/* ===== Partner Management ===== */
let partners = [];
let partnerWorkers = [];
let selectedPartnerId = null;
let editingWorkerId = null;

async function loadPartners() {
    try {
        const isActive = document.getElementById('partnerFilterActive')?.value;
        const search = document.getElementById('partnerSearch')?.value?.trim() || '';
        const params = new URLSearchParams();
        if (isActive !== '' && isActive !== undefined) params.set('is_active', isActive);
        if (search) params.set('search', search);
        const r = await api('/partners/?' + params.toString());
        partners = r.data || [];
        renderPartnerList();
    } catch (e) {
        showToast('업체 목록 로드 실패: ' + e.message, 'error');
    }
}

function renderPartnerList() {
    const c = document.getElementById('partnerList');
    if (!partners.length) {
        c.innerHTML = '<div class="text-gray-400 text-center py-8 text-sm">등록된 협력업체가 없습니다</div>';
        return;
    }
    c.innerHTML = partners.map(p => {
        const types = tryParseJson(p.business_type) || [];
        const typeStr = types.length ? types.map(t => `<span class="badge badge-blue text-xs">${escapeHtml(t)}</span>`).join(' ') : '';
        const insuranceWarning = isInsuranceExpiringSoon(p.insurance_expiry);
        return `<div class="flex items-center justify-between p-3 bg-gray-50 rounded-lg hover:bg-gray-100 transition-colors cursor-pointer ${selectedPartnerId === p.id ? 'ring-2 ring-emerald-400' : ''}" onclick="selectPartner(${p.id})">
            <div class="flex-1 min-w-0">
                <div class="text-sm font-medium text-gray-800 flex items-center gap-2">
                    <i class="fas fa-building text-gray-400 text-xs"></i>
                    ${escapeHtml(p.company_name)}
                    ${!p.is_active ? '<span class="badge badge-gray">비활성</span>' : ''}
                    ${insuranceWarning ? '<span class="badge badge-red"><i class="fas fa-exclamation-triangle mr-1"></i>보험만료</span>' : ''}
                </div>
                <div class="text-xs text-gray-500 mt-0.5 flex items-center gap-2 flex-wrap">
                    ${p.business_number ? `<span>${p.business_number}</span>` : ''}
                    ${p.representative ? `<span>${escapeHtml(p.representative)}</span>` : ''}
                    ${typeStr}
                </div>
            </div>
            <div class="flex gap-1 ml-2">
                <button onclick="event.stopPropagation(); openEditPartner(${p.id})" class="p-1.5 text-slate-500 hover:text-slate-700 hover:bg-slate-200 rounded" title="수정"><i class="fas fa-pen text-xs"></i></button>
                ${p.is_active ? `<button onclick="event.stopPropagation(); deactivatePartner(${p.id}, '${escapeHtml(p.company_name).replace(/'/g, "\\'")}')" class="p-1.5 text-red-400 hover:text-red-600 hover:bg-red-100 rounded" title="비활성화"><i class="fas fa-ban text-xs"></i></button>` : ''}
            </div>
        </div>`;
    }).join('');
}

function isInsuranceExpiringSoon(expiry) {
    if (!expiry) return false;
    const exp = new Date(expiry);
    const now = new Date();
    const diff = (exp - now) / (1000 * 60 * 60 * 24);
    return diff <= 30 && diff >= 0;
}

function tryParseJson(val) {
    if (!val) return null;
    if (Array.isArray(val)) return val;
    try { return JSON.parse(val); } catch { return null; }
}

