/* ===== Visit Request (출입 신청) ===== */
let myRequests = [];
let categories = [];
let workplaces = [];
let purposes = [];
let departments = [];

/* ===== Status badge for visit requests ===== */
function vrStatusBadge(s) {
    const m = {
        pending:             ['badge-amber', '대기중'],
        approved:            ['badge-green', '승인됨'],
        rejected:            ['badge-red',   '반려됨'],
        training_completed:  ['badge-blue',  '교육완료'],
        checked_in:          ['badge-blue',  '체크인'],
        checked_out:         ['badge-gray',  '체크아웃']
    };
    const [cls, label] = m[s] || ['badge-gray', s];
    return `<span class="badge ${cls}">${label}</span>`;
}

function requestTypeBadge(t) {
    return t === 'internal'
        ? '<span class="badge badge-blue">내부</span>'
        : '<span class="badge badge-amber">외부</span>';
}

/* ===== Toggle form fields based on request type ===== */
function toggleRequestType() {
    const isInternal = document.querySelector('input[name="requestType"]:checked')?.value === 'internal';
    document.getElementById('companyField').style.display = isInternal ? 'none' : '';
    document.getElementById('countField').style.display = isInternal ? 'none' : '';
    document.getElementById('departmentField').style.display = isInternal ? '' : 'none';
    document.getElementById('visitorNameRequired').classList.toggle('hidden', !isInternal);
}

/* ===== Load form data (purposes, categories, departments) ===== */
async function loadFormData() {
    try {
        const [purposeRes, categoryRes, deptRes] = await Promise.all([
            api('/visit-requests/purposes/active'),
            api('/visit-requests/categories'),
            api('/visit-requests/departments')
        ]);
        purposes = purposeRes.data || [];
        categories = categoryRes.data || [];
        departments = deptRes.data || [];

        const purposeSelect = document.getElementById('purposeId');
        purposeSelect.innerHTML = '<option value="">선택</option>' +
            purposes.map(p => `<option value="${p.purpose_id}">${escapeHtml(p.purpose_name)}</option>`).join('');

        const categorySelect = document.getElementById('categoryId');
        categorySelect.innerHTML = '<option value="">선택</option>' +
            categories.map(c => `<option value="${c.category_id}">${escapeHtml(c.category_name)}</option>`).join('');

        const deptSelect = document.getElementById('departmentId');
        deptSelect.innerHTML = '<option value="">선택 (선택사항)</option>' +
            departments.map(d => `<option value="${d.department_id}">${escapeHtml(d.name)}</option>`).join('');
    } catch (e) {
        showToast('폼 데이터 로드 실패: ' + e.message, 'error');
    }
}

/* ===== Load workplaces by category ===== */
async function loadWorkplaces(categoryId) {
    const workplaceSelect = document.getElementById('workplaceId');
    if (!categoryId) {
        workplaceSelect.innerHTML = '<option value="">분류를 먼저 선택하세요</option>';
        workplaces = [];
        return;
    }
    try {
        const res = await api('/visit-requests/workplaces?category_id=' + categoryId);
        workplaces = res.data || [];
        workplaceSelect.innerHTML = '<option value="">선택</option>' +
            workplaces.map(w => `<option value="${w.workplace_id}">${escapeHtml(w.workplace_name)}</option>`).join('');
    } catch (e) {
        showToast('작업장 로드 실패: ' + e.message, 'error');
        workplaceSelect.innerHTML = '<option value="">로드 실패</option>';
    }
}

/* ===== Load my requests ===== */
async function loadMyRequests() {
    try {
        const res = await api('/visit-requests/requests?requester_id=' + currentUser.id);
        myRequests = res.data || [];
        renderMyRequests();
    } catch (e) {
        showToast('신청 목록 로드 실패: ' + e.message, 'error');
    }
}

function renderMyRequests() {
    const tbody = document.getElementById('myRequestsBody');
    if (!myRequests.length) {
        tbody.innerHTML = '<tr><td colspan="9" class="text-center text-gray-400 py-8">신청 내역이 없습니다</td></tr>';
        return;
    }
    tbody.innerHTML = myRequests.map(r => {
        const canDelete = r.status === 'pending';
        const displayName = r.request_type === 'internal'
            ? escapeHtml(r.visitor_name || r.requester_full_name || '-')
            : escapeHtml(r.visitor_company);

        // 체크인/체크아웃 버튼
        let checkBtn = '';
        const canCheckIn = (r.request_type === 'internal' && r.status === 'approved') ||
                           (r.request_type === 'external' && ['approved', 'training_completed'].includes(r.status));
        if (canCheckIn) {
            checkBtn = `<button onclick="doCheckIn(${r.request_id})" class="text-blue-600 hover:text-blue-800 text-xs px-2 py-1 border border-blue-200 rounded hover:bg-blue-50" title="체크인"><i class="fas fa-sign-in-alt"></i></button>`;
        }
        if (r.status === 'checked_in') {
            checkBtn = `<button onclick="doCheckOut(${r.request_id})" class="text-gray-600 hover:text-gray-800 text-xs px-2 py-1 border border-gray-200 rounded hover:bg-gray-50" title="체크아웃"><i class="fas fa-sign-out-alt"></i></button>`;
        }

