/* ===== Visit Management ===== */
let todayVisits = [];
let editingVisitId = null;

async function loadTodayVisits() {
    try {
        const r = await api('/daily-visits/today');
        const { visits, stats } = r.data;
        todayVisits = visits;
        renderStats(stats);
        renderVisitTable(visits);
    } catch (e) {
        showToast('데이터 로드 실패: ' + e.message, 'error');
    }
}

function renderStats(s) {
    document.getElementById('statTotal').textContent = s.total || 0;
    document.getElementById('statCheckedIn').textContent = s.checked_in || 0;
    document.getElementById('statCheckedOut').textContent = s.checked_out || 0;
    document.getElementById('statVisitors').textContent = s.total_visitors || 0;
}

function renderVisitTable(visits) {
    const tbody = document.getElementById('visitTableBody');
    if (!visits.length) {
        tbody.innerHTML = '<tr><td colspan="8" class="text-center text-gray-400 py-8">오늘 방문 기록이 없습니다</td></tr>';
        return;
    }
    tbody.innerHTML = visits.map(v => {
        const companyName = v.partner_company_name || v.company_name || '-';
        const safetyIcon = v.safety_education_yn
            ? '<i class="fas fa-check-circle text-emerald-500"></i>'
            : '<i class="fas fa-exclamation-triangle text-amber-500 safety-warning" title="안전교육 미이수"></i>';
        const actions = v.status === 'checked_in'
            ? `<button onclick="doCheckout(${v.id})" class="text-blue-600 hover:text-blue-800 text-xs px-2 py-1 border border-blue-200 rounded hover:bg-blue-50">체크아웃</button>`
            : '';
        return `<tr>
            <td>${escapeHtml(companyName)}</td>
            <td>${escapeHtml(v.visitor_name)}</td>
            <td class="text-center">${v.visitor_count}</td>
            <td>${purposeBadge(v.purpose)}</td>
            <td class="hide-mobile">${safetyIcon}</td>
            <td>${formatTime(v.check_in_time)}</td>
            <td>${statusBadge(v.status)}</td>
            <td class="text-right">
                ${actions}
                <button onclick="openEditVisit(${v.id})" class="text-gray-400 hover:text-gray-600 text-xs ml-1" title="수정"><i class="fas fa-pen"></i></button>
                <button onclick="doDeleteVisit(${v.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('');
}

/* ===== 업체 자동완성 ===== */
let companySearchTimeout = null;
let selectedCompanyId = null;

function initCompanySearch() {
    const input = document.getElementById('companySearch');
    const dropdown = document.getElementById('companyDropdown');
    const manualToggle = document.getElementById('manualCompanyToggle');
    const manualInput = document.getElementById('manualCompanyName');

    input.addEventListener('input', () => {
        clearTimeout(companySearchTimeout);
        selectedCompanyId = null;
        const q = input.value.trim();
        if (q.length < 1) { dropdown.classList.add('hidden'); return; }
        companySearchTimeout = setTimeout(async () => {
            try {
                const r = await api('/partners/search?q=' + encodeURIComponent(q));
                const items = r.data || [];
                if (items.length === 0) {
                    dropdown.innerHTML = '<div class="px-3 py-2 text-sm text-gray-400">검색 결과 없음</div>';
                } else {
                    dropdown.innerHTML = items.map(c =>
                        `<div class="px-3 py-2 text-sm hover:bg-emerald-50 cursor-pointer" onclick="selectCompany(${c.id}, '${escapeHtml(c.company_name).replace(/'/g, "\\'")}')">
                            <span class="font-medium">${escapeHtml(c.company_name)}</span>
                            ${c.business_number ? `<span class="text-gray-400 text-xs ml-2">${c.business_number}</span>` : ''}
                        </div>`
                    ).join('');
                }
                dropdown.classList.remove('hidden');
            } catch (e) { dropdown.classList.add('hidden'); }
        }, 300);
    });

    input.addEventListener('blur', () => setTimeout(() => dropdown.classList.add('hidden'), 200));

    manualToggle.addEventListener('change', () => {
        if (manualToggle.checked) {
            input.parentElement.classList.add('hidden');
            manualInput.parentElement.classList.remove('hidden');
            selectedCompanyId = null;
            input.value = '';
        } else {
            input.parentElement.classList.remove('hidden');
            manualInput.parentElement.classList.add('hidden');
            manualInput.value = '';
        }
    });
}

function selectCompany(id, name) {
    selectedCompanyId = id;
    document.getElementById('companySearch').value = name;
    document.getElementById('companyDropdown').classList.add('hidden');
}

/* ===== 인원수 +-  ===== */
function initCounterButtons() {
    document.getElementById('countMinus').addEventListener('click', () => {
        const el = document.getElementById('visitorCount');
        const v = parseInt(el.value) || 1;
        if (v > 1) el.value = v - 1;
    });
    document.getElementById('countPlus').addEventListener('click', () => {
        const el = document.getElementById('visitorCount');
        el.value = (parseInt(el.value) || 0) + 1;
    });
}

/* ===== 추가정보 접이식 ===== */
function toggleExtra() {
    document.getElementById('extraFields').classList.toggle('open');
    const icon = document.getElementById('extraToggleIcon');
    icon.classList.toggle('fa-chevron-down');
    icon.classList.toggle('fa-chevron-up');
}

