import argparse
import logging
from facebook_scraper import get_posts
from rfeed import Item, Feed, Guid
import datetime
import os

# Configure logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

def scrape_facebook_page(page_name, pages_count=1):
    """
    Scrapes the posts from a Facebook page.
    """
    logging.info(f"Starting scrape for page: {page_name}")
    posts_data = []
    try:
        # get_posts returns a generator
        for post in get_posts(page_name, pages=pages_count):
            posts_data.append(post)
    except Exception as e:
        logging.error(f"Error scraping page {page_name}: {e}")
    
    logging.info(f"Retrieved {len(posts_data)} posts.")
    return posts_data

def generate_rss(posts, page_name, output_file="feed.xml"):
    """
    Generates an RSS feed from the scraped posts.
    """
    items = []
    for post in posts:
        # Extract relevant data
        post_id = post.get('post_id')
        text = post.get('text') or "No text content"
        post_url = post.get('post_url')
        time = post.get('time')
        image = post.get('image')
        
        # Create RSS item
        item = Item(
            title=text[:60] + "..." if len(text) > 60 else text,
            link=post_url, 
            description=f"{text}<br/><br/>" + (f"<img src='{image}'/>" if image else ""),
            author=page_name,
            guid=Guid(post_id),
            pubDate=time
        )
        items.append(item)

    feed = Feed(
        title=f"{page_name} Facebook Feed",
        link=f"https://www.facebook.com/{page_name}",
        description=f"RSS feed for {page_name} Facebook page",
        language="en-US",
        lastBuildDate=datetime.datetime.now(),
        items=items
    )

    with open(output_file, "w", encoding='utf-8') as f:
        f.write(feed.rss())
    logging.info(f"RSS feed written to {output_file}")

def main():
    parser = argparse.ArgumentParser(description="Facebook to RSS Scraper")
    parser.add_argument("page_name", help="Name or ID of the Facebook page")
    parser.add_argument("--output", default="feed.xml", help="Output RSS file name")
    parser.add_argument("--pages", type=int, default=1, help="Number of pages to scrape")
    
    args = parser.parse_args()
    
    posts = scrape_facebook_page(args.page_name, args.pages)
    if posts:
        generate_rss(posts, args.page_name, args.output)
    else:
        logging.warning("No posts found or scraping failed.")

if __name__ == "__main__":
    main()