#/bin/python3

import sys

import tailhead

import platform
import subprocess

import datetime, time

import json

def _make_gen(reader):
    b = reader(1024 * 1024)
    while b:
        yield b
        b = reader(1024*1024)

def file_len(filename):
    """ More opti than wc on turis """
    f = open(filename, 'rb')
    f_gen = _make_gen(f.raw.read)
    return sum( buf.count(b'\n') for buf in f_gen )

def multi_ping(hosts, interface):
    """
    Returns True if host (list of str) responds to a ping request.
    Remember that a host may not respond to a ping (ICMP) request even if the host name is valid.
    """

    # Option for the number of packets as a function of
    count = '-n' if platform.system().lower()=='windows' else '-c'
    source = '-S' if platform.system().lower()=='windows' else '-I'

    if type(hosts) is list:
        procs = []
        for host in hosts:
            command = ['ping', count, '1', source, interface, host]
            proc = subprocess.Popen(command, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
            procs.append(proc)

        procs_done = []
        while True:
            for proc in procs:
                if proc.poll() is not None:
                    procs_done.append(proc.poll())
                    procs.pop(procs.index(proc))
            if len(procs) == 0:
                #print("o")
                break
            time.sleep(1)

        if 0 in procs_done:
            return 0
        else:
            return 1

    else:
        print("fuck you host must be a list")
        sys.exit()


def log_write(status):
    with open(LOG_PATH_FILE, 'a') as f:
        f.write("{} {}\n".format(tools.date(), status))

def uqmi_current_settings():
    command = ['uqmi', '-d', '/dev/cdc-wdm0', '--get-current-settings']
    proc = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    datas = json.loads(proc.stdout)
    return datas["ipv4"]["ip"], datas["ipv4"]["gateway"], datas["ipv4"]["subnet"]

def ifconfig_update(interface, ip, subnet):
    command = ['ifconfig', interface, ip, 'netmask', subnet, 'up']
    proc = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

def route_update(gateway):
    command = ['route', 'add', 'default', 'gw', gateway]
    proc = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

def tail(file, lines):
    return tailhead.tail(open(file, 'rb'), lines)


def date():
    # Calculate the offset taking into account daylight saving time
    utc_offset_sec = time.altzone if time.localtime().tm_isdst else time.timezone
    utc_offset = datetime.timedelta(seconds=-utc_offset_sec)
    return datetime.datetime.now().replace(tzinfo=datetime.timezone(offset=utc_offset)).isoformat()