from collections import namedtuple

import pytest


@pytest.fixture
def php_info(host):
    """
    Helper fixture used to define what the expected PHP-FPM package
    name, PHP-FPM service name, and PHP base configuration directory
    is based on Debian release.

    Currently supports Debian 9 (Stretch).

    Resulting information can be accessed through returned named tuple
    with the following properties:

    - fpm_package (name of the PHP-FPM package)
    - fpm_service (name of the PHP-FPM system service)
    - base_config_dir (base configuration directory for PHP)
    """

    PHPInfo = namedtuple('PHPInfo', 'fpm_package fpm_service base_config_dir')

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

    if ansible_distribution_release == 'stretch':
        info = PHPInfo(fpm_package='php-fpm', fpm_service='php7.0-fpm', base_config_dir='/etc/php/7.0')
    else:
        raise Exception('The php_info pytest fixture does not support Debian release: %s' % ansible_distribution_release)

    return info