#!/usr/bin/env python3

import hackchat
import subprocess
import threading

# call "dc", eval the expression and return the result
def eval(expr):
    print(expr)
    proc = subprocess.Popen(
        ['dc'],stdout=subprocess.PIPE,
        stdin=subprocess.PIPE,
        stderr=subprocess.PIPE)
    proc.stdin.write((expr + '\n').encode("iso-8859-1"))
    proc.stdin.close()
    result = proc.stderr.read().decode("iso-8859-1").strip()
    result = result + "\n" + proc.stdout.read().decode("iso-8859-1").strip()
    print(result)
    return result

# called when a message was received
def message_got(chat, message, sender):
    print(message)
    if message.split()[0]==".dc":
        chat.send_message(eval(message[3:]))

def thread_function(name):
    x = input()
    chat.send_message(x)

x = threading.Thread(target=thread_function, args=(1,))
x.start()

# create new bot
chat = hackchat.HackChat("dcbot", "programming")
chat.on_message += [message_got]
chat.run()