from requests import get, post
from time import sleep


MY_TOKEN = "6229457774:AAHXcF7RwLmAVvLTNy6Owk8xvuY8h2A2TUU"
API_URL_TEMPLATE = "https://api.telegram.org/bot{token}/{method}"

previous_message_amount = len(get(API_URL_TEMPLATE.format(token=MY_TOKEN, method='getUpdates')).json()['result'])


def get_all_users_id_of_new_messages() -> set:
    global previous_message_amount

    updates = get(API_URL_TEMPLATE.format(token=MY_TOKEN, method='getUpdates')).json()
    last_message_amount = len(updates['result'])
    amount_new_messages = last_message_amount - previous_message_amount
    previous_message_amount = last_message_amount

    if amount_new_messages == 0:
        return set()

    return set(message['message']['from']['id'] for message in updates['result'][-amount_new_messages:])


def send_bay_elephant() -> None:

    while True:
        sleep(2)
        users_id = get_all_users_id_of_new_messages()

        for user_id in users_id:
            post(API_URL_TEMPLATE.format(token=MY_TOKEN, method='sendMessage'),
                 data={'chat_id': user_id, 'text': 'Купи слона!'})

send_bay_elephant()