window.viewAndPrintA4Invoice = function(data, autoPrint = true) {
        if (!data) return;
        // Reuse view logic
        const invoiceDisplayNo = data.document_no || data.transaction_no || ((data.type === 'purchase' ? 'PUR-' : 'INV-') + data.id.toString().padStart(5, '0'));
        document.getElementById('invNumber').textContent = invoiceDisplayNo;
        document.getElementById('invDate').textContent = data.invoice_date;
        document.getElementById('invPaymentType').textContent = data.payment_type ? data.payment_type.toUpperCase() : 'CASH';
        document.getElementById('invCustomerName').textContent = data.customer_name || '---';
        
        const phoneEl = document.getElementById('invCustomerPhone');
        const phoneContainer = document.getElementById('invCustomerPhoneContainer');
        if (data.customer_phone) {
            phoneEl.textContent = data.customer_phone;
            phoneContainer.style.display = 'block';
        } else {
            phoneContainer.style.display = 'none';
        }

        const taxIdEl = document.getElementById('invCustomerTaxId');
        const taxIdContainer = document.getElementById('invCustomerTaxIdContainer');
        if (data.customer_tax_id) {
            taxIdEl.textContent = data.customer_tax_id;
            taxIdContainer.style.display = 'block';
        } else {
            taxIdContainer.style.display = 'none';
        }

        document.getElementById('invAmountInWords').textContent = data.total_in_words || '';
        
        const invOutletEl = document.getElementById('invOutletName');
        if (invOutletEl) {
            invOutletEl.textContent = data.outlet_name ? (data.outlet_name) : '';
            invOutletEl.style.display = data.outlet_name ? 'block' : 'none';
        }

        document.getElementById('invPartyLabel').textContent = data.type === 'sale' ? 'Bill To / فاتورة إلى' : 'Bill From / فاتورة من';
        document.getElementById('invPartyLabel').setAttribute('data-en', data.type === 'sale' ? 'Bill To' : 'Bill From');
        document.getElementById('invPartyLabel').setAttribute('data-ar', data.type === 'sale' ? 'فاتورة إلى' : 'فاتورة من');
        document.getElementById('invoiceTypeLabel').textContent = data.type;
        document.getElementById('invoiceTypeLabel').className = 'badge text-uppercase ' + (data.type === 'sale' ? 'bg-success' : 'bg-warning');
        
        const statusLabel = document.getElementById('invoiceStatusLabel');
        let statusClass = 'bg-secondary';
        let statusEn = data.status ? (data.status.charAt(0).toUpperCase() + data.status.slice(1)) : '---';
        if (data.status === 'paid') statusClass = 'bg-success';
        else if (data.status === 'unpaid') statusClass = 'bg-danger';
        else if (data.status === 'partially_paid') {
            statusClass = 'bg-warning text-dark';
            statusEn = 'Partially Paid';
        }
        
        statusLabel.textContent = statusEn;
        statusLabel.className = 'badge text-uppercase ' + statusClass;
        
        const body = document.getElementById('invItemsBody');
        body.innerHTML = '';
        if (data.items) {
            data.items.forEach(item => {
                const tr = document.createElement('tr');
                tr.innerHTML = `
                    <td>${item.name_en} / ${item.name_ar}</td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end"><small><?= __('currency') ?></small> ${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-end">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end"><small><?= __('currency') ?></small> ${parseFloat(item.total_price).toFixed(3)}</td>
                `;
                body.appendChild(tr);
            });
        }
        const vatVal = parseFloat(data.vat_amount || 0);
        const totalVal = parseFloat(data.total_amount || 0);
        const grandTotalValue = (parseFloat(data.total_with_vat) || (totalVal + vatVal));

        if (document.getElementById('invSubtotal')) document.getElementById('invSubtotal').innerHTML = '<small><?= __('currency') ?></small> ' + (grandTotalValue - vatVal).toFixed(3);
        if (document.getElementById('invVatAmount')) document.getElementById('invVatAmount').innerHTML = '<small><?= __('currency') ?></small> ' + vatVal.toFixed(2);
        if (document.getElementById('invGrandTotal')) document.getElementById('invGrandTotal').innerHTML = '<small><?= __('currency') ?></small> ' + grandTotalValue.toFixed(3);

        if (document.getElementById('invPaidInfo')) document.getElementById('invPaidInfo').innerHTML = '<small><?= __('currency') ?></small> ' + parseFloat(data.paid_amount || 0).toFixed(3);
        const balance = grandTotalValue - parseFloat(data.paid_amount || 0);
        if (document.getElementById('invBalanceInfo')) document.getElementById('invBalanceInfo').innerHTML = '<small><?= __('currency') ?></small> ' + balance.toFixed(3);

        // Generate QR Code for Zakat, Tax and Customs Authority (ZATCA) style or simple formal
        const companyName = <?= json_encode($data['settings']['company_name'] ?? 'Accounting System') ?>;
        const vatNo = <?= json_encode($data['settings']['vat_number'] ?? '') ?>;
        const qrData = `Seller: ${companyName}\nVAT: ${vatNo}\nInvoice: ${invoiceDisplayNo}\nDate: ${data.invoice_date}\nTotal: ${grandTotalValue.toFixed(3)}`;
        const qrUrl = `https://api.qrserver.com/v1/create-qr-code/?size=100x100&data=${encodeURIComponent(qrData)}`;
        if (document.getElementById('invQrCode')) {
            document.getElementById('invQrCode').innerHTML = `<img src="${qrUrl}" alt="QR Code" style="width: 100px; height: 100px;" class="border p-1 bg-white">`;
        }
        
