import { LRUCache } from 'lru-cache';
export class MemoryCache {
    cache;
    constructor() {
        const defaultTtl = process.env.CACHE_DEFAULT_TTL ? parseInt(process.env.CACHE_DEFAULT_TTL) : 1000 * 60 * 5; // 5 mins default
        this.cache = new LRUCache({
            max: 1000,
            ttl: defaultTtl,
            updateAgeOnGet: false,
        });
    }
    async get(key) {
        const value = this.cache.get(key);
        return value || null;
    }
    async set(key, value, ttl) {
        this.cache.set(key, value, { ttl: ttl ? ttl * 1000 : undefined });
    }
    async del(key) {
        this.cache.delete(key);
    }
    async flush(pattern) {
        if (pattern) {
            // Support simple wildcard patterns (e.g. "home-feed*", "*-feed*")
            // Escape special regex chars except *, then replace * with .*
            const regexPattern = pattern
                .replace(/[.+^${}()|[\]\\]/g, '\\$&') // Escape regex chars
                .replace(/\*/g, '.*'); // Convert * to .*
            const regex = new RegExp(`^${regexPattern}$`);
            for (const key of this.cache.keys()) {
                if (typeof key === 'string' && regex.test(key)) {
                    this.cache.delete(key);
                }
            }
        }
        else {
            this.cache.clear();
        }
    }
    keys() {
        return [...this.cache.keys()];
    }
    info() {
        return {
            size: this.cache.size,
            max: this.cache.max,
            provider: 'memory-lru',
        };
    }
    entries() {
        return [...this.cache.keys()].map(key => ({
            key,
            remainingTTL: this.cache.getRemainingTTL(key),
        }));
    }
}
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