import os
from datetime import datetime
from typing import Any, Dict, List

import praw

from utilities.my_logger import setup_logger

# Setup logging
logger = setup_logger(__name__)

# Get subreddit
subreddit_var = os.getenv("SUBREDDIT")
reddit_pull_limit = int(os.getenv("REDDIT_PULL_LIMIT"))


def get_reddit_instance() -> praw.Reddit:
    """Initialize and return a Reddit instance using PRAW."""
    return praw.Reddit(
            client_id=os.getenv('REDDIT_CLIENT_ID'),
            client_secret=os.getenv('REDDIT_CLIENT_SECRET'),
            user_agent=os.getenv('REDDIT_USER_AGENT'),
            ratelimit_seconds=20,
            )


def extract_submission_data(submission: praw.models.Submission) -> Dict[str, Any]:
    """Extract and return relevant data from a given Reddit submission."""
    return {
        "content": submission.selftext,
        "poster": str(submission.author),
        "date_utc": datetime.utcfromtimestamp(submission.created_utc).strftime('%Y-%m-%d %H:%M:%S'),
        "flair": submission.link_flair_text,
        "title": submission.title,
        "score": submission.ups,
        "permalink": submission.permalink,
        }


def praw_downloader() -> List[Dict[str, str]]:
    """Main function to extract and save all submissions from the subreddit."""
    reddit = get_reddit_instance()
    subreddit = reddit.subreddit(subreddit_var)

    logger.info(f'Starting to fetch submissions from {os.getenv("SUBREDDIT")}.')

    submissions = []
    for submission in subreddit.new(limit=reddit_pull_limit):  # Set limit=None to get all posts
        # logger.debug(f'Processing post {submission.id} - {submission.title}')
        data = extract_submission_data(submission)
        submissions.append(data)

    logger.info(f'Finished downloading {len(submissions)} submissions.')
    return submissions


if __name__ == "__main__":
    praw_downloader()