import re

import sys

import os

import subprocess

import socket

from parser import WhoisEntry

from whois import NICClient

def whois(url):

    # clean domain to expose netloc

    ip_match = re.match(r"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$", url)

    if ip_match:

        domain = url

    else:

        domain = extract_domain(url)

    try:

        # try native whois command first

        r = subprocess.Popen(['whois', domain], stdout=subprocess.PIPE)

        text = r.stdout.read()

    except OSError:

        # try experimental client

        nic_client = NICClient()

        text = nic_client.whois_lookup(None, domain, 0)

    return WhoisEntry.load(domain, text)

def extract_domain(url):

    """Extract the domain from the given URL

    >>> extract_domain('http://www.google.com.au/tos.html')

    'google.com.au'

    >>> extract_domain('http://blog.webscraping.com')

    'webscraping.com'

    >>> extract_domain('www.bbc.co.uk')

    'bbc.co.uk'

    >>> extract_domain('198.252.206.140')

    'stackoverflow.com'

    >>> extract_domain('102.112.2O7.net')

    '2o7.net'

    >>> extract_domain('1-0-1-1-1-0-1-1-1-1-1-1-1-.0-0-0-0-0-0-0-0-0-0-0-0-0-10-0-0-0-0-0-0-0-0-0-0-0-0-0.info')

    '0-0-0-0-0-0-0-0-0-0-0-0-0-10-0-0-0-0-0-0-0-0-0-0-0-0-0.info'

    """

    if re.match(r'\d+\.\d+\.\d+\.\d+', url):

        # this is an IP address

        return socket.gethostbyaddr(url)[0]

    suffixes = [

        line.lower().strip()

        for line in open(tlds_path).readlines()

        if not line.startswith('#')

    ]

    url = re.sub('^.*://', '', url).split('/')[0].lower()

    domain = []

    for section in url.split('.'):

        if section in suffixes:

            domain.append(section)

        else:

            domain = [section]

    return '.'.join(domain)

if __name__ == '__main__':

    try:

        url = sys.argv[1]

    except IndexError:

        print('Usage: %s url' % sys.argv[0])

    else:

        print(whois(url))