/**
 * End-to-end recovery flow: 5 guardians, threshold 3.
 *
 * The test boots six Shade instances (alice + bob/carol/dan/eve/faythe),
 * runs `setupRecovery` from alice, simulates loss + new device by
 * spawning `alice2` with a fresh address, then runs `requestRecovery`
 * from alice2. After the flow alice2's storage holds alice's original
 * identity.
 */

import { afterAll, beforeAll, describe, expect, test } from 'bun:test';
import type { Shade } from '@shade/sdk';
import {
  attachGuardian,
  MemoryRecoveryStore,
  RecoveryDeclinedError,
  requestRecovery,
  setupRecovery,
} from '../src/index.js';
import {
  MemoryRecoveryTransport,
  spawnShade,
  startTestPrekeyServer,
  type TestEnv,
} from './helpers.js';

describe('Social key recovery — 3-of-5 end-to-end', () => {
  let env: TestEnv;
  let alice: Shade;
  let alice2: Shade; // new device after loss
  let guardians: Shade[];
  let transport: MemoryRecoveryTransport;
  const guardianStores = new Map<string, MemoryRecoveryStore>();
  const detachers: Array<() => void> = [];

  beforeAll(async () => {
    env = await startTestPrekeyServer();

    alice = await spawnShade(env.prekeyUrl, 'alice');
    const guardianAddrs = ['bob', 'carol', 'dan', 'eve', 'faythe'];
    guardians = await Promise.all(guardianAddrs.map((a) => spawnShade(env.prekeyUrl, a)));
    alice2 = await spawnShade(env.prekeyUrl, 'alice-new-device');

    transport = new MemoryRecoveryTransport();
    transport.add(alice);
    transport.add(alice2);
    for (const g of guardians) transport.add(g);

    // Wire each guardian to auto-approve. We override per-test below
    // when we need declines.
    for (const g of guardians) {
      const store = new MemoryRecoveryStore();
      guardianStores.set(g.myAddress, store);
      const attached = attachGuardian({
        shade: g,
        store,
        approve: async () => true,
        deliver: transport.bind(g),
      });
      detachers.push(attached.stop);
    }
  });

  afterAll(async () => {
    for (const d of detachers) d();
    await alice.shutdown();
    await alice2.shutdown();
    for (const g of guardians) await g.shutdown();
    env.stop();
  });

  test('setup distributes shares to all 5 guardians', async () => {
    const result = await setupRecovery({
      shade: alice,
      guardians: guardians.map((g) => g.myAddress),
      threshold: 3,
      deliver: transport.bind(alice),
    });
    expect(result.threshold).toBe(3);
    expect(result.guardianCount).toBe(5);
    expect(result.allDelivered).toBe(true);
    expect(result.deliveries.length).toBe(5);
    for (const d of result.deliveries) {
      expect(d.error).toBeNull();
    }
    // Each guardian must have stored its share.
    // Allow a microtask for the onMessage handler to finish save.
    await Promise.resolve();
    for (const g of guardians) {
      const store = guardianStores.get(g.myAddress)!;
      const list = await store.list();
      expect(list.length).toBe(1);
      expect(list[0]!.originalAddress).toBe('alice');
      expect(list[0]!.guardianCount).toBe(5);
      expect(list[0]!.threshold).toBe(3);
    }
  });

  test('recovery from new device with all 5 guardians available', async () => {
    // Find the setupId from any guardian.
    const sample = await guardianStores.get('bob')!.list();
    const setupId = sample[0]!.setupId;
    const aliceFingerprintBefore = await alice.fingerprint;

    const result = await requestRecovery({
      shade: alice2,
      originalAddress: 'alice',
      guardians: guardians.map((g) => g.myAddress),
      threshold: 3,
      setupId,
      deliver: transport.bind(alice2),
      timeoutMs: 30_000,
    });

    expect(result.applied).toBe(true);
    expect(result.granted.length).toBeGreaterThanOrEqual(3);
    expect(result.declined.length).toBe(0);
    // alice2 now hosts alice's identity → fingerprints match.
    const recoveredFingerprint = await alice2.fingerprint;
    expect(recoveredFingerprint).toBe(aliceFingerprintBefore);
  });
});