#!/usr/bin/env python3
"""
Knowledge Universe — Orphan Cache Cleanup Script
Removes orphaned metadata keys from Redis.
Usage: python scripts/cleanup_orphans.py
"""
import asyncio
import redis.asyncio as aioredis

REDIS_HOST = "localhost"
REDIS_PORT = 6379

async def cleanup():
    client = aioredis.Redis(host=REDIS_HOST, port=REDIS_PORT, decode_responses=True)
    print("Scanning for orphaned metadata keys...")

    orphans = []
    async for key in client.scan_iter(match="*:meta"):
        parent = key.replace(":meta", "")
        if not await client.exists(parent):
            orphans.append(key)

    if not orphans:
        print("No orphaned keys found.")
    else:
        print(f"Found {len(orphans)} orphaned keys. Deleting...")
        for k in orphans:
            await client.delete(k)
        print(f"Deleted {len(orphans)} orphaned metadata keys.")

    await client.aclose()

if __name__ == "__main__":
    asyncio.run(cleanup())