/**
 * Revocation probe: drives the REAL local ActivityPods stack through the browser
 * and asserts that Festipod notices when its registration on the user's pod is
 * revoked, instead of staying in a "connected" view whose writes cannot land.
 *
 * THREE PHASES, one fresh user:
 *
 * 1. CURRENT — picker → pod login → consent → app. The app-status probe runs on
 *    load (the GET of the pod's `/.well-known/app-status` is observed on the
 *    wire, with its body, and the app logs `[AppStatus] probe (load) → current`);
 *    a focus + visibilitychange right after does NOT probe at once (one-minute
 *    throttle); an event is created and read back from the pod; a
 *    visibilitychange inside the minute is deferred, not dropped — its probe
 *    lands at the end of the minute and reads current.
 * 2. REVOKED — the registration is removed on the pod
 *    (`POST {pod}/.auth-agent/app-registrations/remove`, the user's own token).
 *    Without any reload, a window focus inside the minute — the user coming
 *    back from the pod's tab — must, by the end of that minute, read the
 *    revocation (`installed:false`) and LOG THE USER OUT: the picker with the
 *    notice that the app's authorization was removed, NO redirect to the
 *    consent screen (a deliberate revocation is not sent back to consent), no
 *    session left (Back and a fresh load stay on the picker; the event-creation
 *    drive that worked in phase 1 lands on the picker, never on success, and
 *    nothing with that title reaches the pod).
 * 3. RECOVERED — signing in again from the picker goes through
 *    `registerApp` → the consent screen; accepting it brings the user back to a
 *    connected app whose probe reads current again, and a write lands. The
 *    pod's own session survived the app's logout, so this sign-in shows no pod
 *    login form: the sign-in click leads straight to consent.
 *
 * Both sign-ins are the shared drive `driveLogin` (`e2e-rights-matrix-support.ts`).
 *
 * Nothing is stubbed: the probe result is whatever the pod answers. The probe
 * is triggered only through the app's real paths (page load, window focus,
 * visibilitychange); its one-minute throttle is untouched.
 *
 * ORIGIN. As for `e2e-login-flow.ts`: the OIDC redirect_uri is registered for
 * `http://localhost:4000/login` only, so the app MUST be served at APP_URL.
 *
 * Exit code 0 only when every phase holds; the JSON report says which did not.
 */

import { chromium, type Page } from 'playwright';
import {
  linkId,
  podLogin,
  readResource,
  recordUri,
  type ApodsSession,
  type ApodsStackConfig,
} from '../src/shared/support/activitypodsStack';
import { driveLogin, type DriveContext } from './e2e-rights-matrix-support';

const strip = (u: string): string => u.replace(/\/+$/, '');
const BACKEND: string = strip(process.env.BACKEND_URL || 'http://localhost:3003');
const APP: string = strip(process.env.APP_URL || 'http://localhost:4000');
const config: ApodsStackConfig = {
  podProviderUrl: strip(process.env.POD_PROVIDER_URL || 'http://localhost:3000'),
  backendUrl: BACKEND,
};
const POD_FRONT = strip(process.env.POD_FRONTEND_URL || 'http://localhost:5000');

const USER = `revoke${Date.now()}`;
const PASS = 'Test1test';
const DEADLINE = Date.now() + 10 * 60 * 1000;

type Phase = 'current' | 'revoked' | 'recovered';
let phase: Phase = 'current';

interface StatusSeen { phase: Phase; status: number; body: unknown }
interface HttpError { phase: Phase; url: string; status: number; method: string; body: string }

const statusSeen: StatusSeen[] = [];
const probeLogs: Array<{ phase: Phase; at: number; text: string }> = [];
const errors4xx: HttpError[] = [];
const writes: Array<{ phase: Phase; method: string; url: string; status: number }> = [];
const consoleErrors: string[] = [];
const redirects: string[] = [];
/** The shared sign-in drive's context (`driveLogin`): it writes the observed hops, tagged by phase; errors are collected by `wire` below. */
const drive: DriveContext = { app: APP, podFront: POD_FRONT, hops: [], errors: [], consoleErrors: [], pageErrors: [], deadline: DEADLINE };

