// A picture tapped in the feed opens in the media pager, on that picture:
// swipes and arrows (all four) step through the feed's pictures, every one
// of a post before the next post's. A tap on the picture that opened it
// closes it, as before; once the reader has moved on, a tap shows the post's
// details and the next tap (or Escape) closes the pager onto that post.
// Run: bun tools/feed-picture-pager-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') };

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)\.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('filler ' + i + ' ' + 'lorem ipsum dolor sit amet. '.repeat(5), 500 + i * 60)),
];

const browser = await puppeteer.launch({ executablePath: '/usr/bin/google-chrome', headless: 'new', args: ['--no-sandbox'] });
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) => 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: 390, height: 844 });
  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));

  console.log('\n[a tap on the picture that opened it closes it]');
  const y0 = await openPic('two pictures');
  check('the picture opens in the pager, on itself', await resting('a1.png'), await curPic());
  check('no details until a tap', await page.evaluate(() => !document.querySelector('.media-pager').classList.contains('show')));
  await tapPager(); await sleep(600);
  check('one tap closes it', await waitFor(() => !document.querySelector('.media-pager'), null, 3000));
  check('the feed is where it was', Math.abs((await page.evaluate(() => window.scrollY)) - y0) <= 2);

  console.log('\n[left and right: along a post\'s pictures; up and down: post to post]');
  await openPic('two pictures');
  check('a post with two pictures shows two dots, the first lit', await page.evaluate(() => { const d = document.querySelector('.mp-group .mp-dots'); return d && d.children.length === 2 && d.children[0].classList.contains('on'); }));
  await page.keyboard.press('ArrowRight');
  check('right: the post\'s second picture', await resting('a2.png'), await curPic());
  check('…its dot lit', await page.evaluate(() => { const d = document.querySelector('.mp-group .mp-dots'); return d.children[1].classList.contains('on') && !d.children[0].classList.contains('on'); }));
  await page.keyboard.press('ArrowRight'); await sleep(600);
  check('right at the post\'s last: stays (left and right stay in the post)', (await curPic()) === 'a2.png', await curPic());
  await page.keyboard.press('ArrowDown');
  check('down: the next post\'s picture', await resting('b.png'), await curPic());
  await page.keyboard.press('ArrowDown');
  check('down again: the next, past a post with none', await resting('d.png'), await curPic());
  await page.keyboard.press('ArrowUp');
  check('up: back one post', await resting('b.png'), await curPic());
  await page.keyboard.press('ArrowUp');
  check('up again: the first post, on the picture it was left at', await resting('a2.png'), await curPic());
  await page.keyboard.press('ArrowLeft');
  check('left: its first picture', await resting('a1.png'), await curPic());
  check('no history entry per step', await page.evaluate(() => history.length) < 50);

  console.log('\n[moved on: a tap shows the post, the next closes onto it]');
  await page.keyboard.press('ArrowDown'); await resting('b.png');
  await tapPager(); await sleep(400);
  check('the first tap shows the details', await page.evaluate(() => document.querySelector('.media-pager')?.classList.contains('show')));
  check('…with the author and the words', 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; }); return /Picture Poster/.test(s.textContent) && /one picture/.test(s.textContent); }));
  await tapPager();
  check('the second tap closes it', await waitFor(() => !document.querySelector('.media-pager') && !!document.querySelector('.notes-feed'), null, 3000));
  await waitFor((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); return r && r.getBoundingClientRect().top < 120 && r.getBoundingClientRect().top > -10; }, 'one picture', 3000);
  check('…and the feed sits on that post', (await rowTop('one picture')) !== null && (await rowTop('one picture')) < 120 && (await rowTop('one picture')) > -10, 'row top ' + (await rowTop('one picture')));

  console.log('\n[a swipe, then Escape]');
  await page.evaluate(() => window.scrollTo(0, 0)); await sleep(300);
  await openPic('two pictures');
  await page.evaluate(() => { const r = document.querySelector('.mp-row'); r.scrollTo({ left: r.clientWidth }); }); // what a swipe to the left does
  check('a sideways swipe lands on the post\'s next picture', await resting('a2.png'), await curPic());
  await page.evaluate(() => { const sc = document.querySelector('.mp-scroll'); sc.scrollTo({ top: sc.clientHeight }); }); // what a swipe up does
  check('a swipe up lands on the next post\'s', await resting('b.png'), await curPic());
  await page.keyboard.press('ArrowDown'); await resting('d.png');
  await page.keyboard.press('Escape');
  check('Escape closes it', await waitFor(() => !document.querySelector('.media-pager') && !!document.querySelector('.notes-feed'), null, 3000));
  await waitFor((w) => { const r = [...document.querySelectorAll('.notes-feed [data-key]')].find((n) => n.textContent.includes(w)); return r && r.getBoundingClientRect().top < 120 && r.getBoundingClientRect().top > -10; }, 'a last picture', 3000);
  check('…onto the last picture\'s post', (await rowTop('a last picture')) !== null && (await rowTop('a last picture')) < 120 && (await rowTop('a last picture')) > -10, 'row top ' + (await rowTop('a last picture')));
  check('no page errors', errs.length === 0, errs.slice(0, 2).join(' | '));
} finally { await browser.close(); server.stop(true); }
console.log(ok ? '\n✅ feed pictures page like the media grid\'s' : '\n❌ failed');
process.exit(ok ? 0 : 1);