document.addEventListener('DOMContentLoaded', function () {

    // --- Constants ---
    const API_BASE = 'api/';
    const addAssetForm = document.getElementById('addAssetForm');
    const assetsTableBody = document.getElementById('assets-table-body');
    const loadingIndicator = document.getElementById('loading-indicator');
    const notificationToastEl = document.getElementById('notificationToast');
    const notificationToast = new bootstrap.Toast(notificationToastEl);

    // --- Functions ---

    /**
     * Shows a toast notification.
     * @param {string} title - The title of the toast.
     * @param {string} body - The body message of the toast.
     * @param {string} type - 'success' or 'error'.
     */
    function showToast(title, body, type = 'success') {
        const toastHeader = notificationToastEl.querySelector('.toast-header');
        
        // Reset classes
        toastHeader.classList.remove('bg-success', 'text-white', 'bg-danger');

        if (type === 'success') {
            toastHeader.classList.add('bg-success', 'text-white');
        } else if (type === 'error') {
            toastHeader.classList.add('bg-danger', 'text-white');
        }

        document.getElementById('toast-title').textContent = title;
        document.getElementById('toast-body').textContent = body;
        notificationToast.show();
    }

    /**
     * Fetches data from the API.
     * @param {string} endpoint - The API endpoint to fetch from.
     * @returns {Promise<any>} - The JSON response.
     */
    async function fetchApi(endpoint) {
        try {
            const response = await fetch(API_BASE + endpoint);
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            return await response.json();
        } catch (error) {
            console.error(`Error fetching ${endpoint}:`, error);
            showToast('Error', `Gagal memuat data dari server: ${error.message}`, 'error');
            return null;
        }
    }

    /**
     * Populates select dropdowns.
     */
    async function populateSelectOptions() {
        const data = await fetchApi('get_options.php');
        if (!data) return;

        const kategoriSelect = document.getElementById('id_kategori');
        const kantorSelect = document.getElementById('id_kantor_lokasi');

        kategoriSelect.innerHTML = '<option value="">Pilih Kategori...</option>';
        data.kategori.forEach(item => {
            kategoriSelect.innerHTML += `<option value="${item.id}">${item.nama_kategori}</option>`;
        });

        kantorSelect.innerHTML = '<option value="">Pilih Lokasi...</option>';
        data.kantor.forEach(item => {
            kantorSelect.innerHTML += `<option value="${item.id}">${item.nama_kantor}</option>`;
        });
    }

    /**
     * Fetches assets and renders them in the table.
     */
    async function loadAssets() {
        loadingIndicator.style.display = 'block';
        assetsTableBody.innerHTML = '';
        
        const assets = await fetchApi('get_assets.php');
        
        loadingIndicator.style.display = 'none';

        if (assets && assets.length > 0) {
            assets.forEach(asset => {
                const row = `
                    <tr>
                        <td>${asset.kode_aset}</td>
                        <td>${asset.nama_aset}</td>
                        <td>${asset.nama_kategori}</td>
                        <td>${asset.nama_kantor}</td>
                        <td><span class="status-badge status-${asset.status}">${asset.status}</span></td>
                        <td>
                            <button class="btn btn-sm btn-outline-primary" onclick="alert('Fitur Edit belum tersedia.')"><i data-feather="edit-2" class="feather-sm"></i></button>
                            <button class="btn btn-sm btn-outline-danger" onclick="alert('Fitur Hapus belum tersedia.')"><i data-feather="trash-2" class="feather-sm"></i></button>
                        </td>
                    </tr>
                `;
                assetsTableBody.innerHTML += row;
            });
        } else if (assets) {
            assetsTableBody.innerHTML = '<tr><td colspan="6" class="text-center">Belum ada data aset.</td></tr>';
        } else {
            assetsTableBody.innerHTML = '<tr><td colspan="6" class="text-center text-danger">Gagal memuat data aset.</td></tr>';
        }
        feather.replace(); // Re-initialize Feather icons
    }

    /**
     * Handles the submission of the 'Add Asset' form.
     * @param {Event} event - The form submission event.
     */
    async function handleAddAssetSubmit(event) {
        event.preventDefault();
        event.stopPropagation();

        if (!addAssetForm.checkValidity()) {
            addAssetForm.classList.add('was-validated');
            return;
        }
        
        const formData = new FormData(addAssetForm);
        const submitButton = addAssetForm.querySelector('button[type="submit"]');
        submitButton.disabled = true;
        submitButton.innerHTML = '''<span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span> Menyimpan...''';

        try {
            const response = await fetch(API_BASE + 'add_asset.php', {
                method: 'POST',
                body: formData
            });

            const result = await response.json();

            if (result.success) {
                showToast('Sukses', 'Aset baru berhasil ditambahkan.');
                addAssetForm.reset();
                addAssetForm.classList.remove('was-validated');
                bootstrap.Modal.getInstance(document.getElementById('addAssetModal')).hide();
                loadAssets(); // Refresh the table
            } else {
                showToast('Error', result.message || 'Terjadi kesalahan yang tidak diketahui.', 'error');
            }
        } catch (error) {
            console.error('Error submitting form:', error);
            showToast('Error', `Gagal mengirim data: ${error.message}`, 'error');
        } finally {
            submitButton.disabled = false;
            submitButton.innerHTML = 'Simpan Aset';
        }
    }


    // --- Initializations ---

    feather.replace(); // Initial call for icons
    populateSelectOptions();
    loadAssets();

    // --- Event Listeners ---
    addAssetForm.addEventListener('submit', handleAddAssetSubmit);
    
    // Add feather icon class for easier styling
    document.querySelectorAll('i[data-feather]').forEach(el => {
        if(el.classList.contains('feather-sm')) return;
        const iconName = el.getAttribute('data-feather');
        el.classList.add(`icon-${iconName}`);
    });

});