import time
import os
from app.core.index import faiss_index
from app.core.config import settings

def watch_and_reload(interval=600):
    print("[HOT-RELOAD] Watching index file for updates...")
    last_mtime = None
    while True:
        try:
            mtime = os.path.getmtime(settings.INDEX_FILE)
            if last_mtime is None:
                last_mtime = mtime
            elif mtime != last_mtime:
                print("[HOT-RELOAD] Detected new index file. Reloading...")
                faiss_index.update_index(settings.INDEX_FILE)
                last_mtime = mtime
        except Exception as e:
            print(f"[HOT-RELOAD] Error: {e}")
        time.sleep(interval)

if __name__ == "__main__":
    watch_and_reload()