/* Редактор теста: рабочий минимум.
 * Работает с эндпоинтами /api/tests/<id>/{draft, ai/generate-test, ai/generate-question}
 * и /api/tests/<id> (PATCH chainActive).
 *
 * Полная мобильная отполировка UX (4 аккордеона, fixed footer, drag-n-drop)
 * запланирована отдельным спринтом E1.7.
 */
(() => {
  'use strict';

  const root = document.getElementById('editor-root');
  if (!root) return;

  const TEST_ID = root.dataset.testId;
  const initial = JSON.parse(root.dataset.initial);

  const $ = (sel, parent = document) => parent.querySelector(sel);
  const $$ = (sel, parent = document) => Array.from(parent.querySelectorAll(sel));

  const titleEl = $('#test-title');
  const descEl = $('#test-description');
  const thresholdEl = $('#test-threshold');
  const questionsEl = $('#questions');
  const qCountEl = $('#q-count');
  const saveStatusEl = $('#save-status');
  const aiStatusEl = $('#ai-status');
  const chainActiveEl = $('#chain-active');
  const aiTopicEl = $('#ai-topic');
  const aiQCountEl = $('#ai-q-count');
  const aiOCountEl = $('#ai-o-count');
  const introUpdatedEl = $('#intro-updated');
  const introForkBannerEl = $('#intro-fork-banner');
  const versionsListEl = $('#versions-list');
  const attemptsListEl = $('#attempts-list');
  const visibilityBtn = $('#btn-toggle-visibility');
  const assignSearchEl = $('#assign-search');
  const assignDeptEl = $('#assign-dept');
  const assignClinicEl = $('#assign-clinic');
  const assignListEl = $('#assign-list');
  const assignSelectAllBtn = $('#assign-select-all');
  const assignSubmitBtn = $('#assign-submit');
  const assignStatusEl = $('#assign-status');

  const tplQ = $('#tpl-question');
  const tplO = $('#tpl-option');

  let chainActive = true;
  let assignPeople = [];
  let assignSelected = new Set();
  let hasAnyAttempts = false;
  let hasForkRisk = Boolean(initial?.test?.hasForkRisk)
    || (introForkBannerEl && introForkBannerEl.dataset.forkRisk === '1');
  let baselineDraftKey = '';
  let dirtyCheckQueued = false;

  function currentDraftKey() {
    return JSON.stringify(collectPayload());
  }

  function isDirty() {
    return baselineDraftKey !== '' && baselineDraftKey !== currentDraftKey();
  }

  function updateForkBanner() {
    if (!introForkBannerEl) return;
    introForkBannerEl.style.display = (hasForkRisk && isDirty()) ? '' : 'none';
  }

  function scheduleDirtyCheck() {
    if (dirtyCheckQueued) return;
    dirtyCheckQueued = true;
    requestAnimationFrame(() => {
      dirtyCheckQueued = false;
      updateForkBanner();
    });
  }

  function resetBaselineDraft() {
    baselineDraftKey = currentDraftKey();
    updateForkBanner();
  }

  // ─── render ─────────────────────────────────────────────────────────

  function syncOptionInputTypes(qNode) {
    const isMulti = $('.q-multi', qNode).checked;
    const qName = `q-correct-${Math.random().toString(36).slice(2)}`;
    $$('.opt-correct', qNode).forEach((input) => {
      input.type = isMulti ? 'checkbox' : 'radio';
      if (isMulti) input.removeAttribute('name');
      else input.setAttribute('name', qName);
      input.classList.add('question-option-row__mark');
    });
  }

  function renderQuestion(q) {
    const node = tplQ.content.firstElementChild.cloneNode(true);
    node._q = { id: q.id || null };
    $('.q-text', node).value = q.text || '';
    $('.q-multi', node).checked = !!q.hasMultipleAnswers;

    const optsEl = $('.q-options', node);
    (q.options || []).forEach((o) => optsEl.appendChild(renderOption(o)));

    bindQuestionEvents(node);
    syncOptionInputTypes(node);
    return node;
  }

  function renderOption(o) {
    const node = tplO.content.firstElementChild.cloneNode(true);
    $('.opt-text', node).value = o.text || '';
    $('.opt-correct', node).checked = !!o.isCorrect;
    $('.opt-delete', node).addEventListener('click', () => {
      node.remove();
    });
    return node;
  }

