import subprocess
import os

def download_fb_content(url, cookies_path):
    """
    Downloads content from a direct Facebook URL using gallery-dl.
    
    Args:
        url (str): The direct URL to the Facebook content.
        cookies_path (str): The path to the cookies.txt file.
    """
    
    # First, check if the cookies file exists before attempting to download.
    if not os.path.exists(cookies_path):
        print(f"Error: Cookies file not found at '{cookies_path}'")
        print("Please ensure the file exists and the path is correct.")
        return  # Stop the function if cookies are missing

    # --- Direct download logic ---
    print("-" * 20)
    print(f"Running gallery-dl for: {url}")
    print("-" * 20)
    
    cmd = [
        "gallery-dl",
        "--cookies", cookies_path,
        url
    ]
    
    try:
        # Run the command and check for any errors during execution.
        subprocess.run(cmd, check=True)
        print("\nDownload completed successfully.")
        
    except FileNotFoundError:
        print("\n--- ERROR ---")
        print("Command 'gallery-dl' not found.")
        print("Please make sure gallery-dl is installed and accessible in your system's PATH.")
        
    except subprocess.CalledProcessError as e:
        print("\n--- ERROR ---")
        print(f"gallery-dl returned an error (Exit Code: {e.returncode}).")
        print("This could be due to an invalid URL, private content, or expired cookies.")
        print("Try running the command directly in your terminal for more detailed error messages.")

# --- EXAMPLE ---

# Set the path to your cookies file.
# Make sure it's in the same directory as this script or provide the full path.
cookies_file = "cookies.txt"

print("--- Downloading Facebook Story Content ---")
story_url = "https://www.facebook.com/stories/108639588358960/UzpfSVNDOjE1NjIwNDMzMjg0ODk0ODA=/?view_single=false"
download_fb_content(story_url, cookies_file)