import praw
import requests
from prawcore import exceptions
from telegram import Update
from telegram.ext import CallbackContext

four_twenty_groups = []


def get_post_type(url):
    header = requests.head(url).headers
    if 'Content-Type' in header:
        return header['Content-Type']
    else:
        return ''


def get_reddit_instance():
    reddit_config = {}
    with open("config/reddit_config") as tmp_file:
        for line in tmp_file:
            (key, val) = line.split('=')
            reddit_config[key] = val.replace('\n', '')

    return praw.Reddit(
        user_agent=reddit_config['user_agent'],
        client_id=reddit_config['client_id'],
        client_secret=reddit_config['client_secret']
    )


def get_reddit_post(sub, is_image_post=False):
    reddit_instance = get_reddit_instance()

    try:
        sub = reddit_instance.subreddit(sub)
        post = sub.random()

    except exceptions.NotFound:
        return "Ungültiges Sub :("
    except exceptions.Forbidden:
        return "Privates/Gesperrtes Sub :("
    except Exception as e:
        return e

    if post is None:
        return "Random geht in diesem Sub leider nicht :("

    if is_image_post:
        tries = 0
        while "image" not in get_post_type(post.url) and tries < 5:
            post = sub.random()
            tries += 1
        if tries >= 5:
            return "Keine Bilder gefunden (über 5 Fehlversuche)"

    return post


def wrong_dog(update: Update, context: CallbackContext):
    context.args = ['whatswrongwithyourdog']
    reddit_img(update, context)


def hamster(update: Update, context: CallbackContext):
    context.args = ['hamsters']
    reddit_img(update, context)


def drillcat(update: Update, context: CallbackContext):
    context.args = ['drillcats']
    reddit_img(update, context)


def cat(update: Update, context: CallbackContext):
    context.args = ['catpictures']
    reddit_img(update, context)


def dog(update: Update, context: CallbackContext):
    context.args = ['dogpictures']
    reddit_img(update, context)


def reddit(update: Update, context: CallbackContext):
    if not context.args:
        update.message.reply_text("Bitte Sub angeben")
        return

    sub = context.args[0]
    update.message.reply_text(get_reddit_post(sub).url)


def reddit_img(update: Update, context: CallbackContext):
    if not context.args:
        update.message.reply_text("Bitte Sub angeben")
        return
    sub = context.args[0]
    post = get_reddit_post(sub, True)

    try:
        context.bot.send_photo(chat_id=update.message.chat_id, photo=post.url)
        return
    except AttributeError:
        update.message.reply_text(post)
        print("ERROR")