# foodie_automator_reddit.py
import requests
import random
import time
import logging
import os
import json
import signal
import sys
import re
from duckduckgo_search import DDGS
from datetime import datetime, timedelta, timezone
from openai import OpenAI
from urllib.parse import quote
from requests.packages.urllib3.util.retry import Retry
from requests.adapters import HTTPAdapter
import praw
from dotenv import load_dotenv
from foodie_config import (
    AUTHORS, RECIPE_KEYWORDS, PROMO_KEYWORDS, HOME_KEYWORDS, PRODUCT_KEYWORDS,
    PERSONA_CONFIGS, CATEGORIES, get_clean_source_name,
    REDDIT_CLIENT_ID, REDDIT_CLIENT_SECRET, REDDIT_USER_AGENT, LIGHT_TASK_MODEL,
    X_API_CREDENTIALS
)
from foodie_utils import (
    load_json_file, save_json_file, get_image, generate_image_query,
    upload_image_to_wp, determine_paragraph_count, insert_link_naturally,
    is_interesting, generate_title_from_summary, summarize_with_gpt4o,
    generate_category_from_summary, post_to_wp, prepare_post_data,
    select_best_author, smart_image_and_filter, get_flickr_image,
    get_next_author_round_robin, check_author_rate_limit, update_system_activity
)
from foodie_hooks import get_dynamic_hook, get_viral_share_prompt
import fcntl

load_dotenv()

SCRIPT_NAME = "foodie_automator_reddit"

is_posting = False
LOCK_FILE = "/home/shane/foodie_automator/locks/foodie_automator_reddit.lock"

def signal_handler(sig, frame):
    logging.info("Received termination signal, marking script as stopped...")
    update_system_activity(SCRIPT_NAME, "stopped")
    if is_posting:
        logging.info("Currently posting, will exit after completion.")
    else:
        logging.info("Safe to exit immediately.")
        sys.exit(0)

signal.signal(signal.SIGTERM, signal_handler)
signal.signal(signal.SIGINT, signal_handler)

LOG_FILE = "/home/shane/foodie_automator/logs/foodie_automator_reddit.log"
LOG_PRUNE_DAYS = 30
MAX_RETRIES = 3
RETRY_BACKOFF = 2

POSTED_TITLES_FILE = '/home/shane/foodie_automator/posted_reddit_titles.json'
USED_IMAGES_FILE = '/home/shane/foodie_automator/used_images.json'
EXPIRATION_HOURS = 24
IMAGE_EXPIRATION_DAYS = 7

posted_titles_data = load_json_file(POSTED_TITLES_FILE, EXPIRATION_HOURS)
posted_titles = set(entry["title"] for entry in posted_titles_data if "title" in entry)
used_images_data = load_json_file(USED_IMAGES_FILE, IMAGE_EXPIRATION_DAYS)
used_images = set(entry["title"] for entry in used_images_data if "title" in entry)

client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))

def setup_logging():
    try:
        # Ensure log directory exists
        os.makedirs(os.path.dirname(LOG_FILE), exist_ok=True)
        logging.debug(f"Log directory created/verified: {os.path.dirname(LOG_FILE)}")
        
        # Check write permissions
        if not os.access(os.path.dirname(LOG_FILE), os.W_OK):
            raise PermissionError(f"No write permission for {os.path.dirname(LOG_FILE)}")
        
        # Test write to log file
        try:
            with open(LOG_FILE, 'a') as f:
                f.write("")
            logging.debug(f"Confirmed write access to {LOG_FILE}")
        except Exception as e:
            raise PermissionError(f"Cannot write to {LOG_FILE}: {e}")

