// The video pager's seek bar shows only on the clip square on the screen:
// while the pager is in motion — a glide to the next clip, a finger
// dragging the slides, the snap back — no seek bar shows at all (it rode
// along with the slide, a white line sliding up the screen), and it fades
// back in once the clip has landed. The position counter is the other way
// round: it shows while the pager moves and fades out once it has settled.
// Run: bun tools/pager-seek-hide-test.js
import puppeteer from './puppeteer.js';
import { cacheKeyFor } from '../src/wallet.js';
import { generateSecretKey, getPublicKey, finalizeEvent } from 'nostr-tools/pure';
import { buildHtml } from '../build.js';
import { existsSync } from 'node:fs';
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
let ok = true;
const check = (n, c, d = '') => { console.log(` ${c ? '✓' : '✗'} ${n}${d ? ' — ' + d : ''}`); if (!c) ok = false; };
const png = Bun.spawnSync(['ffmpeg', '-loglevel', 'error', '-f', 'lavfi', '-i', 'testsrc=size=320x180', '-frames:v', '1', '-f', 'image2', '-c:v', 'png', 'pipe:1']).stdout;
const clip = (name, size) => {
  const f = '/tmp/coinos-vpager-' + name + '.webm';
  if (!existsSync(f)) Bun.spawnSync(['ffmpeg', '-y', '-loglevel', 'error', '-f', 'lavfi', '-i', 'testsrc=size=' + size + ':rate=10', '-t', '30', '-c:v', 'libvpx', '-b:v', '100k', f]);
  return f;
};
const CLIPS = { wide: clip('wide', '320x180'), tall: clip('tall', '180x320'), last: clip('last', '240x240') };
const SK = generateSecretKey(), AUTHOR = getPublicKey(SK);
const now = Math.floor(Date.now() / 1000);
const html = await buildHtml({ minify: true, pwa: false });
const server = Bun.serve({ port: 0, fetch: (req) => {
  const path = new URL(req.url).pathname;
  const m = /^\/(wide|tall|last)\.webm$/.exec(path);
  if (m) {
    const f = Bun.file(CLIPS[m[1]]), range = /^bytes=(\d+)-(\d*)$/.exec(req.headers.get('range') || '');
    if (!range) return new Response(f, { headers: { 'content-type': 'video/webm', 'accept-ranges': 'bytes' } });
    const a = +range[1], b = range[2] ? Math.min(+range[2], f.size - 1) : f.size - 1;
    return new Response(f.slice(a, b + 1), { status: 206, headers: { 'content-type': 'video/webm', 'accept-ranges': 'bytes', 'content-range': 'bytes ' + a + '-' + b + '/' + f.size, 'content-length': String(b - a + 1) } });
  }
  if (path === '/still.png') return new Response(png, { headers: { 'content-type': 'image/png' } });
  if (path.startsWith('/punks') || path === '/verify-worker.js') return new Response(Bun.file('dist' + path));
  return new Response(html, { headers: { 'content-type': 'text/html' } });
} });
const U = (n) => server.url.origin + '/' + n + '.webm';
const post = (content, url, ago) => finalizeEvent({ kind: 1, created_at: now - ago, tags: [['imeta', 'url ' + url, 'image ' + server.url.origin + '/still.png', 'm video/webm']], content }, SK);
const seeded = [post('a wide one ' + U('wide'), U('wide'), 100), post('a tall one ' + U('tall'), U('tall'), 200), post('the last clip ' + U('last'), U('last'), 400)];

