# -*- coding: utf-8 -*-

# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2018 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT
"""
CloudLinux control panel API
API for Hosting control panel
"""
import os
from functools import lru_cache

from .const import CACHE_CPNAME, UNKNOWN_CP_NAME
from clcommon.features import (
    Feature,
    get_cl_feature_status_map,
    get_hosting_accounts_limit
)

from .pluginlib import (
    get_cp_plugin_module,
    detect_panel_fast,
    CPANEL_NAME,
    DIRECTADMIN_NAME,
    PLESK_NAME,
    ISPMANAGER_NAME,
    INTERWORX_NAME,
    INTEGRATED_NAME,
    OFFICIAL_PLUGINS
)
# NOQA needed for local disable pyflakes: F401 / 'NotSupported' warning during prospector checks
from .cpapiexceptions import NotSupported, NoPanelUser    # NOQA

from clcommon.lib.cledition import (
    is_cl_solo_edition,
    CLEditionDetectionError,
    is_container
)

# If Hoster has own third-party plugins configured we can't bypass
# our cache because we need to copy them to cache dir to be able to
# import them and use to detect ControlPanel they provides.
# So we do fast detection of our "official" plugins because they used in
# most (all?) cases, and if we can't detect any CP then just fallback to
# logic with cache
_CP_NAME, _CP_PLUGIN_NAME = detect_panel_fast()


def is_cl_supported_panel():
    """
    Is current panel has native CL support
    :return: True/False
    """
    return _CP_NAME in [
        CPANEL_NAME,
        DIRECTADMIN_NAME,
        PLESK_NAME,
        ISPMANAGER_NAME,
        INTERWORX_NAME
    ]


def admin_packages(raise_exc=False):
    """
    Return list of available admin's packages
    :param raise_exc: hack for lvemanager
    :rtype: list
    :return: List of packages. For example
        ['BusinessPackage', 'Package2']
    """
    return _panel_class.admin_packages(raise_exc)


def resellers_packages(raise_exc=False):
    """
    Return dictionary, contains available resellers packages, grouped by resellers
    :rtype: dict
    :return: Dictionary.
        Example:
        {'res1': ['BusinessPackage', 'UltraPackage', 'Package'],
         'res2': ['SimplePackage', 'Package'] }
    """
    return _panel_class.resellers_packages()


def getCPName():
    """
    Return panel name
    :rtype: str
    :return: Panel name
    """
    # if we are root, get panel name from script
    if os.getegid() == 0:
        return _panel_class.getCPName()
    # if we are user:
    # - for integrated control panel return real
    #   name from scripts (they should work in cagefs)
    if OFFICIAL_PLUGINS[INTEGRATED_NAME] == _CP_PLUGIN_NAME:
        return _panel_class.getCPName()
    # - check _CP_NAME, probably detect_panel_fast was
    #   able to detect control panel
    elif _CP_NAME is not None:
        return _CP_NAME
    # - last chance - read panel name from cache file
    controlpanelname = UNKNOWN_CP_NAME
    if os.path.isfile(CACHE_CPNAME):
        with open(CACHE_CPNAME, encoding='utf-8') as cache_stream:
            controlpanelname = cache_stream.readline().strip()
    return controlpanelname


def get_cp_description():
    """
    Retrieve panel name and it's version
    :rtype: dict
    :return: dict: { 'name': 'panel_name', 'version': 'panel_version', 'additional_info': 'add_info'}
        or None if can't get info
    """
    return _panel_class.get_cp_description()


def cpusers():
    """
    Generates a list of cpusers registered in the control panel
    :return: list of cpusers registered in the control panel
    :rtype: tuple
    """
    if is_cl_supported_panel():
        # For CL supported panels we use already present plugin functions
        return _panel_class.cpusers()
    users_info = _panel_class.cpinfo(keyls=('cplogin', ))
    _list_users = [user_[0] for user_ in users_info]
    return tuple(_list_users)


def resellers():
    """
    Generates a list of resellers in the control panel
    :return: list of cpusers registered in the control panel
    :rtype: tuple
    """
    return _panel_class.resellers()


