# -*- coding: utf-8 -*-
"""
CloudLinux API for DirectAdmin control panel
"""

import glob
import os
import re
import subprocess
import sys
import syslog
from traceback import format_exc
from typing import Dict, List, Tuple  # NOQA
from urllib.parse import urlparse

import requests

from clcommon.clconfpars import (
    WebConfigMissing,
    WebConfigParsingError,
    apache_conf_parser,
    load_fast,
    nginx_conf_parser,
    read_unicode_file_with_decode_fallback,
)
from clcommon.clconfpars import load as loadconfig
from clcommon.clpwd import ClPwd
from clcommon.cpapi.cpapicustombin import (
    _docroot_under_user_via_custom_bin,
    get_domains_via_custom_binary,
)
from clcommon.cpapi.cpapiexceptions import (
    CpApiTypeError,
    NoDBAccessData,
    NoDomain,
    NoPanelUser,
    ParsingError,
    ReadFileError,
)
from clcommon.cpapi.GeneralPanel import (
    DomainDescription,
    GeneralPanelPluginV1,
    PHPDescription,
)
from clcommon.cpapi.plugins.universal import (
    get_admin_email as universal_get_admin_email,
)
from clcommon.features import Feature
from clcommon.utils import (
    ExternalProgramFailed,
    find_module_param_in_config,
    get_file_lines,
    grep,
)

__cpname__ = 'DirectAdmin'


DA_DIR = '/usr/local/directadmin'
DA_CONF = os.path.join(DA_DIR, 'conf/directadmin.conf')
DA_DATA_DIR = os.path.join(DA_DIR, 'data')
DA_DB_CONF = os.path.join(DA_DIR, 'conf/mysql.conf')
DA_USERS_PATH = os.path.join(DA_DATA_DIR, 'users')
DA_OPT_PATH = os.path.join(DA_DIR, 'custombuild', 'options.conf')
USER_CONF = 'user.conf'
DOMAINOWNERS = '/etc/virtual/domainowners'
ADMIN_DIR = os.path.join(DA_DATA_DIR, 'admin')
RESELLERS_LIST = os.path.join(ADMIN_DIR, 'reseller.list')
ADMINS_LIST = os.path.join(ADMIN_DIR, 'admin.list')
USER_PATTERN = re.compile(rf'.+/(.+)/{re.escape(USER_CONF)}')


# WARN: Probably will be deprecated for our "official" plugins.
# See pluginlib.detect_panel_fast()
def detect():
    return os.path.isfile('/usr/local/directadmin/directadmin') or \
           os.path.isfile('/usr/local/directadmin/custombuild/build')


def db_access():
    access = {}
    try:
        login_data = loadconfig(DA_DB_CONF)
        access['login'] = login_data['user']
        access['pass'] = login_data['passwd']
    except IOError as err:
        raise NoDBAccessData(
            'Can not open file with data to database access; ' + str(err)
        ) from err
    except KeyError as err:
        raise NoDBAccessData(
            f'Can not get database access data from file {DA_DB_CONF}'
        ) from err
    return access


def cpusers():
    match_list = [USER_PATTERN.match(path) for path in glob.glob(os.path.join(DA_USERS_PATH, '*', USER_CONF))]
    users_list = [match.group(1) for match in match_list if match]
    return tuple(users_list)


def resellers():
    with open(RESELLERS_LIST, encoding='utf-8') as f:
        resellers_list = [line.strip() for line in f]
    return tuple(resellers_list)


def admins():
    with open(ADMINS_LIST, encoding='utf-8') as f:
        admins_list = [line.strip() for line in f]
    return set(admins_list)


def dblogin_cplogin_pairs(cplogin_lst=None, with_system_users=False):
    from clcommon.cpapi.plugins.universal import _dblogin_cplogin_pairs  # pylint: disable=import-outside-toplevel
    access = db_access()
    data = _dblogin_cplogin_pairs(cplogin_lst=cplogin_lst, access=access)
    if with_system_users:
        data += tuple(get_da_user(DA_USERS_PATH).items())
    return data


def get_da_user(path, quiet=True):
    users = {}
    cur_dir = os.getcwd()
    os.chdir(path)
    dir_list = glob.glob('./*')

    for user_dir in dir_list:
        if os.path.isdir(user_dir):
            file_domains = path + '/' + user_dir + '/domains.list'
            try:
                with open(file_domains, encoding='utf-8') as f:
                    if len(f.readline()) > 0:
                        user_name = user_dir[2:]
                        users[user_name] = user_name
            except IOError:
                if not quiet:
                    sys.stderr.write("No file " + file_domains)
    os.chdir(cur_dir)
    return users


def cpinfo(cpuser=None, keyls=('cplogin', 'package', 'mail', 'reseller', 'dns', 'locale'), search_sys_users=True):
    returned = []
    if isinstance(cpuser, str):
        cpusers_list = [cpuser]
    elif isinstance(cpuser, (list, tuple)):
        cpusers_list = tuple(cpuser)
    elif cpuser is None:
        cpusers_list = cpusers()
    else:
        raise CpApiTypeError(funcname='cpinfo', supportedtypes='str|unicode|list|tuple',
                             received_type=type(cpuser).__name__)

    def _get_reseller(config):
        if config.get('usertype') == 'reseller':
            return config.get('username')
        return config.get('creator')