/* ===== 방문 등록 ===== */
async function submitVisit(e) {
    e.preventDefault();
    const manualMode = document.getElementById('manualCompanyToggle').checked;
    const company_id = manualMode ? null : selectedCompanyId;
    const company_name = manualMode ? document.getElementById('manualCompanyName').value.trim() : null;

    if (!company_id && !company_name) {
        showToast('업체를 선택하거나 입력해주세요', 'error'); return;
    }

    const data = {
        company_id,
        company_name: company_name || document.getElementById('companySearch').value.trim(),
        visitor_name: document.getElementById('visitorName').value.trim(),
        visitor_count: parseInt(document.getElementById('visitorCount').value) || 1,
        purpose: document.getElementById('visitPurpose').value,
        purpose_detail: document.getElementById('purposeDetail').value.trim() || null,
        workplace_name: document.getElementById('workplaceName').value.trim() || null,
        safety_education_yn: document.getElementById('safetyCheck').checked,
        vehicle_number: document.getElementById('vehicleNumber').value.trim() || null,
        notes: document.getElementById('visitNotes').value.trim() || null,
        managing_department: document.getElementById('managingDept').value || null,
    };

    if (!data.visitor_name) { showToast('방문자명을 입력해주세요', 'error'); return; }
    if (!data.purpose) { showToast('방문 목적을 선택해주세요', 'error'); return; }

    try {
        await api('/daily-visits/', { method: 'POST', body: JSON.stringify(data) });
        showToast('방문이 등록되었습니다');
        document.getElementById('visitForm').reset();
        selectedCompanyId = null;
        document.getElementById('manualCompanyToggle').checked = false;
        document.getElementById('companySearch').parentElement.classList.remove('hidden');
        document.getElementById('manualCompanyName').parentElement.classList.add('hidden');
        document.getElementById('visitorCount').value = '1';
        await loadTodayVisits();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

/* ===== 체크아웃 ===== */
async function doCheckout(id) {
    try {
        await api(`/daily-visits/${id}/checkout`, { method: 'PUT', body: JSON.stringify({}) });
        showToast('체크아웃 완료');
        await loadTodayVisits();
    } catch (e) { showToast(e.message, 'error'); }
}

async function doBulkCheckout() {
    const checkedIn = todayVisits.filter(v => v.status === 'checked_in');
    if (checkedIn.length === 0) { showToast('체크인 중인 방문이 없습니다', 'error'); return; }
    if (!confirm(`체크인 중인 ${checkedIn.length}건을 모두 체크아웃 하시겠습니까?`)) return;
    try {
        const r = await api('/daily-visits/bulk-checkout', { method: 'POST', body: JSON.stringify({}) });
        showToast(`${r.data.affected}건 체크아웃 완료`);
        await loadTodayVisits();
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 수정 ===== */
function openEditVisit(id) {
    const v = todayVisits.find(x => x.id === id);
    if (!v) return;
    editingVisitId = id;
    document.getElementById('editVisitorName').value = v.visitor_name;
    document.getElementById('editVisitorCount').value = v.visitor_count;
    document.getElementById('editPurpose').value = v.purpose;
    document.getElementById('editPurposeDetail').value = v.purpose_detail || '';
    document.getElementById('editWorkplace').value = v.workplace_name || '';
    document.getElementById('editSafetyCheck').checked = v.safety_education_yn;
    document.getElementById('editVehicle').value = v.vehicle_number || '';
    document.getElementById('editNotes').value = v.notes || '';
    document.getElementById('editVisitModal').classList.remove('hidden');
}

function closeEditVisit() {
    document.getElementById('editVisitModal').classList.add('hidden');
    editingVisitId = null;
}

async function submitEditVisit(e) {
    e.preventDefault();
    if (!editingVisitId) return;
    const data = {
        visitor_name: document.getElementById('editVisitorName').value.trim(),
        visitor_count: parseInt(document.getElementById('editVisitorCount').value) || 1,
        purpose: document.getElementById('editPurpose').value,
        purpose_detail: document.getElementById('editPurposeDetail').value.trim() || null,
        workplace_name: document.getElementById('editWorkplace').value.trim() || null,
        safety_education_yn: document.getElementById('editSafetyCheck').checked,
        vehicle_number: document.getElementById('editVehicle').value.trim() || null,
        notes: document.getElementById('editNotes').value.trim() || null,
    };
    try {
        await api(`/daily-visits/${editingVisitId}`, { method: 'PUT', body: JSON.stringify(data) });
        showToast('수정되었습니다');
        closeEditVisit();
        await loadTodayVisits();
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== 삭제 ===== */
async function doDeleteVisit(id) {
    if (!confirm('이 방문 기록을 삭제하시겠습니까?')) return;
    try {
        await api(`/daily-visits/${id}`, { method: 'DELETE' });
        showToast('삭제되었습니다');
        await loadTodayVisits();
    } catch (e) { showToast(e.message, 'error'); }
}

/* ===== CSV 내보내기 ===== */
async function exportVisits() {
    const token = getToken();
    const dateFrom = document.getElementById('exportDateFrom')?.value || '';
    const dateTo = document.getElementById('exportDateTo')?.value || '';
    let url = API_BASE + '/daily-visits/export?';
    if (dateFrom) url += 'date_from=' + dateFrom + '&';
    if (dateTo) url += 'date_to=' + dateTo + '&';
    const res = await fetch(url, { headers: { 'Authorization': `Bearer ${token}` } });
    if (!res.ok) { showToast('내보내기 실패', 'error'); return; }
    const blob = await res.blob();
    const a = document.createElement('a');
    a.href = URL.createObjectURL(blob);
    a.download = `visits_${dateFrom || 'all'}_${dateTo || 'all'}.csv`;
    a.click();
}

/* ===== Init ===== */
function initVisitPage() {
    if (!initAuth()) return;
    initCompanySearch();
    initCounterButtons();
    document.getElementById('visitForm').addEventListener('submit', submitVisit);
    document.getElementById('editVisitForm').addEventListener('submit', submitEditVisit);
    loadTodayVisits();
}