def admins():
    """
    Generates a set of admins in the control panel
    :return: set of cpusers registered in the control panel
    :rtype: set
    :raise: NotSupported
    """
    return _panel_class.admins()


def db_access():
    """
    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 _panel_class.db_access()


def dblogin_cplogin_pairs(cplogin_lst=None, with_system_users=False):
    """
    Returs a list of pairs, the database user login - user login control panel
    For example:
        (('nata2_someuse', 'nata2'), ('testsome_dfrtbus', 'testsome'))
    :param list|tuple|None cplogin_lst: list of control panel users
    :param bool with_system_users: add system users to dbmapping
    :return: list of pairs, the database user login - user login control panel
    :rtype: tuple
    :raises: NotSupported, NoPackage
    """
    return _panel_class.dblogin_cplogin_pairs(cplogin_lst, with_system_users)


def cpinfo(cpuser=None, keyls=('cplogin', 'package', 'mail', 'reseller', 'dns'),
           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 _panel_class.cpinfo(cpuser, keyls, search_sys_users=search_sys_users)


def get_admin_email():
    """
    Gets admin email
    Note: be careful when modifying this method.
    It is used in SSA, ask @dkavchuk or someone else from C-Projects team
    for details
    :rtype: string
    :return: string - admin email
    """
    if is_cl_supported_panel():
        return _panel_class.get_admin_email()
    else:
        try:
            return _panel_class.get_admin_emails_list()[0]
        except IndexError:
            return ''


def get_admin_locale():
    DEFAULT_LOCALE = 'en'
    if is_cl_supported_panel():
        try:
            return _panel_class.get_admin_locale()
        except NotSupported:
            return DEFAULT_LOCALE
    return DEFAULT_LOCALE


def docroot(domain):
    """
    Return document root for domain
    :param str|unicode domain:
    :rtype tuple
    :return Tuple: (document_root, owner)
    """
    return _panel_class.docroot(domain)


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

    return _panel_class.useraliases(cpuser, domain)


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


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


def domain_owner(domain):
    """
    Return domain's owner
    :param domain: Domain/sub-domain/add-domain name
    :rtype: str
    :return: user name or None if domain not found
    """
    if is_cl_supported_panel():
        return _panel_class.domain_owner(domain)
    _, _domain_owner = docroot(domain)
    return _domain_owner


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


def reseller_domains(resellername=None):
    """
    Return reseller users and their main domains
    :param resellername: reseller name; autodetect name if None
    :rtype disct
    :return dict[str, str]: pairs user <==> domain
    """
    return _panel_class.reseller_domains(resellername)


def is_reseller(username):
    """
    Check if user is reseller;
    :type username: str
    :rtype: bool
    """
    return _panel_class.is_reseller(username)


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


def is_admin(username):
    """
    Return True if username is in admin names
    :param str username: user to check
    :rtype bool
    :return: True if user is admin
    """
    return _panel_class.is_admin(username)


def is_reseller_limits_supported():
    """
    Return True if panel supports reseller limits (LVE10+)
    :return: bool - True - yes, False - no
    :rtype bool
    """
    panel_features = get_cl_feature_status_map()
    try:
        return panel_features[Feature.RESELLER_LIMITS]
    except KeyError:
        return False


# The method is implemented only for Plesk,
# because the resellers on Plesk can be without the system users.
# For other panels the logic of method distributed by the code of lve-utils package
def get_reseller_id_pairs():
    """
    Get dict reseller => id
    Optional method for panels without hard
    link reseller <=> system user
    :rtype: dict[str,int] - {'res1': id1}
    """
    return _panel_class.get_reseller_id_pairs()