    _user_conf_map = {'cplogin': lambda config: config.get('username'),
                      'package': lambda config: config.get('package'),
                      'mail': lambda config: config.get('email'),
                      'reseller': lambda config: _get_reseller(config),
                      'dns': lambda config: config.get('domain'),
                      'locale': lambda config: config.get('language')}
    keyls_ = [_user_conf_map[key] for key in keyls]
    for username in cpusers_list:
        user_conf_file = os.path.join(DA_USERS_PATH, username, USER_CONF)
        if os.path.exists(user_conf_file):
            user_config = load_fast(user_conf_file)
            returned.append([key(user_config) for key in keyls_])
    return returned


def _docroot_under_root(domain):
    # type: (str) -> Tuple[str, str]
    """
    Old method for getting doc_root for domain under root
    Method reads DA config
    :return: (doc_root, username) cortege
    """

    user_name = None
    # Load /etc/virtual/domainowners
    _domain_to_user_map = _load_domains_owners()
    # Find supposed owner of domain
    for main_domain in list(_domain_to_user_map.keys()):
        if domain == main_domain or domain.endswith(f'.{main_domain}'):
            # Parent domain found
            user_name = _domain_to_user_map[main_domain]
            break
    if user_name is None:
        domains_list = []
    else:
        domains_list = userdomains(user_name)
    for d in domains_list:
        if domain in d:
            return d[1], user_name


def _docroot_under_user_old_mechanism(domain):
    # type: (str) -> Tuple[str, str]
    """
    Old method for getting doc_root for domain under user
    Method parses /home/<username>/domains directory
    :return: (doc_root, username) cortege
    """

    clpwd = ClPwd()
    user_pw = clpwd.get_pw_by_uid(os.getuid())[0]
    list_domains_and_doc_roots = _get_domains_list_as_user(user_pw.pw_dir)
    for domain_data in list_domains_and_doc_roots:
        if domain_data['server_name'] == domain:
            return domain_data['document_root'], user_pw.pw_name


def docroot(domain):
    # type: (str) -> Tuple[str, str]
    """
    Retrieves document root for domain
    :param domain: Domain to determine doc_root
    :return: Cortege: (doc_root, domain_user)
    """
    res = None
    domain = domain.strip()

    uid = os.getuid()
    euid = os.geteuid()
    if euid == 0 and uid == 0:
        res = _docroot_under_root(domain)
    else:
        res = _docroot_under_user_via_custom_bin(domain)

    # If there was successful result, res object will have
    # (doc_root, domain_user) format. If there wasn't found any correct
    # doc_roots, res will be None.
    if res is not None:
        return res
    raise NoDomain(f"Can't obtain document root for domain '{domain}'")


def _is_nginx_installed():
    """
    Check if nginx is installed via custombuild;
    """
    config = loadconfig(DA_CONF)
    return bool(int(config.get('nginx', 0)) or int(config.get('nginx_proxy', 0)))


def _get_domains_list_as_root(user_path):
    """
    Get domains list for user from httpd or nginx config as root
    :param user_path: path to DA directory of user's profile
    :return: parsed httpd or nginx config
    :rtype: list
    """

    try:
        if _is_nginx_installed():
            httpd_conf = nginx_conf_parser(os.path.join(user_path, 'nginx.conf'))
        else:
            httpd_conf = apache_conf_parser(os.path.join(user_path, 'httpd.conf'))
    except WebConfigParsingError as e:
        raise ParsingError(e.message) from e
    except WebConfigMissing:
        return []

    return httpd_conf


def _get_domains_list_as_user(user_home):
    # type: (str) -> List[Dict[str, str, bool]]
    """
    Get domains list for user from ~/domains directory as user.
    Method DOESN'T search subdomains, because it's almost impossible detect by user's
    folders without privileges escalation
    :param user_home: path to user home
    :return: list of dictionaries {'server_name': 'domain', 'document_root': 'doc_root', 'ssl': False}
    """

    domains_dir = 'domains'
    doc_root_dir = 'public_html'

