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

# Copyright 2016 Mir Calculate. http://www.calculate-linux.org
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.

import sys
from calculate.lib.datavars import (ReadonlyVariable, Variable,
                                    VariableInterface, VariableError)
from calculate.lib.utils.tools import repeater
from calculate.lib.cl_ldap import LDAPConnect, LDAPConnectError
from helpers import ServerEnvHelper, HashHelper, RandomPasswordHelper

_ = lambda x: x
from calculate.lib.cl_lang import (setLocalTranslate, getLazyLocalTranslate)

setLocalTranslate('cl_ldap3', sys.modules[__name__])
__ = getLazyLocalTranslate(_)


class VariableLdBaseRoot(Variable):
    """
    Имя для базового суффикса
    """
    value = "calculate"
    opt = ("-b", "--basedn")
    metavalue = "BASEDN"

    def init(self):
        self.label = _("Root base DN")
        self.help = "set root base DN"

    def set(self, value):
        if value.startswith("dc="):
            return value[3:]
        return value


class VariableLdBaseDn(ReadonlyVariable):
    """
    Базовый суффикс LDAP
    """
    value_format = "dc={ld_base_root}"

    def init(self):
        self.label = _("Base DN")


class VariableLdBindLogin(Variable):
    """
    Пользователь для чтения
    """
    value = "proxyuser"


class VariableLdBindDn(ReadonlyVariable):
    """
    Bind суффикс LDAP
    """
    value_format = "cn={ld_bind_login},{ld_base_dn}"


class VariableLdBindPw(ReadonlyVariable):
    """
    Пароль для подключения
    """
    value = "calculate"


class VariableLdBindHash(HashHelper, ReadonlyVariable):
    """
    Хэш рут пароля
    """
    source = "ld_bind_pw"


class VariableLdTempDn(ReadonlyVariable):
    """
    Временный DN для подключения
    """
    value_format = "cn=ldaproot,{ld_base_dn}"


class VariableLdTempPw(RandomPasswordHelper, ReadonlyVariable):
    """
    Временный пароль для подключения к LDAP
    """
    password_len = 9

    def get(self):
        return "test"


class VariableLdTempHash(HashHelper, ReadonlyVariable):
    """
    Временный пароль для подключения к LDAP
    """
    source = "ld_temp_pw"


class VariableClLdapPreconfigureSet(ReadonlyVariable):
    """
    Предварительное наложение шаблонов
    """
    type = "bool"
    value = "off"


class VariableLdAdminDn(ReadonlyVariable):
    """
    DN root пользователя
    """
    value_format = "cn={ld_admin_login},{ld_base_dn}"


class VariableLdAdminLogin(ReadonlyVariable):
    """
    Имя пользователя root
    """
    value = "ldapadmin"


class VariableLdEncrypt(ReadonlyVariable):
    """
    Алгоритм шифрования пароля
    """
    value = "{SSHA}"


class VariableLdAdminHash(HashHelper, ReadonlyVariable):
    """
    Хэш рут пароля
    """
    source = "ld_admin_pw"


class VariableLdAdminPw(ServerEnvHelper, RandomPasswordHelper, Variable):
    """
    Пароль root
    """
    password_len = 9
    service = "admin"
    parameter = "pass"

    @property
    def fallback_value(self):
        return "test"
        # return RandomPasswordHelper.get(self)


class VariableLdServices(ReadonlyVariable):
    """
    Имя всех сервисов
    """
    value = "Services"


class VariableLdServicesDn(ReadonlyVariable):
    """
    DN для всех сервисов
    """
    value_format = "ou={ld_services},{ld_base_dn}"


class VariableLdDatabasePath(Variable):
    """
    Путь до базы LDAP
    """
    value = "/var/lib/openldap-data"


class VariableClLdapHost(Variable):
    """
    Узел LDAP
    """
    value = "localhost"


class VariableClLdapBindDn(Variable):
    """
    Переменная используется для соединения с LDAP
    """
    value = ""


class VariableClLdapBindPw(Variable):
    """
    Переменная используется для соединения с LDAP
    """
    value = ""


class VariableClLdapConnect(ReadonlyVariable):
    """
    Объект соединение с LDAP
    """
    type = "object"

    def get(self):
        bind_dn = self.Get('cl_ldap_bind_dn')
        bind_pw = self.Get('cl_ldap_bind_pw')
        ldap_host = self.Get('cl_ldap_host')
        if bind_dn and bind_pw:
            error = ""
            for x in repeater(0.2, 0.4, 0.8):
                try:
                    return LDAPConnect(bind_dn, bind_pw, host=ldap_host)
                except LDAPConnectError as e:
                    error = str(e)
            raise VariableError(_("Failed to connect to LDAP server")
                                + _(": ") + error)
        return ""