/* ===== Education Management ===== */
let educationList = [];
let editingEducationId = null;

async function loadEducation() {
    try {
        const dateFrom = document.getElementById('eduDateFrom')?.value || '';
        const dateTo = document.getElementById('eduDateTo')?.value || '';
        const targetType = document.getElementById('eduTargetType')?.value || '';
        const params = new URLSearchParams();
        if (dateFrom) params.set('date_from', dateFrom);
        if (dateTo) params.set('date_to', dateTo);
        if (targetType) params.set('target_type', targetType);
        const r = await api('/education?' + params.toString());
        educationList = r.data || [];
        renderEducationList();
    } catch (e) {
        showToast('교육 목록 로드 실패: ' + e.message, 'error');
    }
}

function renderEducationList() {
    const tbody = document.getElementById('educationTableBody');
    if (!educationList.length) {
        tbody.innerHTML = '<tr><td colspan="7" class="text-center text-gray-400 py-8">등록된 안전교육이 없습니다</td></tr>';
        return;
    }
    const typeLabels = { day_labor: '일용공', partner_schedule: '협력업체', manual: '수동등록' };
    const statusLabels = { planned: '예정', completed: '완료', cancelled: '취소' };
    const statusColors = { planned: 'badge-amber', completed: 'badge-green', cancelled: 'badge-gray' };
    tbody.innerHTML = educationList.map(e => {
        const attendeeCount = e.attendees ? (typeof e.attendees === 'string' ? JSON.parse(e.attendees) : e.attendees).length : 0;
        return `<tr>
            <td>${formatDate(e.education_date)}</td>
            <td><span class="badge ${e.target_type === 'day_labor' ? 'badge-blue' : e.target_type === 'partner_schedule' ? 'badge-green' : 'badge-gray'}">${typeLabels[e.target_type] || e.target_type}</span></td>
            <td>${escapeHtml(e.educator) || '-'}</td>
            <td class="text-center">${attendeeCount}명</td>
            <td><span class="badge ${statusColors[e.status] || 'badge-gray'}">${statusLabels[e.status] || e.status}</span></td>
            <td class="hide-mobile">${escapeHtml(e.notes) || '-'}</td>
            <td class="text-right">
                <button onclick="openEditEducation(${e.id})" class="text-gray-400 hover:text-gray-600 text-xs" title="수정"><i class="fas fa-pen"></i></button>
                <button onclick="doDeleteEducation(${e.id})" class="text-gray-400 hover:text-red-500 text-xs ml-1" title="삭제"><i class="fas fa-trash"></i></button>
            </td>
        </tr>`;
    }).join('');
}

/* ===== Add education modal ===== */
function openAddEducation() {
    document.getElementById('addEducationModal').classList.remove('hidden');
}
function closeAddEducation() {
    document.getElementById('addEducationModal').classList.add('hidden');
    document.getElementById('addEducationForm').reset();
}

async function submitAddEducation(e) {
    e.preventDefault();
    const attendeesRaw = document.getElementById('newAttendees').value.trim();
    const attendees = attendeesRaw ? attendeesRaw.split('\n').map(line => {
        const parts = line.split(',').map(s => s.trim());
        return { name: parts[0] || '', company: parts[1] || '' };
    }).filter(a => a.name) : [];

    const data = {
        target_type: document.getElementById('newTargetType').value,
        education_date: document.getElementById('newEducationDate').value,
        educator: document.getElementById('newEducator').value.trim() || null,
        attendees: attendees,
        status: document.getElementById('newEduStatus').value || 'planned',
        notes: document.getElementById('newEduNotes').value.trim() || null,
    };
    if (!data.education_date) { showToast('교육일은 필수입니다', 'error'); return; }
    try {
        await api('/education', { method: 'POST', body: JSON.stringify(data) });
        showToast('안전교육이 등록되었습니다');
        closeAddEducation();
        await loadEducation();
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== Edit education ===== */
function openEditEducation(id) {
    const edu = educationList.find(x => x.id === id);
    if (!edu) return;
    editingEducationId = id;
    document.getElementById('editTargetType').value = edu.target_type;
    document.getElementById('editEducationDate').value = formatDate(edu.education_date);
    document.getElementById('editEducator').value = edu.educator || '';
    document.getElementById('editEduStatus').value = edu.status;
    document.getElementById('editEduNotes').value = edu.notes || '';
    const attendees = edu.attendees ? (typeof edu.attendees === 'string' ? JSON.parse(edu.attendees) : edu.attendees) : [];
    document.getElementById('editAttendees').value = attendees.map(a => `${a.name}${a.company ? ', ' + a.company : ''}`).join('\n');
    document.getElementById('editEducationModal').classList.remove('hidden');
}
function closeEditEducation() {
    document.getElementById('editEducationModal').classList.add('hidden');
    editingEducationId = null;
}

async function submitEditEducation(e) {
    e.preventDefault();
    if (!editingEducationId) return;
    const attendeesRaw = document.getElementById('editAttendees').value.trim();
    const attendees = attendeesRaw ? attendeesRaw.split('\n').map(line => {
        const parts = line.split(',').map(s => s.trim());
        return { name: parts[0] || '', company: parts[1] || '' };
    }).filter(a => a.name) : [];

    const data = {
        target_type: document.getElementById('editTargetType').value,
        education_date: document.getElementById('editEducationDate').value,
        educator: document.getElementById('editEducator').value.trim() || null,
        attendees: attendees,
        status: document.getElementById('editEduStatus').value,
        notes: document.getElementById('editEduNotes').value.trim() || null,
    };
    try {
        await api(`/education/${editingEducationId}`, { method: 'PUT', body: JSON.stringify(data) });
        showToast('수정되었습니다');
        closeEditEducation();
        await loadEducation();
    } catch (e) { showToast(e.message, 'error'); }
}

async function doDeleteEducation(id) {
    if (!confirm('이 교육 기록을 삭제하시겠습니까?')) return;
    try {
        await api(`/education/${id}`, { method: 'DELETE' });
        showToast('삭제되었습니다');
        await loadEducation();
    } catch (e) { showToast(e.message, 'error'); }
}

function initEducationPage() {
    if (!initAuth()) return;
    document.getElementById('addEducationForm').addEventListener('submit', submitAddEducation);
    document.getElementById('editEducationForm').addEventListener('submit', submitEditEducation);
    document.getElementById('eduDateFrom')?.addEventListener('change', loadEducation);
    document.getElementById('eduDateTo')?.addEventListener('change', loadEducation);
    document.getElementById('eduTargetType')?.addEventListener('change', loadEducation);
    loadEducation();
}