const browser = await puppeteer.launch({ executablePath: '/usr/bin/google-chrome', headless: 'new', args: ['--no-sandbox', '--autoplay-policy=no-user-gesture-required'] });
const page = await browser.newPage();
await page.evaluateOnNewDocument(() => {
  const Real = window.WebSocket;
  window.WebSocket = function (...a) { const ws = new Real(...a); const send = ws.send.bind(ws); ws.send = (d) => { try { const m = JSON.parse(d); if (m[0] === 'REQ') { setTimeout(() => ws.dispatchEvent(new MessageEvent('message', { data: JSON.stringify(['EOSE', m[1]]) })), 0); return; } if (m[0] === 'EVENT') return; } catch {} return send(d); }; return ws; };
  window.WebSocket.prototype = Real.prototype; Object.assign(window.WebSocket, Real);
});
const errs = [];
page.on('pageerror', (e) => errs.push(String(e)));
const click = (t) => page.evaluate((x) => { const e = [...document.querySelectorAll('button')].find((n) => n.textContent.trim().toLowerCase().includes(x)); if (e) { e.click(); return true; } return false; }, t);
const waitText = async (x, ms = 25000) => { for (let i = 0; i < ms / 250; i++) { if ((await page.evaluate(() => document.body.innerText)).toLowerCase().includes(x)) return true; await sleep(250); } return false; };
const waitFor = async (fn, arg, ms = 10000) => { for (let i = 0; i < ms / 100; i++) { if (await page.evaluate(fn, arg)) return true; await sleep(100); } return false; };
// each slide's bar: its clip, whether it is the one on screen, whether the bar can be seen
const bars = () => page.evaluate(() => [...document.querySelectorAll('.mp-slide')].map((s) => { const b = s.querySelector('.mp-seek'), cs = getComputedStyle(b); return { clip: s.getAttribute('data-k').split('/').pop(), cur: s.classList.contains('mp-cur'), seen: cs.visibility === 'visible' && +cs.opacity > 0.01, opacity: cs.opacity, ready: b.classList.contains('ready') }; }));
const seenBars = async () => (await bars()).filter((x) => x.seen).map((x) => x.clip + '@' + x.opacity);
// a recorder, frame by frame: the scroll position, the pager's motion flag, and any bar that can be seen
const record = () => page.evaluate(() => { const sc = document.querySelector('.mp-scroll'), el = document.querySelector('.media-pager'); window.__tr = []; const t0 = performance.now(); const rec = () => { window.__tr.push({ top: sc.scrollTop, moving: el.classList.contains('moving'), seen: [...document.querySelectorAll('.mp-seek')].filter((b) => { const cs = getComputedStyle(b); return cs.visibility === 'visible' && +cs.opacity > 0.01; }).length }); if (performance.now() - t0 < 1500) requestAnimationFrame(rec); }; requestAnimationFrame(rec); });
const trace = () => page.evaluate(() => window.__tr);
const counterOpacity = () => page.evaluate(() => +getComputedStyle(document.querySelector('.mp-position')).opacity);

try {
  await page.setViewport({ width: 390, height: 844, hasTouch: true });
  await page.goto(server.url.href, { waitUntil: 'domcontentloaded' });
  await page.evaluate(() => localStorage.setItem('btc-wallet-network', 'regtest'));
  await page.reload({ waitUntil: 'domcontentloaded' });
  await sleep(400);
  await click('create a new wallet'); await sleep(600);
  await page.waitForSelector('.words .w .t');
  const mn = (await page.$$eval('.words .w .t', (l) => l.map((e) => e.textContent.trim()))).join(' ');
  await click('skip verification');
  await waitText('receive', 20000);
  const base = cacheKeyFor(mn + '\n');
  await page.evaluate(([k, pk, ns]) => {
    localStorage.setItem(k + ':follows', JSON.stringify({ tags: [['p', pk]], c: '', at: Math.floor(Date.now() / 1000) }));
    localStorage.setItem(k + ':feedNotes', JSON.stringify(ns));
    localStorage.setItem(k + ':profiles', JSON.stringify({ [pk]: { name: 'Clip Poster', t: Date.now() } }));
    localStorage.setItem('btc-wallet-feed:' + k, 'following');
  }, [base, AUTHOR, seeded]);
  await page.reload({ waitUntil: 'domcontentloaded' });
  await waitText('receive', 20000);
  await page.evaluate(() => document.querySelector('.app-nav-button[aria-label="Feed"]').click());
  check('the clips are in the feed', await waitFor(() => document.querySelectorAll('.notes-feed video.note-video').length >= 3, null, 20000));
  await page.evaluate(() => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes('a wide one')); r.querySelector('video.note-video').scrollIntoView({ block: 'center' }); });
  await sleep(400);
  const at = await page.evaluate(() => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes('a wide one')); const b = r.querySelector('video.note-video').getBoundingClientRect(); return { x: b.x + b.width * 0.2, y: b.y + b.height * 0.3 }; });
  await page.mouse.click(at.x, at.y);
  check('the pager opens', await waitFor(() => !!document.querySelector('.media-pager.videos .mp-slide'), null, 4000));