        const viewModal = bootstrap.Modal.getOrCreateInstance(document.getElementById('viewInvoiceModal'));
        viewModal.show();
        
        if (autoPrint) {
            setTimeout(() => { window.print(); }, 1000);
        }

        fetch(`index.php?action=get_payments&invoice_id=${data.id}`)
            .then(res => res.json())
            .then(payments => {
                const paymentsBody = document.getElementById('invPaymentsBody');
                const paymentsSection = document.getElementById('invPaymentsSection');
                if (paymentsBody) paymentsBody.innerHTML = '';
                if (payments && payments.length > 0) {
                    if (paymentsBody) {
                        payments.forEach(p => {
                            const tr = document.createElement('tr');
                            tr.innerHTML = `<td>${p.payment_date}</td><td>${p.payment_method}</td><td class="text-end fw-bold">OMR ${parseFloat(p.amount).toFixed(3)}</td>`;
                            paymentsBody.appendChild(tr);
                        });
                    }
                    if (paymentsSection) paymentsSection.style.display = 'block';
                } else {
                    if (paymentsSection) paymentsSection.style.display = 'none';
                }
            }).catch(err => console.error('Error fetching payments:', err));
    };

    <?php
    $autoInvoicePayload = null;
    if (
        isset($_SESSION['trigger_invoice_modal'], $_SESSION['show_invoice_id'], $_SESSION['show_invoice_page']) &&
        in_array($page, ['sales', 'purchases'], true) &&
        $_SESSION['show_invoice_page'] === $page
    ) {
        $autoInvoiceId = (int)$_SESSION['show_invoice_id'];
        $autoInvoiceType = $page === 'purchases' ? 'purchase' : 'sale';
        unset($_SESSION['trigger_invoice_modal'], $_SESSION['show_invoice_id'], $_SESSION['show_invoice_page']);

        try {
            $autoTable = $autoInvoiceType === 'purchase' ? 'purchases' : 'invoices';
            $autoPartyTable = $autoInvoiceType === 'purchase' ? 'suppliers' : 'customers';
            $autoPartyCol = $autoInvoiceType === 'purchase' ? 'supplier_id' : 'customer_id';
            $autoTaxColumn = entity_tax_column($autoPartyTable);
            $autoTaxSelect = $autoTaxColumn !== null ? "c.$autoTaxColumn AS customer_tax_id" : "'' AS customer_tax_id";
            $autoOutletSelect = "'' AS outlet_name";
            $autoOutletJoin = '';

            if (db_column_exists($autoTable, 'outlet_id') && db_table_exists('outlets')) {
                $autoOutletSelect = 'o.name AS outlet_name';
                $autoOutletJoin = 'LEFT JOIN outlets o ON doc.outlet_id = o.id';
            }

            $autoStmt = db()->prepare("SELECT doc.*, c.name AS customer_name, c.phone AS customer_phone, $autoTaxSelect, $autoOutletSelect
                                       FROM $autoTable doc
                                       LEFT JOIN $autoPartyTable c ON doc.$autoPartyCol = c.id
                                       $autoOutletJoin
                                       WHERE doc.id = ?
                                       LIMIT 1");
            $autoStmt->execute([$autoInvoiceId]);
            $autoInvoicePayload = $autoStmt->fetch(PDO::FETCH_ASSOC);

            if ($autoInvoicePayload) {
                $autoItemSql = $autoInvoiceType === 'purchase'
                    ? "SELECT pi.*, i.name_en, i.name_ar, i.vat_rate FROM purchase_items pi LEFT JOIN stock_items i ON pi.item_id = i.id WHERE pi.purchase_id = ?"
                    : "SELECT ii.*, i.name_en, i.name_ar, i.vat_rate FROM invoice_items ii LEFT JOIN stock_items i ON ii.item_id = i.id WHERE ii.invoice_id = ?";
                $autoItemsStmt = db()->prepare($autoItemSql);
                $autoItemsStmt->execute([$autoInvoiceId]);
                $autoInvoicePayload['items'] = $autoItemsStmt->fetchAll(PDO::FETCH_ASSOC);
                $autoInvoicePayload['type'] = $autoInvoiceType;
                $autoInvoicePayload['total_with_vat'] = (float)($autoInvoicePayload['total_with_vat'] ?? (($autoInvoicePayload['total_amount'] ?? 0) + ($autoInvoicePayload['vat_amount'] ?? 0)));
                $autoInvoicePayload['paid_amount'] = (float)($autoInvoicePayload['paid_amount'] ?? 0);
                $autoInvoicePayload['total_in_words'] = numberToWordsOMR($autoInvoicePayload['total_with_vat']);
                $autoTransactionNo = trim((string)($autoInvoicePayload['transaction_no'] ?? ''));
                $autoPrefix = $autoInvoiceType === 'purchase' ? 'PUR' : 'INV';
                $autoInvoicePayload['document_no'] = ($autoInvoiceType === 'sale' && $autoTransactionNo !== '')
                    ? $autoTransactionNo
                    : $autoPrefix . '-' . str_pad((string)$autoInvoicePayload['id'], 5, '0', STR_PAD_LEFT);
            }
        } catch (Throwable $e) {
            $autoInvoicePayload = null;
        }
    }
    ?>
    <?php if (!empty($autoInvoicePayload)): ?>
    setTimeout(() => {
        if (window.viewAndPrintA4Invoice) {
            window.viewAndPrintA4Invoice(<?= json_encode($autoInvoicePayload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES) ?>, true);
        }
    }, 300);
    <?php endif; ?>