const { logToFile } = require('./logger');

class MemoryCache {
  constructor() {
    this.store = new Map();
  }

  get(key) {
    const entry = this.store.get(key);
    if (!entry) return null;
    if (Date.now() > entry.expiresAt) {
      this.store.delete(key);
      return null;
    }
    return entry.value;
  }

  set(key, value, ttlMs) {
    this.store.set(key, {
      value,
      expiresAt: Date.now() + ttlMs
    });
  }

  invalidate(key) {
    this.store.delete(key);
  }

  clear() {
    this.store.clear();
  }
}

const cache = new MemoryCache();

module.exports = cache;