// CDP probe for the widget gallery — no playwright, Node global WebSocket/fetch.
// Usage: node probe.mjs [--shot out.png] [--size N]
import { spawn } from 'node:child_process';
import { writeFileSync } from 'node:fs';

const PORT = 9333;
const URL = 'file:///home/cjennings/code/archsetup/docs/prototypes/panel-widget-gallery.html';
const shotIdx = process.argv.indexOf('--shot');
const shotPath = shotIdx > -1 ? process.argv[shotIdx + 1] : null;

const chrome = spawn('google-chrome-stable', [
  '--headless=new', `--remote-debugging-port=${PORT}`,
  '--no-first-run', '--no-default-browser-check',
  '--window-size=1600,1200', URL,
], { stdio: 'ignore' });

const sleep = ms => new Promise(r => setTimeout(r, ms));
let ws, id = 0;
const pending = new Map();
const events = [];

async function connect() {
  for (let i = 0; i < 40; i++) {
    try {
      const list = await (await fetch(`http://127.0.0.1:${PORT}/json`)).json();
      const page = list.find(t => t.type === 'page' && t.url.startsWith('file'));
      if (page) { ws = new WebSocket(page.webSocketDebuggerUrl); break; }
    } catch { /* retry */ }
    await sleep(250);
  }
  if (!ws) throw new Error('no page target');
  await new Promise(r => ws.onopen = r);
  ws.onmessage = m => {
    const d = JSON.parse(m.data);
    if (d.id && pending.has(d.id)) { pending.get(d.id)(d); pending.delete(d.id); }
    else if (d.method) events.push(d);
  };
}
function send(method, params = {}) {
  return new Promise(res => { const i = ++id; pending.set(i, res); ws.send(JSON.stringify({ id: i, method, params })); });
}
async function evl(expr) {
  const r = await send('Runtime.evaluate', { expression: expr, returnByValue: true });
  if (r.result.exceptionDetails) throw new Error('eval failed: ' + JSON.stringify(r.result.exceptionDetails.exception?.description || r.result.exceptionDetails.text));
  return r.result.result.value;
}
async function drag(x1, y1, x2, y2) {
  await send('Input.dispatchMouseEvent', { type: 'mousePressed', x: x1, y: y1, button: 'left', clickCount: 1 });
  const steps = 8;
  for (let i = 1; i <= steps; i++)
    await send('Input.dispatchMouseEvent', { type: 'mouseMoved', x: x1 + (x2 - x1) * i / steps, y: y1 + (y2 - y1) * i / steps, button: 'left' });
  await send('Input.dispatchMouseEvent', { type: 'mouseReleased', x: x2, y: y2, button: 'left', clickCount: 1 });
}

const fails = [];
const ok = (name, cond, detail = '') => { console.log(`${cond ? 'PASS' : 'FAIL'} ${name}${detail ? ' — ' + detail : ''}`); if (!cond) fails.push(name); };

try {
  await connect();
  await send('Runtime.enable');
  await send('Page.enable');
  await sleep(1500);

  // 0. console errors / exceptions
  const errs = events.filter(e => e.method === 'Runtime.exceptionThrown');
  ok('no exceptions on load', errs.length === 0, errs.map(e => e.params.exceptionDetails?.exception?.description).join('; ').slice(0, 200));

  // 1. defaults: size=2 (M), card count
  ok('default size 2', await evl(`document.body.dataset.size`) === '2');
  const cards = await evl(`document.querySelectorAll('.card').length`);
  ok('109 cards', cards === 109, `got ${cards}`);

  // 2. zoom actually scales: card visual width at 3x vs 1x
  await evl(`document.querySelector('.szbar .key[data-sz="3"]').click()`);
  const w3 = await evl(`document.querySelector('.card').getBoundingClientRect().width`);
  await evl(`document.querySelector('.szbar .key[data-sz="1"]').click()`);
  const w1 = await evl(`document.querySelector('.card').getBoundingClientRect().width`);
  ok('3x wider than 1x', w3 > w1 * 1.8, `w3=${Math.round(w3)} w1=${Math.round(w1)}`);
  ok('size chip flips state', await evl(`document.body.dataset.size`) === '1');