    domains_list = []
    domains_path = os.path.join(user_home, domains_dir)
    # Searching main domains
    # All directories of main domains are saved in ~/domains directory
    for domain_dir in os.listdir(domains_path):
        domain_path = os.path.join(domains_path, domain_dir)
        doc_root_path = os.path.join(domains_path, domain_dir, doc_root_dir)
        if os.path.isdir(domain_path) and os.path.isdir(doc_root_path):
            domains_list.append({
                    'server_name': domain_dir,
                    'document_root': doc_root_path,
                    'ssl': False,
            })
        else:
            continue

    return domains_list


def userdomains(cpuser, as_root=False):
    # type: (str, bool) -> List[Tuple[str, str]]
    """
    Get user's domains list
    :return list: domain names
        Example:
        [('cltest1.com', '/home/cltest1/domains/cltest1.com/public_html'),
         ('mk.cltest1.com', '/home/cltest1/domains/cltest1.com/public_html/mk'),
         ('cltest11.com', '/home/cltest1/domains/cltest11.com/public_html')
         ]
    """
    domains_list = []
    user_path = os.path.join(DA_USERS_PATH, cpuser)
    euid = os.geteuid()

    # old method to get list of user's domains
    main_domain_path = ''
    if not os.path.exists(user_path):
        return []

    user_home = os.path.expanduser('~' + cpuser)
    public_path = os.path.join(user_home, 'public_html')
    if os.path.exists(public_path) and os.path.islink(public_path):
        main_domain_path = os.path.realpath(public_path)
    if euid == 0 or as_root:
        httpd_conf = _get_domains_list_as_root(user_path)
        for domain in httpd_conf:
            if domain['ssl'] is True:
                continue
            # Put main domain in start of list
            if domain['server_name'] in main_domain_path:
                domains_list.insert(0, (domain['server_name'], domain['document_root']))
            else:
                domains_list.append((domain['server_name'], domain['document_root']))
        return domains_list

    # this case works the same as above but through the rights escalation binary wrapper
    # call path: here -> binary -> python(diradmin euid) -> userdomains(as_root=True) -> print json result to stdout
    rc, res = get_domains_via_custom_binary()
    if rc == 0:
        return res
    elif rc == 11:
        raise NoPanelUser(f'User {cpuser} not found in the database')
    else:
        raise ExternalProgramFailed(f'Failed to get userdomains: {res}')


def homedirs():
    """
    Detects and returns list of folders contained the home dirs of users of the DirectAdmin
    :return: list of folders, which are parent of home dirs of users of the panel
    """
    home_dirs = set()
    clpwd = ClPwd()
    users_dict = clpwd.get_user_dict()

    for user_name, pw_user in list(users_dict.items()):
        conf_file = os.path.join(DA_USERS_PATH, user_name, USER_CONF)
        if os.path.exists(conf_file):
            home_dir = os.path.dirname(pw_user.pw_dir)
            home_dirs.add(home_dir)
    return list(home_dirs)


def domain_owner(domain):
    """
    Return domain's owner
    :param domain: Domain/sub-domain/add-domain name
    :return: user name or None if domain not found
    """
    return _load_domains_owners().get(domain, None)


@GeneralPanelPluginV1.cache_call(panel_parker=[DOMAINOWNERS])
def _load_domains_owners() -> Dict[str, str]:
    """
    Get domain<->user map from /etc/virtual/domainowners file
    """
    # 1. Load DA data file
    try:
        domains_lines = read_unicode_file_with_decode_fallback(DOMAINOWNERS).splitlines()
    except (OSError, IOError) as e:
        raise ReadFileError(str(e)) from e

    # 2. File loaded successfully, parse data and fill dictionaries
    _domain_to_user_map = {}
    for line_ in domains_lines:
        line_ = line_.strip()
        # pass empty line
        if not line_:
            continue
        domain_, user_ = line_.split(':')
        domain_ = domain_.strip()
        user_ = user_.strip()
        # Fill domain to user map
        _domain_to_user_map[domain_] = user_
    return _domain_to_user_map


def reseller_users(resellername):
    """
    Return list of reseller users
    :param resellername: reseller name; return empty list if None
    :return list[str]: user names list
    """
    if resellername is None:
        return []

    all_users_dict = ClPwd().get_user_dict()

    users_list_file = os.path.join(DA_USERS_PATH, resellername, 'users.list')
    try:
        with open(users_list_file, encoding='utf-8') as users_list:
            users_list = [item.strip() for item in users_list]
            users_list.append(resellername)
            # performing intersection to avoid returning non-existing users
            # that are still present in config file for some reason
            return list(set(all_users_dict) & set(users_list))
    except (IOError, OSError):
        return []


def reseller_domains(resellername=None):
    """
    Get pairs user <=> domain for given reseller;
    Empty list if cannot get or no users found;
    :type resellername: str
    :return list[tuple[str, str]]: tuple[username, main_domain]
    """
    if resellername is None:
        return []
    users = reseller_users(resellername)
    return dict(cpinfo(users, keyls=('cplogin', 'dns')))


