// The pager keeps its post when the screen changes size: the page going
// full screen for it (a taller window, the address bar gone), or a turn of
// the phone. Posts are a screen tall, so a pixel scroll position deep in
// the pager lands in another post after a resize — Adam's full-screen
// button on a clip 23 posts down showed him another post's picture. The
// resize can come before the observer has even named the first slide.
// Run: bun tools/pager-resize-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';
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 = (size) => Bun.spawnSync(['ffmpeg', '-loglevel', 'error', '-f', 'lavfi', '-i', 'testsrc=size=' + size, '-frames:v', '1', '-f', 'image2', '-c:v', 'png', 'pipe:1']).stdout;
const PICS = { a1: png('400x300'), a2: png('300x400'), b: png('320x320'), d: png('360x240'), e: png('240x180') };

const SK = generateSecretKey(), AUTHOR = getPublicKey(SK);
const now = Math.floor(Date.now() / 1000);
const post = (content, ago) => finalizeEvent({ kind: 1, created_at: now - ago, tags: [], content }, SK);
const html = await buildHtml({ minify: true, pwa: false });
const server = Bun.serve({ port: 0, fetch: (req) => {
  const path = new URL(req.url).pathname;
  if (path.startsWith('/punks')) return new Response(Bun.file('dist' + path));
  const m = /^\/(a1|a2|b|d|e)\d*\.png$/.exec(path);
  if (m) return new Response(PICS[m[1]], { headers: { 'content-type': 'image/png' } });
  return new Response(html, { headers: { 'content-type': 'text/html' } });
} });
const U = (n) => server.url.origin + '/' + n + '.png';
const seeded = [
  post('two pictures ' + U('a1') + ' ' + U('a2'), 100),
  post('one picture ' + U('b'), 200),
  post('only words here, nothing to look at', 300),
  post('a last picture ' + U('d'), 400),
  ...Array.from({ length: 12 }, (_, i) => post('more ' + i + ' ' + U('e' + i), 500 + i * 60)), // a dozen more, one picture each, for a flight
];

const browser = await puppeteer.launch({ executablePath: '/usr/bin/google-chrome', headless: 'new', args: ['--no-sandbox', '--blink-settings=primaryHoverType=2,availableHoverTypes=2,primaryPointerType=4,availablePointerTypes=4'] /* a pointer that hovers: headless has none */ });
const page = await browser.newPage();
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; };
// the slide the pager rests on, by its picture
const curPic = () => page.evaluate(() => {
  const sc = document.querySelector('.mp-scroll'); if (!sc) return null;
  const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; });
  return s ? s.getAttribute('data-k').split('|')[1].split('/').pop() : 'between';
});
const resting = async (name) => rested(name).then(async (r) => { await sleep(260); return r; }); // a breath after: the wheel's gate between steps
const rested = async (name) => waitFor((n) => { const sc = document.querySelector('.mp-scroll'); if (!sc) return false; const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }); return !!s && s.getAttribute('data-k').endsWith('/' + n); }, name, 4000);
const openPic = async (word) => {
  await page.evaluate((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); r.scrollIntoView({ block: 'center' }); }, word);
  await sleep(400);
  const at = await page.evaluate((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); const i = r.querySelector('img.note-img').getBoundingClientRect(); return { x: i.x + i.width / 2, y: i.y + i.height / 2, y0: window.scrollY }; }, word);
  await page.mouse.click(at.x, at.y);
  await waitFor(() => !!document.querySelector('.media-pager'), null, 4000);
  return at.y0;
};
const tapPager = async () => { const at = await page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }) || sc.firstChild; const r = s.querySelector('img.mp-media').getBoundingClientRect(); return { x: r.x + r.width / 2, y: r.y + r.height / 2 }; }); await page.mouse.click(at.x, at.y); };
const rowTop = (word) => page.evaluate((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); return r ? Math.round(r.getBoundingClientRect().top) : null; }, word);