  function bindQuestionEvents(node) {
    $('.q-delete', node).addEventListener('click', () => {
      if (!confirm('Удалить вопрос?')) return;
      node.remove();
      renumber();
      scheduleDirtyCheck();
    });
    $('.q-up', node).addEventListener('click', () => {
      if (node.previousElementSibling) {
        node.parentNode.insertBefore(node, node.previousElementSibling);
        renumber();
        scheduleDirtyCheck();
      }
    });
    $('.q-down', node).addEventListener('click', () => {
      if (node.nextElementSibling) {
        node.parentNode.insertBefore(node.nextElementSibling, node);
        renumber();
        scheduleDirtyCheck();
      }
    });
    $('.q-add-option', node).addEventListener('click', () => {
      $('.q-options', node).appendChild(renderOption({ text: '', isCorrect: false }));
      syncOptionInputTypes(node);
      scheduleDirtyCheck();
    });
    $('.q-ai', node).addEventListener('click', () => aiGenerateQuestion(node));
    $('.q-multi', node).addEventListener('change', () => {
      syncOptionInputTypes(node);
      scheduleDirtyCheck();
    });
  }

  function renumber() {
    $$('#questions .q-item').forEach((li, i) => {
      $('.q-num', li).textContent = `Вопрос #${i + 1}`;
    });
    const n = $$('#questions .q-item').length;
    if (qCountEl) qCountEl.textContent = n;
    const mirror = document.getElementById('q-count-mirror');
    if (mirror) mirror.textContent = n;
  }

  function autoResize(el) {
    if (!el) return;
    el.style.height = 'auto';
    el.style.height = el.scrollHeight + 'px';
  }

  function loadInitial() {
    titleEl.value = initial.test.title || '';
    descEl.value = initial.test.description || '';
    autoResize(titleEl);
    autoResize(descEl);
    if (titleEl && titleEl.tagName === 'TEXTAREA') {
      titleEl.addEventListener('input', () => autoResize(titleEl));
      titleEl.addEventListener('keydown', (e) => {
        if (e.key === 'Enter') e.preventDefault();
      });
    }
    if (descEl) descEl.addEventListener('input', () => autoResize(descEl));
    thresholdEl.value =
      initial.test.passingThreshold == null ? '' : Number(initial.test.passingThreshold);

    questionsEl.innerHTML = '';
    (initial.questions || []).forEach((q) => questionsEl.appendChild(renderQuestion(q)));
    renumber();
    if (aiTopicEl && !aiTopicEl.value.trim()) {
      aiTopicEl.value = initial.test.title || '';
    }
  }

  function fmtDt(iso) {
    if (!iso) return '—';
    try {
      return new Date(iso).toLocaleString('ru-RU', { dateStyle: 'short', timeStyle: 'short' });
    } catch {
      return '—';
    }
  }

  function escHtml(s) {
    return String(s == null ? '' : s)
      .replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;').replace(/'/g, '&#39;');
  }

  // ─── collect ───────────────────────────────────────────────────────

  function collectPayload() {
    const questions = $$('#questions .q-item').map((li, i) => ({
      text: $('.q-text', li).value.trim(),
      question_order: i + 1,
      hasMultipleAnswers: $('.q-multi', li).checked,
      options: $$('.opt-item', li).map((op, j) => ({
        text: $('.opt-text', op).value.trim(),
        isCorrect: $('.opt-correct', op).checked,
        option_order: j + 1,
      })),
    }));
    const payload = {
      title: titleEl.value.trim() || null,
      description: descEl.value.trim() || null,
      questions,
    };
    const t = thresholdEl.value;
    if (t !== '' && Number.isFinite(Number(t))) payload.passingThreshold = Number(t);
    return payload;
  }

  function collectShape() {
    return $$('#questions .q-item').map((li) => ({
      optionsCount: Math.max(2, $$('.opt-item', li).length || 4),
      hasMultipleAnswers: $('.q-multi', li).checked,
    }));
  }

