// Headless smoke test for site/i18n.js + site/app.js — tiny DOM shim, drives the full flow
// in BOTH languages (EN run on defaults, FR run with lang:'fr' persisted).
// Run: node tests/ui.smoke.js  (exits 0 + prints SMOKE-OK)
'use strict';
const fs = require('fs'), path = require('path');
const SITE = path.join(__dirname, '..', 'site');
const LS = 'retire-planner-v1';

/* normalize narrow-nbsp/nbsp → space (fr-CA Intl + frNorm typography) for regex checks */
const N = s => String(s == null ? '' : s).replace(/[\u202f\u00a0]/g, ' ');

let registry = {};
function makeEl(id) {
  const el = {
    id, _html: '', _l: {}, style: {}, dataset: {}, hidden: false,
    value: '', textContent: '', disabled: false,
    get innerHTML() { return this._html; },
    set innerHTML(v) { this._html = String(v); },
    addEventListener(t, fn) { this._l[t] = fn; },
    setAttribute() { }, getAttribute() { return null; },
    querySelector() { return makeEl(id + '>q'); },
    querySelectorAll() { return []; },
    contains() { return false; },
    appendChild() { },
    remove() { },
    classList: { add() { }, remove() { }, toggle() { }, contains() { return false; } },
  };
  Object.defineProperty(el, 'onclick', { set(f) { this._l.click = f; }, get() { return this._l.click; } });
  Object.defineProperty(el, 'oninput', { set(f) { this._l.input = f; }, get() { return this._l.input; } });
  return el;
}
function q(sel) {
  const id = sel.replace(/^#/, '');
  if (sel === '.panel-h') return null;
  return registry[id] || (registry[id] = makeEl(id));
}
let store = {};
let createdEls = []; // shim ext: createElement tracking (validate() appends its .err div this way)
function buildShim() {
  registry = {}; store = {}; createdEls = [];
  global.document = {
    title: '',
    querySelector: q,
    querySelectorAll: () => [],
    addEventListener() { },
    createElement: (t) => { const e = makeEl('el-' + t); createdEls.push(e); return e; },
    getElementById: (id) => registry[id] || (registry[id] = makeEl(id)), // shim ext: app.js scrim/panel sync (Fix 3) + i18n lang buttons
    documentElement: { style: { setProperty() { } }, setAttribute() { }, lang: 'en' }, // i18n applyI18n + app syncSheetH
  };
  global.localStorage = { getItem: k => store[k] || null, setItem: (k, v) => { store[k] = String(v); }, removeItem: k => { delete store[k]; } };
  global.location = { hash: '', pathname: '/index.html', origin: 'http://x' };
  global.history = { replaceState() { } };
  Object.defineProperty(global, 'navigator', { value: { language: 'en-CA' }, configurable: true });
  global.window = { scrollTo() { }, print() { }, prompt() { } }; // prompt stub: Fix 7 share fallback
  global.confirm = () => true;
  global.fetch = () => Promise.resolve({ ok: true, json: () => Promise.resolve({}) });
}
function load(lang) {
  buildShim();
  global.window.RetireEngine = require(path.join(SITE, 'engine', 'engine.js'));
  global.window.RetireCanada = require(path.join(SITE, 'engine', 'canada.js'));
  // persisted state in the target language: fresh answers, dropped at the quiz start
  store[LS] = JSON.stringify({ a: {}, step: 0, screen: 'quiz', lang: lang });
  eval(fs.readFileSync(path.join(SITE, 'i18n.js'), 'utf8'));
  eval(fs.readFileSync(path.join(SITE, 'app.js'), 'utf8'));
}

let fails = 0, total = 0;
function ok(name, cond, extra) {
  total++;
  console.log((cond ? '  PASS  ' : '  FAIL  ') + name + (extra !== undefined ? '  [' + String(extra).slice(0, 80) + ']' : ''));
  if (!cond) fails++;
}
const click = id => { const el = q('#' + id); if (!el._l.click) throw new Error('no click handler on #' + id); el._l.click(); };

/* drive the full quiz → results flow for one language, then run per-language checks. */
function run(lang, M, done) {
  console.log('\n--- ' + lang.toUpperCase() + ' ---');
  load(lang);

  ok('intro wiring: begin button has handler', !!q('#btn-begin')._l.click);
  click('btn-begin');
  ok('step 1 title', M.title.test(q('#step-body')._html), N(q('#step-body')._html).slice(0, 60));
  ok('step count', /1 \/ 14/.test(q('#step-count').textContent), q('#step-count').textContent);
  ok('province step requires a pick (Next disabled)', q('#btn-next').disabled === true);
  ok('validation message', createdEls.some(e => M.needProvince.test(N(e.textContent))));

  // emulate the option click path (shim querySelectorAll patched to hand back one opt)
  const opt = makeEl('opt'); opt.dataset.v = 'ON';
  q('#step-body').querySelectorAll = (sel) => (sel === '.opt' ? [opt] : []);
  click('btn-begin'); // re-render step with patched querySelectorAll
  opt._l.click();
  ok('province ON selectable', q('#btn-next').disabled === false);

