#!/usr/bin/env python

import sys
import os
import logging

""" @var formatting delimiter consisting of '=' characters """
double_line_delim = '=' * 70
""" @var formatting delimiter consisting of '-' characters """
single_line_delim = '-' * 70


def colorize(msg, color):
    return color + msg + COLOR_RESET


class ColorFormatter(logging.Formatter):

    def init(self, fmt=None, datefmt=None):
        super(ColorFormatter, self).__init__(fmt, datefmt)

    def format(self, record):
        message = super(ColorFormatter, self).format(record)
        if hasattr(record, 'color'):
            message = colorize(message, record.color)
        return message

handler = logging.StreamHandler(sys.stdout)
handler.setFormatter(ColorFormatter())

global_logger = logging.getLogger()
global_logger.addHandler(handler)
try:
    verbose = int(os.getenv("V", 0))
except:
    verbose = 0

# 40 = ERROR, 30 = WARNING, 20 = INFO, 10 = DEBUG, 0 = NOTSET (all messages)
if verbose >= 2:
    log_level = 10
elif verbose == 1:
    log_level = 20
else:
    log_level = 40

scapy_logger = logging.getLogger("scapy.runtime")
scapy_logger.setLevel(logging.ERROR)


def getLogger(name):
    logger = logging.getLogger(name)
    logger.setLevel(log_level)
    return logger

# Static variables to store color formatting strings.
#
# These variables (RED, GREEN, YELLOW and LPURPLE) are used to configure
# the color of the text to be printed in the terminal. Variable COLOR_RESET
# is used to revert the text color to the default one.
if hasattr(sys.stdout, 'isatty') and sys.stdout.isatty():
    RED = '\033[91m'
    GREEN = '\033[92m'
    YELLOW = '\033[93m'
    LPURPLE = '\033[94m'
    COLOR_RESET = '\033[0m'
else:
    RED = ''
    GREEN = ''
    YELLOW = ''
    LPURPLE = ''
    COLOR_RESET = ''