  // ─── actions ───────────────────────────────────────────────────────

  $('#add-question').addEventListener('click', () => {
    questionsEl.appendChild(
      renderQuestion({
        text: '',
        hasMultipleAnswers: false,
        options: [
          { text: '', isCorrect: true },
          { text: '', isCorrect: false },
          { text: '', isCorrect: false },
          { text: '', isCorrect: false },
        ],
      }),
    );
    renumber();
    scheduleDirtyCheck();
  });

  $('#save-draft').addEventListener('click', async () => {
    saveStatusEl.textContent = 'Сохраняем…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/draft`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(collectPayload()),
      });
      const data = await r.json();
      if (!r.ok) throw new Error(data.error || 'Не удалось сохранить.');
      if (chainActiveEl.checked !== chainActive) {
        const r2 = await fetch(`/api/tests/${TEST_ID}`, {
          method: 'PATCH',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ chainActive: chainActiveEl.checked }),
        });
        if (r2.ok) chainActive = chainActiveEl.checked;
      }
      saveStatusEl.textContent = data.forked
        ? 'Сохранено (создана новая версия — есть попытки прохождения).'
        : 'Сохранено.';
      resetBaselineDraft();
      setTimeout(() => (saveStatusEl.textContent = ''), 4000);
    } catch (e) {
      saveStatusEl.textContent = '';
      alert(e.message || 'Не удалось сохранить.');
    }
  });

  $('#ai-generate-test').addEventListener('click', async () => {
    const topic = (aiTopicEl?.value || titleEl.value || '').trim();
    if (!topic) {
      alert('Укажите тему.');
      return;
    }
    const nQ = Math.min(30, Math.max(1, Number(aiQCountEl?.value || 7) || 7));
    const nO = Math.min(8, Math.max(2, Number(aiOCountEl?.value || 3) || 3));
    const shape = Array.from({ length: nQ }, () => ({
      optionsCount: nO,
      hasMultipleAnswers: false,
    }));
    aiStatusEl.textContent = 'Генерируем…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/ai/generate-test`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          testTitle: topic,
          testDescription: descEl.value,
          shape,
        }),
      });
      const data = await r.json();
      if (!r.ok) throw new Error(data.error || 'AI: ошибка.');
      const draft = data.draft;
      if (draft.title) {
        titleEl.value = draft.title;
        if (aiTopicEl) aiTopicEl.value = draft.title;
      }
      if (draft.description) descEl.value = draft.description;
      questionsEl.innerHTML = '';
      (draft.questions || []).forEach((q) => questionsEl.appendChild(renderQuestion(q)));
      renumber();
      scheduleDirtyCheck();
      aiStatusEl.textContent = `Готово: ${draft.questions?.length || 0} вопросов.`;
      setTimeout(() => (aiStatusEl.textContent = ''), 4000);
    } catch (e) {
      aiStatusEl.textContent = '';
      alert(e.message || 'AI: ошибка.');
    }
  });

  // ─── импорт документа (E1.3) ───────────────────────────────────

  $('#ai-import-file').addEventListener('change', async (ev) => {
    const file = ev.target.files && ev.target.files[0];
    ev.target.value = '';
    if (!file) return;
    aiStatusEl.textContent = `Загружаем «${file.name}»…`;
    try {
      const fd = new FormData();
      fd.append('file', file);
      const r = await fetch('/api/tests/import/document', { method: 'POST', body: fd });
      const data = await r.json();
      if (!r.ok) throw new Error(data.error || 'Не удалось импортировать.');
      const g = data.generation || {};
      if (!g.available) {
        aiStatusEl.textContent = '';
        const msg = g.message || 'AI недоступен.';
        const preview = (g.textPreview || data.extractedText || '').slice(0, 600);
        alert(msg + (preview ? '\n\nПервые 600 символов:\n' + preview : ''));
        return;
      }
      const ok = confirm(
        `${g.message}\n\nПрименить как новый черновик?\n` +
        `Текущие вопросы будут заменены.`,
      );
      if (!ok) {
        aiStatusEl.textContent = '';
        return;
      }
      const draft = g.draft;
      if (draft.title) titleEl.value = draft.title;
      if (draft.description) descEl.value = draft.description;
      questionsEl.innerHTML = '';
      (draft.questions || []).forEach((q) => questionsEl.appendChild(renderQuestion(q)));
      renumber();
      scheduleDirtyCheck();
      aiStatusEl.textContent = `Применено: ${draft.questions?.length || 0} вопросов.`;
      setTimeout(() => (aiStatusEl.textContent = ''), 4000);
    } catch (e) {
      aiStatusEl.textContent = '';
      alert(e.message || 'Не удалось импортировать.');
    }
  });