  // walk all steps (original gating: disabled reflects step validity)
  let guard = 0, sawCpp = false, sawSeePlan = false;
  while (guard++ < 40 && !q('#btn-next').disabled) {
    const h = N(q('#step-body')._html);
    if (M.cppStep.test(h)) sawCpp = true;
    if (M.seePlan.test(q('#btn-next').textContent)) { sawSeePlan = true; break; }
    click('btn-next');
    if (q('#scr-results').hidden === false) break;
  }
  ok('reached last step (See my plan / Voir mon plan)', sawSeePlan, 'steps=' + guard);
  ok('CPP start step seen', sawCpp);
  click('btn-next');
  ok('reached results screen', q('#scr-results').hidden === false);

  const verdict = N(q('#verdict')._html);
  ok('verdict rendered', M.verdict.test(verdict), verdict.slice(0, 70));
  ok('gap cards rendered', /gcard/.test(q('#gap-cards')._html));
  ok('G1 chart is inline SVG', /<svg/.test(q('#g1')._html));
  ok('G1 title localized', M.g1Title.test(N(q('#g1')._html)), N(q('#g1')._html).slice(0, 50));
  ok('G2 chart is inline SVG', /<svg/.test(q('#g2')._html));
  ok('G2 legend localized', M.g2Legend.test(q('#g2')._html));
  ok('G3 chart is inline SVG', /<svg/.test(q('#g3')._html));
  ok('year table has rows', (q('#yr-table')._html.match(/<tr/g) || []).length > 20);
  ok('year table header localized', M.tblHeader.test(q('#yr-table')._html));
  ok('year summary localized', M.yrSummary.test(N(q('#yr-summary')._html)), N(q('#yr-summary')._html));
  const stamp = N(q('#stamp').textContent);
  ok('stamp has 2026 + CPP max (locale format)', M.stamp2026.test(stamp) && M.stampCpp.test(stamp), stamp.slice(0, 80));
  ok('vision card rendered', M.vision.test(q('#vision-card')._html));
  ok('document.title localized', M.docTitle.test(N(document.title)), document.title.slice(0, 60));

  // G4 async (setTimeout 30ms) + live panel (120ms)
  setTimeout(() => {
    ok('G4 scenario bars rendered', /<svg/.test(q('#g4')._html) && M.g4Scen.test(q('#g4')._html), N(q('#g4')._html).slice(0, 60));
    ok('live panel chips localized', M.panel.test(N(q('#panel-chips')._html)), N(q('#panel-chips')._html).slice(0, 70));
    // what-if slider re-render
    const wi = q('#wi-spend'); wi.value = '95000';
    wi._l.input && wi._l.input.call(wi);
    setTimeout(() => {
      ok('what-if slider updates spending label (95k)', /95/.test(N(q('#wi-spend-o').textContent)), N(q('#wi-spend-o').textContent));
      ok('wi label localized', M.wiCtrb.test(N(q('#wi-ctrb-o').textContent)), N(q('#wi-ctrb-o').textContent));
      ok('localStorage saved with lang', JSON.parse(store[LS]).lang === lang);
      done();
    }, 500);
  }, 250);
}

const EN = {
  title: /Where do you live/,
  docTitle: /Retire Planner/,
  needProvince: /Pick a province/,
  seePlan: /See my plan/,
  cppStep: /Start CPP/,
  verdict: /money|sustain|runs out/,
  g1Title: /Will it last/,
  g2Legend: /From savings/,
  tblHeader: /Withdraw/,
  yrSummary: /Year-by-year detail \(\d+ years\)/,
  stamp2026: /tax rates 2026/, stampCpp: /1,507\.65/,
  vision: /Retirement Vision/,
  g4Scen: /Current plan/,
  panel: /Savings at retirement/,
  wiCtrb: /\/mo/,
};
const FR = {
  title: /Où habitez-vous/,
  docTitle: /Planificateur de retraite/,
  needProvince: /Choisissez une province/,
  seePlan: /Voir mon plan/,
  cppStep: /Débuter la RPC/,
  verdict: /manquez d.argent|dépenser en toute sûreté|tient jusqu/,
  g1Title: /épargne tiendra-t-elle/,
  g2Legend: /Épargne/,
  tblHeader: /Retrait/,
  yrSummary: /Détail année par année \(\d+ ans\)/,
  stamp2026: /barèmes 2026/, stampCpp: /1 507,65/,
  vision: /Vision de retraite/,
  g4Scen: /Plan actuel/,
  panel: /Épargne à la retraite/,
  wiCtrb: /\/mois/,
};

run('en', EN, () => run('fr', FR, () => {
  ok('EN privacy line present in index.html', /never leave your browser/.test(fs.readFileSync(path.join(SITE, 'index.html'), 'utf8')));
  ok('FR privacy string present in i18n.js', /ne quittent jamais votre navigateur/.test(fs.readFileSync(path.join(SITE, 'i18n.js'), 'utf8')));
  console.log(fails ? '\nSMOKE-FAIL: ' + fails + ' of ' + total : '\nSMOKE-OK all ui smoke checks passed (' + total + ')');
  process.exit(fails ? 1 : 0);
}));