/* ===== 업체 상세 + 작업자 ===== */
async function selectPartner(id) {
    selectedPartnerId = id;
    renderPartnerList(); // 하이라이트 갱신
    try {
        const r = await api(`/partners/${id}`);
        const p = r.data;
        partnerWorkers = p.workers || [];
        renderPartnerDetail(p);
        document.getElementById('partnerDetail').classList.remove('hidden');
        document.getElementById('partnerEmpty').classList.add('hidden');
    } catch (e) {
        showToast('상세 조회 실패: ' + e.message, 'error');
    }
}

function renderPartnerDetail(p) {
    const types = tryParseJson(p.business_type) || [];
    document.getElementById('detailCompanyName').textContent = p.company_name;
    document.getElementById('detailInfo').innerHTML = `
        <div class="grid grid-cols-2 gap-3 text-sm">
            <div><span class="text-gray-500">사업자번호:</span> <span class="font-medium">${escapeHtml(p.business_number) || '-'}</span></div>
            <div><span class="text-gray-500">대표자:</span> <span class="font-medium">${escapeHtml(p.representative) || '-'}</span></div>
            <div><span class="text-gray-500">담당자:</span> <span class="font-medium">${escapeHtml(p.contact_name) || '-'}</span></div>
            <div><span class="text-gray-500">연락처:</span> <span class="font-medium">${escapeHtml(p.contact_phone) || '-'}</span></div>
            <div class="col-span-2"><span class="text-gray-500">주소:</span> <span class="font-medium">${escapeHtml(p.address) || '-'}</span></div>
            <div><span class="text-gray-500">업종:</span> ${types.map(t => `<span class="badge badge-blue">${escapeHtml(t)}</span>`).join(' ') || '-'}</div>
            <div><span class="text-gray-500">산재보험:</span> <span class="font-medium">${escapeHtml(p.insurance_number) || '-'}</span> ${p.insurance_expiry ? `(만료: ${formatDate(p.insurance_expiry)})` : ''}</div>
            ${p.notes ? `<div class="col-span-2"><span class="text-gray-500">비고:</span> ${escapeHtml(p.notes)}</div>` : ''}
        </div>`;
    renderWorkerList();
}

function renderWorkerList() {
    const c = document.getElementById('workerList');
    if (!partnerWorkers.length) {
        c.innerHTML = '<div class="text-gray-400 text-center py-4 text-sm">등록된 작업자가 없습니다</div>';
        return;
    }
    c.innerHTML = partnerWorkers.map(w => `
        <div class="flex items-center justify-between p-2 bg-gray-50 rounded hover:bg-gray-100">
            <div class="flex-1 min-w-0">
                <div class="text-sm font-medium">${escapeHtml(w.worker_name)}
                    ${w.is_team_leader ? '<span class="badge badge-amber ml-1">팀장</span>' : ''}
                    ${!w.is_active ? '<span class="badge badge-gray ml-1">비활성</span>' : ''}
                </div>
                <div class="text-xs text-gray-500 flex gap-2 mt-0.5">
                    ${w.position ? `<span>${escapeHtml(w.position)}</span>` : ''}
                    ${w.phone ? `<span>${escapeHtml(w.phone)}</span>` : ''}
                    ${w.safety_training_date ? `<span>안전교육: ${formatDate(w.safety_training_date)}</span>` : ''}
                </div>
            </div>
            <div class="flex gap-1">
                <button onclick="openEditWorker(${w.id})" class="p-1 text-slate-500 hover:text-slate-700 rounded" title="수정"><i class="fas fa-pen text-xs"></i></button>
                ${w.is_active ? `<button onclick="doDeactivateWorker(${w.id})" class="p-1 text-red-400 hover:text-red-600 rounded" title="비활성화"><i class="fas fa-ban text-xs"></i></button>` : ''}
            </div>
        </div>`).join('');
}