  // ─── AI v2 (E1.8): generate-by-title / check / improve ─────────

  function aiAlert(data, fallback) {
    const msg = (data && data.error) || fallback || 'AI: ошибка.';
    if (data && data.settingsUrl) {
      if (confirm(msg + '\n\nОткрыть Настройки?')) {
        window.location.href = data.settingsUrl;
      }
      return;
    }
    alert(msg);
  }

  const modal = $('#ai-modal');
  const modalTitle = $('#ai-modal-title');
  const modalBody = $('#ai-modal-body');
  const modalActions = $('#ai-modal-actions');
  $('#ai-modal-close').addEventListener('click', () => modal.close());

  function openModal(title, bodyHtml, actions) {
    modalTitle.textContent = title;
    modalBody.innerHTML = bodyHtml;
    modalActions.innerHTML = '';
    (actions || []).forEach((a) => {
      const b = document.createElement('button');
      b.textContent = a.label;
      b.className = a.className
        || 'px-3 py-2 rounded-lg bg-ink-100 hover:bg-ink-200 text-sm';
      b.addEventListener('click', () => a.onClick(b));
      modalActions.appendChild(b);
    });
    modal.showModal();
  }

  const aiGenerateByTitleBtn = $('#ai-generate-by-title');
  if (aiGenerateByTitleBtn) aiGenerateByTitleBtn.addEventListener('click', async () => {
    const title = titleEl.value.trim();
    if (!title) {
      alert('Сначала заполните название теста.');
      titleEl.focus();
      return;
    }
    const nQRaw = prompt('Сколько вопросов сгенерировать?', '10');
    if (nQRaw == null) return;
    const nQ = Math.max(3, Math.min(40, parseInt(nQRaw, 10) || 10));
    const nORaw = prompt('Сколько вариантов в каждом вопросе?', '4');
    if (nORaw == null) return;
    const nO = Math.max(2, Math.min(12, parseInt(nORaw, 10) || 4));
    aiStatusEl.textContent = 'Генерируем по названию…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/ai/generate-by-title`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          testTitle: title,
          testDescription: descEl.value,
          questionsCount: nQ,
          optionsCount: nO,
        }),
      });
      const data = await r.json();
      if (!r.ok) {
        aiStatusEl.textContent = '';
        return aiAlert(data);
      }
      const draft = data.draft;
      const ok = confirm(
        `Готово: «${draft.title}», вопросов — ${draft.questions.length}.\n` +
        'Применить как черновик? Текущие вопросы будут заменены.',
      );
      if (!ok) {
        aiStatusEl.textContent = '';
        return;
      }
      if (draft.title) titleEl.value = draft.title;
      if (draft.description) descEl.value = draft.description;
      questionsEl.innerHTML = '';
      (draft.questions || []).forEach((q) => questionsEl.appendChild(renderQuestion(q)));
      renumber();
      scheduleDirtyCheck();
      aiStatusEl.textContent = `Применено: ${draft.questions.length} вопросов.`;
      setTimeout(() => (aiStatusEl.textContent = ''), 4000);
    } catch (e) {
      aiStatusEl.textContent = '';
      aiAlert(null, e.message);
    }
  });