  console.log('\n[at rest: the clip on screen has its seek bar]');
  check('the clip on screen plays', await waitFor(() => [...document.querySelectorAll('.mp-slide.mp-cur video.mp-media')].some((v) => !v.paused), null, 8000));
  check('…and its seek bar shows', await waitFor(() => { const b = document.querySelector('.mp-slide.mp-cur .mp-seek'); return !!b && b.classList.contains('ready') && getComputedStyle(b).opacity === '1'; }, null, 6000), JSON.stringify(await bars()));
  check('…no other', (await seenBars()).length === 1, (await seenBars()).join(' '));
  check('the pager is not marked moving', await page.evaluate(() => !document.querySelector('.media-pager').classList.contains('moving')));
  check('the position counter has faded out', await waitFor(() => +getComputedStyle(document.querySelector('.mp-position')).opacity < 0.01, null, 4000), String(await counterOpacity()));

  console.log('\n[a glide to the next clip: no seek bar on the way]');
  await record();
  await page.keyboard.press('ArrowDown');
  await sleep(1600);
  const tr = await trace();
  const between = tr.filter((f) => f.top > 2 && Math.abs(f.top - 844) > 2 && f.top < 844);
  check('the glide was seen frame by frame', between.length >= 3, between.length + ' frames between the two clips');
  check('…every one of them with the pager marked moving', between.every((f) => f.moving), between.map((f) => (f.moving ? 'm' : '-')).join(''));
  check('…and not one seek bar to be seen', between.every((f) => f.seen === 0), between.map((f) => f.seen).join(''));
  const landedOn = await waitFor(() => { const s = document.querySelector('.mp-slide.mp-cur'); return !!s && s.getAttribute('data-k').endsWith('/tall.webm'); }, null, 4000);
  check('it lands on the next clip', landedOn);
  check('…whose seek bar fades back in', await waitFor(() => { const b = document.querySelector('.mp-slide.mp-cur .mp-seek'); return !!b && getComputedStyle(b).opacity === '1'; }, null, 6000), JSON.stringify(await bars()));
  check('…the one before, now off screen, shows none', (await bars()).filter((x) => x.clip === 'wide.webm').every((x) => !x.seen), JSON.stringify(await bars()));
  check('the pager is not marked moving once landed', await page.evaluate(() => !document.querySelector('.media-pager').classList.contains('moving')));

  console.log('\n[a finger holding the slides off their mark: none either]');
  await page.touchscreen.touchStart(195, 600);
  await page.touchscreen.touchMove(195, 560); await sleep(30);
  await page.touchscreen.touchMove(195, 500); await sleep(250);
  check('held 100px up, the pager is marked moving', await page.evaluate(() => document.querySelector('.media-pager').classList.contains('moving')));
  check('…and no seek bar shows', (await seenBars()).length === 0, (await seenBars()).join(' '));
  check('…and the position counter is back', (await counterOpacity()) === 1, String(await counterOpacity()));
  await page.touchscreen.touchMove(195, 590); await sleep(30);
  await page.touchscreen.touchEnd();
  check('let go, it snaps back and the bar returns', await waitFor(() => { const b = document.querySelector('.mp-slide.mp-cur .mp-seek'); const el = document.querySelector('.media-pager'); return !!b && getComputedStyle(b).opacity === '1' && !el.classList.contains('moving') && document.querySelector('.mp-slide.mp-cur').getAttribute('data-k').endsWith('/tall.webm'); }, null, 4000), JSON.stringify(await bars()));
  await sleep(500);
  check('a moment after, the counter still shows', (await counterOpacity()) > 0.99, String(await counterOpacity()));
  check('…then fades out', await waitFor(() => +getComputedStyle(document.querySelector('.mp-position')).opacity < 0.01, null, 4000), String(await counterOpacity()));
  check('no page errors', errs.length === 0, errs.slice(0, 2).join(' | '));
} catch (e) { console.error(e); ok = false; } finally { await browser.close(); server.stop(true); }
console.log(ok ? '\n✅ no seek bar while the pager moves; it fades in on landing' : '\n❌ failed');
process.exit(ok ? 0 : 1);