/* ===== 업체 등록 ===== */
function openAddPartner() { document.getElementById('addPartnerModal').classList.remove('hidden'); }
function closeAddPartner() { document.getElementById('addPartnerModal').classList.add('hidden'); document.getElementById('addPartnerForm').reset(); }

async function submitAddPartner(e) {
    e.preventDefault();
    const typesRaw = document.getElementById('newBusinessType').value.trim();
    const data = {
        company_name: document.getElementById('newCompanyName').value.trim(),
        business_number: document.getElementById('newBusinessNumber').value.trim() || null,
        representative: document.getElementById('newRepresentative').value.trim() || null,
        contact_name: document.getElementById('newContactName').value.trim() || null,
        contact_phone: document.getElementById('newContactPhone').value.trim() || null,
        address: document.getElementById('newAddress').value.trim() || null,
        business_type: typesRaw ? typesRaw.split(',').map(s => s.trim()).filter(Boolean) : null,
        insurance_number: document.getElementById('newInsuranceNumber').value.trim() || null,
        insurance_expiry: document.getElementById('newInsuranceExpiry').value || null,
        notes: document.getElementById('newPartnerNotes').value.trim() || null,
    };
    if (!data.company_name) { showToast('업체명은 필수입니다', 'error'); return; }
    try {
        await api('/partners/', { method: 'POST', body: JSON.stringify(data) });
        showToast('업체가 등록되었습니다');
        closeAddPartner();
        await loadPartners();
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 업체 수정 ===== */
function openEditPartner(id) {
    const p = partners.find(x => x.id === id);
    if (!p) return;
    const types = tryParseJson(p.business_type) || [];
    document.getElementById('editPartnerId').value = p.id;
    document.getElementById('editCompanyName').value = p.company_name;
    document.getElementById('editBusinessNumber').value = p.business_number || '';
    document.getElementById('editRepresentative').value = p.representative || '';
    document.getElementById('editContactName').value = p.contact_name || '';
    document.getElementById('editContactPhone').value = p.contact_phone || '';
    document.getElementById('editAddress').value = p.address || '';
    document.getElementById('editBusinessType').value = types.join(', ');
    document.getElementById('editInsuranceNumber').value = p.insurance_number || '';
    document.getElementById('editInsuranceExpiry').value = p.insurance_expiry ? formatDate(p.insurance_expiry) : '';
    document.getElementById('editPartnerNotes').value = p.notes || '';
    document.getElementById('editPartnerModal').classList.remove('hidden');
}
function closeEditPartner() { document.getElementById('editPartnerModal').classList.add('hidden'); }

async function submitEditPartner(e) {
    e.preventDefault();
    const id = document.getElementById('editPartnerId').value;
    const typesRaw = document.getElementById('editBusinessType').value.trim();
    const data = {
        company_name: document.getElementById('editCompanyName').value.trim(),
        business_number: document.getElementById('editBusinessNumber').value.trim() || null,
        representative: document.getElementById('editRepresentative').value.trim() || null,
        contact_name: document.getElementById('editContactName').value.trim() || null,
        contact_phone: document.getElementById('editContactPhone').value.trim() || null,
        address: document.getElementById('editAddress').value.trim() || null,
        business_type: typesRaw ? typesRaw.split(',').map(s => s.trim()).filter(Boolean) : null,
        insurance_number: document.getElementById('editInsuranceNumber').value.trim() || null,
        insurance_expiry: document.getElementById('editInsuranceExpiry').value || null,
        notes: document.getElementById('editPartnerNotes').value.trim() || null,
    };
    try {
        await api(`/partners/${id}`, { method: 'PUT', body: JSON.stringify(data) });
        showToast('수정되었습니다');
        closeEditPartner();
        await loadPartners();
        if (selectedPartnerId == id) selectPartner(id);
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 업체 비활성화 ===== */
async function deactivatePartner(id, name) {
    if (!confirm(`"${name}" 업체를 비활성화하시겠습니까?`)) return;
    try {
        await api(`/partners/${id}`, { method: 'DELETE' });
        showToast('비활성화 완료');
        await loadPartners();
        if (selectedPartnerId === id) {
            document.getElementById('partnerDetail').classList.add('hidden');
            document.getElementById('partnerEmpty').classList.remove('hidden');
            selectedPartnerId = null;
        }
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 작업자 등록 ===== */
function openAddWorker() {
    if (!selectedPartnerId) { showToast('업체를 먼저 선택해주세요', 'error'); return; }
    document.getElementById('addWorkerModal').classList.remove('hidden');
}
function closeAddWorker() { document.getElementById('addWorkerModal').classList.add('hidden'); document.getElementById('addWorkerForm').reset(); }

