from dotenv import load_dotenv
from os import environ
from tweepy import OAuthHandler, API, StreamListener, Stream
from re import sub
from random import choice
from datetime import datetime
from pytz import timezone

def load(variables):
    """Load env variables."""
    keys = {}
    load_dotenv() # load .env file
    for var in variables:
        try:
            keys[var] = environ[var]
        except KeyError:
            print(f"Please set the environment variable {var} (.env file supported)")
            exit(1)
    return keys

class Listener(StreamListener):
    def __init__(self, api = None):
        super(Listener, self).__init__()
        self.api = api

    def on_status(self, status):
        """Answer to tweets."""
        if seniority(status._json["created_at"]):
            tweetText = sub(r'https?:\/\/\S+| +?\?|\?| +?\!| ?\!', '', status._json["text"])
            if tweetText.endswith(tuple(quoi)):
                if status._json["user"]["screen_name"] in friends:
                    try:
                        self.api.update_status(status = choice(feur), in_reply_to_status_id = status._json["id"], auto_populate_reply_metadata = True)
                        print(f"{status._json['user']['screen_name']} est passé au coiffeur !")
                    except Exception as error:
                        print(f"Error happens! {error}")
                        pass

def seniority(date: str):
    datetimeObject = datetime.strptime(date, '%a %b %d %H:%M:%S +0000 %Y') # Convert String format to datetime format
    datetimeObject = datetimeObject.replace(tzinfo = timezone('UTC')) # Twitter give us an UTC time
    age = datetime.now(timezone('UTC')) - datetimeObject # Time now in UTC minus the time we got to get the age of the date
    return False if age.days >= 1 else True # False if older than a day

def permute(array: list):
    quoi = []

    for text in array: # all element of the list
        n = len(text)
        mx = 1 << n # Number of permutations is 2^n
        text = text.lower() # Converting string to lower case

        for i in range(mx): # Using all subsequences and permuting them
            combination = [k for k in text]
            for j in range(n):
                if (((i >> j) & 1) == 1): # If j-th bit is set, we convert it to upper case
                    combination[j] = text[j].upper()

            temp = ""
            for i in combination:
                temp += i
            quoi.append(temp)

    return quoi

def main(accessToken, accessTokenSecret, consumerKey, consumerSecret, user):
    """Main method."""
    auth = OAuthHandler(consumerKey, consumerSecret)
    auth.set_access_token(accessToken, accessTokenSecret)
    
    api = API(auth)

    listener = Listener(api)
    stream = Stream(auth = api.auth, listener = listener)

    for friend in api.friends(user, skip_status = True):
        friends.append(friend._json["screen_name"])

    print(f"Scroll sur Twitter avec les abonnements de @{user}...")
    stream.filter(track = quoi, languages = ["fr"], is_async = True)

if __name__ == '__main__':
    """
    TOKEN is the Access Token available in the Authentication Tokens section under Access Token and Secret sub-heading.
    TOKEN_SECRET is the Access Token Secret available in the Authentication Tokens section under Access Token and Secret sub-heading.
    CONSUMER_KEY is the API Key available in the Consumer Keys section.
    CONSUMER_SECRET is the API Secret Key available in the Consumer Keys section.
    --
    PSEUDO is the PSEUDO of the account you want to listen to snipe. A proportion of who s.he follow will be targeted.
    """
    quoi = permute(["quoi", "koi"])
    feur = ["feur", "(feur)", "FEUR", "feur lol"]
    friends = []
    keys = load(["TOKEN", "TOKEN_SECRET", "CONSUMER_KEY", "CONSUMER_SECRET", "PSEUDO"])
    main(keys["TOKEN"], keys["TOKEN_SECRET"], keys["CONSUMER_KEY"], keys["CONSUMER_SECRET"], keys["PSEUDO"])