import os

import testinfra.utils.ansible_runner


testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('parameters-*')


def test_installed_packages(host):
    """
    Tests if all the necessary supporting packages have been
    installed.
    """

    assert host.package('lua-ldap').is_installed
    assert host.package('prosody-modules').is_installed
    assert host.package('prosody').is_installed


def test_prosody_user(host):
    """
    Tests if Prosody user has been set-up correctly to access TLS material.
    """

    assert 'ssl-cert' in host.user('prosody').groups


def test_prosody_configuration_file(host):
    """
    Tests if Prosody configuration file has correct permissions.
    """

    with host.sudo():

        config = host.file('/etc/prosody/prosody.cfg.lua')

        assert config.is_file
        assert config.user == 'root'
        assert config.group == 'prosody'
        assert config.mode == 0o640


def test_services(host):
    """
    Tests if services are enabled and running.
    """

    service = host.service('prosody')

    assert service.is_enabled
    assert service.is_running


def test_firewall_configuration_file(host):
    """
    Tests if firewall configuration file has been deployed correctly.
    """

    with host.sudo():

        config = host.file('/etc/ferm/conf.d/30-xmpp.conf')

        assert config.is_file
        assert config.user == 'root'
        assert config.group == 'root'
        assert config.mode == 0o640


def test_xmpp_server_dh_parameters_file(host):
    """
    Tests if the Diffie-Hellman parameter file has been generated
    correctly.
    """

    fqdn = host.run('hostname -f').stdout.strip()
    dhparam_file_path = '/etc/ssl/private/%s_xmpp.dh.pem' % fqdn

    with host.sudo():
        dhparam_file = host.file(dhparam_file_path)
        assert dhparam_file.is_file
        assert dhparam_file.user == 'root'
        assert dhparam_file.group == 'prosody'
        assert dhparam_file.mode == 0o640

        dhparam_info = host.run("openssl dhparam -noout -text -in %s", dhparam_file_path)

        assert "DH Parameters: (2048 bit)" in dhparam_info.stdout


def test_prosody_tls_files(host):
    """
    Tests if Prosody TLS private key and certificage have been deployed
    correctly.
    """

    hostname = host.run('hostname -f').stdout.strip()

    with host.sudo():

        tls_file = host.file('/etc/ssl/private/%s_xmpp.key' % hostname)
        assert tls_file.is_file
        assert tls_file.user == 'root'
        assert tls_file.group == 'prosody'
        assert tls_file.mode == 0o640
        assert tls_file.content_string == open("tests/data/x509/server/%s_xmpp.key.pem" % hostname, "r").read().rstrip()

        tls_file = host.file('/etc/ssl/certs/%s_xmpp.pem' % hostname)
        assert tls_file.is_file
        assert tls_file.user == 'root'
        assert tls_file.group == 'root'
        assert tls_file.mode == 0o644
        assert tls_file.content_string == open("tests/data/x509/server/%s_xmpp.cert.pem" % hostname, "r").read().rstrip()


def test_certificate_validity_check_configuration(host):
    """
    Tests if certificate validity check configuration file has been deployed
    correctly.
    """

    hostname = host.run('hostname').stdout.strip()

    config = host.file('/etc/check_certificate/%s_xmpp.conf' % hostname)
    assert config.is_file
    assert config.user == 'root'
    assert config.group == 'root'
    assert config.mode == 0o644
    assert config.content_string == "/etc/ssl/certs/%s_xmpp.pem" % hostname


def test_xmpp_server_uses_correct_dh_parameters(host):
    """
    Tests if the HTTP server uses the generated Diffie-Hellman parameter.
    """

    fqdn = host.run('hostname -f').stdout.strip()

    # Use first defined domain for testing.
    domain = host.ansible.get_variables()['xmpp_domains'][0]

    with host.sudo():
        expected_dhparam = host.file('/etc/ssl/private/%s_xmpp.dh.pem' % fqdn).content_string.rstrip()

    connection = host.run("gnutls-cli --no-ca-verification --starttls-proto=xmpp --port 5222 "
                          "--priority 'NONE:+VERS-TLS1.2:+CTYPE-X509:+COMP-NULL:+SIGN-RSA-SHA384:+DHE-RSA:+SHA384:+AEAD:+AES-256-GCM' --verbose %s", domain)

    output = connection.stdout
    begin_marker = "-----BEGIN DH PARAMETERS-----"
    end_marker = "-----END DH PARAMETERS-----"
    used_dhparam = output[output.find(begin_marker):output.find(end_marker) + len(end_marker)]

    assert used_dhparam == expected_dhparam


def test_tls_connectivity(host):
    """
    Tests if it is possible to connect to the XMPP server using
    STARTTLS/TLS.
    """