        # Prune old logs
        if os.path.exists(LOG_FILE):
            with open(LOG_FILE, 'r') as f:
                lines = f.readlines()
            
            log_entries = []
            current_entry = []
            timestamp_pattern = re.compile(r'^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2},\d{3}')
            
            for line in lines:
                if timestamp_pattern.match(line):
                    if current_entry:
                        log_entries.append(''.join(current_entry))
                    current_entry = [line]
                else:
                    current_entry.append(line)
            
            if current_entry:
                log_entries.append(''.join(current_entry))
            
            cutoff = datetime.now(timezone.utc) - timedelta(days=LOG_PRUNE_DAYS)
            pruned_entries = []
            for entry in log_entries:
                try:
                    timestamp = datetime.strptime(entry[:19], '%Y-%m-%d %H:%M:%S').replace(tzinfo=timezone.utc)
                    if timestamp > cutoff:
                        pruned_entries.append(entry)
                except ValueError:
                    logging.warning(f"Skipping malformed log entry (no timestamp): {entry[:50]}...")
                    continue
            
            with open(LOG_FILE, 'w') as f:
                f.writelines(pruned_entries)
            logging.debug(f"Log file pruned: {LOG_FILE}")
        
        # Configure logging
        logging.basicConfig(
            filename=LOG_FILE,
            level=logging.INFO,
            format="%(asctime)s - %(levelname)s - %(message)s",
            datefmt="%Y-%m-%d %H:%M:%S",
            force=True  # Ensure this config takes precedence
        )
        logging.getLogger("requests").setLevel(logging.WARNING)
        logging.getLogger("prawcore").setLevel(logging.WARNING)
        console_handler = logging.StreamHandler()
        console_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
        logging.getLogger().addHandler(console_handler)
        logging.info("Logging initialized for foodie_automator_reddit.py")
    
    except Exception as e:
        # Fallback to console logging if file logging fails
        logging.basicConfig(
            level=logging.INFO,
            format="%(asctime)s - %(levelname)s - %(message)s",
            datefmt="%Y-%m-%d %H:%M:%S",
            force=True
        )
        logging.error(f"Failed to setup file logging for {LOG_FILE}: {e}. Using console logging.")
        console_handler = logging.StreamHandler()
        console_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
        logging.getLogger().addHandler(console_handler)
        logging.info("Console logging initialized as fallback for foodie_automator_reddit.py")

def acquire_lock():
    os.makedirs(os.path.dirname(LOCK_FILE), exist_ok=True)
    lock_fd = open(LOCK_FILE, 'w')
    try:
        fcntl.flock(lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
        lock_fd.write(str(os.getpid()))
        lock_fd.flush()
        return lock_fd
    except IOError:
        logging.info("Another instance of foodie_automator_reddit.py is running")
        sys.exit(0)

def clean_reddit_title(title):
    """Clean Reddit post title by removing prefixes, newlines, and special characters."""
    if not title or not isinstance(title, str):
        logging.warning(f"Invalid title received: {title}")
        return ""
    # Remove [prefixes], newlines, and excessive whitespace
    cleaned_title = re.sub(r'^\[.*?\]\s*', '', title)  # Remove [prefix]
    cleaned_title = re.sub(r'\n+', ' ', cleaned_title)  # Replace newlines with space
    cleaned_title = re.sub(r'\s+', ' ', cleaned_title).strip()  # Normalize spaces
    # Remove special characters (keep alphanumeric, spaces, and basic punctuation)
    cleaned_title = re.sub(r'[^\w\s.,!?-]', '', cleaned_title)
    logging.info(f"Cleaned Reddit title from '{title}' to '{cleaned_title}'")
    return cleaned_title

def is_interesting_reddit(title, summary, upvotes, comment_count, top_comments):
    for attempt in range(MAX_RETRIES):
        try:
            content = f"Title: {title}\n\nContent: {summary}"
            if top_comments:
                content += f"\n\nTop Comments:\n{'\n'.join(top_comments)}"
            
