#!/usr/env python

import sys, argparse, traceback
import time

# Make a globally accessible bot instance
bot = None

# Try to import telepot
# If not installed, inform user and fail gracefully
try:
	import telepot
except:
	print("radiodiodibot needs the telepot module to communicate with Telegram.")
	print("Please install telepot before using radiodiodibot.")
	sys.exit()

def handle(msg):
    content_type, chat_type, chat_id = telepot.glance(msg)
    print(content_type, chat_type, chat_id)

    if content_type == 'text':
        bot.sendMessage(chat_id, "Radio palaa keväällä 2017!")

# Entry point
def main():

    global bot

    # Get the bot token as an argument from the user
    parser = argparse.ArgumentParser(description="Telegram bot for the Radiodiodi Student Radio broadcast.")
    parser.add_argument("telegram_bot_token")
    args = parser.parse_args()

    token = args.telegram_bot_token
    
    # Attempt to create a bot with telepot
    try:
        print("Creating bot listener with token {}...".format(token))
        bot = telepot.Bot(token)
        print("Bot succesfully created.")
    except:
        traceback.print_exc()
        print("Error creating bot listener. radiodiodibot will now exit...")
        return

    # Try fetching bot information from Telegram to check connection
    try:
	    print("Bot info: {}".format(bot.getMe()))
    except:
            print("Could not fetch bot info. Check your token and connectivity to Telegram!")
            return

    bot.message_loop(handle)
    print("Listening for messages...")
    while True:
        time.sleep(10)


if __name__ == "__main__":
    main()