try {
  await page.setViewport({ width: 1280, height: 900 });
  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: 'Picture 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 pictures are in the feed', await waitFor(() => document.querySelectorAll('.notes-feed img.note-img').length >= 4, null, 20000));
  const cdp = await page.target().createCDPSession();
  // a trackpad's run: small deltas, page-side — a CDP mouseWheel is always a 120-unit notch to Chrome
  const pad = (dy, n) => page.evaluate(async ([dy, n]) => { const sc = document.querySelector('.mp-scroll'); for (let i = 0; i < n; i++) { const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }) || sc.firstChild; const ev = new WheelEvent('wheel', { deltaY: dy, deltaX: 0, deltaMode: 0, bubbles: true, cancelable: true, clientX: 640, clientY: 450 }); Object.defineProperty(ev, 'wheelDeltaY', { value: -Math.round(dy * 1.2) }); s.querySelector('img.mp-media').dispatchEvent(ev); await new Promise((r) => setTimeout(r, 16)); } }, [dy, n]);
  const pos = () => page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); return sc ? Math.round(sc.scrollTop) + '/' + sc.clientHeight + ' glide:' + !!sc._glide + ' snap:' + sc.style.scrollSnapType : 'none'; });
  const wheel = (dy, { dx = 0, mods = 0 } = {}) => cdp.send('Input.dispatchMouseEvent', { type: 'mouseWheel', x: 640, y: 450, deltaX: dx, deltaY: dy, modifiers: mods });
  const zoomOf = () => page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }); const m = /scale\(([\d.]+)\)/.exec(s.querySelector('img.mp-media').style.transform || ''); return m ? Number(m[1]) : 1; });
  const shiftOf = () => page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }); const m = /translate\(([-\d.]+)px, ([-\d.]+)px\)/.exec(s.querySelector('img.mp-media').style.transform || ''); return m ? [Number(m[1]), Number(m[2])] : [0, 0]; });

  console.log('\n[the screen grows right as the pager opens]');
  // the feed draws a window of rows: scroll down until the post is drawn
  for (let i = 0; i < 40; i++) {
    if (await page.evaluate((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); if (!r) return false; r.scrollIntoView({ block: 'center' }); return true; }, 'more 8')) break;
    await page.evaluate(() => window.scrollBy(0, 1500)); await sleep(300);
  }
  await sleep(500);
  const at = await page.evaluate((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); const i = r.querySelector('img.note-img').getBoundingClientRect(); return { x: i.x + i.width / 2, y: i.y + i.height / 2 }; }, 'more 8');
  await page.mouse.click(at.x, at.y);
  await waitFor(() => !!document.querySelector('.media-pager'), null, 4000);
  // the window grows (full screen) before the pager's observer has named a slide
  await page.setViewport({ width: 1280, height: 1040 });
  check('the pager rests on the picture tapped, eleven posts down', await resting('e8.png'), await curPic() + ' ' + await pos());
  await sleep(600);
  check('…and stays there', (await curPic()) === 'e8.png', await curPic());
  console.log('\n[a later resize]');
  await page.keyboard.press('ArrowDown'); await resting('e9.png');
  await page.setViewport({ width: 1280, height: 780 });
  check('the window shrinks: still on the post the reader moved to', await resting('e9.png'), await curPic() + ' ' + await pos());
  await page.setViewport({ width: 1280, height: 1100 });
  check('…and grows again: still there', await resting('e9.png'), await curPic() + ' ' + await pos());
  await page.keyboard.press('ArrowUp'); await resting('e8.png');
  await page.setViewport({ width: 900, height: 1200 });
  check('a different shape: still on the post', await resting('e8.png'), await curPic() + ' ' + await pos());
  console.log('\n[a wide window: the words and counts keep to the middle]');
  await page.setViewport({ width: 1920, height: 600 });
  await resting('e8.png');
  await page.keyboard.press('ArrowDown'); await resting('e9.png'); // moved on from the start: a tap shows the details (on the start it closes)
  await page.mouse.click(960, 300); await sleep(400);
  const geo = await page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }); const r = (q) => { const e = s.querySelector(q); const b = e.getBoundingClientRect(); return [Math.round(b.left), Math.round(b.right)]; }; return { show: document.querySelector('.media-pager').classList.contains('show'), left: r('.mp-left'), counts: r('.mp-counts'), meta: r('.mp-meta') }; });
  check('the details are up', geo.show);
  check('the words start near the middle column, not the screen\'s edge', geo.left[0] >= 560 && geo.left[0] <= 600, JSON.stringify(geo));
  check('the counts sit at the column\'s edge, not the screen\'s corner', geo.counts[1] >= 1320 && geo.counts[1] <= 1360, JSON.stringify(geo));
  check('the gradient still spans the screen', geo.meta[0] === 0 && geo.meta[1] === 1920, JSON.stringify(geo));
  await page.setViewport({ width: 390, height: 844 }); await sleep(300);
  const narrow = await page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); const s = [...sc.querySelectorAll('.mp-slide')].find((x) => { const r = x.getBoundingClientRect(); return Math.abs(r.top) < 4 && Math.abs(r.left) < 4; }); const b = s.querySelector('.mp-left').getBoundingClientRect(); return [Math.round(b.left), Math.round(s.querySelector('.mp-counts').getBoundingClientRect().right)]; });
  check('a phone keeps the full width', narrow[0] <= 16 && narrow[1] >= 370, JSON.stringify(narrow));
  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✅ the pager keeps its post through a resize' : '\n❌ failed');
process.exit(ok ? 0 : 1);