import platform
import re

host_window = r'C:\Windows\System32\drivers\etc\hosts'
host_mac = r'/etc/hosts'


HOST_LIVE = ['#dcalc', '127.0.0.1:17173       www.dcalc.com']


def search_host(hostvalue):
    if platform.system().lower() != 'windows':
        host_path = host_mac
    else:
        host_path = host_window
    with open(host_path, errors='ignore') as hostfile:
        each_line = hostfile.readlines()
    findresult = re.findall(hostvalue, ''.join(each_line))
    return findresult


def write_host(hostvalue):
    if platform.system().lower() != 'windows':
        output = open(host_mac, 'a')
    else:
        output = open(host_window, 'a')

    with output:
        for insid in hostvalue:
            output.write(insid)
            output.write('\n')


def host_init():
    if not search_host(HOST_LIVE[0]):
        write_host(HOST_LIVE)