async function submitAddWorker(e) {
    e.preventDefault();
    const data = {
        worker_name: document.getElementById('newWorkerName').value.trim(),
        position: document.getElementById('newWorkerPosition').value.trim() || null,
        is_team_leader: document.getElementById('newWorkerIsLeader').checked,
        phone: document.getElementById('newWorkerPhone').value.trim() || null,
        safety_training_date: document.getElementById('newWorkerSafetyDate').value || null,
        notes: document.getElementById('newWorkerNotes').value.trim() || null,
    };
    if (!data.worker_name) { showToast('작업자명은 필수입니다', 'error'); return; }
    try {
        await api(`/partners/${selectedPartnerId}/workers`, { method: 'POST', body: JSON.stringify(data) });
        showToast('작업자가 등록되었습니다');
        closeAddWorker();
        await selectPartner(selectedPartnerId);
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 작업자 수정 ===== */
function openEditWorker(id) {
    const w = partnerWorkers.find(x => x.id === id);
    if (!w) return;
    editingWorkerId = id;
    document.getElementById('editWorkerName').value = w.worker_name;
    document.getElementById('editWorkerPosition').value = w.position || '';
    document.getElementById('editWorkerIsLeader').checked = w.is_team_leader;
    document.getElementById('editWorkerPhone').value = w.phone || '';
    document.getElementById('editWorkerSafetyDate').value = w.safety_training_date ? formatDate(w.safety_training_date) : '';
    document.getElementById('editWorkerNotes').value = w.notes || '';
    document.getElementById('editWorkerModal').classList.remove('hidden');
}
function closeEditWorker() { document.getElementById('editWorkerModal').classList.add('hidden'); editingWorkerId = null; }

async function submitEditWorker(e) {
    e.preventDefault();
    if (!editingWorkerId) return;
    const data = {
        worker_name: document.getElementById('editWorkerName').value.trim(),
        position: document.getElementById('editWorkerPosition').value.trim() || null,
        is_team_leader: document.getElementById('editWorkerIsLeader').checked,
        phone: document.getElementById('editWorkerPhone').value.trim() || null,
        safety_training_date: document.getElementById('editWorkerSafetyDate').value || null,
        notes: document.getElementById('editWorkerNotes').value.trim() || null,
    };
    try {
        await api(`/partners/workers/${editingWorkerId}`, { method: 'PUT', body: JSON.stringify(data) });
        showToast('수정되었습니다');
        closeEditWorker();
        await selectPartner(selectedPartnerId);
    } catch (e) { showToast(e.message, 'error'); }
}

async function doDeactivateWorker(id) {
    if (!confirm('이 작업자를 비활성화하시겠습니까?')) return;
    try {
        await api(`/partners/workers/${id}`, { method: 'DELETE' });
        showToast('비활성화 완료');
        await selectPartner(selectedPartnerId);
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== Init ===== */
function initPartnerPage() {
    if (!initAuth()) return;
    document.getElementById('addPartnerForm').addEventListener('submit', submitAddPartner);
    document.getElementById('editPartnerForm').addEventListener('submit', submitEditPartner);
    document.getElementById('addWorkerForm').addEventListener('submit', submitAddWorker);
    document.getElementById('editWorkerForm').addEventListener('submit', submitEditWorker);
    document.getElementById('partnerSearch')?.addEventListener('input', debounce(loadPartners, 300));
    document.getElementById('partnerFilterActive')?.addEventListener('change', loadPartners);
    loadPartners();
}

function debounce(fn, ms) {
    let t; return function(...args) { clearTimeout(t); t = setTimeout(() => fn.apply(this, args), ms); };
}