.install_replica(self.master, self.replicas[0], setup_ca=True,
                              setup_kra=True, setup_dns=True)

    def test_replica1_with_ca_dns_install(self):
        tasks.install_replica(self.master, self.replicas[1], setup_ca=True,
                              setup_dns=True)

    def test_replica1_ipa_kra_install(self):
        tasks.install_kra(self.replicas[1])

    def test_replica2_with_dns_install(self):
        tasks.install_replica(self.master, self.replicas[2], setup_ca=False,
                              setup_dns=True)

    def test_replica2_ipa_ca_install(self):
        tasks.install_ca(self.replicas[2])

    def test_replica2_ipa_kra_install(self):
        tasks.install_kra(self.replicas[2])


class ADTrustInstallTestBase(IntegrationTest):
    """
    Base test for builtin AD trust installation im combination with other
    components
    """
    num_replicas = 2
    topology = 'star'

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False)

    def install_replica(self, replica, **kwargs):
        tasks.install_replica(self.master, replica, setup_adtrust=True,
                              **kwargs)

    def test_replica0_only_adtrust(self):
        self.install_replica(self.replicas[0], setup_ca=False)

    def test_replica1_all_components_adtrust(self):
        self.install_replica(self.replicas[1], setup_ca=True)


##
# Master X Replicas installation tests
##

class TestInstallWithCA1(InstallTestBase1):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False)

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica1_ipa_kra_install(self):
        super(TestInstallWithCA1, self).test_replica1_ipa_kra_install()

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_with_ca_kra_install(self):
        super(TestInstallWithCA1, self).test_replica2_with_ca_kra_install()

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_ipa_dns_install(self):
        super(TestInstallWithCA1, self).test_replica2_ipa_dns_install()

    def test_install_with_bad_ldap_conf(self):
        """
        Test a client install with a non standard ldap.config
        https://pagure.io/freeipa/issue/7418
        """
        ldap_conf = paths.OPENLDAP_LDAP_CONF
        base_dn = self.master.domain.basedn  # pylint: disable=no-member
        client = self.replicas[0]
        tasks.uninstall_master(client)
        expected_msg1 = "contains deprecated and unsupported " \
                        "entries: HOST, PORT"
        file_backup = client.get_file_contents(ldap_conf, encoding='utf-8')
        constants = "URI ldaps://{}\nBASE {}\nHOST {}\nPORT 636".format(
            self.master.hostname, base_dn,
            self.master.hostname)
        modifications = "{}\n{}".format(file_backup, constants)
        client.put_file_contents(paths.OPENLDAP_LDAP_CONF, modifications)
        result = client.run_command(['ipa-client-install', '-U',
                                     '--domain', client.domain.name,
                                     '--realm', client.domain.realm,
                                     '-p', client.config.admin_name,
                                     '-w', client.config.admin_password,
                                     '--server', self.master.hostname],
                                    raiseonerr=False)
        assert expected_msg1 in result.stderr_text
        client.put_file_contents(ldap_conf, file_backup)


class TestInstallWithCA2(InstallTestBase2):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False)

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica0_with_ca_kra_dns_install(self):
        super(TestInstallWithCA2, self).test_replica0_with_ca_kra_dns_install()

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica1_ipa_kra_install(self):
        super(TestInstallWithCA2, self).test_replica1_ipa_kra_install()

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_ipa_kra_install(self):
        super(TestInstallWithCA2, self).test_replica2_ipa_kra_install()


class TestInstallWithCA_KRA1(InstallTestBase1):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False, setup_kra=True)

    def test_replica0_ipa_kra_install(self):
        tasks.install_kra(self.replicas[0], first_instance=False)


class TestInstallWithCA_KRA2(InstallTestBase2):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=False, setup_kra=True)


class TestInstallWithCA_DNS1(InstallTestBase1):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=True)

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica1_ipa_kra_install(self):
        super(TestInstallWithCA_DNS1, self).test_replica1_ipa_kra_install()

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_with_ca_kra_install(self):
        super(TestInstallWithCA_DNS1, self).test_replica2_with_ca_kra_install()

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_ipa_dns_install(self):
        super(TestInstallWithCA_DNS1, self).test_replica2_ipa_dns_install()


class TestInstallWithCA_DNS2(InstallTestBase2):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=True)

    @pytest.mark.xfail(reason="FreeIPA ticket 7008", strict=True)
    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica0_with_ca_kra_dns_install(self):
        super(
            TestInstallWithCA_DNS2, self
        ).test_replica0_with_ca_kra_dns_install()

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica1_ipa_kra_install(self):
        super(TestInstallWithCA_DNS2, self).test_replica1_ipa_kra_install()

    @pytest.mark.skipif(config.domain_level == DOMAIN_LEVEL_0,
                        reason='does not work on DOMAIN_LEVEL_0 by design')
    def test_replica2_ipa_kra_install(self):
        super(TestInstallWithCA_DNS2, self).test_replica2_ipa_kra_install()


class TestInstallWithCA_DNS3(CALessBase):
    """
    Test an install with a bad DNS resolver configured to force a
    timeout trying to verify the existing zones. In the case of a reverse
    zone it is skipped unless --allow-zone-overlap is set regardless of
    the value of --auto-reverse. Confirm that --allow-zone-overlap
    lets the reverse zone be created.

    ticket 7239
    """

