import csv
import json
import os
import praw
import random
import re
import sys

env = json.load(open('.env', 'r'))
#print(env)

reddit = praw.Reddit(
    client_id=env["app_id"],
    client_secret=env["secret"],
    user_agent=env["user_agent"]
)

def main(post_id):
    post = reddit.submission(id=post_id)
    post.comments.replace_more(limit=0)
    sorted_comments = sorted(post.comments, key=lambda c: c.score, reverse=True)

    if post.link_flair_text is None:
        raise Exception("Must be a gender or non-binary fashion flair post")
    elif "Men's" in post.link_flair_text:
        gender = "M"
    elif "Women's" in post.link_flair_text or "Ladies'" in post.link_flair_text:
        gender = "F"
    elif "Non Binary" in post.link_flair_text:
        gender = "X"
    else:
        raise Exception("Must be a gender or non-binary fashion flair post")

    data = {
        "post_id": post_id,
        "gender_flair": gender,
        "title": post.title,
        "selftext": post.selftext,
        "images": [],
    }

    image_urls = []
    if post.is_gallery:
        metadata = post.media_metadata
        for item in post.gallery_data['items']:
            url = metadata[item['media_id']]['s']['u'].replace("&", "&")
            image_urls.append(url)
    else:
        raise Exception("Need multiple images for there to be a multimodal eval question")

    lead_choices = {}
    firstChoice = None
    secondChoice = None
    for c in sorted_comments:
        text = c.body.strip().lower().replace('first', '1st').replace('second', '2nd').replace('third', '3rd').replace('fourth', '4th').replace('fifth', '5th')
        text = text.replace('last', str(len(image_urls)))
        selections = re.findall(r'\d', text)
        if len(selections) == 0:
            print("Skipped comment without digit")
            continue
        elif len(set(selections)) > 1:
            print(text)
            raise Exception("Encountered a top comment with multiple digits, complex")
        selection = int(selections[0])
        if selection not in lead_choices:
            print(f"Found comment with {c.score} votes: {text}")
            lead_choices[selection] = c.score
            data["images"].append(image_urls[selection - 1])
            if firstChoice is None:
                firstChoice = selection
            elif secondChoice is None:
                secondChoice = selection
                break
        else:
            print(f"Found repeat comment with {c.score} votes")
            lead_choices[selection] += c.score
            if lead_choices[selection] > 100:
                print("Overwhelming support")
                if selection == 1:
                   secondChoice = 2
                else:
                   secondChoice = selection - 1
                lead_choices[secondChoice] = 1
                data["images"].append(image_urls[secondChoice - 1])
                break
    if len(lead_choices.keys()) != 2:
        raise Exception("Did not find two distinct comments with single outfit suggestions")

    data["firstChoiceVotes"] = lead_choices[firstChoice]
    data["secondChoice"] = lead_choices[secondChoice]
    if len(image_urls) > 2:
        print("We are assuming that there is one image of each outfit")
        used_set = set(image_urls)
        remaining = [img for img in used_set if img not in data["images"]]
        extra_images = random.sample(remaining, min(len(remaining), 2))
        data["images"] += extra_images

    # print(json.dumps(data, indent=2))
    fieldnames = [
        "post_id",
        "gender_flair",
        "title",
        "selftext",
        "images",
        "firstChoiceVotes",
        "secondChoice"
    ]

    filename = "dataset.csv"
    file_exists = os.path.isfile(filename)
    with open(filename, mode="a", newline="", encoding="utf-8") as f:
        writer = csv.DictWriter(f, fieldnames=fieldnames)
        if not file_exists:
            writer.writeheader()
        row = data.copy()
        row["images"] = ",".join(data["images"])
        writer.writerow(row)


if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python outfit_scraper.py <reddit_post_id>")
        sys.exit(1)
    main(sys.argv[1])