def get_admin_email():
    admin_user_file = os.path.join(DA_USERS_PATH, 'admin', USER_CONF)
    cnf = loadconfig(admin_user_file)
    return cnf.get('email', universal_get_admin_email())


def is_reseller(username):
    """
    Check if given user is reseller;
    :type username: str
    :rtype: bool
    :raise: ParsingError, ReadFileError
    """
    user_config = os.path.join(DA_USERS_PATH, username, USER_CONF)
    if os.path.exists(user_config):
        try:
            return loadconfig(user_config)['usertype'] == 'reseller'
        except IndexError as e:
            raise ParsingError('User config exists, but no usertype given') from e
    return False


def get_user_login_url(domain):
    return f'http://{domain}:2222'


def _get_da_php_config():
    """
    Return map (PHP_DA_CODE:{PHP_HANDLER, PHP_VERSION})
    :return:
    """
    _php_da_map = {}
    try:
        php_cfg = loadconfig(DA_OPT_PATH)
    except (IOError, OSError):
        return None

    # iterate through custombuild options.conf php_mode and php_release options
    i = 1
    while f'php{i}_mode' in php_cfg and f'php{i}_release' in php_cfg:
        _php_da_map[str(i)] = {}
        _php_da_map[str(i)]['handler_type'] = php_cfg[f'php{i}_mode']
        _php_da_map[str(i)]['php_version_id'] = php_cfg[f'php{i}_release']
        i += 1
    return _php_da_map


def _get_php_code_info_for_domain(domain, owner):
    """
    Return php code from domain config
    :param domain:
    :param owner:
    :return: string '1' or '2' - php code in DA
    """
    domain_config_file = os.path.join(DA_USERS_PATH, str(owner), 'domains', str(domain) + '.conf')
    try:
        domain_config = loadconfig(domain_config_file)
    except (IOError, OSError):
        return '1'
    domain_php = domain_config.get('php1_select')
    # None - DA custombuild has only one php version
    # '0' - it means that user selected default version PHP of DA custombuild
    if domain_php is None or domain_php == '0':
        domain_php = '1'
    return domain_php


def _get_subdomains(all_domains, mapped_all_domains):
    subdomains = []
    for domain in all_domains:
        if domain[0] in mapped_all_domains.keys():
            continue
        subdomains.append(domain[0])
    return subdomains


def get_domains_php_info():
    """
    Return php version information for each domain
    :return: domain to php info mapping
    Example output:
    {'cltest.com': {'handler_type': 'mod_php',
                     'php_version_id': '7.1',
                     'username': 'cltest'},
     'cltest2.com': {'handler_type': 'fastcgi',
                      'php_version_id': '7.3',
                      'username': 'kek_2'},
     'cltest3.com': {'handler_type': 'suphp',
                      'php_version_id': '5.5',
                      'username': 'cltest3'},
     'omg.kek': {'handler_type': 'php-fpm',
                  'php_version_id': '5.2',
                  'username': 'cltest'}}
    :rtype: dict[str, dict]
    """
    # returns only main domains
    map_domain_user = _load_domains_owners()
    result_map = {}
    php_da_map = _get_da_php_config()
    if php_da_map is None:
        return result_map

    owner_to_domains: dict[str, list[str]] = {}
    for domain, owner in map_domain_user.items():
        owner_to_domains.setdefault(owner, []).append(domain)

    for owner, domains in owner_to_domains.items():
        all_domains_in_httpd_file = userdomains(owner)

        # get safely to not break something to other teams
        try:
            subdomains = _get_subdomains(all_domains_in_httpd_file, map_domain_user)
        except Exception:
            subdomains = []

        for domain in domains:
            php_info_code = _get_php_code_info_for_domain(domain, owner)
            if php_info_code not in php_da_map \
                    or php_da_map[php_info_code]['php_version_id'] == 'no':
                # 'no' means that php_release specified in user's config
                # does not exist in custombuild options.conf
                php_info_code = '1'

            php_info = php_da_map[php_info_code]

            try:
                domain_aliases = _useraliases(owner, domain)
            except Exception:
                domain_aliases = []

            # https://forum.directadmin.com/threads/sub-domain-different-php-version.58426/
            # subdomain version should be the same as main domain
            for domain_entity in [domain] + subdomains + domain_aliases:
                result_map[domain_entity] = DomainDescription(
                    username=owner,
                    php_version_id=php_info['php_version_id'],
                    handler_type=php_info['handler_type'],
                    display_version=f'php{php_info["php_version_id"].replace(".", "")}'
                )

    return result_map


def _get_installed_alt_php_versions():
    """
    Gets installed alt-phpXY - could be chosen via CloudLinux PHP Selector w/o being compiled via custombuild
    """
    installed_list = []
    alt_phps_directory = '/opt/alt/'
    pattern = re.compile(r'^php\d+$')

    for item in os.listdir(alt_phps_directory):
        item_path = os.path.join(alt_phps_directory, item)

