#!/usr/bin/python3
#
# SPDX-License-Identifier: Apache-2.0
#

"""
This module provides functionality to initialize logging for a lab, create a sub-directory
for the current run, set the logging level, and create a symbolic link to the latest logs
for the lab.
"""

import os
import datetime
import logging
from consts.env import LOGPATH

LOG_DIR = ""
LOG = logging.getLogger()


def init_logging(lab_name, log_path=None):
    """
    This method initializes the logging for a lab. It creates a sub-directory for the
    current run and sets the logging level to INFO. It also creates a symbolic link to
    the latest logs for the lab. The method takes in the lab name and an optional log path
    parameter. If no log path is specified, it uses the default path provided by the
    LOGPATH constant in the env module.
    """

    global LOG, LOG_DIR  # pylint: disable=global-statement, global-variable-not-assigned
    if not log_path:
        log_path = LOGPATH
    lab_log_path = log_path + "/" + lab_name

    # Setup log sub-directory for current run
    current_time = datetime.datetime.now()
    LOG_DIR = f"{lab_log_path}/{current_time.year}_{current_time.month}_" \
              f"{current_time.day}_{current_time.hour}_{current_time.minute}_{current_time.second}"
    if not os.path.exists(LOG_DIR):
        os.makedirs(LOG_DIR)

    LOG.setLevel(logging.INFO)
    formatter = logging.Formatter("%(asctime)s: %(message)s")
    log_file = f"{LOG_DIR}/install.log"
    handler = logging.FileHandler(log_file)
    handler.setFormatter(formatter)
    handler.setLevel(logging.INFO)
    LOG.addHandler(handler)
    handler = logging.StreamHandler()
    handler.setFormatter(formatter)
    LOG.addHandler(handler)

    # Create symbolic link to latest logs of this lab
    try:
        os.unlink(lab_log_path + "/latest")
    except FileNotFoundError:
        pass

    os.symlink(LOG_DIR, lab_log_path + "/latest")


def get_log_dir():
    """This method returns the log directory"""

    return LOG_DIR