/**
 * Tests integration RedisCache contre un vrai Redis 7 (testcontainers).
 *
 * Choix : testcontainers Redis 7-alpine est leger (~3-5s) et l'API ioredis
 * est complexe a mocker fidelement (multi/scan/zadd...) donc on prefere un vrai
 * container plutot qu'un mock. Coverage attendue >= 70% lines+branches.
 */

import IORedis from 'ioredis';
import pino from 'pino';
import { GenericContainer, type StartedTestContainer } from 'testcontainers';
import { afterAll, afterEach, beforeAll, describe, expect, it } from 'vitest';
import { RedisCache } from '../../src/adapters/redis-cache.js';

const silentLogger = () => pino({ level: 'silent' });

describe('RedisCache integration', () => {
  let container: StartedTestContainer;
  let cache: RedisCache;
  let url: string;

  beforeAll(async () => {
    container = await new GenericContainer('redis:7-alpine').withExposedPorts(6379).start();
    const host = container.getHost();
    const port = container.getMappedPort(6379);
    url = `redis://${host}:${port}`;
    cache = new RedisCache({ url, logger: silentLogger() });
    // Attendre l'event 'ready' avant de lancer les tests — sinon le 1er test peut
    // hit le client avant que la handshake soit terminee (enableOfflineQueue: false).
    await new Promise<void>((resolve, reject) => {
      const timer = setTimeout(() => reject(new Error('redis ready timeout')), 10_000);
      // biome-ignore lint/suspicious/noExplicitAny: acces interne au client pour test
      const client = (cache as unknown as { client: any }).client;
      if (client.status === 'ready') {
        clearTimeout(timer);
        resolve();
      } else {
        client.once('ready', () => {
          clearTimeout(timer);
          resolve();
        });
      }
    });
  }, 60_000);

  afterAll(async () => {
    await cache?.close();
    await container?.stop();
  }, 30_000);

  // Nettoyage entre tests pour eviter les pollutions
  afterEach(async () => {
    const flushClient = new IORedis(url);
    await flushClient.flushdb();
    await flushClient.quit();
  });

  describe('get/set roundtrip', () => {
    it('set + get retourne la valeur JSON typee', async () => {
      const key = `test:obj:${crypto.randomUUID()}`;
      const value = { foo: 'bar', n: 42, list: [1, 2, 3] };

      await cache.set(key, value, 60);
      const got = await cache.get<typeof value>(key);

      expect(got).toEqual(value);
    });

    it('get retourne null si la cle est absente', async () => {
      const got = await cache.get('non-existent-key');
      expect(got).toBeNull();
    });

    it('respecte le TTL par defaut (300s) quand non fourni', async () => {
      const flushClient = new IORedis(url);
      const key = `test:ttl:${crypto.randomUUID()}`;
      await cache.set(key, { x: 1 });
      const ttl = await flushClient.ttl(key);
      await flushClient.quit();
      // TTL doit etre proche de 300s (peut varier de quelques secondes)
      expect(ttl).toBeGreaterThan(290);
      expect(ttl).toBeLessThanOrEqual(300);
    });

    it('respecte un TTL custom', async () => {
      const flushClient = new IORedis(url);
      const key = `test:ttl-custom:${crypto.randomUUID()}`;
      await cache.set(key, 'x', 42);
      const ttl = await flushClient.ttl(key);
      await flushClient.quit();
      expect(ttl).toBeGreaterThan(35);
      expect(ttl).toBeLessThanOrEqual(42);
    });

    it('get supprime la cle si la valeur stockee n est pas du JSON valide', async () => {
      const flushClient = new IORedis(url);
      const key = `test:bad-json:${crypto.randomUUID()}`;
      await flushClient.set(key, 'pas-du-json{{{');

      const got = await cache.get(key);
      expect(got).toBeNull();
      const after = await flushClient.get(key);
      await flushClient.quit();
      expect(after).toBeNull();
    });
  });

  describe('del', () => {
    it('supprime une cle unique', async () => {
      const key = `test:del:${crypto.randomUUID()}`;
      await cache.set(key, 'v', 60);

      await cache.del(key);

      expect(await cache.get(key)).toBeNull();
    });

