from tweepy import API
from tweepy import Cursor
from tweepy.streaming import StreamListener
from tweepy import OAuthHandler
from tweepy import Stream
 
import twitter_credentials
import numpy as np
import pandas as pd


# # # # TWITTER CLIENT # # # #
class TwitterClient():
    def __init__(self, twitter_user=None):
        self.auth = TwitterAuthenticator().authenticate_twitter_app()
        self.twitter_client = API(self.auth)

        self.twitter_user = twitter_user

    def get_twitter_client_api(self):
        return self.twitter_client

    def get_tweets(self, hash_tag, num_tweets):
        tweets = []
        for tweet in Cursor(self.twitter_client.search, q=hash_tag).items(num_tweets):
            tweets.append(tweet)
        return tweets


# # # # TWITTER AUTHENTICATER # # # #
class TwitterAuthenticator():

    def authenticate_twitter_app(self):
        auth = OAuthHandler(twitter_credentials.CONSUMER_KEY, twitter_credentials.CONSUMER_SECRET)
        auth.set_access_token(twitter_credentials.ACCESS_TOKEN, twitter_credentials.ACCESS_TOKEN_SECRET)
        return auth

class TweetAnalyzer():
    """
    Functionality for analyzing and categorizing content from tweets.
    """
    def tweets_to_data_frame(self, tweets):
        df = pd.DataFrame(data=[tweet.text for tweet in tweets], columns=['Tweets'])

        df['id'] = np.array([tweet.id for tweet in tweets])
        df['geo'] = np.array([tweet.geo for tweet in tweets])
        df['date'] = np.array([tweet.created_at for tweet in tweets])
        df['len_of_tweet'] = np.array([len(tweet.text) for tweet in tweets])
        df['likes'] = np.array([tweet.favorite_count for tweet in tweets])
        df['retweets'] = np.array([tweet.retweet_count for tweet in tweets])
        df['source'] = np.array([tweet.source for tweet in tweets])

        return df


# # # # TWITTER STREAMER # # # #
class TwitterStreamer():
    """
    Unused ATM
    Class for streaming and processing live tweets.
    """

    def __init__(self):
        self.twitter_autenticator = TwitterAuthenticator()

    def stream_tweets(self, fetched_tweets_filename, hash_tag_list):
        # This handles Twitter authetification and the connection to Twitter Streaming API
        listener = TwitterListener(fetched_tweets_filename)
        auth = self.twitter_autenticator.authenticate_twitter_app()
        stream = Stream(auth, listener)

        # This line filter Twitter Streams to capture data by the keywords:
        stream.filter(track=hash_tag_list)


# # # # TWITTER STREAM LISTENER # # # #
class TwitterListener(StreamListener):
    """
    Unused ATM
    This is a basic listener that just prints received tweets to a fetched_tweets_filename.
    """

    def __init__(self, fetched_tweets_filename):
        self.fetched_tweets_filename = fetched_tweets_filename

    def on_data(self, data):
        try:
            print(data)
            with open(self.fetched_tweets_filename, 'a') as tf:
                tf.write(data)
            return True
        except BaseException as e:
            print("Error on_data %s" % str(e))
        return True

    def on_error(self, status):
        if status == 420:
            # Returning False on_data method in case rate limit occurs.
            return False
        print(status)
 
if __name__ == '__main__':

    twitter_client = TwitterClient()
    tweet_analyzer = TweetAnalyzer()

    api = twitter_client.get_twitter_client_api()

    tweets = twitter_client.get_tweets('COVID-19', 100)

    df = tweet_analyzer.tweets_to_data_frame(tweets)
    
    print(df.head(10))