        # Check if the item is a directory and its name matches the pattern
        if os.path.isdir(item_path) and pattern.match(item) and os.path.exists(f'{item_path}/usr/bin/php'):
            version = item.replace('php', '')
            installed_list.append(PHPDescription(
                identifier=f'alt-{item}',
                version=f'{version[:1]}.{version[1:]}',
                dir=f'{item_path}/',
                modules_dir=os.path.join(item_path, 'usr/lib64/php/modules/'),
                bin=os.path.join(item_path, 'usr/bin/php'),
                ini=os.path.join(item_path, 'link/conf/default.ini'),
            ))
    return installed_list


def _get_da_php_extension_dir(directadmin_php_dir):
    return subprocess.run(
        [f'{directadmin_php_dir}bin/php-config', '--extension-dir'],
        text=True,
        capture_output=True,
        check=False,
    ).stdout


def _get_compiled_custombuild_versions():
    """
    Gets compiled phpXY - could be chosen via DirectAdmin PHP Selector
    """
    php_da_map = _get_da_php_config()
    if php_da_map is None:
        return []

    # {'1': {'handler_type': 'php-fpm', 'php_version_id': '7.4'},
    # '2': {'handler_type': 'php-fpm', 'php_version_id': '8.0'},
    # '3': {'handler_type': 'php-fpm', 'php_version_id': 'no'},
    # '4': {'handler_type': 'php-fpm', 'php_version_id': 'no'}}

    installed_php_data = php_da_map.values()
    installed_list = []

    # obtain php version compiled via custombuild: phpXY
    for version_info in installed_php_data:
        version = version_info['php_version_id']

        if version == 'no':
            continue

        directadmin_php_dir = f'/usr/local/php{version.replace(".", "")}/'

        if not os.path.exists(directadmin_php_dir):
            continue

        modules_dir_path = _get_da_php_extension_dir(directadmin_php_dir)
        if modules_dir_path:
            modules_dir_path = modules_dir_path.strip()

        installed_list.append(PHPDescription(
            identifier=f'php{version.replace(".", "")}',
            version=version,
            dir=os.path.join(directadmin_php_dir),
            modules_dir=modules_dir_path,
            bin=os.path.join(directadmin_php_dir, 'bin/php'),
            ini=os.path.join(directadmin_php_dir, 'lib/php.ini'),
        ))
    return installed_list


def _get_aliases(path):
    """
    Parse user aliases file and return data
    """
    if not os.path.exists(path):
        return []
    data = []
    try:
        with open(path, encoding='utf-8') as f:
            data = f.readlines()
    except IOError as e:
        syslog.syslog(syslog.LOG_WARNING, f'Can`t open file "{path}" due to : "{e}"')
    return [record.strip().split('=')[0] for record in data]

def _useraliases(cpuser, domain):
    """
    Return aliases from user domain
    :param str|unicode cpuser: user login
    :param str|unicode domain:
    :return list of aliases
    """
    path = f'/usr/local/directadmin/data/users/{cpuser}/domains/{domain}.pointers'
    data = _get_aliases(path)
    return data


class PanelPlugin(GeneralPanelPluginV1):
    HTTPD_CONFIG_FILE = '/etc/httpd/conf/httpd.conf'
    HTTPD_MPM_CONFIG = '/etc/httpd/conf/extra/httpd-mpm.conf'
    HTTPD_INFO_CONFIG = '/etc/httpd/conf/extra/httpd-info.conf'

    def __init__(self):
        super().__init__()
        self.ADMINS_LIST = os.path.join(ADMIN_DIR, 'admin.list')

    def getCPName(self):
        """
        Return panel name
        :return:
        """
        return __cpname__

    def get_cp_description(self):
        """
        Retrieve panel name and it's version
        :return: dict: { 'name': 'panel_name', 'version': 'panel_version', 'additional_info': 'add_info'}
            or None if can't get info
        """
        try:
            with subprocess.Popen(
                ['/usr/local/directadmin/directadmin', 'v'],
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE,
                text=True
            ) as p:
                out, _ = p.communicate()

            # output may differ (depending on version):
            # 'Version: DirectAdmin v.1.642'
            # 'DirectAdmin v.1.643 55acaa256ec6ed99b9aaec1050de793b298f62b0'
            # 'DirectAdmin 1.644 55acaa256ec6ed99b9aaec1050de793b298f62b0'
            version_words = (word.lstrip('v.') for word in out.split())

            def _is_float(s):
                return s.replace('.', '').isdigit()

            version = next(filter(_is_float, version_words), '')
            return {'name': __cpname__, 'version': version, 'additional_info': None}
        except Exception:
            return None

    def db_access(self):
        """
        Getting root access to mysql database.
        For example {'login': 'root', 'db': 'mysql', 'host': 'localhost', 'pass': '9pJUv38sAqqW'}

