// Builds a page from web/src as build.rs does, runs its script against a stub DOM, and fails
// on anything thrown: web/index.html, then web/admin.html in a second run of this file.
//
// This exists because a ReferenceError at load once blanked the whole UI: a patch
// anchored on a function that no longer existed, so `prefsModal` was referenced but
// never defined. `node --check` passes that happily -- it is a parse, not a run --
// and every server-side test passed too, because the server was fine.
//
//   node tests/page-smoke.js
const { makeContext, vm } = require('./dom-stub.js');
const PAGE = process.argv[2] || 'index.html';

const { buildPage } = require('../web/build.mjs');
// What ships: minified, so an id may have lost its quotes.
const { html, js: script, script: file } = buildPage(PAGE);
if (!/<link rel=stylesheet href="?\/app\.css\?v=[0-9a-f]{12}"?>/.test(html) && PAGE !== 'login.html') {
  console.error(`FAIL: ${PAGE} does not load /app.css?v=<hash>`); process.exit(1);
}
if (!new RegExp(`<script src="?/${file.replace('.', '\\.')}\\?v=[0-9a-f]{12}"?>`).test(html)) {
  console.error(`FAIL: the page does not load /${file}?v=<hash>`); process.exit(1);
}
const { ctx, missing } = makeContext(html, script);

try {
  vm.createContext(ctx);
  vm.runInContext(script, ctx, { filename: `${PAGE}<script>`, timeout: 5000 });
} catch (e) {
  console.error('FAIL: the page script threw while loading\n  ' + e.stack.split('\n').slice(0, 3).join('\n  '));
  process.exit(1);
}

// The modals are built on demand, so a load-time check never reaches them. Drive the
// ones that construct markup from live data, which is where a bad field reference hides.
const feed = {
  id: 'f', url: 'https://x/rss', title: 'A Feed', image: null, folder: null,
  keywords: ['a'], allow_explicit: false, auto_download: true, max_new_per_check: 3,
  schedule: 'every 6h', schedule_mins: 360, every_mins: 360,
  last_checked: 1, next_check: 2, entries: 1, downloaded: 0, unread: 1, last_error: null,
};
const drive = PAGE === 'admin.html' ? [
  ['drawServer', () => ctx.drawServer()],
  ['drawAccounts', () => ctx.drawAccounts()],
  ['drawLogView', () => ctx.drawLogView()],
] : [
  ['settingsModal', () => ctx.settingsModal(feed)],
  ['settingsModal (no override)', () => ctx.settingsModal({ ...feed, schedule: null, schedule_mins: null })],
  ['downloadLatestModal', () => ctx.downloadLatestModal(feed)],
  ['removeFeed', () => ctx.removeFeed(feed)],
  ['prefsModal', () => ctx.prefsModal()],
  ['opmlModal', () => ctx.opmlModal()],
  ['selectFeed (directory)', () => ctx.selectFeed(':directory')],
  ['selectFeed (popular)', () => ctx.selectFeed(':popular')],
  ['selectFeed (currently listening)', () => ctx.selectFeed(':listening')],
  ['selectFeed (all subscriptions)', () => ctx.selectFeed(':all')],
  ['keysModal', () => ctx.keysModal()],
  // `const S` is not reachable from here: top-level const/let do not become properties
  // of a vm context the way var and function declarations do.
  ['renderGroup', () => ctx.renderGroup(feed, [{ ...feed, id: 'child', group: 'f', orphaned: true }])],
];
for (const [name, fn] of drive) {
  try {
    const r = fn();
    if (r && typeof r.catch === 'function') r.catch(e => {
      console.error(`FAIL: ${name} rejected: ${e.message}`); process.exit(1);
    });
  } catch (e) {
    console.error(`FAIL: ${name} threw: ${e.message}`);
    process.exit(1);
  }
}

// theme.ts keeps the Settings theme controls in step when Settings is open, and looks before it
// touches them. The admin page has no Settings, so those are the ones it may ask for and not find.
const OPTIONAL = new Set(['#stheme', '#smode', '#smodefield']);
missing.splice(0, missing.length, ...missing.filter(sel => !OPTIONAL.has(sel)));
if (missing.length) {
  console.error('FAIL: handlers wired to elements that do not exist: ' + [...new Set(missing)].join(', '));
  process.exit(1);
}
console.log(`OK: ${PAGE}: its script loads clean, every selector it wires at load exists`);
// The admin page's log arms a poll timer; without an exit the pending interval keeps node alive.
if (PAGE === 'index.html') {
  const r = require('child_process').spawnSync(process.execPath, [__filename, 'admin.html'], { stdio: 'inherit' });
  process.exit(r.status);
}
process.exit(0);