// Rig Pocket: one page, two views (#/ overview, #/seat/<name> screen + reply). Plain DOM, no build.
const $ = (tag, attrs = {}, ...kids) => {
  const el = document.createElement(tag);
  for (const [k, v] of Object.entries(attrs)) {
    if (k === 'class') el.className = v;
    else if (k.startsWith('on')) el.addEventListener(k.slice(2), v);
    else el.setAttribute(k, v);
  }
  for (const kid of kids.flat()) if (kid != null) el.append(kid.nodeType ? kid : String(kid));
  return el;
};

const ago = (iso) => {
  if (!iso) return '';
  const s = Math.max(0, (Date.now() - new Date(typeof iso === 'number' ? iso * 1000 : iso)) / 1000);
  if (s < 60) return `${Math.round(s)} s`;
  if (s < 3600) return `${Math.round(s / 60)} min`;
  if (s < 86400) return `${Math.round(s / 3600)} t`;
  return `${Math.round(s / 86400)} d`;
};

const seatTag = (s) => {
  if (s.stalled) return $('span', { class: 'wt-tag wt-tag--bad' }, `hænger (${s.stalled} min)`);
  if (s.waiting) return $('span', { class: 'wt-tag wt-tag--warn' }, 'venter på svar');
  if (s.status && s.status !== 'running') return $('span', { class: 'wt-tag wt-tag--bad' }, s.status);
  if (s.activity === 'running' || s.activity === 'working') return $('span', { class: 'wt-tag wt-tag--accent' }, 'arbejder');
  return $('span', { class: 'wt-tag' }, 'ledig');
};

const gb = (bytes) => (bytes / 2 ** 30).toFixed(1);

const QSTATE ={ 'in-progress': 'wt-tag--accent', blocked: '', parked: '', done: 'wt-tag--good', failed: 'wt-tag--bad' };

let snap = null;
let timer = null;

async function load() {
  try {
    const r = await fetch('api/status', { cache: 'no-store' });
    snap = await r.json();
    render();
  } catch (e) {
    document.getElementById('updated').textContent = 'offline';
  }
}

async function post(path, payload) {
  const r = await fetch(path, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json', 'X-Rig-Pocket': '1' },
    body: JSON.stringify(payload),
  });
  return r.ok;
}

// A reply box: textarea + button. onSend gets the text and returns a promise of success.
function replyBox(placeholder, label, onSend) {
  const input = $('textarea', { class: 'wt-input', rows: '2', placeholder });
  const status = $('span', { class: 'wt-muted' });
  const go = async () => {
    const text = input.value.trim();
    if (!text) return;
    status.textContent = 'Sender…';
    if (await onSend(text)) { input.value = ''; status.textContent = 'Sendt'; setTimeout(load, 1500); } else status.textContent = 'Fejl';
  };
  return $('div', { class: 'wt-stack' }, input,
    $('div', { class: 'wt-row wt-row--between' }, status, $('button', { class: 'wt-btn wt-btn--primary', onclick: go }, label)));
}

// What a seat is asking, with the controls to answer it.
function askBlock(s, after) {
  const a = s.ask;
  const done = (ok) => { if (after) after(); setTimeout(load, 1500); return ok; };
  if (!a && s.stalled) {
    return $('div', { class: 'wt-stack' },
      $('span', { class: 'wt-muted' }, `Samme tur i ${s.stalled} min uden at producere noget. Esc afbryder, bagefter kan du bede den fortsætte.`),
      $('button', { class: 'wt-btn', onclick: async () => done(await post('api/send', { seat: s.name, key: 'esc' })) }, 'Esc (afbryd turen)'));
  }
  if (!a) return null;
  if (a.kind === 'menu') {
    return $('div', { class: 'wt-stack' },
      a.title ? $('span', {}, a.title) : null,
      $('div', { class: 'wt-stack' },
        a.options.map((o) => $('button', { class: `wt-btn ${o.key === '1' ? 'wt-btn--primary' : ''}`,
          onclick: async (e) => { e.target.disabled = true; done(await post('api/send', { seat: s.name, key: o.key })); } },
        `${o.key}. ${o.label}`)),
        $('button', { class: 'wt-btn', onclick: async () => done(await post('api/send', { seat: s.name, key: 'esc' })) }, 'Esc (annullér)')));
  }
  return $('div', { class: 'wt-stack' },
    $('blockquote', { class: 'wt-muted' }, a.text),
    replyBox('Dit svar…', 'Svar', async (text) => done(await post('api/send', { seat: s.name, text }))));
}

