'use strict';
/* admin → sublog (submission log) section */
(function () {
  'use strict';
  let inited = false;
  const SL_STATUSES = { new:'На проверке', reviewed:'Проверено', accepted:'Принято', revision:'На доработке', resubmitted:'Повторно' };

  async function load() {
    const el = document.getElementById('sublog-list');
    const countEl = document.getElementById('sublog-count');
    const classId = document.getElementById('sublog-class-filter').value;
    el.innerHTML = '<div class="spinner"></div>';
    countEl.textContent = '';
    try {
      const url = classId ? `/api/submissions/log?class_id=${classId}` : '/api/submissions/log';
      const rows = await LS.api(url);

      // Populate class filter on first load
      const sel = document.getElementById('sublog-class-filter');
      if (sel.options.length <= 1 && rows.length) {
        const classMap = new Map();
        rows.forEach(r => { if (r.class_id && r.class_name) classMap.set(r.class_id, r.class_name); });
        classMap.forEach((name, id) => {
          const opt = document.createElement('option');
          opt.value = id; opt.textContent = name;
          sel.appendChild(opt);
        });
      }

      countEl.textContent = rows.length ? `${rows.length} записей` : '';

      if (!rows.length) {
        el.innerHTML = `<div class="sl-empty">
          <div class="sl-empty-icon"><i data-lucide="inbox" style="width:48px;height:48px"></i></div>
          Удалённых работ нет
        </div>`;
        if (window.lucide) lucide.createIcons({ nodes: [el] });
        return;
      }

      const ROLE_LABELS = { admin: 'Админ', teacher: 'Учитель', student: 'Ученик' };

      el.innerHTML = `<div class="sl-wrap"><table class="sl-table">
        <thead><tr>
          <th>Дата</th>
          <th>Ученик</th>
          <th>Файл</th>
          <th>Задание</th>
          <th>Класс</th>
          <th>Статус</th>
          <th>Оценка</th>
          <th>Удалил</th>
        </tr></thead>
        <tbody>${rows.map(r => {
          const dt = r.deleted_at ? new Date(r.deleted_at.includes('T') ? r.deleted_at : r.deleted_at.replace(' ','T')+'Z') : null;
          const dateStr = dt ? dt.toLocaleDateString('ru',{day:'numeric',month:'short'}) + ' ' + dt.toLocaleTimeString('ru',{hour:'2-digit',minute:'2-digit'}) : '—';
          const initials = (r.student_name || '?').split(' ').slice(0,2).map(w => w[0]?.toUpperCase() || '').join('');
          const st = r.status || 'new';
          const gradeVal = r.grade != null ? r.grade : null;
          const gradeCls = gradeVal != null ? (gradeVal >= 80 ? 'sl-grade-hi' : gradeVal >= 50 ? 'sl-grade-mid' : 'sl-grade-lo') : 'sl-grade-none';
          const roleCls = 'sl-role-' + (r.deleted_by_role || 'student');
          return `<tr>
            <td><span class="sl-date">${dateStr}</span></td>
            <td><span class="sl-student"><span class="sl-student-avatar">${initials}</span>${esc(r.student_name || '—')}</span></td>
            <td><span class="sl-file" title="${esc(r.original_name || '')}">${esc(r.original_name || '—')}</span></td>
            <td><span class="sl-assignment">${esc(r.assignment_title || '—')}</span></td>
            <td><span class="sl-class">${esc(r.class_name || '—')}</span></td>
            <td><span class="sl-status sl-status-${st}">${SL_STATUSES[st] || st}</span></td>
            <td><span class="sl-grade ${gradeCls}">${gradeVal != null ? gradeVal : '—'}</span></td>
            <td><span class="sl-deleted-by">${esc(r.deleted_by_name || '—')} <span class="sl-role-badge ${roleCls}">${ROLE_LABELS[r.deleted_by_role] || r.deleted_by_role || '?'}</span></span></td>
          </tr>`;
        }).join('')}</tbody>
      </table></div>`;
      document.getElementById('btn-clear-sublog').style.display = '';
    } catch (e) {
      el.innerHTML = `<div class="sl-empty" style="color:#c0306a">Ошибка: ${esc(e.message)}</div>`;
    }
  }

  async function clearSubmissionLog() {
    if (!await LS.confirm('Очистить весь журнал удалённых работ? Это действие необратимо.', { title: 'Очистка журнала', confirmText: 'Очистить', danger: true })) return;
    try {
      await LS.api('/api/submissions/log', { method: 'DELETE' });
      document.getElementById('btn-clear-sublog').style.display = 'none';
      document.getElementById('sublog-count').textContent = '';
      document.getElementById('sublog-list').innerHTML = `<div class="sl-empty">
        <div class="sl-empty-icon"><i data-lucide="inbox" style="width:48px;height:48px"></i></div>
        Журнал очищен
      </div>`;
      if (window.lucide) lucide.createIcons({ nodes: [document.getElementById('sublog-list')] });
      LS.toast('Журнал очищен', 'success');
    } catch (e) { LS.toast('Ошибка: ' + e.message, 'error'); }
  }

  // Expose handlers used by HTML onclicks
  window.loadSubmissionLog = load;
  window.clearSubmissionLog = clearSubmissionLog;

  window.AdminSections = window.AdminSections || {};
  window.AdminSections.sublog = {
    init: async () => { if (inited) return; inited = true; await load(); },
    reload: load,
  };
})();