    it('supprime un tableau de cles', async () => {
      const k1 = `test:del:${crypto.randomUUID()}`;
      const k2 = `test:del:${crypto.randomUUID()}`;
      await cache.set(k1, 'a', 60);
      await cache.set(k2, 'b', 60);

      await cache.del([k1, k2]);

      expect(await cache.get(k1)).toBeNull();
      expect(await cache.get(k2)).toBeNull();
    });

    it('no-op sur tableau vide (pas d erreur)', async () => {
      await expect(cache.del([])).resolves.toBeUndefined();
    });
  });

  describe('invalidatePattern', () => {
    it('supprime toutes les cles matchant le pattern et retourne le count', async () => {
      const prefix = `test:invalidate:${crypto.randomUUID()}`;
      await cache.set(`${prefix}:a`, 1, 60);
      await cache.set(`${prefix}:b`, 2, 60);
      await cache.set(`${prefix}:c`, 3, 60);
      // Cle qui ne matche pas — doit survivre.
      const survivor = `test:other:${crypto.randomUUID()}`;
      await cache.set(survivor, 99, 60);

      const count = await cache.invalidatePattern(`${prefix}:*`);

      expect(count).toBe(3);
      expect(await cache.get(`${prefix}:a`)).toBeNull();
      expect(await cache.get(survivor)).toBe(99);
    });

    it('retourne 0 quand aucun match', async () => {
      const count = await cache.invalidatePattern(`test:nomatch:${crypto.randomUUID()}:*`);
      expect(count).toBe(0);
    });
  });

  describe('checkAndStoreEventId (idempotence webhooks)', () => {
    it('retourne false sur premier call, true sur duplicate', async () => {
      const eventId = crypto.randomUUID();

      const firstSeen = await cache.checkAndStoreEventId(eventId, 60);
      const secondSeen = await cache.checkAndStoreEventId(eventId, 60);

      expect(firstSeen).toBe(false);
      expect(secondSeen).toBe(true);
    });

    it('TTL applique sur la cle event', async () => {
      const flushClient = new IORedis(url);
      const eventId = crypto.randomUUID();

      await cache.checkAndStoreEventId(eventId, 30);
      const ttl = await flushClient.ttl(`bridge:webhook:event:${eventId}`);
      await flushClient.quit();

      expect(ttl).toBeGreaterThan(20);
      expect(ttl).toBeLessThanOrEqual(30);
    });
  });

  describe('checkRateLimit', () => {
    it('autorise les requetes sous la limite', async () => {
      const key = `rl:${crypto.randomUUID()}`;

      const r1 = await cache.checkRateLimit(key, 5, 10);
      await new Promise((r) => setTimeout(r, 2));
      const r2 = await cache.checkRateLimit(key, 5, 10);
      await new Promise((r) => setTimeout(r, 2));
      const r3 = await cache.checkRateLimit(key, 5, 10);

      expect(r1).toBe(true);
      expect(r2).toBe(true);
      expect(r3).toBe(true);
    });

    it('refuse les requetes au-dela de la limite', async () => {
      const key = `rl-deny:${crypto.randomUUID()}`;
      // Note: les appels DOIVENT etre espaces de >= 1ms car le ZSET utilise
      // `${Date.now()}` comme membre — sinon collision sur meme ms (valeur unique).
      // Saturer la fenetre.
      for (let i = 0; i < 3; i++) {
        await cache.checkRateLimit(key, 3, 10);
        await new Promise((r) => setTimeout(r, 2));
      }

      const overLimit = await cache.checkRateLimit(key, 3, 10);

      expect(overLimit).toBe(false);
    });
  });

  describe('healthCheck', () => {
    it('retourne true quand Redis repond', async () => {
      const ok = await cache.healthCheck();
      expect(ok).toBe(true);
    });

    it('retourne false quand le client echoue (URL invalide)', async () => {
      const broken = new RedisCache({
        url: 'redis://127.0.0.1:1', // port qui ne repond pas
        logger: silentLogger(),
      });
      const ok = await broken.healthCheck();
      expect(ok).toBe(false);
      // Cleanup — on ne crash pas sur close meme si non connecte.
      await broken.close().catch(() => {});
    });
  });
});