  const aiCheckBtn = $('#ai-check');
  if (aiCheckBtn) aiCheckBtn.addEventListener('click', async () => {
    const payload = collectPayload();
    if (!payload.questions.length) {
      alert('В тесте нет вопросов — нечего проверять.');
      return;
    }
    aiStatusEl.textContent = 'Анализируем…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/ai/check`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          testTitle: titleEl.value,
          testDescription: descEl.value,
          questions: payload.questions,
        }),
      });
      const data = await r.json();
      aiStatusEl.textContent = '';
      if (!r.ok) return aiAlert(data);
      const rev = data.review || {};
      const verdict = rev.verdict || 'warn';
      const verdictMap = {
        ok: ['Годен', 'bg-green-50 text-green-800 border-green-200'],
        warn: ['Есть замечания', 'bg-yellow-50 text-yellow-800 border-yellow-200'],
        bad: ['Серьёзные проблемы', 'bg-red-50 text-red-800 border-red-200'],
      };
      const [verdictText, verdictCls] = verdictMap[verdict] || verdictMap.warn;
      let html = `<div class="rounded-lg border ${verdictCls} p-3 text-sm">
        <div class="font-semibold">${verdictText}</div>
        <div class="mt-1">${escHtml(rev.summary || '')}</div></div>`;
      if (Array.isArray(rev.sections) && rev.sections.length) {
        html += rev.sections.map((s) => `
          <div class="mt-4">
            <div class="font-semibold">${escHtml(s.title)}</div>
            <ul class="mt-1 list-disc pl-5 text-sm space-y-1">
              ${s.items.map((it) => `<li>${escHtml(it)}</li>`).join('')}
            </ul>
          </div>`).join('');
      } else {
        html += '<p class="mt-4 text-sm text-ink-500">Замечаний нет.</p>';
      }
      openModal('Проверка теста', html, [
        { label: 'Закрыть', onClick: () => modal.close(),
          className: 'px-3 py-2 rounded-lg bg-brand-600 hover:bg-brand-700 text-white text-sm' },
      ]);
    } catch (e) {
      aiStatusEl.textContent = '';
      aiAlert(null, e.message);
    }
  });

  const aiImproveBtn = $('#ai-improve');
  if (aiImproveBtn) aiImproveBtn.addEventListener('click', async () => {
    const payload = collectPayload();
    if (!payload.questions.length) {
      alert('В тесте нет вопросов — нечего улучшать.');
      return;
    }
    aiStatusEl.textContent = 'Улучшаем…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/ai/improve`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          testTitle: titleEl.value,
          testDescription: descEl.value,
          questions: payload.questions,
        }),
      });
      const data = await r.json();
      aiStatusEl.textContent = '';
      if (!r.ok) return aiAlert(data);
      const items = data.items || [];
      if (!items.length) {
        openModal('Улучшение теста', '<p>Нечего улучшать.</p>', [
          { label: 'Закрыть', onClick: () => modal.close() },
        ]);
        return;
      }
      const changed = items.filter((i) => i.changed);
      if (!changed.length) {
        openModal('Улучшение теста', '<p>AI не предложил изменений.</p>', [
          { label: 'Закрыть', onClick: () => modal.close() },
        ]);
        return;
      }
      let html = `<p class="text-sm text-ink-500 mb-3">
        Отметьте вопросы, к которым нужно применить улучшения. ${changed.length} из ${items.length}.</p>`;
      html += changed.map((it) => `
        <div class="rounded-xl border border-ink-300/60 p-3 mb-3" data-idx="${it.index}">
          <label class="inline-flex items-center gap-2 text-sm font-medium">
            <input type="checkbox" class="apply-q rounded border-ink-300 text-brand-600 focus:ring-brand-500" checked />
            <span>Вопрос #${it.index + 1}</span>
          </label>
          <div class="mt-2 grid grid-cols-1 md:grid-cols-2 gap-3 text-sm">
            <div>
              <div class="text-xs uppercase text-ink-500">Было</div>
              <div class="mt-1 ${it.textChanged ? 'line-through text-ink-500' : ''}">
                ${escHtml(it.original.text)}
              </div>
              <ul class="mt-1 list-disc pl-5">
                ${it.original.options.map((o) =>
                  `<li class="${it.optionsChanged ? 'text-ink-500' : ''}">
                    ${o.isCorrect ? '✓ ' : ''}${escHtml(o.text)}</li>`).join('')}
              </ul>
            </div>
            <div>
              <div class="text-xs uppercase text-brand-700">Стало</div>
              <div class="mt-1 ${it.textChanged ? 'font-medium' : ''}">
                ${escHtml(it.suggested.text)}
              </div>
              <ul class="mt-1 list-disc pl-5">
                ${it.suggested.options.map((o) =>
                  `<li>${o.isCorrect ? '✓ ' : ''}${escHtml(o.text)}</li>`).join('')}
              </ul>
            </div>
          </div>
        </div>`).join('');
      openModal('Улучшение теста', html, [
        { label: 'Отмена', onClick: () => modal.close() },
        {
          label: 'Применить выбранное',
          className: 'px-3 py-2 rounded-lg bg-brand-600 hover:bg-brand-700 text-white text-sm',
          onClick: () => {
            const qs = $$('#questions .q-item');
            modalBody.querySelectorAll('[data-idx]').forEach((row) => {
              if (!$('.apply-q', row).checked) return;
              const idx = parseInt(row.dataset.idx, 10);
              const it = items.find((x) => x.index === idx);
              if (!it || !qs[idx]) return;
              const node = qs[idx];
              $('.q-text', node).value = it.suggested.text;
              $('.q-multi', node).checked = !!it.suggested.hasMultipleAnswers;
              const optsEl = $('.q-options', node);
              optsEl.innerHTML = '';
              it.suggested.options.forEach((o) => optsEl.appendChild(renderOption(o)));
            });
            modal.close();
            scheduleDirtyCheck();
            aiStatusEl.textContent = 'Изменения применены. Не забудьте сохранить.';
            setTimeout(() => (aiStatusEl.textContent = ''), 5000);
          },
        },
      ]);
    } catch (e) {
      aiStatusEl.textContent = '';
      aiAlert(null, e.message);
    }
  });