  // 3. behavioral at 3x: fader drag on card 03 (horizontal fader) changes readout
  await evl(`document.querySelector('.szbar .key[data-sz="3"]').click()`);
  await evl(`document.querySelectorAll('.card')[2].scrollIntoView({block:'center'}); ''`);
  await sleep(200);
  const fr = await evl(`(()=>{const c=document.querySelectorAll('.card')[2];const f=c.querySelector('.fader');const r=f.getBoundingClientRect();return [r.left,r.top,r.width,r.height];})()`);
  const before = await evl(`document.getElementById('rd-03').textContent`);
  await drag(fr[0] + fr[2] * 0.2, fr[1] + fr[3] / 2, fr[0] + fr[2] * 0.9, fr[1] + fr[3] / 2);
  await sleep(150);
  const after = await evl(`document.getElementById('rd-03').textContent`);
  ok('fader drag tracks at 3x', before !== after && after !== '—', `'${before}' -> '${after}'`);

  // 4. behavioral at 3x: toggle click on card 01
  await evl(`document.querySelectorAll('.card')[0].scrollIntoView({block:'center'}); ''`);
  await sleep(200);
  const sw = await evl(`(()=>{const c=document.querySelectorAll('.card')[0];const s=c.querySelector('.switch')||c.querySelector('.stagew > *');const r=s.getBoundingClientRect();return [r.left+r.width/2,r.top+r.height/2];})()`);
  const t0 = await evl(`document.getElementById('rd-01').textContent`);
  await send('Input.dispatchMouseEvent', { type: 'mousePressed', x: sw[0], y: sw[1], button: 'left', clickCount: 1 });
  await send('Input.dispatchMouseEvent', { type: 'mouseReleased', x: sw[0], y: sw[1], button: 'left', clickCount: 1 });
  await sleep(150);
  const t1 = await evl(`document.getElementById('rd-01').textContent`);
  ok('toggle click responds at 3x', t0 !== t1, `'${t0}' -> '${t1}'`);

  // 5. card 02 console keys: reading order and per-key tone. LIVE is green
  //    because --pass is what the kit means by live everywhere else; gold stays
  //    the generic engaged look. Craig's call, 2026-07-16.
  const order = await evl(`[...document.querySelectorAll('#card-02 .key')].map(b => b.textContent)`);
  ok('card 02 keys read SCAN, LIVE, MUTED',
    JSON.stringify(order) === JSON.stringify(['SCAN', 'LIVE', 'MUTED']), JSON.stringify(order));

  const engaged = await evl(`(()=>{
    const lit = [...document.querySelectorAll('#card-02 .key')].filter(b => /\\b(on|green|red)\\b/.test(b.className));
    return lit.length === 1 ? lit[0].textContent + ':' + lit[0].className.replace('key ','') : 'lit=' + lit.length;
  })()`);
  ok('card 02 engages LIVE in green by default', engaged === 'LIVE:green', engaged);

  const muted = await evl(`(()=>{
    const keys = [...document.querySelectorAll('#card-02 .key')];
    keys.find(b => b.textContent === 'MUTED').click();
    const lit = keys.filter(b => /\\b(on|green|red)\\b/.test(b.className));
    return lit.length === 1 ? lit[0].textContent + ':' + lit[0].className.replace('key ','') : 'lit=' + lit.length;
  })()`);
  ok('card 02 MUTED engages red and releases LIVE', muted === 'MUTED:red', muted);

  const rd02 = await evl(`document.getElementById('rd-02').textContent`);
  ok('card 02 readout tracks the engaged key', rd02 === 'MUTED', rd02);

