import { randomUUID } from 'crypto';
import { ConfigService } from '@nestjs/config';
import { RedisCacheAdapter } from '../../src/infrastructure/cache/redis-cache.adapter';

describe('Redis cache integration', () => {
  let cache: RedisCacheAdapter;
  const prefix = `integration:${randomUUID()}:`;
  const keys = ['value', 'expires'].map(key => `${prefix}${key}`);

  beforeAll(async () => {
    cache = new RedisCacheAdapter(
      new ConfigService({
        REDIS_HOST: process.env.REDIS_HOST,
        REDIS_PORT: Number(process.env.REDIS_PORT),
        REDIS_PASSWORD: process.env.REDIS_PASSWORD || undefined,
        REDIS_DB: Number(process.env.REDIS_DB),
      })
    );
    await cache.onModuleInit();
  });

  afterAll(async () => {
    try {
      // Delete only this suite's keys; never flush a shared database.
      await cache.deleteMany(keys);
    } finally {
      await cache.onModuleDestroy();
    }
  });

  it('round-trips cached application data and invalidates it', async () => {
    const value = { amount: 125.5, currency: 'EUR', ports: ['FRLEH', 'USNYC'] };
    await cache.set(keys[0], value, 60);
    expect(await cache.get(keys[0])).toEqual(value);
    await cache.delete(keys[0]);
    expect(await cache.get(keys[0])).toBeNull();
  });

  it('expires cached data using the server TTL', async () => {
    await cache.set(keys[1], { valid: true }, 1);
    expect(await cache.exists(keys[1])).toBe(true);
    await new Promise(resolve => setTimeout(resolve, 1200));
    expect(await cache.exists(keys[1])).toBe(false);
  });
});