import test from 'node:test';
import assert from 'node:assert/strict';
import { createHash, generateKeyPairSync, sign } from 'node:crypto';
import { domainManifestSigningBytes } from './domain-access.js';
import { DomainAccessOrchestrator } from './domain-access-orchestrator.js';
import { TrustedSignerSnapshotLoader } from './trusted-signer-snapshot.js';

const NOW = 1_786_291_200_000;
const DOMAIN_ID = 'DOM-FIFTH-0001';
const NODE_ID = 'LOCAL-001';
const COMMIT = 'a'.repeat(40);
const ANCHOR_URL = 'https://guanghulab.com/api/ai/v1/anchor';
const REGISTRY_URL = `https://guanghulab.com/code/bingshuo/guanghu-ice-heart/raw/commit/${COMMIT}/routing/trusted-domain-manifest-signers.json`;
const { privateKey, publicKey } = generateKeyPairSync('ed25519');

function anchor() {
  return {
    schema: 'guanghu.public-navigation-anchor/v1',
    anchor_id: 'GLW-PUBLIC-NAV-ANCHOR-001',
    state: 'CURRENT_CANONICAL',
    repository_id: 'REPO-012',
    branch: 'main',
    public_entry: ANCHOR_URL,
    code_entry: 'https://guanghulab.com/code/bingshuo/guanghu-ice-heart',
    maps: {
      trusted_domain_manifest_signers: {
        path: 'routing/trusted-domain-manifest-signers.json',
        id: 'GH-AIOS-TRUSTED-DOMAIN-MANIFEST-SIGNERS-001',
        version: '1.0.0',
      },
    },
    navigation_source: {
      anchor_id: 'GLW-PUBLIC-NAV-ANCHOR-001',
      source_commit: COMMIT,
      source_mode: 'REPO-012_MAIN_GIT_SNAPSHOT',
      source_degraded: false,
    },
  };
}

function registry(signers: unknown[] = []) {
  return {
    registryId: 'GH-AIOS-TRUSTED-DOMAIN-MANIFEST-SIGNERS-001',
    schema: 'gh-aios.trusted-domain-manifest-signers/v1',
    signers,
    state: 'CURRENT',
    version: '1.0.0',
  };
}

function activeSigner() {
  return {
    algorithm: 'Ed25519',
    domainIds: [DOMAIN_ID],
    publicKeyPem: publicKey.export({ format: 'pem', type: 'spki' }).toString(),
    repositoryId: 'REPO-014',
    signerId: 'GH-LIGHTHOUSE-001',
    status: 'ACTIVE',
  };
}

function loader(readRegistry: () => unknown = () => registry()) {
  return new TrustedSignerSnapshotLoader({
    async fetchJson(url) {
      if (url === ANCHOR_URL) return anchor();
      if (url === REGISTRY_URL) return readRegistry();
      throw new Error('unexpected_url');
    },
  });
}

function validHandoff() {
  const payload = {
    domainId: DOMAIN_ID,
    repositoryId: 'REPO-014',
    schema: 'gh-aios.domain-manifest/v1',
    signerId: 'GH-LIGHTHOUSE-001',
    sourceCommit: 'b'.repeat(40),
  } as const;
  const bytes = domainManifestSigningBytes(payload);
  const digest = createHash('sha256').update(bytes).digest('hex');
  return {
    connectionReceipt: {
      connectionId: 'CONN-001',
      domainId: DOMAIN_ID,
      manifestDigest: digest,
      nodeId: NODE_ID,
      receiptId: 'RECEIPT-001',
      state: 'online',
    },
    manifest: {
      digest,
      ...payload,
      signature: sign(null, bytes, privateKey).toString('base64'),
    },
    sessionCapability: {
      capabilityId: 'CAP-001',
      domainId: DOMAIN_ID,
      expiresAt: NOW + 60_000,
      nodeId: NODE_ID,
      scopes: ['domain:enter'],
    },
  };
}