            response = client.chat.completions.create(
                model=LIGHT_TASK_MODEL,
                messages=[
                    {"role": "system", "content": (
                        "Rate this Reddit post from 0-10 based on rarity, buzzworthiness, and engagement potential for food lovers, covering food topics (skip recipes). "
                        "Score 8-10 for rare, highly shareable ideas (e.g., unique dishes or restaurant trends). "
                        "Score 5-7 for fresh, engaging updates with broad appeal. Score below 5 for common or unremarkable content. "
                        "Consider comments for added context (e.g., specific locations or unique details). "
                        "Return only a number"
                    )},
                    {"role": "user", "content": content}
                ],
                max_tokens=5
            )
            base_score = int(response.choices[0].message.content.strip()) if response.choices[0].message.content.strip().isdigit() else 0

            engagement_boost = 0
            if upvotes >= 500:
                engagement_boost += 3
            elif upvotes >= 100:
                engagement_boost += 2
            elif upvotes >= 50:
                engagement_boost += 1
            
            if comment_count >= 100:
                engagement_boost += 2
            elif comment_count >= 20:
                engagement_boost += 1

            final_score = min(base_score + engagement_boost, 10)
            logging.info(f"Reddit Interest Score: {final_score} (base: {base_score}, upvotes: {upvotes}, comments: {comment_count}, top_comments: {len(top_comments)}) for '{title}'")
            return final_score
        except Exception as e:
            logging.warning(f"Reddit interestingness scoring failed (attempt {attempt + 1}): {e}")
            if attempt < MAX_RETRIES - 1:
                time.sleep(RETRY_BACKOFF * (2 ** attempt))
            continue
    logging.error(f"Failed to score Reddit post '{title}' after {MAX_RETRIES} attempts")
    return 0

def get_top_comments(post_url, reddit, limit=3):
    for attempt in range(MAX_RETRIES):
        try:
            submission = reddit.submission(url=post_url)
            submission.comment_sort = 'top'
            submission.comments.replace_more(limit=0)
            top_comments = [comment.body for comment in submission.comments[:limit] if not comment.body.startswith('[deleted]')]
            logging.info(f"Fetched {len(top_comments)} top comments for {post_url}")
            return top_comments
        except Exception as e:
            logging.warning(f"Failed to fetch comments for {post_url} (attempt {attempt + 1}): {e}")
            if attempt < MAX_RETRIES - 1:
                time.sleep(RETRY_BACKOFF * (2 ** attempt))
            continue
    logging.error(f"Failed to fetch comments for {post_url} after {MAX_RETRIES} attempts")
    return []

def fetch_duckduckgo_news_context(title, hours=24):
    for attempt in range(MAX_RETRIES):
        try:
            with DDGS() as ddgs:
                results = ddgs.news(f"{title} news", timelimit="d", max_results=5)
                titles = []
                for r in results:
                    try:
                        date_str = r["date"]
                        if '+00:00' in date_str:
                            dt = datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%S+00:00").replace(tzinfo=timezone.utc)
                        else:
                            dt = datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%SZ").replace(tzinfo=timezone.utc)
                        if dt > (datetime.now(timezone.utc) - timedelta(hours=24)):
                            titles.append(r["title"].lower())
                    except ValueError as e:
                        logging.warning(f"Date parsing failed for '{date_str}': {e}")
                        continue
                context = " ".join(titles) if titles else "No recent news found within 24 hours"
                logging.info(f"DuckDuckGo News context for '{title}': {context}")
                return context
        except Exception as e:
            logging.warning(f"DuckDuckGo News context fetch failed for '{title}' (attempt {attempt + 1}): {e}")
            if attempt < MAX_RETRIES - 1:
                time.sleep(RETRY_BACKOFF * (2 ** attempt))
            continue
    logging.error(f"Failed to fetch DuckDuckGo News context for '{title}' after {MAX_RETRIES} attempts")
    return title

