from pyspark.sql import functions as f
from pyspark.sql import SparkSession
from pyspark.sql import Window
from similarities_helper import build_tfidf_dataset

## TODO:need to exclude automoderator / bot posts.
## TODO:need to exclude better handle hyperlinks. 

spark = SparkSession.builder.getOrCreate()
df = spark.read.parquet("/gscratch/comdata/output/reddit_ngrams/comment_terms.parquet")

include_subs = pd.read_csv("/gscratch/comdata/output/reddit_similarity/subreddits_by_num_comments.csv")
include_subs = set(include_subs.loc[include_subs.comments_rank <= 25000]['subreddit'])

df = build_tfidf_dataset(df, include_subs, 'term')

df.write.parquet('/gscratch/comdata/output/reddit_similarity/reddit_similarity/subreddit_terms.parquet',mode='overwrite',compression='snappy')
spark.stop()