        :return: root access to mysql database
        :rtype: dict
        :raises: NoDBAccessData
        """
        return db_access()

    def cpusers(self):
        """
        Generates a list of cpusers registered in the control panel

        :return: list of cpusers registered in the control panel
        :rtype: tuple
        """
        return cpusers()

    def resellers(self):
        """
        Generates a list of resellers in the control panel

        :return: list of cpusers registered in the control panel
        :rtype: tuple
        """
        return resellers()

    def is_reseller(self, username):
        """
        Check if given user is reseller;
        :type username: str
        :rtype: bool
        """
        return is_reseller(username)

    # unlike admins(), this method works fine in post_create_user
    # hook; looks like directadmin updates admins.list a little bit later
    # then calls post_create_user.sh
    def is_admin(self, username):
        """
        Return True if username is in admin names
        :param str username: user to check
        :return: bool
        """
        user_conf_file = os.path.join(DA_USERS_PATH, username, USER_CONF)
        if not os.path.exists(user_conf_file):
            return False
        user_config = load_fast(user_conf_file)
        return user_config['usertype'] == 'admin'

    def dblogin_cplogin_pairs(self, cplogin_lst=None, with_system_users=False):
        """
        Get mapping between system and DB users
        @param cplogin_lst :list: list with usernames for generate mapping
        @param with_system_users :bool: add system users to result list or no.
                                        default: False
        """
        return dblogin_cplogin_pairs(cplogin_lst, with_system_users)

    def cpinfo(self, cpuser=None, keyls=('cplogin', 'package', 'mail', 'reseller', 'dns', 'locale'),
               search_sys_users=True):
        """
        Retrieves info about panel user(s)
        :param str|unicode|list|tuple|None cpuser: user login
        :param keyls: list of data which is necessary to obtain the user,
                        the valuescan be:
           cplogin - name/login user control panel
           mail - Email users
           reseller - name reseller/owner users
           locale - localization of the user account
           package - User name of the package
           dns - domain of the user
        :param bool search_sys_users: search for cpuser in sys_users or in control panel users (e.g. for Plesk)
        :return: returns a tuple of tuples of data in the same sequence as specified keys in keylst
        :rtype: tuple
        """
        return cpinfo(cpuser, keyls, search_sys_users=search_sys_users)

    def get_admin_email(self):
        """
        Retrieve admin email address
        :return: Host admin's email
        """
        return get_admin_email()

    def docroot(self, domain):
        """
        Return document root for domain
        :param str|unicode domain:
        :return Cortege: (document_root, owner)
        """
        return docroot(domain)

    @staticmethod
    def useraliases(cpuser, domain):
        return _useraliases(cpuser, domain)

    def userdomains(self, cpuser):
        """
        Return domain and document root pairs for control panel user
        first domain is main domain
        :param str|unicode cpuser: user login
        :return list of tuples (domain_name, documen_root)
        """
        return userdomains(cpuser)

    def homedirs(self):
        """
        Detects and returns list of folders contained the home dirs of users of the cPanel
        :return: list of folders, which are parent of home dirs of users of the panel
        """
        return homedirs()

    def reseller_users(self, resellername=None):
        """
        Return reseller users
        :param resellername: reseller name; autodetect name if None
        :return list[str]: user names list
        """
        return reseller_users(resellername)

    def reseller_domains(self, resellername=None):
        """
        Get dict[user, domain]
        :param reseller_name: reseller's name
        :rtype: dict[str, str|None]
        :raises DomainException: if cannot obtain domains
        """
        return reseller_domains(resellername)

    def get_user_login_url(self, domain):
        """
        Get login url for current panel;
        :type domain: str
        :rtype: str
        """
        return get_user_login_url(domain)

    def admins(self):
        """
        List all admins names in given control panel
        :return: list of strings
        """
        return admins()

    def domain_owner(self, domain):
        """
        Return domain's owner
        :param domain: Domain/sub-domain/add-domain name
        :rtype: str
        :return: user name or None if domain not found
        """
        return domain_owner(domain)

    def get_domains_php_info(self):
        """
        Return php version information for each domain
        :return: domain to php info mapping
        :rtype: dict[str, dict]
        """
        return get_domains_php_info()

    @staticmethod
    def _get_da_skin_name():
        """
        Retrieve current DA skin name
        :return: Current DA skin name. None if unknown
        """
        config = loadconfig(DA_CONF)