  // 6. card 01 slide toggle: the new tone atoms exist. red/warn on the `on` axis
  //    let the ENGAGED state be the notable one (mute, record, airplane) — before
  //    these, red was only reachable via the `off` axis, which colours the
  //    disengaged state instead. dim offText lets an off toggle recede in a dense
  //    panel. Craig's call, 2026-07-16.
  const atoms = await evl(`(()=>{
    const S = GW.slideToggle.STYLES;
    const want = { on: ['amber','green','dark','red','warn'], onText: ['panel','cream','green'],
                   off: ['dark','red'], offText: ['white','red','black','dim'],
                   thumb: ['light','dark','chrome','brass'] };
    const missing = [];
    for (const [axis, names] of Object.entries(want))
      for (const n of names) if (!S[axis] || !S[axis][n]) missing.push(axis + '.' + n);
    return missing.length ? 'missing: ' + missing.join(', ') : 'ok';
  })()`);
  ok('slide toggle style atoms present', atoms === 'ok', atoms);

  // 7. presets name intent (a combination), not paint. Every axis a preset names
  //    must resolve in STYLES — a typo here would silently fall through to the
  //    stylesheet default and look "nearly right", which is the worst outcome.
  const presets = await evl(`(()=>{
    const P = GW.slideToggle.PRESETS, S = GW.slideToggle.STYLES;
    if (!P) return 'no PRESETS';
    const AX = GW.slideToggle.AXIS_ORDER;
    const bad = [];
    for (const [name, p] of Object.entries(P)) {
      for (const ax of AX) {
        if (!p[ax]) bad.push(name + ' missing ' + ax);
        else if (!S[ax][p[ax]]) bad.push(name + '.' + ax + '="' + p[ax] + '" not in STYLES');
      }
    }
    return bad.length ? bad.join('; ') : Object.keys(P).join(',');
  })()`);
  ok('every preset names a resolvable style on every axis',
    presets === 'panel,run,armed,caution,dark', presets);

  // 7a. the dark preset: neither state lights the pill, so the legend colour is
  //     the only thing carrying state. Both backgrounds must stay dark while the
  //     inks diverge — if either pill lights, the preset has lost its point.
  const dark = await evl(`(()=>{
    const P = GW.slideToggle.PRESETS.dark, S = GW.slideToggle.STYLES;
    const onBg = S.on[P.on].vars['--sw-on-bg'], offBg = S.off[P.off].vars['--sw-off-bg'];
    const onInk = S.onText[P.onText].vars['--sw-on-ink'], offInk = S.offText[P.offText].vars['--sw-off-ink'];
    if (onBg !== offBg) return 'pills differ: on=' + onBg + ' off=' + offBg;
    if (onInk === offInk) return 'inks identical, state unreadable: ' + onInk;
    return 'ok';
  })()`);
  ok('dark preset keeps both pills dark and the inks distinct', dark === 'ok', dark);

  // 7b. the card claims the preset it is actually in. The widget defaults to
  //     `panel`, so a preset group with nothing lit would assert "no preset
  //     active" — false, and exactly the kind of quiet mislabel this walk exists
  //     to catch. Nothing above this point touches card 01's chips (checks 2-4
  //     only toggle its switch, which does not restyle), so the default still
  //     stands here — but this must stay ABOVE checks 8/8b/9, which do mutate
  //     the chips. Insert preset-touching checks after them, not before.
  const defaultPreset = await evl(`(()=>{
    const pg = [...document.querySelectorAll('#card-01 .fgroup')]
      .find(g => g.querySelector('.lab')?.textContent === 'preset');
    if (!pg) return 'no preset group';
    const lit = [...pg.querySelectorAll('.fc')].filter(c => c.classList.contains('on'));
    return lit.length === 1 ? lit[0].title : 'lit=' + lit.length;
  })()`);
  ok('card 01 defaults to the panel preset', defaultPreset === 'panel', defaultPreset);