  async function aiGenerateQuestion(node) {
    const qText = $('.q-text', node).value.trim();
    const optsCount = Math.max(2, $$('.opt-item', node).length || 4);
    const multi = $('.q-multi', node).checked;
    aiStatusEl.textContent = 'AI: один вопрос…';
    try {
      const r = await fetch(`/api/tests/${TEST_ID}/ai/generate-question`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          testTitle: titleEl.value,
          testDescription: descEl.value,
          questionText: qText,
          optionsCount: optsCount,
          hasMultipleAnswers: multi,
        }),
      });
      const data = await r.json();
      if (!r.ok) throw new Error(data.error || 'AI: ошибка.');
      $('.q-text', node).value = data.text || '';
      if (data.mode === 'full' && Array.isArray(data.options)) {
        const optsEl = $('.q-options', node);
        optsEl.innerHTML = '';
        data.options.forEach((o) => optsEl.appendChild(renderOption(o)));
        $('.q-multi', node).checked = !!data.hasMultipleAnswers;
      }
      scheduleDirtyCheck();
      aiStatusEl.textContent = data.mode === 'full' ? 'AI: вопрос сгенерирован.' : 'AI: формулировка обновлена.';
      setTimeout(() => (aiStatusEl.textContent = ''), 4000);
    } catch (e) {
      aiStatusEl.textContent = '';
      alert(e.message || 'AI: ошибка.');
    }
  }

  // ─── chain active state (грузим summary, чтобы знать стартовое значение) ───

  fetch(`/api/tests/${TEST_ID}/summary`)
    .then((r) => r.json())
    .then((data) => {
      if (data && data.test && typeof data.test.chainActive === 'boolean') {
        chainActive = data.test.chainActive;
        chainActiveEl.checked = chainActive;
      } else {
        chainActiveEl.checked = true;
        chainActive = true;
      }
    })
    .catch(() => {
      chainActiveEl.checked = true;
    });

  function renderVersions(rows) {
    if (!versionsListEl) return;
    versionsListEl.innerHTML = '';
    (rows || []).forEach((r) => {
      const li = document.createElement('li');
      li.className = 'surface-card version-card-list__item';
      li.innerHTML = `
        <div class="version-card-list__row">
          <div class="version-card-list__main">
            <div class="version-card-list__title-line">
              <span class="font-headline" style="font-size:1rem;">v${r.version}</span>
              ${r.is_active ? '<span class="code-inline" style="font-size:0.7rem;">текущая</span>' : ''}
            </div>
            <p class="muted mono" style="margin:.4rem 0 0; font-size:.8rem;">${fmtDt(r.created_at)}</p>
            <p class="muted" style="margin:.2rem 0 0; font-size:.8rem;">Активна: ${r.is_active ? 'да' : 'нет'}</p>
          </div>
        </div>`;
      versionsListEl.appendChild(li);
    });
  }