def fetch_reddit_posts():
    """Fetch Reddit posts from specified subreddits, filtering low-quality and [homemade] posts."""
    try:
        reddit = praw.Reddit(
            client_id=REDDIT_CLIENT_ID,
            client_secret=REDDIT_CLIENT_SECRET,
            user_agent=REDDIT_USER_AGENT
        )
        feeds = [
            "food",
            "FoodPorn",
            "spicy",
            "KoreanFood",
            "JapaneseFood",
            "DessertPorn",
            "ChineseFood",
            "IndianFood"
        ]
        articles = []
        cutoff_date = datetime.now(timezone.utc) - timedelta(hours=EXPIRATION_HOURS)
        
        logging.info(f"Starting fetch with cutoff date: {cutoff_date}")
        for subreddit_name in feeds:
            for attempt in range(MAX_RETRIES):
                try:
                    subreddit = reddit.subreddit(subreddit_name)
                    for submission in subreddit.top(time_filter='day', limit=100):
                        pub_date = datetime.fromtimestamp(submission.created_utc, tz=timezone.utc)
                        if pub_date < cutoff_date:
                            logging.info(f"Skipping old post: {submission.title} (Published: {pub_date})")
                            continue
                        if "[homemade]" in submission.title.lower():
                            logging.info(f"Skipping homemade post: {submission.title}")
                            continue
                        cleaned_title = clean_reddit_title(submission.title)
                        if not cleaned_title or len(cleaned_title) < 5:
                            logging.info(f"Skipping post with invalid or short title: {submission.title}")
                            continue
                        # Filter out posts with empty or very short summaries
                        summary = submission.selftext.strip() if submission.selftext else ""
                        if len(summary) < 20 and not submission.url.endswith(('.jpg', '.jpeg', '.png', '.gif')):
                            logging.info(f"Skipping post with insufficient summary: {cleaned_title}")
                            continue
                        # Fetch top comments for additional context
                        top_comments = get_top_comments(f"https://www.reddit.com{submission.permalink}", reddit)
                        articles.append({
                            "title": cleaned_title,
                            "raw_title": submission.title,
                            "link": f"https://www.reddit.com{submission.permalink}",
                            "summary": summary,
                            "feed_title": get_clean_source_name(subreddit_name),
                            "pub_date": pub_date,
                            "upvotes": submission.score,
                            "comment_count": submission.num_comments,
                            "top_comments": top_comments
                        })
                    logging.info(f"Fetched {len(articles)} posts from r/{subreddit_name}")
                    break
                except Exception as e:
                    logging.error(f"Failed to fetch Reddit feed r/{subreddit_name} (attempt {attempt + 1}): {e}")
                    if attempt < MAX_RETRIES - 1:
                        time.sleep(RETRY_BACKOFF * (2 ** attempt))
                    continue
        logging.info(f"Total Reddit posts fetched: {len(articles)}")
        return articles
    except Exception as e:
        logging.error(f"Unexpected error in fetch_reddit_posts: {e}", exc_info=True)
        return []

def curate_from_reddit(post, original_source, source_name, link, page_url):
    logger = logging.getLogger(__name__)
    try:
        content = post.selftext if post.selftext else post.url
        if not content:
            logger.info(f"No content for Reddit post: {post.title}")
            return None, None

        interest_score = is_interesting(content)
        if interest_score < 4:
            logger.info(f"Reddit post '{post.title}' not interesting enough: score {interest_score}")
            return None, None

        summary = summarize_with_gpt4o(content, source_name, link, interest_score=interest_score)
        if not summary:
            logger.warning(f"Failed to summarize Reddit post: {post.title}")
            return None, None

