import argparse

args = None


def get_args():
    global args
    if args is None:
        args = parse_args()
    return args


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('-f', '--file',
                        type=str,
                        help='Path to the csv or yml file, depends on the mode',
                        required=True)
    parser.add_argument('-m', '--mode',
                        type=int,
                        default=0,
                        help='Mode of the script; 0 - one file, 1 - dir')
    parser.add_argument('-i', '--img_prefix',
                        type=str,
                        default='.',
                        help="Prefix in which to save resulted images. default: current pwd")
    parser.add_argument('-y', '--yml_prefix',
                        type=str,
                        default='.',
                        help="Prefix in which to save resulted yaml files. default: current pwd")
    return parser.parse_args()