#
#  Copyright (c) 2013-present, Anoop Kunchukuttan
#  All rights reserved.
#
#  This source code is licensed under the MIT license found in the
#  LICENSE file in the root directory of this source tree.
#

import os
from pathlib import Path

"""
Path to the Indic NLP Resources directory
"""
INDIC_RESOURCES_PATH = os.path.join(Path(__file__).resolve().parent, "RESOURCES")


def init():
    """
    Initialize the module. The following actions are performed:

    - Checks of INDIC_RESOURCES_PATH variable is set. If not, checks if it can beb initialized from
        INDIC_RESOURCES_PATH environment variable. If that fails, an exception is raised
    """
    global INDIC_RESOURCES_PATH
    try:
        if INDIC_RESOURCES_PATH == "":
            INDIC_RESOURCES_PATH = os.environ["INDIC_RESOURCES_PATH"]
    except Exception as e:
        raise IndicNlpException("INDIC_RESOURCES_PATH not set")

    if INDIC_RESOURCES_PATH == "":
        raise IndicNlpException("INDIC_RESOURCES_PATH not set")


def get_resources_path():
    """
    Get the path to the Indic NLP Resources directory
    """
    return INDIC_RESOURCES_PATH


def set_resources_path(resources_path):
    """
    Set the path to the Indic NLP Resources directory
    """
    global INDIC_RESOURCES_PATH
    INDIC_RESOURCES_PATH = resources_path


class IndicNlpException(Exception):
    """
    Exceptions thrown by Indic NLP Library components are instances of this class.
    'msg' attribute contains exception details.
    """

    def __init__(self, msg):
        self.msg = msg

    def __str__(self):
        return repr(self.msg)