test('projects public trust health without asking for a handoff before login', async () => {
  let handoffReads = 0;
  const orchestrator = new DomainAccessOrchestrator(
    loader(),
    { async read() { return { accountVerified: false, nodeId: '' }; } },
    { async read() { handoffReads += 1; return null; } },
  );

  const status = await orchestrator.domainAccess(DOMAIN_ID, NOW);

  assert.equal(handoffReads, 0);
  assert.equal(status.stage, 'login-required');
  assert.equal(status.runtimeReady, false);
  assert.equal(status.localWorkspaceAllowed, true);
  assert.deepEqual(status.trustSource, {
    status: 'CURRENT',
    sourceCommit: COMMIT,
    registryVersion: '1.0.0',
    signerCount: 0,
  });
});

test('an authenticated node without a verified handoff remains identity-only', async () => {
  const orchestrator = new DomainAccessOrchestrator(
    loader(),
    { async read() { return { accountVerified: true, nodeId: NODE_ID }; } },
    { async read() { return null; } },
  );

  const status = await orchestrator.domainAccess(DOMAIN_ID, NOW);

  assert.equal(status.stage, 'identity-verified');
  assert.equal(status.runtimeReady, false);
  assert.ok(status.blockers.includes('verified_domain_manifest_missing'));
});

test('a loaded signer snapshot and verified handoff project runtime-ready', async () => {
  const orchestrator = new DomainAccessOrchestrator(
    loader(() => registry([activeSigner()])),
    { async read() { return { accountVerified: true, nodeId: NODE_ID }; } },
    { async read() {
      return {
        handoff: validHandoff(),
        signerLookup: { repositoryId: 'REPO-014', signerId: 'GH-LIGHTHOUSE-001' },
      };
    } },
  );

  const status = await orchestrator.domainAccess(DOMAIN_ID, NOW);

  assert.equal(status.stage, 'runtime-ready');
  assert.equal(status.runtimeReady, true);
  assert.deepEqual(status.blockers, []);
  assert.equal(status.trustSource.status, 'CURRENT');
});

test('source and handoff failures are reduced to safe status without raw details', async () => {
  const orchestrator = new DomainAccessOrchestrator(
    new TrustedSignerSnapshotLoader({ async fetchJson() { throw new Error('secret source detail'); } }),
    { async read() { return { accountVerified: true, nodeId: NODE_ID }; } },
    { async read() { throw new Error('secret handoff detail'); } },
  );

  const status = await orchestrator.domainAccess(DOMAIN_ID, NOW);

  assert.equal(status.stage, 'identity-verified');
  assert.equal(status.runtimeReady, false);
  assert.equal(status.trustSource.status, 'UNAVAILABLE');
  assert.equal(status.trustSource.reason, 'SOURCE_UNAVAILABLE');
  assert.equal(JSON.stringify(status).includes('secret'), false);
});

test('a last-known-good signer can project access while preserving degraded health', async () => {
  let currentRegistry: unknown = registry([activeSigner()]);
  const signerLoader = loader(() => currentRegistry);
  await signerLoader.refresh();
  currentRegistry = { ...registry([activeSigner()]), version: 'invalid' };
  const orchestrator = new DomainAccessOrchestrator(
    signerLoader,
    { async read() { return { accountVerified: true, nodeId: NODE_ID }; } },
    { async read() {
      return {
        handoff: validHandoff(),
        signerLookup: { repositoryId: 'REPO-014', signerId: 'GH-LIGHTHOUSE-001' },
      };
    } },
  );

  const status = await orchestrator.domainAccess(DOMAIN_ID, NOW);

  assert.equal(status.runtimeReady, true);
  assert.equal(status.trustSource.status, 'DEGRADED_LAST_KNOWN_GOOD');
  assert.equal(status.trustSource.reason, 'REGISTRY_INVALID');
});