const clean = (s: string): string => s.replace('http://localhost:', ':').replace('http://127.0.0.1:', ':127.');
const bodyText = (page: Page): Promise<string> =>
  page.locator('body').innerText().catch(() => '').then(t => t.replace(/\s+/g, ' ').trim());
const snap = (page: Page, name: string): Promise<void> =>
  page.screenshot({ path: `/tmp/${name}.png`, fullPage: true }).then(() => undefined).catch(() => undefined);
const sleep = (ms: number): Promise<void> => new Promise(r => setTimeout(r, ms));

function wire(page: Page): void {
  let last = '';
  page.on('framenavigated', f => {
    if (f === page.mainFrame() && f.url() !== last) {
      redirects.push(`[${phase}] ${clean(last || '(start)')} -> ${clean(f.url())}`);
      last = f.url();
    }
  });
  page.on('response', r => {
    const method = r.request()?.method?.() ?? '?';
    const url = r.url();
    if (method === 'GET' && url.endsWith('/.well-known/app-status')) {
      const at = phase;
      r.json()
        .then(body => statusSeen.push({ phase: at, status: r.status(), body }))
        .catch(() => statusSeen.push({ phase: at, status: r.status(), body: '(unreadable)' }));
    }
    if ((method === 'POST' || method === 'PUT' || method === 'PATCH') && url.startsWith(config.podProviderUrl)) {
      writes.push({ phase, method, url: clean(url), status: r.status() });
    }
    if (r.status() >= 400) {
      const at = phase;
      r.text()
        .then(b => errors4xx.push({ phase: at, url, status: r.status(), method, body: b.slice(0, 300) }))
        .catch(() => errors4xx.push({ phase: at, url, status: r.status(), method, body: '(unreadable)' }));
    }
  });
  page.on('console', m => {
    const text = m.text();
    if (text.includes('[AppStatus]')) probeLogs.push({ phase, at: Date.now(), text: text.slice(0, 400) });
    if (m.type() === 'error') consoleErrors.push(`[${phase}] ${text.slice(0, 300)}`);
  });
  page.on('pageerror', e => consoleErrors.push(`[${phase}] pageerror: ${String(e.message).slice(0, 300)}`));
}

const onApp = (page: Page): boolean => page.url().startsWith(APP);
const pickerShown = async (page: Page): Promise<boolean> =>
  (await page.locator('text=Connectez-vous avec votre Pod').count().catch(() => 0)) > 0;
const whereIs = async (page: Page): Promise<string> =>
  !onApp(page)
    ? (page.url().startsWith(`${POD_FRONT}/authorize`) ? 'consent' : `elsewhere:${clean(page.url())}`)
    : (await pickerShown(page)) ? 'picker' : 'still-connected';

/** The event-creation drive from `e2e-login-flow.ts`, reporting what the app showed. */
async function createEvent(page: Page, title: string): Promise<{ eventUri?: string; successToast: boolean; finalUrl: string }> {
  let successToast = false;
  const toastWatch = setInterval(() => {
    void page.locator('text=Événement relayé').count().then(n => { if (n) successToast = true; }).catch(() => {});
  }, 250);
  try {
    await page.goto(`${APP}/events/new`, { waitUntil: 'domcontentloaded' }).catch(() => {});
    await page.waitForTimeout(1500);
    await page.locator('input[placeholder="Donnez un nom à votre événement"]').fill(title, { timeout: 3000 }).catch(() => {});
    const dates = page.locator('input[type="date"]');
    if (await dates.count().catch(() => 0)) await dates.first().fill('2026-12-20', { timeout: 3000 }).catch(() => {});
    await page.getByRole('button', { name: /Suivant/ }).click({ timeout: 3000 }).catch(() => {});
    await page.waitForTimeout(1200);
    const next = page.getByRole('button', { name: /Suivant/ });
    if (await next.count().catch(() => 0)) await next.click({ timeout: 3000 }).catch(() => {});
    await page.waitForTimeout(1200);
    await page.getByRole('button', { name: /Relayer l'événement/ }).click({ timeout: 3000 }).catch(() => {});
    await page.waitForTimeout(5000);
  } finally {
    clearInterval(toastWatch);
  }
  const finalUrl = page.url();
  const m = finalUrl.startsWith(`${APP}/events/`) ? /\/events\/([^/?#]+)/.exec(finalUrl.slice(APP.length)) : null;
  const segment = m?.[1];
  const eventUri = segment && segment !== 'new' ? decodeURIComponent(segment) : undefined;
  return { eventUri, successToast, finalUrl };
}