  function renderAttempts(rows) {
    if (!attemptsListEl) return;
    attemptsListEl.innerHTML = '';
    (rows || []).forEach((a) => {
      const when = a.completedAt ? fmtDt(a.completedAt) : (a.startedAt ? fmtDt(a.startedAt) : '—');
      const result = a.status === 'completed' && a.totalQuestions != null
        ? `${a.correctCount}/${a.totalQuestions}${a.passed ? ' · зачёт' : ' · незачёт'}`
        : a.status;
      const li = document.createElement('li');
      li.className = 'surface-card attempts-card-list__item';
      li.innerHTML = `
        <div class="attempts-card-list__row">
          <div class="attempts-card-list__main">
            <p class="muted mono" style="margin:0; font-size:.8rem;">${when}</p>
            <p style="margin:.35rem 0 0; font-weight:600;">${escHtml(a.attempterName || '—')}
              ${a.attempterLogin ? `<span class="code-inline" style="font-size:11px; margin-left:6px;">${escHtml(a.attempterLogin)}</span>` : ''}
            </p>
            <p class="muted" style="margin:.25rem 0 0; font-size:.85rem;">v${a.testVersion} · ${escHtml(result)}</p>
          </div>
          ${a.status === 'completed'
            ? `<a class="btn btn-ghost btn--sm attempts-card-list__action" href="/tests/${TEST_ID}/attempts/${a.id}/review">Разбор</a>`
            : ''}
        </div>`;
      attemptsListEl.appendChild(li);
    });
  }

  function renderAssignList() {
    if (!assignListEl) return;
    assignListEl.innerHTML = '';
    assignPeople.forEach((p) => {
      const row = document.createElement('label');
      row.className = `assign-row${assignSelected.has(String(p.staffId)) ? ' assign-row--selected' : ''}`;
      row.innerHTML = `
        <input type="checkbox" ${assignSelected.has(String(p.staffId)) ? 'checked' : ''} />
        <span class="assign-row__text">
          <span class="assign-row__fio">${escHtml(p.fio || '—')}</span>
          ${p.webLogin ? `<span class="assign-row__login">${escHtml(p.webLogin)}</span>` : ''}
          <span class="assign-row__meta">${escHtml(p.department || '—')}${p.clinicUserId ? ' · есть учётка' : ' · нет учётки (создадим при назначении)'}</span>
        </span>`;
      const cb = row.querySelector('input');
      cb.addEventListener('change', () => {
        const k = String(p.staffId);
        if (cb.checked) assignSelected.add(k); else assignSelected.delete(k);
        row.classList.toggle('assign-row--selected', cb.checked);
      });
      assignListEl.appendChild(row);
    });
    if (!assignPeople.length) assignListEl.innerHTML = '<p class="muted" style="padding:.75rem;">Никого не найдено.</p>';
  }

  async function loadDirectory() {
    if (!assignListEl) return;
    assignStatusEl.textContent = 'Загружаем…';
    try {
      const params = new URLSearchParams();
      if (assignSearchEl.value.trim()) params.set('q', assignSearchEl.value.trim());
      if (assignDeptEl.value && assignDeptEl.value !== '__all__') params.set('department', assignDeptEl.value);
      params.set('clinic', assignClinicEl.value || 'all');
      const r = await fetch(`/api/auth/dev/assignment-directory?${params.toString()}`);
      const data = await r.json();
      if (!r.ok) throw new Error(data.error || 'Не удалось загрузить сотрудников');
      assignPeople = data.people || [];
      const depts = data.departments || [];
      if (assignDeptEl.options.length <= 1) {
        depts.forEach((d) => {
          const o = document.createElement('option');
          o.value = d;
          o.textContent = d;
          assignDeptEl.appendChild(o);
        });
      }
      assignSelected = new Set();
      renderAssignList();
      assignStatusEl.textContent = '';
    } catch (e) {
      assignStatusEl.textContent = e.message || 'Ошибка загрузки';
    }
  }