        # starting from DA 1.664 `docsroot` option was replaced by `system_skin`
        if 'system_skin' in config:
            return config['system_skin']

        # grep '^docsroot=' /usr/local/directadmin/conf/directadmin.conf | cut -d/ -f4
        docsroot = config.get('docsroot', None)
        # docsroot like './data/skins/evolution'
        if docsroot is None:
            return None
        return docsroot.split('/')[-1]

    @staticmethod
    def get_encoding_name():
        """
        Retrieve encoding name, used for package/reseller names
        :return:
        """
        enhanced_skin_config = os.path.join(DA_DIR, "data/skins/enhanced/lang/en/lf_standard.html")
        default_encoding = 'utf8'
        current_skin = PanelPlugin._get_da_skin_name()
        if current_skin == 'enhanced':
            # For enchanced skin we read encoding from its config
            # :LANG_ENCODING=iso-8859-1  see LU-99 for more info
            skin_config = loadconfig(enhanced_skin_config)
            # Option in file is 'LANG_ENCODING', but key is lowercase
            return skin_config.get('lang_encoding', default_encoding)
        return default_encoding

    def get_unsupported_cl_features(self) -> tuple[Feature, ...]:
        return (
            Feature.RUBY_SELECTOR,
        )

    @staticmethod
    def get_apache_ports_list() -> List[int]:
        """
        Retrieves active httpd's ports from httpd's config
        :return: list of apache's ports
        """
        # cat /etc/apache2/conf/httpd.conf | grep Listen
        _httpd_ports_list = []
        try:
            lines = get_file_lines(PanelPlugin.HTTPD_CONFIG_FILE)
        except (OSError, IOError):
            return None
        lines = [line.strip() for line in lines]
        for line in grep('Listen', match_any_position=False, multiple_search=True, data_from_file=lines):
            # line examples:
            # Listen 0.0.0.0:80
            # Listen [::]:80
            try:
                value = int(line.split(' ')[1])
                if value not in _httpd_ports_list:
                    _httpd_ports_list.append(value)
            except (IndexError, ValueError):
                pass
        if not _httpd_ports_list:
            _httpd_ports_list.append(80)
        return _httpd_ports_list

    @staticmethod
    def _get_active_web_server_params() -> Tuple[str, str]:
        """
        Determines active web server from options.conf, directive 'webserver'
        :return: tuple (active_web_server_name, apache_active_module_name)
            active_web_server_name: 'apache', 'nginx', 'nginx_apache', 'litespeed', 'openlitespeed', etc
            apache_active_module_name: 'prefork', 'event', 'worker'
            (None, None) if DA options.conf read/parse error
        """
        web_server_name = None
        apache_active_module_name = None
        try:
            # cat /usr/local/directadmin/custombuild/options.conf | grep webserver
            # webserver=apache
            #   webserver can be: apache, nginx, nginx_apache, litespeed, openlitespeed.
            options_lines = get_file_lines(DA_OPT_PATH)
            grep_result_list = list(grep('^apache_mpm|^webserver', fixed_string=False, match_any_position=False,
                                         multiple_search=True, data_from_file=options_lines))
            # grep_result_list example: ['webserver=apache\n', 'apache_mpm=auto\n']
            for line in grep_result_list:
                line_parts = line.strip().split('=')
                if line_parts[0] == 'webserver':
                    web_server_name = line_parts[1]
                if line_parts[0] == 'apache_mpm':
                    apache_active_module_name = line_parts[1]
                    # modules are 'prefork', 'event', 'worker'. 'auto' == 'worker'
                    if apache_active_module_name == 'auto':
                        apache_active_module_name = 'worker'
        except (OSError, IOError, IndexError):
            pass
        return web_server_name, apache_active_module_name

    def _get_max_request_workers_for_module(self, apache_module_name: str) -> Tuple[int, str]:
        """
        Determine MaxRequestWorkers directive value for specified apache module.
        Reads config file /etc/httpd/conf/extra/httpd-mpm.conf
        :param apache_module_name: Current apache's module name: 'prefork', 'event', 'worker'
        :return: tuple (max_req_num, message)
            max_req_num - Maximum request apache workers number or 0 if error
            message - OK/Error message
        """
        try:
            return find_module_param_in_config(self.HTTPD_MPM_CONFIG,
                                               apache_module_name,
                                               'MaxRequestWorkers')
        except (OSError, IOError, IndexError, ValueError):
            return 0, format_exc()

    def get_apache_max_request_workers(self) -> Tuple[int, str]:
        """
        Get current maximum request apache workers from httpd's config
        :return: tuple (max_req_num, message)
            max_req_num - Maximum request apache workers number or 0 if error
            message - OK/Error message
        """
        web_server_name, apache_active_module_name = self._get_active_web_server_params()
        if web_server_name is None or apache_active_module_name is None:
            return 0, f"There was error during read/parse {DA_OPT_PATH}. Apache collector will not work"
        if web_server_name != "apache":
            return 0, f"DA is configured for web server '{web_server_name}'; but 'apache' is needed. " \
                      "Apache collector will not work"
        return self._get_max_request_workers_for_module(apache_active_module_name)

