import praw
import requests


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("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 wrong_dog(bot, update):
    reddit_instance = get_reddit_instance()

    sub = reddit_instance.subreddit('whatswrongwithyourdog')
    post = sub.random()
    update.message.reply_text("This dog has serious issues: %s" % post.url)


def hamster(bot, update):
    reddit_instance = get_reddit_instance()

    sub = reddit_instance.subreddit('hamsters')
    post = sub.random()
    while "image" not in get_post_type(post.url):
        post = sub.random()
    bot.send_photo(chat_id=update.message.chat_id, photo=post.url)


def reddit(bot, update, args):
    if not args:
        update.message.reply_text("Geile, sag sub")
        return
    sub = args[0]
    reddit_instance = get_reddit_instance()

    post = reddit_instance.subreddit(sub).random()
    update.message.reply_text(post.url)