    @server_install_setup
    def test_number_of_zones(self):
        """There should be two zones: one forward, one reverse"""

        self.create_pkcs12('ca1/server')
        self.prepare_cacert('ca1')

        self.install_server(extra_args=['--allow-zone-overlap'])

        result = self.master.run_command([
            'ipa', 'dnszone-find'])

        assert "in-addr.arpa." in result.stdout_text

        assert "returned 2" in result.stdout_text


class TestInstallWithCA_DNS4(CALessBase):
    """
    Test an install with a bad DNS resolver configured to force a
    timeout trying to verify the existing zones. In the case of a reverse
    zone it is skipped unless --allow-zone-overlap is set regardless of
    the value of --auto-reverse. Confirm that without --allow-reverse-zone
    only the forward zone is created.

    ticket 7239
    """

    @server_install_setup
    def test_number_of_zones(self):
        """There should be one zone, a forward because rev timed-out"""

        self.create_pkcs12('ca1/server')
        self.prepare_cacert('ca1')

        # no zone overlap by default
        self.install_server()

        result = self.master.run_command([
            'ipa', 'dnszone-find'])

        assert "in-addr.arpa." not in result.stdout_text

        assert "returned 1" in result.stdout_text


@pytest.mark.cs_acceptance
class TestInstallWithCA_KRA_DNS1(InstallTestBase1):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=True, setup_kra=True)

    def test_replica0_ipa_kra_install(self):
        tasks.install_kra(self.replicas[0], first_instance=False)


class TestInstallWithCA_KRA_DNS2(InstallTestBase2):

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=True, setup_kra=True)


class TestADTrustInstall(ADTrustInstallTestBase):
    """
    Tests built-in AD trust installation in various combinations (see the base
    class for more details) against plain IPA master (no DNS, no KRA, no AD
    trust)
    """


class TestADTrustInstallWithDNS_KRA_ADTrust(ADTrustInstallTestBase):
    """
    Tests built-in AD trust installation in various combinations (see the base
    class for more details) against fully equipped (DNS, CA, KRA, ADtrust)
    master. Additional two test cases were added to test interplay including
    KRA installer
    """

    @classmethod
    def install(cls, mh):
        tasks.install_master(cls.master, setup_dns=True, setup_kra=True,
                             setup_adtrust=True)

    def test_replica1_all_components_adtrust(self):
        self.install_replica(self.replicas[1], setup_ca=True, setup_kra=True)


##
# Rest of master installation tests
##

class TestInstallMaster(IntegrationTest):

    num_replicas = 0

    @classmethod
    def install(cls, mh):
        pass

    def test_install_master(self):
        tasks.install_master(self.master, setup_dns=False)

    def test_install_kra(self):
        tasks.install_kra(self.master, first_instance=True)

    def test_install_dns(self):
        tasks.install_dns(self.master)

    def test_WSGI_worker_process(self):
        """ Test if WSGI worker process count is set to 4

        related ticket : https://pagure.io/freeipa/issue/7587
        """
        # check process count in httpd conf file i.e expected string
        exp = b'WSGIDaemonProcess ipa processes=%d' % constants.WSGI_PROCESSES
        httpd_conf = self.master.get_file_contents(paths.HTTPD_IPA_CONF)
        assert exp in httpd_conf

        # check the process count
        cmd = self.master.run_command('ps -eF')
        wsgi_count = cmd.stdout_text.count('wsgi:ipa')
        assert constants.WSGI_PROCESSES == wsgi_count


class TestInstallMasterKRA(IntegrationTest):

    num_replicas = 0

    @classmethod
    def install(cls, mh):
        pass

    def test_install_master(self):
        tasks.install_master(self.master, setup_dns=False, setup_kra=True)

    def test_install_dns(self):
        tasks.install_dns(self.master)


class TestInstallMasterDNS(IntegrationTest):

    num_replicas = 0

    @classmethod
    def install(cls, mh):
        pass

    def test_install_master(self):
        tasks.install_master(
            self.master,
            setup_dns=True,
            extra_args=['--zonemgr', 'me@example.org'],
        )

    def test_install_kra(self):
        tasks.install_kra(self.master, first_instance=True)


class TestInstallMasterReservedIPasForwarder(IntegrationTest):
    """Test to check if IANA reserved IP doesn't accepted as DNS forwarder

    IANA reserved IP address can not be used as a forwarder.
    This test checks if ipa server installation throws an error when
    0.0.0.0 is specified as forwarder IP address.

    related ticket: https://pagure.io/freeipa/issue/6894
    """

    def test_reserved_ip_as_forwarder(self):
        args = [
            'ipa-server-install',
            '-n', self.master.domain.name,
            '-r', self.master.domain.realm,
            '-p', self.master.config.dirman_password,
            '-a', self.master.config.admin_password,
            '--setup-dns',
            '--forwarder', '0.0.0.0',
            '--auto-reverse']
        cmd = self.master.run_command(args, raiseonerr=False)
        assert cmd.returncode == 2
        exp_str = ("error: option --forwarder: invalid IP address 0.0.0.0: "
                   "cannot use IANA reserved IP address 0.0.0.0")
        assert exp_str in cmd.stderr_text

        server_install_options = (
                "yes\n"
                "{hostname}\n"
                "{dmname}\n\n"
                "{dm_pass}\n{dm_pass}"
                "\n{admin_pass}\n{admin_pass}\n"
                "yes\nyes\n0.0.0.0\n".format(
                    dm_pass=self.master.config.dirman_password,
                    admin_pass=self.master.config.admin_password,
                    dmname=self.master.domain.name,
                    hostname=self.master.hostname))

        cmd = self.master.run_command(['ipa-server-install'],
                                      stdin_text=server_install_options,
                                      raiseonerr=False)
        exp_str = ("Invalid IP Address 0.0.0.0: cannot use IANA reserved "
                   "IP address 0.0.0.0")
        assert exp_str in cmd.stdout_text