# TODO: PTCCLIB-158
# The method should be private and moved to DA plugin
def get_encoding_name():
    """
    Retrive encoding name, used for package/reseller names, from panel
    :return:
    """
    return _panel_class.get_encoding_name()


def is_panel_feature_supported(feature: Feature) -> bool:
    """
    Get if feature is supported by control panel.
    :param
      feature: constant from Feature class
    :return:
      boolean
    """
    try:
        features = get_supported_cl_features()
        return features is None or features.get(feature, False)
    except CLEditionDetectionError:
        return False


def get_apache_connections_number():
    """
    Retrieves Apache's connections number (from mod_status)
    For CM
    """
    return _panel_class.get_apache_connections_number()


def get_apache_ports_list():
    """
    Retrieves active httpd's ports from httpd's config
    :return: list of apache's ports
    """
    return _panel_class.get_apache_ports_list()


def get_apache_max_request_workers():
    """
    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/Trace
    """
    return _panel_class.get_apache_max_request_workers()


def get_main_username_by_uid(uid: int) -> str:
    """
    Get "main" panel username by uid.
    :param uid: uid
    :return Username
    """
    return _panel_class.get_main_username_by_uid(uid)


def get_user_emails_list(username, domain):
    return _panel_class.get_user_emails_list(username, domain)

def panel_login_link(username):
    return _panel_class.panel_login_link(username)

def panel_awp_link(username):
    return _panel_class.panel_awp_link(username)


def get_unsupported_features():
    """
    Returns features that are not supported on current control panel.
    """
    return _panel_class.get_unsupported_cl_features() or {}


# Global caching need to make this method work fast,
# especially when we call it on vendors control panel.
@lru_cache()
def get_supported_cl_features():
    """
    Left here mostly for backwards compatibility.
    See get_cl_feature_status_map docstring.
    """
    return get_cl_feature_status_map()


def is_throttling_supported():
    if is_cl_solo_edition(skip_jwt_check=True) or is_container():
        return False
    return True


def get_hosting_accounts_count() -> int:
    """
    Get panel users count, admin accounts are not counted
    :return: Users count.
    """
    return _panel_class.get_hosting_accounts_count()


def is_hitting_max_accounts_limit():
    """
    Check if customer hitting max accounts count per edition
    """
    max_accounts_limit = get_hosting_accounts_limit()
    if not max_accounts_limit:
        return False

    current_accounts_count = _panel_class.get_hosting_accounts_count()
    return current_accounts_count > max_accounts_limit


def get_max_accounts_limit():
    # warn: deprecated, use features.get_hosting_accounts_limit directly
    return get_hosting_accounts_limit()


def count_hosting_accounts():
    """
    Retrieve users count and admins count,
    substract the last value from the first one and dump the result on disk
    """
    try:
        users_list = cpusers()
    except NotSupported as e:
        raise NotSupported("cpusers() method not supported") from e

    # admins returns set or list depending on the control panel in use
    admins_collection = admins()

    return sum(1 for user in users_list if user not in admins_collection)

def is_wp2_environment() -> bool:
    """
    They have symlink /usr/local/cpanel/server.type -> wp2
    """
    wp2_marker = '/usr/local/cpanel/server.type'
    if not os.path.islink(wp2_marker):
        return False

    try:
        return os.readlink('/usr/local/cpanel/server.type') == 'wp2'
    except Exception:
        return False


# Loading api
_apiplugin = get_cp_plugin_module(_CP_PLUGIN_NAME)
_panel_class = _apiplugin.PanelPlugin()
CP_NAME = getCPName()

# TODO: make a proxy that will do this stuff automatically
get_domains_php_info = _panel_class.get_domains_php_info
get_system_php_info = _panel_class.get_system_php_info
list_all = _panel_class.list_all
list_users = _panel_class.list_users
get_reseller_users = _panel_class.get_reseller_users
reseller_package_by_uid = _panel_class.reseller_package_by_uid
get_uids_list_by_package = _panel_class.get_uids_list_by_package
get_installed_php_versions = _panel_class.get_installed_php_versions
get_customer_login = _panel_class.get_customer_login
get_domain_login = _panel_class.get_domain_login
get_server_ip = _panel_class.get_server_ip
invalidate_cpapi_cache = _panel_class.invalidate_cpapi_cache
suspended_users_list = _panel_class.suspended_users_list