# MySQL Connector/Python - MySQL driver written in Python.
# Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.

# MySQL Connector/Python is licensed under the terms of the GPLv2
# <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
# MySQL Connectors. There are special exceptions to the terms and
# conditions of the GPLv2 as it is applied to this software, see the
# FOSS License Exception
# <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

"""Translations
"""

__all__ = [
    'get_client_error'
]

from .. import errorcode

def get_client_error(error, language='eng'):
    """Lookup client error

    This function will lookup the client error message based on the given
    error and return the error message. If the error was not found,
    None will be returned.

    Error can be either an integer or a string. For example:
        error: 2000
        error: CR_UNKNOWN_ERROR

    The language attribute can be used to retrieve a localized message, when
    available.

    Returns a string or None.
    """
    try:
        tmp = __import__('mysql.connector.locales.{0}'.format(language),
                         globals(), locals(), ['client_error'])
    except ImportError:
        raise ImportError("No localization support for language '{0}'".format(
            language))
    client_error = tmp.client_error

    if isinstance(error, int):
        errno = error
        for key, value in errorcode.__dict__.items():
            if value == errno:
                error = key
                break

    if isinstance(error, (str)):
        try:
            return getattr(client_error, error)
        except AttributeError:
            return None

    raise ValueError("error argument needs to be either an integer or string")