/** Does the user's pod hold an event with this title? Read with the user's own token. */
async function podHoldsEventTitled(session: ApodsSession, title: string): Promise<boolean> {
  const container = await readResource(session, `${session.storage}/as/event`).catch(() => undefined);
  if (!container) return false;
  if (JSON.stringify(container).includes(title)) return true;
  const raw = container['ldp:contains'] ?? container['contains'];
  const members = (Array.isArray(raw) ? raw : raw ? [raw] : []).map(linkId).filter((u): u is string => !!u);
  for (const uri of members) {
    const rec = await readResource(session, uri).catch(() => undefined);
    if (rec && JSON.stringify(rec).includes(title)) return true;
  }
  return false;
}

/** Wait until a predicate holds or the bound elapses. */
async function waitFor(pred: () => boolean | Promise<boolean>, ms: number): Promise<boolean> {
  const end = Date.now() + ms;
  while (Date.now() < end) {
    if (await pred()) return true;
    await sleep(250);
  }
  return pred();
}

/** Fire the real DOM event a probe listener is attached to. */
const fire = (page: Page, trigger: 'focus' | 'visibility'): Promise<void> =>
  page.evaluate((which) => {
    if (which === 'focus') window.dispatchEvent(new Event('focus'));
    else document.dispatchEvent(new Event('visibilitychange'));
  }, trigger).catch(() => {});

const lastProbeAt = (): number =>
  Math.max(0, ...probeLogs.filter(l => l.text.includes('probe (')).map(l => l.at));

/**
 * The probe's own schedule, exercised live and never shortened: fire `trigger`
 * less than a minute after the app's last probe, check that NO probe starts at
 * once (throttle), then wait for the deferred probe of that trigger to land
 * with the expected verdict at the end of the minute (not dropped).
 */
async function deferredProbe(page: Page, trigger: 'focus' | 'visibility', verdict: RegExp): Promise<{
  firedAfterLastProbeMs: number; immediate: boolean; probed: boolean; gapFromLastProbeMs?: number;
}> {
  const last = lastProbeAt();
  const firedAfterLastProbeMs = Date.now() - last;
  const before = probeLogs.length;
  await fire(page, trigger);
  await page.waitForTimeout(3000);
  const immediate = probeLogs.slice(before).some(l => l.text.includes('probe ('));
  const pattern = new RegExp(`probe \\(${trigger}\\) → ${verdict.source}`);
  const probed = await waitFor(() => probeLogs.slice(before).some(l => pattern.test(l.text)), 75_000);
  const hit = probeLogs.slice(before).find(l => pattern.test(l.text));
  return { firedAfterLastProbeMs, immediate, probed, gapFromLastProbeMs: hit ? hit.at - last : undefined };
}

const isCurrent = (b: unknown): boolean =>
  typeof b === 'object' && b !== null && (b as Record<string, unknown>)['installed'] === true && (b as Record<string, unknown>)['upgradeNeeded'] === false;

/** Benign ≥400 by design (same classes as e2e-login-flow.ts). */
function benign(e: HttpError): boolean {
  if (e.url.includes('/.notifications/WebSocketChannel2023')) return true;
  if (e.status === 403 && e.method === 'GET' && /\/data\//.test(e.url)) return true;
  return false;
}

(async () => {
  const user = await podLogin(config, USER, PASS);
  const appDescription = await readResource(undefined, `${BACKEND}/app`);
  const appUri = recordUri(appDescription);
  if (!appUri) throw new Error('GET /app carries no id (the app actor URI)');

  const browser = await chromium.launch({ headless: true, args: ['--allow-insecure-localhost', '--disable-web-security'] });
  const ctx = await browser.newContext();
  const page = await ctx.newPage();
  wire(page);

