bot = Bot(token)


def run():
    """ Runs the function used to start the bot.
    """

    MessageLoop(bot,
                { 'chat': on_chat_message }
                ).run_as_thread()

    print('Listening ...')

    while 1:
        time.sleep(10)

####################################################################

def help(bot, chat_id):
    bot.sendMessage(chat_id, 'Available commands:')
    bot.sendMessage(chat_id, '/exec    Execute remote command')

####################################################################

def run_command(command):
    p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    return p.stdout.read().decode('utf-8')

####################################################################

def on_chat_message(msg):
    """ Manages the predefined commands of the telegram bot.

    :param msg: message received from telegram.
    """

    #print(msg)
    content_type, chat_type, chat_id = glance(msg)

    #
    # Check if the content_type of the message is a text
    if content_type == 'text':
        txt = msg['text'].lower()

        #
        # Switch construct to manage the various commands
        if txt.startswith("/exec"):
            cmd = txt[6:]
            bot.sendMessage(chat_id, 'Executing command ['+cmd+']...')
            bot.sendMessage(chat_id, run_command(cmd.split(' ')))
        else:
            help(bot, chat_id)

run()