import { env } from '$env/dynamic/private';
import KeyvValkey from '@keyv/valkey';
import { createCache, type Cache } from 'cache-manager';
import { CacheableMemory, Keyv } from 'cacheable';

export class CacheBackend {
	private static cache: Cache;

	/**
	 * Set a cached value
	 * @param key Key to set
	 * @param data Data to set
	 * @param ttl Time-to-live in milliseconds
	 */
	public static async set<T = unknown>(key: string, data: T, ttl?: number): Promise<T> {
		return CacheBackend.cache.set(key, data, ttl);
	}

	/**
	 * Get a cached value
	 * @param key Key to retrieve from cache
	 * @returns Value
	 */
	public static async get<T = unknown>(key: string): Promise<T | undefined> {
		return CacheBackend.cache.get(key) as T;
	}

	/**
	 * Delete a cached value
	 * @param key Key to delete from cache
	 * @returns Success
	 */
	public static async del(key: string) {
		return CacheBackend.cache.del(key);
	}

	/**
	 * Initialize configured cache backend
	 */
	public static async init() {
		CacheBackend.cache = createCache({
			stores: [
				new Keyv({
					store: env.VALKEY_URI
						? new KeyvValkey(env.VALKEY_URI)
						: new CacheableMemory({ ttl: 3600000, lruSize: 5000 })
				})
			]
		});
	}
}