import random
from os import getenv, environ

import praw

from utils.console import print_step, print_substep
from utils.videos import check_done

TEXT_WHITELIST = set('abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890')


def textify(text):
    return ''.join(filter(TEXT_WHITELIST.__contains__, text))


def get_subreddit_threads():
    """
    Returns a list of threads from the AskReddit subreddit.
    """
    global submission
    print_step("Getting subreddit threads...")

    content = {}
    if getenv("REDDIT_2FA").casefold() == "yes":
        print("\nEnter your two-factor authentication code from your authenticator app.\n")
        code = input("> ")
        print()
        pw = getenv("REDDIT_PASSWORD")
        passkey = f"{pw}:{code}"
    else:
        passkey = getenv("REDDIT_PASSWORD")
    reddit = praw.Reddit(client_id=getenv("REDDIT_CLIENT_ID"), client_secret=getenv("REDDIT_CLIENT_SECRET"),
                         user_agent="Accessing Reddit threads", username=getenv("REDDIT_USERNAME"),
                         passkey=passkey, check_for_async=False,)
    """
    Ask user for subreddit input
    """
    if not getenv("SUBREDDIT"):
        subreddit = reddit.subreddit(
            input("What subreddit would you like to pull from? "))  # if the env isnt set, ask user
    else:
        print_substep(f"Using subreddit: r/{getenv('SUBREDDIT')} from environment variable config")
        subreddit = reddit.subreddit(
            getenv("SUBREDDIT"))  # Allows you to specify in .env. Done for automation purposes.

    if getenv('POST_ID'):
        submission = reddit.submission(id=getenv('POST_ID'))
    else:
        threads = subreddit.hot(limit=25)
        submission = list(threads)[random.randrange(0, 25)]
    submission = check_done(submission)
    if submission is None:
        return get_subreddit_threads()  # submission already done. rerun
    upvotes = submission.score
    ratio = submission.upvote_ratio * 100
    num_comments = submission.num_comments

    print_substep(f"Video will be: {submission.title} :thumbsup:", style='bold green')
    print_substep(f"Thread has " + str(upvotes) + " upvotes", style='bold blue')
    print_substep(f"Thread has a upvote ratio of " + str(ratio) + "%", style='bold blue')
    print_substep(f"Thread has " + str(num_comments) + " comments", style='bold blue')
    environ["VIDEO_TITLE"] = str(textify(submission.title))  # todo use global instend of env vars
    environ["VIDEO_ID"] = str(textify(submission.id))
    try:

        content["thread_url"] = submission.url
        content["thread_title"] = submission.title
        content["comments"] = []

        for top_level_comment in submission.comments:
            if not top_level_comment.stickied:
                if len(top_level_comment.body) <= int(environ["MAX_COMMENT_LENGTH"]):
                    content["comments"].append(
                        {"comment_body": top_level_comment.body, "comment_url": top_level_comment.permalink,
                         "comment_id": top_level_comment.id, })
    except AttributeError as e:
        pass
    print_substep("Received subreddit threads Successfully.", style="bold green")
    return content