import os
import re
import time

import testinfra.utils.ansible_runner


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


def test_website_group(host):
    """
    Tests if website group has been created correctly.
    """

    group = host.group('web-parameters-mandatory')

    assert group.exists
    assert group.gid == 1003


def test_website_admin_user(host):
    """
    Tests if website administrator user has been created correctly.
    """

    user = host.user('admin-parameters-mandatory')

    assert user.exists
    assert user.uid == 1003
    assert user.group == 'web-parameters-mandatory'
    assert user.groups == ['web-parameters-mandatory']
    assert user.shell == '/bin/bash'
    assert user.home == '/var/www/parameters-mandatory'


def test_website_admin_home(host):
    """
    Tests if permissions on website admin home directory are correct.
    """

    home = host.file('/var/www/parameters-mandatory')

    assert home.is_directory
    assert home.user == 'admin-parameters-mandatory'
    assert home.group == 'web-parameters-mandatory'
    assert home.mode == 0o750


def test_home_profile_directory(host):
    """
    Tests if profile directory has been set-up correctly for the website
    administrator/application user.
    """

    with host.sudo():

        directory = host.file('/var/www/parameters-mandatory/.profile.d')
        assert directory.is_directory
        assert directory.user == 'admin-parameters-mandatory'
        assert directory.group == 'web-parameters-mandatory'
        assert directory.mode == 0o750


def test_website_application_user(host):
    """
    Tests if website application user has been created correctly.
    """

    user = host.user('web-parameters-mandatory')

    assert user.exists
    assert user.uid < 1000
    assert user.group == 'web-parameters-mandatory'
    assert user.groups == ['web-parameters-mandatory']
    assert user.shell == '/bin/sh'
    assert user.home == '/var/www/parameters-mandatory'

    with host.sudo():
        umask = host.run("su -l web-parameters-mandatory -c 'bash -c umask'")
        assert umask.stdout == '0007\n'


def test_nginx_user(host):
    """
    Tests if web server user has been added to website group.
    """

    user = host.user('www-data')
    assert 'web-parameters-mandatory' in user.groups


def test_forward_file(host):
    """
    Tests if the forward file has correct permissions and content.
    """

    with host.sudo():

        config = host.file('/var/www/parameters-mandatory/.forward')
        assert config.is_file
        assert config.user == 'root'
        assert config.group == 'web-parameters-mandatory'
        assert config.mode == 0o640
        assert config.content_string == "root\n"


def test_mail_forwarding(host):
    """
    Tests if mail forwarding works as expected.
    """

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

    send = host.run('swaks --suppress-data --to web-parameters-mandatory@localhost')
    assert send.rc == 0
    original_queue_id = re.search('Ok: queued as (.*)', send.stdout).group(1)

    # Sleep for a couple of seconds so the mail can get delivered.
    time.sleep(5)

    with host.sudo():
        mail_log = host.file('/var/log/mail.log')

        # First extract message ID of forwarded mail.
        pattern = r"%s: to=<web-parameters-mandatory@localhost>.*status=sent \(forwarded as ([^)]*)\)" % original_queue_id
        forward_queue_id = re.search(pattern, mail_log.content_string).group(1)

        # Now try to determine where the forward ended-up at.
        pattern = "%s: to=<vagrant@%s>, orig_to=<web-parameters-mandatory@localhost>.*status=sent" % (forward_queue_id, hostname)
        assert re.search(pattern, mail_log.content_string) is not None


def test_php_fpm_configuration_file(host):
    """
    Tests if PHP FPM configuration file has been correctly deployed.
    """

    distribution_release = host.ansible("setup")["ansible_facts"]["ansible_distribution_release"]

    if distribution_release == "stretch":
        config_file_path = '/etc/php/7.0/fpm/pool.d/parameters-mandatory.conf'
    elif distribution_release == "buster":
        config_file_path = '/etc/php/7.3/fpm/pool.d/parameters-mandatory.conf'
    else:
        raise Exception("Tried running test on unsupported distribution: %s" % distribution_release)

    with host.sudo():

        config = host.file(config_file_path)
        assert config.is_file
        assert config.user == 'root'
        assert config.group == 'root'
        assert config.mode == 0o640


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

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


def test_vhost_file(host):
    """
    Tests permissions of vhost configuration file.
    """

    config = host.file('/etc/nginx/sites-available/parameters-mandatory')

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


def test_website_enabled(host):
    """
    Tests if website has been enabled.
    """

    config = host.file('/etc/nginx/sites-enabled/parameters-mandatory')

    assert config.is_symlink
    assert config.linked_to == '/etc/nginx/sites-available/parameters-mandatory'


def test_index_page(host):
    """
    Tests if index page is served correctly.
    """

    page = host.run('curl https://parameters-mandatory/')

    assert page.rc == 0
    assert page.stdout == "This is the index page for parameters-mandatory."