  // ── Phase 1: CURRENT ────────────────────────────────────────────────────
  // The shared drive opens the app, clicks the pod's sign-in button and follows
  // the observed hops (pod login → consent → shell, bottom navigation shown).
  const connected = (await driveLogin(page, 'current', USER, PASS, drive)).ok;
  const probeRanCurrent = connected && await waitFor(
    () => statusSeen.some(s => s.phase === 'current' && s.status === 200 && isCurrent(s.body))
      && probeLogs.some(l => l.phase === 'current' && /probe \(load\) → current/.test(l.text)),
    15000,
  );
  // Throttle, observed through the real listeners: focus + visibilitychange
  // seconds after the load probe must not issue another status request.
  const beforeNudge = statusSeen.filter(s => s.phase === 'current').length;
  await page.evaluate(() => {
    window.dispatchEvent(new Event('focus'));
    document.dispatchEvent(new Event('visibilitychange'));
  }).catch(() => {});
  await page.waitForTimeout(3000);
  const afterNudge = statusSeen.filter(s => s.phase === 'current').length;
  const throttled = beforeNudge >= 1 && afterNudge === beforeNudge;
  const titleA = `Concert courant ${USER}`;
  const writeA = connected ? await createEvent(page, titleA) : { successToast: false, finalUrl: page.url() } as { eventUri?: string; successToast: boolean; finalUrl: string };
  const writeAOnPod = writeA.eventUri ? await podHoldsEventTitled(user, titleA) : false;
  await snap(page, 'revocation-current-after-write');
  // A visibilitychange right after the write's reload: deferred, then current.
  const visibilityProbe = connected ? await deferredProbe(page, 'visibility', /current/) : undefined;

  // ── Phase 2: REVOKED ────────────────────────────────────────────────────
  phase = 'revoked';
  const revoke = await fetch(`${config.podProviderUrl}/.auth-agent/app-registrations/remove`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${user.token}` },
    body: JSON.stringify({ appUri }),
  });
  const revokeResult = { status: revoke.status, body: (await revoke.text()).slice(0, 300) };
  // Removal is processed by the pod and the app backend; give it a moment to settle.
  await sleep(3000);

  // (a) FOCUS, no reload — the user revokes in the pod's tab and comes back
  // within the minute of the last probe: the deferred focus probe must read the
  // revocation and take the app off the connected view.
  const focusProbe = await deferredProbe(page, 'focus', /stale \(not-installed\)/);
  const leftByFocus = await waitFor(async () => !onApp(page) || (await pickerShown(page)), 15000);
  const leftByFocusTo = await whereIs(page);
  await snap(page, 'revocation-revoked-left-by-focus');

  const notice = page.locator('[data-testid="auth-picker-notice"]');
  const noticeShown = onApp(page) && (await notice.count().catch(() => 0)) > 0;
  const noticeText = noticeShown ? ((await notice.first().innerText().catch(() => '')) as string).replace(/\s+/g, ' ').trim() : '';

  // (b) No session left: Back must not return to the connected view, a fresh
  // load must stay on the picker, and the same event-creation drive that worked
  // in phase 1 must not reach success (it lands on the picker).
  await page.goBack({ waitUntil: 'domcontentloaded' }).catch(() => {});
  await page.waitForTimeout(2000);
  const stillPickerAfterBack = (await whereIs(page)) === 'picker';
  await page.goto(`${APP}/`, { waitUntil: 'domcontentloaded' }).catch(() => {});
  await page.waitForTimeout(2500);
  const stillPickerAfterReload = (await whereIs(page)) === 'picker';
  const titleB = `Concert revoque ${USER}`;
  const writeB = await createEvent(page, titleB);
  await snap(page, 'revocation-revoked-after-write-attempt');
  const leftAfterReload = await waitFor(async () => !onApp(page) || (await pickerShown(page)), 15000);
  const leftAfterReloadTo = await whereIs(page);
  const writeBOnPod = await podHoldsEventTitled(user, titleB);
  const consentRedirectInRevoked = redirects.some(r => r.startsWith('[revoked]') && r.includes(`${clean(POD_FRONT)}/authorize`));
  const pageWritesInRevoked = writes.filter(w => w.phase === 'revoked');
  await snap(page, 'revocation-revoked-left');

