import praw
import random
import time
import datetime

# this is the login information for our bot
username=''
password=''
client_id=''
client_secret=''

# connect to reddit 
reddit = praw.Reddit(
    client_id=client_id,
    client_secret=client_secret,
    user_agent=username,
    username=username,
    password=password,
    )

def refresh_comments():
    print('refresh_comments... ')
    global current_comment
    global long_comments

    all_comments = []
    for subreddit in [reddit.subreddit('politics'), reddit.subreddit('conservative')]:
        for submission in subreddit.top(time_filter='day', limit=10):
            submission_comments = submission.comments.list()
            real_comments = [comment for comment in submission_comments if isinstance(comment, praw.models.Comment)]
            all_comments += real_comments
    all_comments.sort(key=lambda comment: comment.score, reverse=True)
    long_comments=[]
    for comment in all_comments:
        if len(str(comment.body))>500 and '>' not in comment.body:
            long_comments.append(comment)
    current_comment=0
    print("  len(long_comments)=",len(long_comments))
    print("  current_comment=",current_comment)

def generate_comment(comment):
    global current_comment
    global long_comments
    # generate a simple reply that supports a political candidate
    try:
        plagiarized_comment=long_comments[current_comment]
    except (NameError,KeyError):
        refresh_comments()
        return

    text_politics=plagiarized_comment.body
    current_comment+=1

    # add a message explaining that this is a bot
    # this text uses a special language called reddit-flavored markdown to stylize
    # a message declaring that it was sent by a bot.  All messages you post should
    # include this text at the bottom.
    # For more details about reddit-flavored markdown, see 
    # https://www.reddit.com/r/reddit.com/comments/6ewgt/reddit_markdown_primer_or_how_do_you_do_all_that/
    text_disclaimer='''

*****
BEEP. BOOP. I plagiarized this comment from '''+plagiarized_comment.permalink+'''
    '''

    # send the comment to reddit
    try:
        text=text_politics +text_disclaimer
        print('text=',text)
        comment.reply(text)
        print('reply sent')

        # sleep for 5-10 minutes so that we don't overload reddit
        time.sleep(10*60+random.randrange(5*60))

    except Exception as e:
        print('ERROR:',e)
        time.sleep(10*60)

# in an infinite loop, we will look for comment in the post that we can reply to
while True:
    print()
    print('new iteration at:',datetime.datetime.now())

    # get list of the newest submissions
    submissions=list(reddit.subreddit('csci040').new(limit=10))
    print('len(submissions)=',len(submissions))

    '''
    # check if there's a submission without a comment from us
    for submission in submissions:
        has_comment=False
        for comment in submission.comments:
            if comment.author==username:
                has_comment=True
        if not has_comment:
            generate_comment(submission)

    # FIXME: delete this line
    #submissions = [reddit.submission(url='https://www.reddit.com/r/csci040/comments/dw53wt/political_discussion_thread/')]
    time.sleep(3)
    continue
    '''

    # get a list of all of the comments in the newest submissions
    # we also include the submissions in this list so that we can make 
    # top-level comments
    all_comments=[]
    submission = random.choice(submissions)
    #for submission in submissions:
    print('  submission=',submission)
    all_comments+=submission.comments.list()
    print('len(all_comments)=',len(all_comments))

    # next filter that list to remove comments that were generated by this bot
    not_my_comments=[]
    for comment in all_comments:
        try:
            if comment.author!=username:
                not_my_comments.append(comment)
        except AttributeError:
            pass
    print('len(not_my_comments)=',len(not_my_comments))

    # next filter the list to also remove comments that we've already replied to
    comments_without_replies=[]
    for comment in not_my_comments:
        replies=list(comment.replies)
        have_replied=False
        for reply in replies:
            try:
                if reply.author==username:
                    have_replied=True
            except AttributeError:
                pass
        if not have_replied:
            comments_without_replies.append(comment)
    print('len(comments_without_replies)=',len(comments_without_replies))

    # randomly select one of the comments that we haven't replied to yet
    # and reply
    try:
        comment=random.choice(comments_without_replies)
        generate_comment(comment)
    except IndexError:
        if len(all_comments)==len(not_my_comments):
            generate_comment(submission)
        else:
            print('no comment generated')