    # Use first defined domain for testing.
    domain = host.ansible.get_variables()['xmpp_domains'][0]

    starttls = host.run('echo "test" | openssl s_client -quiet -starttls xmpp -xmpphost %s -connect localhost:5222', domain)
    assert starttls.rc == 0
    assert 'jabber:client' in starttls.stdout
    assert 'not-well-formed' in starttls.stdout

    tls = host.run('echo "test" | openssl s_client -quiet -connect %s:5223', domain)
    assert tls.rc == 0
    assert 'jabber:client' in starttls.stdout
    assert 'not-well-formed' in starttls.stdout

    s2s = host.run('echo "test" | openssl s_client -quiet -starttls xmpp-server -xmpphost %s -connect localhost:5222', domain)
    assert s2s.rc == 0
    assert 'jabber:client' in s2s.stdout
    assert 'not-well-formed' in s2s.stdout


def test_prosody_configuration_validity(host):
    """
    Tests the Prosody configuration file using the 'prosodyctl check'
    command.
    """

    with host.sudo():
        check_config = host.run("prosodyctl check config")

    assert check_config.rc == 0, check_config.stdout


def test_enabled_modules(host):
    """
    Tests if correct modules have been enabled.
    """

    expected_modules = [
        "admin_adhoc",
        "announce",
        "blocklist",
        "carbons",
        "dialback",
        "disco",
        "legacyauth",
        "mam",
        "pep",
        "ping",
        "posix",
        "private",
        "register",
        "roster",
        "saslauth",
        "time",
        "tls",
        "uptime",
        "vcard",
        "version",
    ]

    with host.sudo():
        module_list_command = host.run("/usr/local/bin/list_prosody_modules.lua")

    enabled_modules = sorted(module_list_command.stdout.strip().splitlines())

    assert enabled_modules == expected_modules


def test_certificate_configuration(host):
    """
    Tests if certificates have been issued and configured correctly
    for use with Prosody. Relies on Prosody's own internal check
    command.
    """

    with host.sudo():
        check_certs = host.run("prosodyctl check certs")

    assert check_certs.rc == 0, check_certs.stdout


def test_prosody_certificate_checker_script(host):
    """
    Tests if Prosody certificate checker script has been correctly
    deployed.
    """

    with host.sudo():
        script = host.file("/usr/local/bin/check_prosody_certificate.sh")

        assert script.is_file
        assert script.user == 'root'
        assert script.group == 'root'
        assert script.mode == 0o755


def test_prosody_certificate_checker_crontab(host):
    """
    Tests if crontab entry has been deployed for running the Prosody
    certificate checker script.
    """

    crontab = host.file('/etc/cron.d/check_prosody_certificate')

    assert crontab.is_file
    assert crontab.user == 'root'
    assert crontab.group == 'root'
    assert crontab.mode == 0o644
    assert "MAILTO=root" in crontab.content_string
    assert "/usr/local/bin/check_prosody_certificate.sh" in crontab.content_string


def test_backports_repository(host):
    """
    Tests if the backports repository has been configured.
    """

    repository = host.file("/etc/apt/sources.list.d/backports.list")

    distribution_release = host.ansible("setup")["ansible_facts"]["ansible_distribution_release"]
    expected_content = "deb http://deb.debian.org/debian %s-backports main" % distribution_release

    assert repository.is_file
    assert repository.user == "root"
    assert repository.group == "root"
    assert repository.mode == 0o644
    assert repository.content_string.rstrip() == expected_content


def test_ldap_client_configuration(host):
    """
    Tests if LDAP client configuration is correctly deployed with the
    necessary trust anchor configuration.
    """

    with host.sudo():
        ldaprc = host.file("/var/lib/prosody/.ldaprc")

        assert ldaprc.is_file
        assert ldaprc.user == "root"
        assert ldaprc.group == "prosody"
        assert ldaprc.mode == 0o640
        assert "TLS_CACERT /etc/ssl/certs/ca-certificates.crt" in ldaprc.content_string


# @TODO: Tests which were not implemented due to lack of out-of-box tools:
#
# - Proxy capability.
# - MUC.
# - Server administration through XMPP.