#!/usr/bin/env python3

import os
import sys
from typing import List, Tuple
import tweepy
from time import sleep
from random import shuffle

# Return our credentials from environment variables as UTF-8 bytes.
def get_arguments() -> Tuple[bytes, bytes, bytes, bytes]:
    consumer_key: bytes = os.environ['CONSUMER_KEY'].encode('utf8')
    consumer_secret: bytes = os.environ['CONSUMER_SECRET'].encode('utf8')
    access_token: bytes = os.environ['ACCESS_TOKEN'].encode('utf8')
    access_token_secret: bytes = os.environ['ACCESS_TOKEN_SECRET'].encode('utf8')

    return consumer_key, consumer_secret, access_token, access_token_secret


# Copy the file lines to a new List[str] and shuffle it.
def populate_array(file_lines: List[str]) -> List[str]:
    array: List[str] = file_lines.copy()

    # Scramble like an egg.
    shuffle(array)

    return array


# Main function.
def main() -> None:
    consumer_key: bytes
    consumer_secret: bytes
    access_token: bytes
    access_token_secret: bytes

    # Access and set authentication method to our Twitter credentials.
    consumer_key, consumer_secret, access_token, access_token_secret = get_arguments()
    auth: tweepy.OAuth1UserHandler = tweepy.OAuth1UserHandler(consumer_key=consumer_key, consumer_secret=consumer_secret,
                                                              access_token=access_token, access_token_secret=access_token_secret)
    
    # Creating an API object with our authentication method.
    api: tweepy.API = tweepy.API(auth=auth)

    array: List[str]
    with open('./everybody.txt', 'r', encoding='utf-8') as my_file:
        # Read lines one by one from my_file and assign to file_lines variable
        file_lines: List[str] = [x.strip() for x in my_file.readlines()]

        # Close file.
        my_file.close()

        # Create List[str] from file_lines.
        array = populate_array(file_lines)

    # Driving loop.
    while True:
        while array:
            # Grab last element and then remove it.
            tweet: str = array.pop()

            try:
                # Output the last element, which will be the tweet.
                print(tweet)

                # Create a tweet through the API.
                api.update_status(tweet)

                # Chill out for 1800 seconds.
                sleep(1800)
            except tweepy.Forbidden as fe:
                # We probably tried to create a duplicate tweet, but say what happened.
                print(fe.api_errors)

                # Chill out for 30 seconds.
                sleep(30)
            except tweepy.BadRequest as be:
                # Something is wrong with our client, so say what happened.
                print(be.api_errors)

                # Bail. We shouldn't keep trying.
                sys.exit(1)
            except tweepy.TweepyException as te:
                # Something very unexpected happened, so say what happened.
                print(te)

                # Bail. We shouldn't keep trying.
                sys.exit(1)

        # Let's do the time warp again.
        array = populate_array(file_lines)


# Do not delete.
if __name__ == '__main__':
    main()