#!/usr/bin/env python
# -*- coding: utf-8 -*-

from telegram.ext import Updater, CommandHandler, MessageHandler, Filters
from telegram import ParseMode
import logging
import os
import random
import requests
import datetime
import cat

MENSA_URL = {
    "zentral": "zentralmensa",
    "nord": "nordmensa",
    "turm": "turmmensa"
}

MENSA_NAME = {
    "zentral": "Zentralmensa",
    "nord": "Nordmensa",
    "turm": "Turmmensa"
}

## TODO: rather use filter list, this is bloated; mensa italia missing 
CATEGORIES_LIGHT = {
    "Eintopf",
    "Menü I",
    "Menü II",
    "Vegan",
    "Vegetarisch",
    "Grill III",
    "Al dente",
    "Pasta und Gratins",
    "Kartoffeln und Co.",
    ## Nordmensa:
    "Stamm 1 vegetarisch",
    "Nordmensa-Fit",
    "Stamm 2",
    "Stamm 3",
    ## Turmmensa:
    "Turm vegetarisch Kombi",
    "Turm 2b",
    "Turm 3a",
    "Turm Vegan",
    "Regionale Linie"
}

CATEGORIES_FULL = {
    "Eintopf",
    "Menü I",
    "Menü II",
    "Vegan",
    "Vegetarisch",
    "Grill III",
    "CampusCurry",
    "natürlich fit",
    "Al dente",
    "Pasta und Gratins",
    "Fitnesscenter",
    "Salatbuffet",
    "Studentenfutter",
    "Süße Versuchung",
    "Süße Spezial Tagesangebot",
    "Kartoffeln und Co.",
    "Vollwert & Co. Stärke",
    "Vollwert & Co. Gemüse",
    "Bio-Beilagen",
    "Dessertbuffet",
    "Last Minute ab 14:30 Uhr",
    ## Nordmensa:
    "Stamm 1 vegetarisch",
    "Nordmensa-Fit",
    "Stamm 2",
    "Stamm 3",
    "Salatbuffet/Pastapoint",
    "Last Minute ab 13:30 Uhr",
    ## Turmmensa:
    "Turm vegetarisch Kombi",
    "Turm 2b",
    "Turm 3a",
    "Turm Vegan",
    "Regionale Linie",
    "Beilagen",
    "Last Minute ab 14:00Uhr"
}

MODES = {
    "light" : CATEGORIES_LIGHT,
    "full" : CATEGORIES_FULL
}


# Enable logging
logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
                    level=logging.INFO)

logger = logging.getLogger(__name__)

with open("stoll.txt", "r") as tmp_file:
    STOLL = tmp_file.readlines()

with open("manta.txt", "r") as tmp_file:
    MANTA = tmp_file.readlines()

# Define a few command handlers. These usually take the two arguments bot and
# update. Error handlers also receive the raised TelegramError object in error.
def start(bot, update):
    """Was ist das hier für eins Bot?"""
    update.message.reply_text("""Hallo, ich bin ein Bot.
Ich liefere tolle Informationen über die Mensa. Die Infos kommen von
https://mensa.schneider-hosting.de
Mhmm, lecker. Guten Appetit!""")

def help(bot, update):
    """Send a message when the command /help is issued."""
    update.message.reply_text("""Commands:
*Mensa*:
/mensa _mensa_  - prints filtered list of meals for _mensa_ (if no _mensa_ given, zentralmensa is used)
/mensa _mensa_ full - prints full list of meals for _mensa_ (if no _mensa_ given, zentralmensa is used)
    
*Fun*:
/magie - random Axel Stoll qoute
/manta - random Opel Manta joke

/help - this help text""", parse_mode=ParseMode.MARKDOWN)

def ccat(bot, update):
    """CUTE"""
    catfile = cat.getCat();
    bot.send_photo(chat_id=update.message.chat_id, photo=open(catfile, 'rb'))
    os.remove(catfile)

def magie(bot, update):
    """MAGIEEEEEE"""
    rand = random.SystemRandom()
    update.message.reply_text(STOLL[rand.randrange(0, len(STOLL), 1)])

def manta(bot, update):
    """Boah ey, geile Karre!"""
    rand = random.SystemRandom()
    update.message.reply_text(MANTA[rand.randrange(0, len(MANTA), 1)])

def mensa(bot, update, args):
    which = "zentral"
    categories = CATEGORIES_LIGHT
    for arg in args:
        if arg in MENSA_NAME:
            which = args[0]
        elif arg in MODES:
            categories = MODES[arg]
        else: 
            update.message.reply_text("Falscher Aufruf! RTFM und versuchs nochmal.")
            return

    today = datetime.datetime.now().date().weekday() + 1
    if datetime.datetime.now().time() > datetime.time(hour=16):
        # Es ist zu spät am Tag, zeig das essen für morgen an
        today += 1

    today = today % 7

    url = "https://mensa.schneider-hosting.de/static/%s.%d.json" % (MENSA_URL[which], today)
    request = requests.get(url)
    request.encoding = 'utf-8'
    data = request.json()

    message = "Das Essen für %s in der %s \n" % (data["date"], MENSA_NAME[which])
    
    if len(data["meals"]) > 1:
        for meal in data["meals"]:
            if meal["category"] in categories:
                meal_line = "*%s*\n" % meal["category"]
                meal_line += meal["title"].strip() + "\n"

        # Discord only allows up to 2000 chars per message
                if len(message) + len(meal_line) > 2000:
                    update.message.reply_text(message, parse_mode=ParseMode.MARKDOWN)
                    message = meal_line + "\n"
                else:
                    message += meal_line + "\n"
        update.message.reply_text(message, parse_mode=ParseMode.MARKDOWN)
    else:
        update.message.reply_text("Nix zu futtern heute :(")


def echo(bot, update):
    """Echo the user message."""
    update.message.reply_text(update.message.text)


def error(bot, update, error):
    """Log Errors caused by Updates."""
    logger.warning('Update "%s" caused error "%s"', update, error)


def main():
    """Start the bot."""
    # Create the EventHandler and pass it your bot's token.
    token = open("token").read()
    updater = Updater(token.strip())

    # Get the dispatcher to register handlers
    dp = updater.dispatcher

    # on different commands - answer in Telegram
    dp.add_handler(CommandHandler("start", start))
    dp.add_handler(CommandHandler("help", help))
    dp.add_handler(CommandHandler("magie", magie))
    dp.add_handler(CommandHandler("manta", manta))
    dp.add_handler(CommandHandler("mensa", mensa, pass_args=True))
    dp.add_handler(CommandHandler("cat", ccat))


    # log all errors
    dp.add_error_handler(error)

    # Start the Bot
    updater.start_polling()

    # Run the bot until you press Ctrl-C or the process receives SIGINT,
    # SIGTERM or SIGABRT. This should be used most of the time, since
    # start_polling() is non-blocking and will stop the bot gracefully.
    updater.idle()


if __name__ == '__main__':
    main()