'''Docstring to silence pylint; ignores --ignore option for __init__.py'''
import sys
import os
import logging

# Global config dictionary
# Populated by oft.
config = {}

# Global DataPlane instance used by all tests.
# Populated by oft.
dataplane_instance = None

def open_logfile(name):
    """
    (Re)open logfile

    When using a log directory a new logfile is created for each test. The same
    code is used to implement a single logfile in the absence of --log-dir.
    """

    _format = "%(asctime)s.%(msecs)03d  %(name)-10s: %(levelname)-8s: %(message)s"
    _datefmt = "%H:%M:%S"

    if config["log_dir"] != None:
        filename = os.path.join(config["log_dir"], name) + ".log"
    else:
        filename = config["log_file"]

    logger = logging.getLogger()

    # Remove any existing handlers
    for handler in logger.handlers:
        logger.removeHandler(handler)
        handler.close()

    # Add a new handler
    handler = logging.FileHandler(filename, mode='a')
    handler.setFormatter(logging.Formatter(_format, _datefmt))
    logger.addHandler(handler)