#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import telegram
import configparser
from telegram.error import NetworkError, Unauthorized
from time import sleep
from sys import argv


config = []
parser = configparser.SafeConfigParser()

if len(argv) == 2:
    parser.read(argv[1])
else:
    parser.read('config.ini')

for name, value in parser.items('config'):
    config.append(value)

bot = telegram.Bot(config[4])

update_id = 0
print('It can take a while to print the ID, please wait.')
print("Press Ctrl-c when the ID you want is printed.")

printed = []

while True:
    try:
        for update in bot.getUpdates(offset=update_id, timeout=10):
            chat_id = update.message.chat_id
            chat_title = update.message
            if chat_id not in printed:
                printed.append(chat_id)
                print("Title: " + str(chat_title['chat']['title']))
                print("ID: " + str(chat_id))
    except NetworkError:
        sleep(1)
    except Unauthorized:
        update_id += 1