import re
import random
import praw
import copy
import pandas as pd
import numpy as np

reddit = praw.Reddit(client_id = 'client_id',
                     client_secret = 'client_secret',
                     user_agent = 'user_agent',
                     username = 'username',
                     password = 'password')

submission = reddit.submission(id='7oe8x8') #get submission object
submission.comments.replace_more(limit=None)

#get all top level comments and parse for game IDs
entries = list()
for top_level_comment in submission.comments:
    ids = re.findall('(GM\d{3})',top_level_comment.body, re.IGNORECASE)
    ids[:] = [x.upper() for x in ids]
    ids.insert(0, top_level_comment.author)
    entries.append(ids)

# choose the winners
winners = list()
exhausted = list()

while (len(exhausted) < 154): #all games must go
    entries_selection = copy.deepcopy(entries)

    for sublist in entries_selection: #remove IDs for games that already have a winner
        sublist[:] = [x for x in sublist if x not in exhausted]

    entries_selection[:] = [x for x in entries_selection if len(x) != 1] #removes entries without valid games

    while (len(entries_selection) > 0):
        winner_index = random.randint(0,len(entries_selection)-1) #choose a random winner
        winners.append(entries_selection[winner_index][0:2]) #add winner name and game to list
        exhausted.append(entries_selection[winner_index][1]) #add won game to list

        del entries_selection[winner_index] #remove winner for this round

        for sublist in entries_selection: #remove IDs for games that already have a winner
            sublist[:] = [x for x in sublist if x not in exhausted]

        entries_selection[:] = [x for x in entries_selection if len(x) != 1] #removes entries without valid games

df = pd.read_csv('game_keys.csv') #csv with game title and key

#make a df with the winners and key
winners_df = pd.DataFrame(winners, columns=['User', 'ID'])
winners_df = winners_df.merge(df, how='left', on='ID')

#send winners pm with key
for row in winners_df.itertuples():
    body = 'Congradulaions!! \n\nYou won {}: {} \n\nKey: {} \n\nEnjoy!!'.format(row[2], row[3], row[4])
    reddit.redditor(str(row[1])).message('Giveaway Winner!', body)