'''
A telegram bot api for whatever purposes.
TODO: kaehmy app is definitely not correct place for this
'''
import logging
import requests
from django.conf import settings
from kaehmy.models import TelegramChannel


class TelegramBot:
    '''
    A telegram bot api for whatever purposes
    Currently only able to broadcast stuff to all registered
    channels using broadcast method.
    '''

    def __init__(self, api_token=None):

        self.api_token = api_token or settings.TELEGRAM_BOT_TOKEN
        self.send_message_url = "https://api.telegram.org/bot{}/sendMessage".format(self.api_token)

    def broadcast(self, message):
        channels_ids = TelegramChannel.objects.values_list("channel_id", flat=True)
        for id_ in channels_ids:
            self.send_message(id_, message)

    def send_message(self, channel_id, message):
        '''
        Send message to a chat with given channel_id
        '''
        data = {
            'chat_id': channel_id,
            'text': message,
            'parse_mode': 'Markdown'
        }
        resp = requests.post(self.send_message_url, json=data)
        logging.debug(resp.content)