  // ── Phase 3: RECOVERED ──────────────────────────────────────────────────
  phase = 'recovered';
  // Sign in again from the picker: login → registerApp → consent → app.
  const signInAgain = page.getByRole('button', { name: /Se connecter avec localhost:3000/i });
  let reconnected = false;
  if (leftAfterReloadTo === 'picker' && (await signInAgain.count().catch(() => 0))) {
    // The same drive: from the app's root (the picker, no session left), sign-in click → pod login → consent → shell.
    reconnected = (await driveLogin(page, 'recovered', USER, PASS, drive)).ok;
  }
  const consentReachedOnSignIn = redirects.some(r => r.startsWith('[recovered]') && r.includes(`${clean(POD_FRONT)}/authorize`));
  const probeReadsCurrentAgain = reconnected && await waitFor(
    () => statusSeen.some(s => s.phase === 'recovered' && s.status === 200 && isCurrent(s.body)),
    15000,
  );
  const titleC = `Concert retabli ${USER}`;
  const writeC = reconnected ? await createEvent(page, titleC) : { successToast: false, finalUrl: page.url() } as { eventUri?: string; successToast: boolean; finalUrl: string };
  const writeCOnPod = writeC.eventUri ? await podHoldsEventTitled(user, titleC) : false;
  await snap(page, 'revocation-recovered-after-write');

  await ctx.close();
  await browser.close();
  await sleep(1000);

  // User decision 2026-10-26: the suite must not accumulate pod datasets. The
  // platform tombstones the account and drops its dataset on a delay.
  const accountDeleted = await fetch(`${config.podProviderUrl}/.account/${USER}`, {
    method: 'DELETE', headers: { Authorization: `Bearer ${user.token}` }, signal: AbortSignal.timeout(60000),
  }).then(r => r.status).catch(() => 0);

  // The deferred probe lands at the end of the minute: never before (throttle),
  // and not much after (it was deferred, not dropped). Measured between the
  // app's own log lines, so a few hundred ms of request latency either way.
  const deferredOnTime = (p?: { immediate: boolean; probed: boolean; gapFromLastProbeMs?: number }): boolean =>
    !!p && !p.immediate && p.probed && p.gapFromLastProbeMs !== undefined
      && p.gapFromLastProbeMs >= 58_000 && p.gapFromLastProbeMs <= 75_000;
  const positive = {
    connected,
    probeRanCurrent,
    throttled,
    statusRequestsAfterNudge: afterNudge,
    write: { ...writeA, onPod: writeAOnPod },
    visibilityProbe,
    ok: connected && probeRanCurrent && throttled && !!writeA.eventUri && writeA.successToast && writeAOnPod
      && deferredOnTime(visibilityProbe),
  };
  const negative = {
    revoke: revokeResult,
    focusProbe,
    leftByFocus,
    leftByFocusTo,
    noticeShown,
    noticeText,
    consentRedirectInRevoked,
    pageWritesInRevoked,
    stillPickerAfterBack,
    stillPickerAfterReload,
    leftAfterReload,
    leftAfterReloadTo,
    writeAttempt: { ...writeB, onPod: writeBOnPod },
    ok: (revoke.status === 200 || revoke.status === 204)
      && deferredOnTime(focusProbe) && leftByFocus && leftByFocusTo === 'picker'
      && noticeShown && noticeText.includes('retirée')
      && !consentRedirectInRevoked && !pageWritesInRevoked.length
      && stillPickerAfterBack && stillPickerAfterReload && leftAfterReloadTo === 'picker'
      && !writeB.eventUri && !writeB.successToast && !writeBOnPod,
  };
  const recovered = {
    reconnected,
    consentReachedOnSignIn,
    probeReadsCurrentAgain,
    write: { ...writeC, onPod: writeCOnPod },
    ok: reconnected && consentReachedOnSignIn && probeReadsCurrentAgain && !!writeC.eventUri && writeC.successToast && writeCOnPod,
  };
  // Phase 2's ≥400s are the revocation's own consequences; the other phases must be clean.
  const fatal = errors4xx.filter(e => e.phase !== 'revoked' && !benign(e));
  const report = {
    user: USER,
    appUri,
    accountDeleted,
    positive,
    negative,
    recovered,
    statusBodies: statusSeen,
    probeLogs,
    writes,
    revokedPhase4xx: errors4xx.filter(e => e.phase === 'revoked').map(e => `${e.status} ${e.method} ${clean(e.url)}`),
    fatal4xx: fatal,
    redirects,
    hops: drive.hops,
    consoleErrors,
    ok: positive.ok && negative.ok && recovered.ok && fatal.length === 0,
  };
  console.log(JSON.stringify(report, null, 2));
  process.exit(report.ok ? 0 : 1);
})().catch(err => {
  console.log(JSON.stringify({ ok: false, fatal: String(err).slice(0, 400), phase, statusSeen, probeLogs, redirects, errors4xx, consoleErrors }, null, 2));
  process.exit(1);
});