function overview() {
  const view = [];
  const mem = snap.memory;
  if (mem && mem.fraction >= 0.9) {
    view.push($('section', { class: 'wt-card wt-card--raised wt-stack' },
      $('div', { class: 'wt-row wt-row--between' }, $('h2', { class: 'wt-card-title' }, 'Hukommelse'),
        $('span', { class: 'wt-tag wt-tag--bad' }, `${Math.round(mem.fraction * 100)} %`)),
      $('span', {}, `${gb(mem.used)} af ${gb(mem.limit)} GB brugt. Agenterne kan gå i stå; giv containeren mere RAM eller stop et team.`)));
  }
  const waiting = snap.rigs.flatMap((r) => r.seats.filter((s) => s.waiting || s.stalled));
  const gates = snap.queue.filter((q) => q.gate);
  if (waiting.length || gates.length) {
    view.push($('section', { class: 'wt-card wt-card--raised wt-stack' },
      $('h2', { class: 'wt-card-title' }, 'Venter på dig'),
      gates.map((q) => $('div', { class: 'wt-stack' },
        $('div', { class: 'wt-row wt-row--between' }, $('span', { class: 'wt-tag wt-tag--warn' }, 'beslutning'),
          $('span', { class: 'wt-muted' }, `${q.source} · ${ago(q.updated)}`)),
        $('span', {}, q.summary || q.id),
        replyBox('Din beslutning…', 'Send beslutning', (text) => post('api/resolve', { id: q.id, text })))),
      waiting.map((s) => $('div', { class: 'wt-stack' },
        $('a', { class: 'wt-row wt-row--between', href: `#/seat/${s.name}` }, $('strong', {}, s.name), seatTag(s)),
        askBlock(s)))));
  }

  for (const r of snap.rigs) {
    view.push($('section', { class: 'wt-card wt-stack' },
      $('div', { class: 'wt-row wt-row--between' },
        $('h2', { class: 'wt-card-title' }, r.name),
        $('span', { class: 'wt-muted' }, `${r.status} · ${r.uptime}`)),
      r.seats.map((s) => $('a', { class: 'wt-row wt-row--between', href: `#/seat/${s.name}` },
        $('span', {}, s.name.split('@')[0]),
        $('span', { class: 'wt-row' },
          s.work ? $('span', { class: 'wt-muted' }, `${s.work} opg.`) : null,
          $('span', { class: 'wt-muted' }, ago(s.lastActivity)),
          seatTag(s))))));
  }

  const open = snap.queue.filter((q) => !['done', 'closed', 'canceled'].includes(q.state) && q.summary);
  const done = snap.queue.filter((q) => q.state === 'done' && q.summary).slice(0, 6);
  if (open.length || done.length) {
    view.push($('section', { class: 'wt-card wt-stack' },
      $('h2', { class: 'wt-card-title' }, 'Opgaver'),
      [...open, ...done].map((q) => $('div', { class: 'wt-stack' },
        $('div', { class: 'wt-row wt-row--between' },
          $('span', { class: `wt-tag ${QSTATE[q.state] || ''}` }, q.state),
          $('span', { class: 'wt-muted' }, `${q.dest} · ${ago(q.updated)}`)),
        $('span', {}, q.summary)))));
  }

  for (const repo of snap.repos) {
    if (!repo.commits.length) continue;
    view.push($('section', { class: 'wt-card wt-stack' },
      $('h2', { class: 'wt-card-title' }, repo.name),
      repo.commits.slice(0, 8).map((c) => $('div', {},
        $('div', { class: 'wt-row wt-row--between' },
          $('code', {}, c.short), $('span', { class: 'wt-muted' }, ago(c.when))),
        $('span', {}, c.subject)))));
  }
  return view;
}

function seatView(name) {
  const s = snap.rigs.flatMap((r) => r.seats).find((x) => x.name === name);
  const pre = $('pre', { class: 'wt-pre' }, 'Henter skærm…');
  const refresh = async () => {
    const r = await fetch(`api/capture/${encodeURIComponent(name)}`, { cache: 'no-store' });
    pre.textContent = r.ok ? (await r.json()).screen : 'Ukendt agent';
    pre.scrollTop = pre.scrollHeight;
  };
  refresh();
  clearInterval(timer);
  timer = setInterval(refresh, 5000);

  return [
    $('a', { href: '#/', class: 'wt-muted' }, '← Oversigt'),
    $('div', { class: 'wt-row wt-row--between' }, $('h2', {}, name), s ? seatTag(s) : null),
    s && s.ask && s.ask.kind === 'menu' ? $('section', { class: 'wt-card wt-card--raised' }, askBlock(s, () => setTimeout(refresh, 1200))) : null,
    pre,
    replyBox(`Skriv til ${name}…`, 'Send', async (text) => { const ok = await post('api/send', { seat: name, text }); setTimeout(refresh, 1200); return ok; }),
  ];
}

function render() {
  if (!snap) return;
  document.getElementById('updated').textContent = ago(snap.updated) + (snap.memory ? ` · ${gb(snap.memory.used)}/${gb(snap.memory.limit)} GB` : '');
  const m = location.hash.match(/^#\/seat\/(.+)$/);
  const view = document.getElementById('view');
  // keep the open seat view, and never wipe an answer being typed
  if (m && view.dataset.seat === m[1]) return;
  const typing = [...view.querySelectorAll('textarea')].some((t) => t.value || t === document.activeElement);
  if (!m && !view.dataset.seat && typing) return;
  view.dataset.seat = m ? m[1] : '';
  if (!m) clearInterval(timer);
  view.replaceChildren(...(m ? seatView(decodeURIComponent(m[1])) : overview()).filter(Boolean));
}

window.addEventListener('hashchange', render);
document.addEventListener('visibilitychange', () => { if (!document.hidden) load(); });
load();
setInterval(load, 15000);