        return `<tr>
            <td>${requestTypeBadge(r.request_type)}</td>
            <td>${displayName}</td>
            <td class="text-center">${r.visitor_count}</td>
            <td>${escapeHtml(r.workplace_name || '-')}</td>
            <td>${formatDate(r.visit_date)}</td>
            <td class="hide-mobile">${r.visit_time ? String(r.visit_time).substring(0, 5) : '-'}</td>
            <td>${escapeHtml(r.purpose_name || '-')}</td>
            <td>${vrStatusBadge(r.status)}</td>
            <td class="text-right whitespace-nowrap">
                ${checkBtn}
                ${canDelete ? `<button onclick="deleteRequest(${r.request_id})" class="text-gray-400 hover:text-red-500 text-xs ml-1" title="삭제"><i class="fas fa-trash"></i></button>` : ''}
                ${r.status === 'rejected' && r.rejection_reason ? `<button onclick="alert('반려 사유: ' + ${JSON.stringify(r.rejection_reason)})" class="text-gray-400 hover:text-gray-600 text-xs ml-1" title="반려사유"><i class="fas fa-info-circle"></i></button>` : ''}
            </td>
        </tr>`;
    }).join('');
}

/* ===== Check-in / Check-out ===== */
async function doCheckIn(id) {
    if (!confirm('체크인 하시겠습니까?')) return;
    try {
        await api('/visit-requests/requests/' + id + '/check-in', { method: 'PUT', body: JSON.stringify({}) });
        showToast('체크인 완료');
        await loadMyRequests();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

async function doCheckOut(id) {
    if (!confirm('체크아웃 하시겠습니까?')) return;
    try {
        await api('/visit-requests/requests/' + id + '/check-out', { method: 'PUT', body: JSON.stringify({}) });
        showToast('체크아웃 완료');
        await loadMyRequests();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

/* ===== Submit request ===== */
async function submitRequest(e) {
    e.preventDefault();
    const requestType = document.querySelector('input[name="requestType"]:checked')?.value || 'external';
    const isInternal = requestType === 'internal';

    const data = {
        request_type: requestType,
        visitor_company: isInternal ? '내부' : document.getElementById('visitorCompany').value.trim(),
        visitor_name: document.getElementById('visitorName').value.trim() || null,
        visitor_count: isInternal ? 1 : (parseInt(document.getElementById('visitorCount').value) || 1),
        department_id: isInternal ? (parseInt(document.getElementById('departmentId').value) || null) : null,
        category_id: parseInt(document.getElementById('categoryId').value) || null,
        workplace_id: parseInt(document.getElementById('workplaceId').value) || null,
        visit_date: document.getElementById('visitDate').value,
        visit_time: document.getElementById('visitTime').value,
        purpose_id: parseInt(document.getElementById('purposeId').value) || null,
        notes: document.getElementById('notes').value.trim() || null
    };

    if (isInternal) {
        if (!data.visitor_name) { showToast('방문자 이름을 입력해주세요', 'error'); return; }
    } else {
        if (!data.visitor_company) { showToast('업체명을 입력해주세요', 'error'); return; }
    }
    if (!data.category_id) { showToast('작업장 분류를 선택해주세요', 'error'); return; }
    if (!data.workplace_id) { showToast('작업장을 선택해주세요', 'error'); return; }
    if (!data.visit_date) { showToast('방문일을 선택해주세요', 'error'); return; }
    if (!data.visit_time) { showToast('방문시간을 입력해주세요', 'error'); return; }
    if (!data.purpose_id) { showToast('방문 목적을 선택해주세요', 'error'); return; }

    try {
        await api('/visit-requests/requests', { method: 'POST', body: JSON.stringify(data) });
        showToast(isInternal ? '내부 출입 신고가 완료되었습니다' : '출입 신청이 완료되었습니다');
        document.getElementById('visitRequestForm').reset();
        document.getElementById('workplaceId').innerHTML = '<option value="">분류를 먼저 선택하세요</option>';
        document.getElementById('visitorCount').value = '1';
        toggleRequestType();
        await loadMyRequests();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

/* ===== Delete request ===== */
async function deleteRequest(id) {
    if (!confirm('이 신청을 삭제하시겠습니까?')) return;
    try {
        await api('/visit-requests/requests/' + id, { method: 'DELETE' });
        showToast('삭제되었습니다');
        await loadMyRequests();
    } catch (e) {
        showToast(e.message, 'error');
    }
}

/* ===== Init ===== */
function initVisitRequestPage() {
    if (!initAuth()) return;

    // Set default visit date to today
    const today = new Date().toISOString().substring(0, 10);
    document.getElementById('visitDate').value = today;

    // Request type toggle
    document.querySelectorAll('input[name="requestType"]').forEach(r => {
        r.addEventListener('change', toggleRequestType);
    });
    toggleRequestType();

    // Category change -> load workplaces
    document.getElementById('categoryId').addEventListener('change', function() {
        loadWorkplaces(this.value);
    });

    document.getElementById('visitRequestForm').addEventListener('submit', submitRequest);

    loadFormData();
    loadMyRequests();
}