from django.shortcuts import render
from django.utils import timezone
from datetime import timedelta
from smsauth.models import Token
from dbsettings.views import getValue
from kumisms import KumiSMS
import telegram
import random

BUYER = 0
SELLER = 1

def generateToken():
    return str(random.SystemRandom().choice(range(999999))).zfill(6)

def storeToken(token):
    return Token.objects.create(token=token) # pylint: disable=E1101

def useToken(token):
    retval = False
    for t in Token.objects.filter(token=str(token).zfill(6), used=False): # pylint: disable=E1101
        t.used = True
        t.save()
        if timezone.now() - timedelta(seconds=300) < t.sent:
            retval = True
    return retval

def requestToken():
    token = generateToken()
    storeToken(token)
    sendMessage("Bitte verwende diesen Code, um deine Anfrage zu bestätigen: %s" % token, BUYER)

def sendSMS(text, number):
    gateway = KumiSMS(getValue("smsauth.kumisms.key"))
    return gateway.send(number, text)

def sendTelegram(text, recipient):
    bot = telegram.Bot(getValue("smsauth.telegram.token"))
    return bot.send_message(recipient, text)

def sendMessage(text, recipient):
    if recipient == BUYER:
        phone = getValue("smsauth.buyer.phone", getValue("smsauth.recipient", False))
        telegram = getValue("smsauth.buyer.telegram", False)

    elif recipient == SELLER:
        phone = getValue("smsauth.seller.phone", getValue("buyer.recipient", False))
        telegram = getValue("smsauth.seller.telegram", False)
    
    else:
        raise ValueError("Invalid value for recipient: %s" % str(recipient))

    if phone:
        sendSMS(text, phone)

    if telegram:
        sendTelegram(text, telegram)