    def _get_httpd_status_uri(self) -> str:
        """
        Determine apache mod_status URI from /etc/httpd/conf/extra/httpd-info.conf config
        :return Apache mod_status URI or None if error/not found
        """
        location_uri = None
        try:
            # # grep -B 2 'SetHandler server-status' /etc/httpd/conf/extra/httpd-info.conf
            #
            # <Location /server-status>
            #     SetHandler server-status
            info_lines = get_file_lines(self.HTTPD_INFO_CONFIG)
            location_directive = '<Location'
            location_line = None
            for line in info_lines:
                line = line.strip()
                if line.startswith(location_directive):
                    # Location directive found, save it
                    location_line = line
                    continue
                if line.startswith('SetHandler server-status') and location_line:
                    # server-status found, Extract URI from Location directive start tag
                    location_uri = location_line.replace(location_directive, '').replace('>', '').strip()
                    break
        except (OSError, IOError):
            pass
        return location_uri

    def get_apache_connections_number(self):
        """
        Retrieves Apache's connections number (from apache's mod_status)
        :return: tuple (conn_num, message)
            conn_num - current connections number, 0 if error
            message - OK/Trace
        """
        web_server_name, _ = self._get_active_web_server_params()
        if web_server_name is None:
            return 0, f"There was error during read/parse {DA_OPT_PATH}. Apache collector will not work"
        if web_server_name != "apache":
            return 0, f"DA is configured for web server '{web_server_name}'; but 'apache' is needed. " \
                      "Apache collector will not work"
        try:
            # curl localhost/server-status?auto | grep "Total Accesses"
            # Total Accesses: 25
            location_uri = self._get_httpd_status_uri()
            if location_uri is None:
                return 0, "Can't found mod_status URI in configs"
            url = f'http://127.0.0.1{location_uri}?auto'
            response = requests.get(url, timeout=5)
            if response.status_code != 200:
                return 0, f"GET {url} response code is {response.status_code}"
            s_response = response.content.decode('utf-8')
            s_response_list = s_response.split('\n')
            out_list = list(grep("Total Accesses", data_from_file=s_response_list))
            # out_list example: ['Total Accesses: 200']
            s_total_accesses = out_list[0].split(':')[1].strip()
            return int(s_total_accesses), 'OK'
        except Exception:
            return 0, format_exc()

    @staticmethod
    def get_installed_php_versions():
        """
        Returns installed alt-php(s) on the server
        compiled phpXY via custombuild and alt-phpXY has different paths

        also user could choose version via PHP selector which was not compiled with custombuild
        (will be absent in DA configs)
        """
        return _get_installed_alt_php_versions() + _get_compiled_custombuild_versions()

    def get_server_ip(self):
        ip_list_file = '/usr/local/directadmin/data/admin/ip.list'
        if not os.path.exists(ip_list_file):
            return ''

        with open(ip_list_file, encoding='utf-8') as f:
            ips = f.readlines()

        if not ips:
            return ''

        return ips[0].strip()

    @staticmethod
    def get_user_emails_list(username: str, domain: str):
        user_conf = f'/usr/local/directadmin/data/users/{username}/user.conf'
        if not os.path.exists(user_conf):
            return ''

        user_conf = load_fast(user_conf)
        return user_conf.get('email', '')

    @staticmethod
    def panel_login_link(username):
        generated_login = subprocess.run(['/usr/local/directadmin/directadmin',
                                          '--create-login-url', f'user={username}'],
                                         capture_output=True, text=True, check=False).stdout
        # http://server-206-252-237-2.da.direct:2222/api/login/url?key=0SrJm1CNAIh34w4Fk8Kp4ohypUFp_pMm
        if len(generated_login) == 0:
            return ''
        parsed = urlparse(generated_login)
        return f'{parsed.scheme}://{parsed.netloc}/'

    @staticmethod
    def panel_awp_link(username):
        link = PanelPlugin.panel_login_link(username).rstrip("/")
        if len(link) == 0:
            return ''
        return f'{link}/evo/user/plugins/awp#/'

    def suspended_users_list(self):
        all_users = cpusers()
        suspended_users = []
        for user in all_users:
            user_conf_file = os.path.join(DA_USERS_PATH, user, USER_CONF)

            if not os.path.exists(user_conf_file):
                continue

            user_config = load_fast(user_conf_file)
            if user_config.get('suspended') == 'yes':
                suspended_users.append(user)

        return suspended_users