  // 8. a preset chip drives the widget AND re-syncs the axis chips, so the card
  //    never shows a combination the widget isn't in.
  const applied = await evl(`(()=>{
    const card = document.getElementById('card-01');
    const groups = [...card.querySelectorAll('.fgroup')];
    const pg = groups.find(g => g.querySelector('.lab')?.textContent === 'preset');
    if (!pg) return 'no preset group';
    const armed = [...pg.querySelectorAll('.fc')].find(c => c.title === 'armed');
    if (!armed) return 'no armed chip';
    armed.click();
    const onGroup = groups.find(g => g.querySelector('.lab')?.textContent === 'on');
    const lit = [...onGroup.querySelectorAll('.fc')].filter(c => c.classList.contains('on'));
    const brd = card.querySelector('.switch').style.getPropertyValue('--sw-on-brd');
    return (lit.length === 1 ? lit[0].title : 'lit=' + lit.length) + '|' + brd;
  })()`);
  ok('armed preset drives widget and syncs the on chip', applied === 'red|var(--fail)', applied);

  // 8b. axes are not independent: onText overrides the ink `on` sets, so changing
  //     `on` after picking an onText must not silently revert the legend while its
  //     chip still shows lit. Drive it in the hazardous order and check the ink.
  const orderSafe = await evl(`(()=>{
    const card = document.getElementById('card-01');
    const groups = [...card.querySelectorAll('.fgroup')];
    const grp = l => groups.find(g => g.querySelector('.lab')?.textContent === l);
    const chip = (l, t) => [...grp(l).querySelectorAll('.fc')].find(c => c.title === t);
    chip('on text', 'green').click();   // legend green
    chip('on', 'dark').click();         // then change the pill — must keep it
    const ink = card.querySelector('.switch').style.getPropertyValue('--sw-on-ink');
    const lit = [...grp('on text').querySelectorAll('.fc')].filter(c => c.classList.contains('on'));
    return ink + '|' + (lit.length === 1 ? lit[0].title : 'lit=' + lit.length);
  })()`);
  ok('changing on keeps the chosen onText (chips cannot lie)',
    orderSafe === 'var(--sevgrn)|green', orderSafe);

  // 9. diverging on one axis clears the preset — the card stops claiming a preset
  //    it is no longer in. Re-establishes its own precondition (preset lit) rather
  //    than inheriting it: the checks above already clicked axis chips, each of
  //    which clears the preset, so asserting lit===0 without re-lighting first
  //    would pass against an already-cleared group and prove nothing — including
  //    against a regression where clearing fired for onText but not for `on`.
  const diverged = await evl(`(()=>{
    const groups = [...document.querySelectorAll('#card-01 .fgroup')];
    const grp = l => groups.find(g => g.querySelector('.lab')?.textContent === l);
    const litPresets = () => [...grp('preset').querySelectorAll('.fc')].filter(c => c.classList.contains('on')).length;
    [...grp('preset').querySelectorAll('.fc')].find(c => c.title === 'run').click();
    const before = litPresets();
    [...grp('on').querySelectorAll('.fc')].find(c => c.title === 'green').click();
    return before + '->' + litPresets();
  })()`);
  ok('changing an axis clears the preset selection', diverged === '1->0', diverged);

  // late exceptions from interactions
  const errs2 = events.filter(e => e.method === 'Runtime.exceptionThrown');
  ok('no exceptions after interaction', errs2.length === 0);

  if (shotPath) {
    await evl(`window.scrollTo(0,0)`);
    await sleep(300);
    const shot = await send('Page.captureScreenshot', { format: 'png' });
    writeFileSync(shotPath, Buffer.from(shot.result.data, 'base64'));
    console.log('shot: ' + shotPath);
  }
} catch (e) {
  console.error('PROBE ERROR: ' + e.message);
  fails.push('probe-error');
} finally {
  chrome.kill();
}
process.exit(fails.length ? 1 : 0);