import "server-only";

import { cached, invalidateMemory } from "@/lib/cache";
import { redis } from "@/lib/redis";

const DEFAULT_CACHE_TTL = 60;

/**
 * Redis-backed cached query with an in-process fast path (see `cached()`).
 * Use for read-heavy lookups that are safe to serve slightly stale
 * (login user, article bodies, …). Redis stays the shared source of truth.
 */
export async function cachedQuery<T>(
	cacheKey: string,
	queryFn: () => Promise<T>,
	ttl: number = DEFAULT_CACHE_TTL,
): Promise<T> {
	return cached(cacheKey, ttl * 1000, queryFn);
}

/** Invalidate a single cache key immediately (memory + Redis). */
export async function invalidateKey(key: string): Promise<number> {
	invalidateMemory(key);
	if (redis && redis.status !== "end") {
		try {
			return await redis.del(key);
		} catch {
			return 0;
		}
	}
	return 0;
}