        # Remove the original title from the summary if present
        if post.title in summary:
            summary = summary.replace(post.title, "").strip()
        while "\n\n\n" in summary:
            summary = summary.replace("\n\n\n", "\n\n")

        final_summary = insert_link_naturally(summary, source_name, link)
        if not final_summary:
            logger.warning(f"Failed to insert link for Reddit post: {post.title}")
            return None, None

        post_data, author, category, image_url, image_source, uploader, page_url = prepare_post_data(final_summary, post.title)
        if not post_data:
            logger.info(f"Post preparation failed for Reddit post: {post.title}")
            return None, None

        share_text = f"Check out this tasty find: {post_data['title']}"
        share_text_encoded = quote(share_text)
        share_links_template = (
            "Share this post: "
            '<a href="https://x.com/intent/tweet?url={post_url}&text={share_text}">X</a> | '
            '<a href="https://www.facebook.com/sharer/sharer.php?u={post_url}">Facebook</a>'
        )

        # First call: Post without share links
        post_data["content"] = final_summary
        post_id, post_url = post_to_wp(
            post_data=post_data,
            category=category,
            link=link,
            author=author,
            image_url=image_url,
            original_source=original_source,
            image_source=image_source,
            uploader=uploader,
            page_url=page_url,
            interest_score=interest_score,
            should_post_tweet=True,
            summary=final_summary
        )

        if not post_id:
            logger.warning(f"Failed to post Reddit post to WP: {post_data['title']}")
            return None, None

        # Second call: Update with share links
        post_url_encoded = quote(post_url)
        share_links = share_links_template.format(post_url=post_url_encoded, share_text=share_text_encoded)
        post_data["content"] = f"{final_summary}\n\n{share_links}"
        post_id, post_url = post_to_wp(
            post_data=post_data,
            category=category,
            link=link,
            author=author,
            image_url=None,
            original_source=original_source,
            image_source=image_source,
            uploader=uploader,
            page_url=page_url,
            interest_score=interest_score,
            post_id=post_id,
            should_post_tweet=False
        )

        if post_id:
            logger.info(f"Successfully curated and posted Reddit post: {post_data['title']} (URL: {post_url})")
            return post_id, post_url
        else:
            logger.warning(f"Failed to update Reddit post with share links: {post_data['title']}")
            return None, None

    except Exception as e:
        logger.error(f"Error curating Reddit post '{post.get('title', 'unknown')}': {e}")
        return None, None

def run_reddit_automator():
    lock_fd = None
    try:
        lock_fd = acquire_lock()
        update_system_activity(SCRIPT_NAME, "running", os.getpid())  # Record start
        logging.info("***** Reddit Automator Launched *****")
        # Load JSON files once
        posted_titles_data = load_json_file(POSTED_TITLES_FILE, EXPIRATION_HOURS)
        posted_titles = set(entry["title"] for entry in posted_titles_data)
        used_images_data = load_json_file(USED_IMAGES_FILE, IMAGE_EXPIRATION_DAYS)
        used_images = set(entry["title"] for entry in used_images_data if "title" in entry)
        post_data, category, sleep_time = curate_from_reddit(posted_titles_data, posted_titles, used_images_data, used_images)
        if not post_data:
            logging.info("No postable Reddit article found")
        logging.info("Completed Reddit run")
        update_system_activity(SCRIPT_NAME, "stopped")  # Record stop
        logging.info(f"Run completed, sleep_time: {sleep_time} seconds")
        return post_data, category, sleep_time
    except Exception as e:
        logging.error(f"Fatal error in run_reddit_automator: {e}", exc_info=True)
        update_system_activity(SCRIPT_NAME, "stopped")  # Record stop on error
        sleep_time = random.randint(1200, 1800)  # 20–30 minutes
        logging.info(f"Run completed, sleep_time: {sleep_time} seconds")
        return None, None, sleep_time
    finally:
        if lock_fd:
            fcntl.flock(lock_fd, fcntl.LOCK_UN)
            lock_fd.close()
            os.remove(LOCK_FILE) if os.path.exists(LOCK_FILE) else None

if __name__ == "__main__":
    setup_logging()
    post_data, category, sleep_time = run_reddit_automator()
    logging.info(f"Run completed, sleep_time: {sleep_time} seconds")