/**
 * DIAGNOSTIC (not a gate): reproduce the invite-link contact flow end to end
 * with two FRESH accounts and inspect what lands in each pod's apods:contacts —
 * then run the app's own fetchCollectionMemberIds against the real collections.
 *
 * Usage: bun scripts/diag-invite.ts
 */
import {
  loginWithRetry,
  http,
  poll,
  parseJson,
  itemUris,
  need,
  sleep,
} from './e2e-rights-matrix-support';
import type { ApodsSession } from '../src/shared/support/activitypodsStack';
// The app's real reader — tested here against a REAL collection document.
import { fetchCollectionMemberIds } from '../src/shared/data/contacts';

const TS = Date.now();
const PASS = 'Test1test';
const POD = process.env.VITE_POD_PROVIDER_URL || 'http://localhost:3000';
const A_NAME = `diaginv${TS}a`;
const B_NAME = `diaginv${TS}b`;
const config = { podProviderUrl: POD, backendUrl: process.env.BACKEND_URL || process.env.VITE_BACKEND_URL || 'http://localhost:3005' };

const CRED_CTX = [
  'https://www.w3.org/ns/credentials/v2',
  { as: 'https://www.w3.org/ns/activitystreams#', apods: 'http://activitypods.org/ns/core#', acl: 'http://www.w3.org/ns/auth/acl#' },
];

async function actorDoc(session: ApodsSession): Promise<Record<string, any>> {
  const r = await http('GET', session.webId, { token: session.token });
  return need(parseJson(r.text), `actor doc for ${session.webId}`);
}
const linkOf = (v: any): string | undefined =>
  typeof v === 'string' ? v : v?.id ?? v?.['@id'];

async function main() {
  console.log('1) Signup of two fresh accounts (browser-driven, slow)...');
  const a = await loginWithRetry(config, A_NAME, PASS);
  const b = await loginWithRetry(config, B_NAME, PASS);
  console.log('   A (inviter):', a.webId);
  console.log('   B (invitee):', b.webId);

  const aDoc = await actorDoc(a);
  const bDoc = await actorDoc(b);
  const aProfile = need(linkOf(aDoc.url), 'A profile URI');
  const bProfile = need(linkOf(bDoc.url), 'B profile URI');
  const bOutbox = need(linkOf(bDoc.outbox), 'B outbox');

  console.log('2) A creates the invite capability...');
  const issue = async () =>
    http('POST', `${a.webId}/vc/v0.3/credentials/issue`, {
      token: a.token,
      contentType: 'application/json',
      accept: 'application/ld+json',
      timeoutMs: 30000,
      body: JSON.stringify({
        credential: {
          '@context': CRED_CTX,
          type: 'VerifiableCredential',
          name: 'Invite Link',
          credentialSubject: {
            'apods:hasActivityGrant': {
              type: 'as:Offer',
              'as:to': { '@id': a.webId },
              'as:target': { '@id': a.webId },
              'as:object': { type: 'as:Add', 'as:object': { type: 'as:Profile' } },
            },
            'apods:hasAuthorization': {
              type: 'acl:Authorization',
              'acl:mode': 'acl:Read',
              'acl:accessTo': { '@id': aProfile },
            },
          },
        },
      }),
    });
  let capRes = await issue();
  for (let attempt = 0; capRes.status === 0 && attempt < 10; attempt++) {
    console.log('   VC issue unreachable (', capRes.error ?? 'timeout', ') — retrying in 3 s...');
    await sleep(3000);
    capRes = await issue();
  }
  const capJson = parseJson(capRes.text);
  const capUri = typeof capJson?.id === 'string' ? capJson.id : undefined;
  console.log('   VC issue:', capRes.status, capUri ?? `${capRes.error ?? ''} ${capRes.text.slice(0, 160)}`);
  if (!capUri) throw new Error('capability creation failed');

  console.log('3) B reads the capability (proof the grant works)...');
  const capDoc = await http('GET', capUri, { token: b.token, accept: 'application/ld+json' });
  console.log('   capability fetch:', capDoc.status, capDoc.text.slice(0, 120).replace(/\s+/g, ' '));

  console.log('4) B builds the presentation (challenge from A, sign at B)...');
  const challengeRes = await http('POST', `${a.webId}/vc/v0.3/challenges`, { token: b.token, accept: 'application/ld+json' });
  const challenge = need(parseJson(challengeRes.text)?.challenge, 'challenge');
  const presRes = await http('POST', `${b.webId}/vc/v0.3/presentations/`, {
    token: b.token,
    contentType: 'application/json',
    accept: 'application/ld+json',
    body: JSON.stringify({
      presentation: {
        '@context': CRED_CTX,
        type: 'VerifiablePresentation',
        verifiableCredential: [need(parseJson(capDoc.text), 'VC doc')],
      },
      options: { challenge, persist: false },
    }),
  });
  const presentation = parseJson(presRes.text);
  console.log('   presentation:', presRes.status, presentation ? 'ok' : presRes.text.slice(0, 160));

  console.log('5) B posts Offer{Add{profile}} + capability to B\'s outbox...');
  const offer = await http('POST', bOutbox, {
    token: b.token,
    contentType: 'application/ld+json',
    accept: 'application/ld+json',
    body: JSON.stringify({
      '@context': 'https://www.w3.org/ns/activitystreams',
      type: 'Offer',
      actor: b.webId,
      object: { type: 'Add', object: { id: bProfile, type: 'Profile' } },
      target: a.webId,
      to: a.webId,
      capability: presentation,
    }),
  });
  console.log('   outbox post:', offer.status, offer.text.slice(0, 120).replace(/\s+/g, ' '));

  console.log('6) Polling the apods:contacts collections (up to 60 s)...');
  const contactsUriOf = (doc: Record<string, any>) => linkOf(doc['apods:contacts']);
  const aContacts = need(contactsUriOf(aDoc), 'A contacts URI');
  const bContacts = need(contactsUriOf(bDoc), 'B contacts URI');
  const readItems = async (uri: string, token: string) =>
    itemUris(parseJson((await http('GET', uri, { token })).text));

  const aPoll = await poll(() => readItems(aContacts, a.token), v => v.length > 0, 60000, 2000);
  await sleep(3000);
  const bPoll = await readItems(bContacts, b.token);
  console.log('   A contacts items:', JSON.stringify(aPoll));
  console.log('   B contacts items:', JSON.stringify(bPoll));

  console.log('7) The APP reader against the REAL collection documents...');
  const aDocRaw = (await http('GET', aContacts, { token: a.token })).text;
  const bDocRaw = (await http('GET', bContacts, { token: b.token })).text;
  console.log('   A collection doc (first 400):', aDocRaw.replace(/\s+/g, ' ').slice(0, 400));
  console.log('   B collection doc (first 400):', bDocRaw.replace(/\s+/g, ' ').slice(0, 400));
  const appReadsA = await fetchCollectionMemberIds(aContacts, a.token, a.webId);
  const appReadsB = await fetchCollectionMemberIds(bContacts, b.token, b.webId);
  console.log('   app fetchCollectionMemberIds(A):', JSON.stringify(appReadsA));
  console.log('   app fetchCollectionMemberIds(B):', JSON.stringify(appReadsB));

  const ok = appReadsA.includes(b.webId) && appReadsB.includes(a.webId);
  console.log(ok ? 'VERDICT: platform flow + app reader BOTH OK' : 'VERDICT: MISMATCH — see above');
  process.exit(ok ? 0 : 1);
}

main().catch((e) => { console.error('DIAG FAILED:', e); process.exit(2); });