  if (assignSearchEl) {
    let t = null;
    assignSearchEl.addEventListener('input', () => {
      clearTimeout(t);
      t = setTimeout(loadDirectory, 350);
    });
    assignDeptEl.addEventListener('change', loadDirectory);
    assignClinicEl.addEventListener('change', loadDirectory);
    assignSelectAllBtn.addEventListener('click', () => {
      assignPeople.forEach((p) => assignSelected.add(String(p.staffId)));
      renderAssignList();
    });
    assignSubmitBtn.addEventListener('click', async () => {
      const selectedRows = assignPeople.filter((p) => assignSelected.has(String(p.staffId)));
      const userIds = selectedRows.filter((p) => p.clinicUserId).map((p) => p.clinicUserId);
      const staffIds = selectedRows.filter((p) => !p.clinicUserId && p.staffId != null).map((p) => p.staffId);
      if (!userIds.length && !staffIds.length) return;
      assignStatusEl.textContent = 'Назначаем…';
      try {
        const r = await fetch(`/api/tests/${TEST_ID}/assign`, {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ userIds, staffIds }),
        });
        const data = await r.json();
        if (!r.ok) throw new Error(data.error || 'Ошибка назначения');
        assignStatusEl.textContent = `Назначено: ${data.count ?? selectedRows.length}`;
      } catch (e) {
        assignStatusEl.textContent = e.message || 'Ошибка назначения';
      }
    });
    loadDirectory();
  }

  if (visibilityBtn) {
    visibilityBtn.addEventListener('click', async () => {
      const next = !chainActiveEl.checked;
      try {
        const r = await fetch(`/api/tests/${TEST_ID}`, {
          method: 'PATCH',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ chainActive: next }),
        });
        const data = await r.json();
        if (!r.ok) throw new Error(data.error || 'Ошибка изменения видимости');
        chainActiveEl.checked = !!next;
        chainActive = !!next;
        visibilityBtn.textContent = chainActive ? 'Скрыть из списка' : 'Снова показать в списке';
      } catch (e) {
        alert(e.message || 'Ошибка изменения видимости');
      }
    });
  }

  Promise.all([
    fetch(`/api/tests/${TEST_ID}/versions`).then((r) => r.json()).catch(() => null),
    fetch(`/api/tests/${TEST_ID}/attempts`).then((r) => r.json()).catch(() => null),
    fetch(`/api/tests/${TEST_ID}/summary`).then((r) => r.json()).catch(() => null),
  ]).then(([v, a, s]) => {
    if (v && Array.isArray(v.versions)) {
      renderVersions(v.versions);
      hasForkRisk = hasForkRisk || (v.versions.length > 1);
      if (typeof v.hasAttempts === 'boolean') {
        hasAnyAttempts = hasAnyAttempts || v.hasAttempts;
        hasForkRisk = hasForkRisk || v.hasAttempts;
      }
    }
    if (a && Array.isArray(a.attempts)) {
      renderAttempts(a.attempts);
      hasAnyAttempts = a.attempts.length > 0;
    }
    if (s && s.test) {
      if (introUpdatedEl) introUpdatedEl.textContent = fmtDt(s.test.updated_at || s.test.updatedAt);
      const versionEl = document.getElementById('intro-version');
      if (versionEl && s.test.version != null) versionEl.textContent = s.test.version;
      if (typeof s.test.hasAttempts === 'boolean') {
        hasAnyAttempts = hasAnyAttempts || s.test.hasAttempts;
        hasForkRisk = hasForkRisk || s.test.hasAttempts;
      }
      if (typeof s.test.versionCount === 'number') {
        hasForkRisk = hasForkRisk || s.test.versionCount > 1;
      }
    }
    updateForkBanner();
  });

  loadInitial();
  resetBaselineDraft();
  root.addEventListener('input', scheduleDirtyCheck);
  root.addEventListener('change', scheduleDirtyCheck);
})();