document.addEventListener('DOMContentLoaded', function() {
    console.log("DOM Content Loaded - Accounting System");
    try {
        // Initialize Select2 for all searchable dropdowns
        $('.select2').each(function() {
            $(this).select2({
                width: '100%',
                dropdownParent: $(this).closest('.modal').length ? $(this).closest('.modal') : $(document.body)
            });
        });

        const hasExpiryToggle = document.getElementById('hasExpiryToggle');
    const expiryDateContainer = document.getElementById('expiryDateContainer');
    const suggestSkuBtn = document.getElementById('suggestSkuBtn');
    const skuInput = document.getElementById('skuInput');

    if (suggestSkuBtn && skuInput) {
        suggestSkuBtn.addEventListener('click', function() {
            const sku = Math.floor(100000000000 + Math.random() * 900000000000).toString();
            skuInput.value = sku;
        });

        skuInput.addEventListener('keydown', function(e) {
            if (e.key === 'Enter') {
                e.preventDefault();
                console.log("Barcode scan detected in SKU field, preventing form submission");
            }
        });
    }

    // Toggle Expiry Date visibility
    if (hasExpiryToggle && expiryDateContainer) {
        hasExpiryToggle.addEventListener('change', function() {
            expiryDateContainer.style.display = this.checked ? 'block' : 'none';
        });
    }

    const isPromotionToggle = document.getElementById('isPromotionToggle');
    const promotionFieldsContainer = document.getElementById('promotionFieldsContainer');
    if (isPromotionToggle && promotionFieldsContainer) {
        isPromotionToggle.addEventListener('change', function() {
            promotionFieldsContainer.style.display = this.checked ? 'flex' : 'none';
        });
    }

    // Translation Logic
    document.querySelectorAll('.btn-translate').forEach(btn => {
        btn.addEventListener('click', function() {
            const sourceId = this.getAttribute('data-source');
            const targetId = this.getAttribute('data-target');
            const targetLang = this.getAttribute('data-to');
            const sourceText = document.getElementById(sourceId).value;

            if (!sourceText) {
                alert(targetLang === 'ar' ? 'يرجى إدخال النص أولاً' : 'Please enter text first');
                return;
            }

            const originalHtml = this.innerHTML;
            this.disabled = true;
            this.innerHTML = '<span class="spinner-border spinner-border-sm"></span>';

            const formData = new FormData();
            formData.append('action', 'translate');
            formData.append('text', sourceText);
            formData.append('target', targetLang);

            fetch('index.php', {
                method: 'POST',
                body: formData
            })
            .then(res => res.json())
            .then(data => {
                if (data.success) {
                    document.getElementById(targetId).value = data.translated;
                } else {
                    alert('Translation error: ' + (data.error || 'Unknown error'));
                }
            })
            .catch(err => {
                console.error(err);
                alert('Connection error');
            })
            .finally(() => {
                this.disabled = false;
                this.innerHTML = originalHtml;
            });
        });
    });

    document.querySelectorAll('.isPromotionToggleEdit').forEach(toggle => {
        toggle.addEventListener('change', function() {
            const id = this.getAttribute('data-id');
            const container = document.getElementById('promotionFieldsContainerEdit' + id);
            if (container) {
                container.style.display = this.checked ? 'flex' : 'none';
            }
        });
    });

    // Handle Expiry toggle in Edit Modals
    document.querySelectorAll('.hasExpiryToggleEdit').forEach(toggle => {
        toggle.addEventListener('change', function() {
            const container = this.closest('.row').querySelector('.expiryDateContainerEdit');
            if (container) {
                container.style.display = this.checked ? 'block' : 'none';
                if (!this.checked) {
                    container.querySelector('input').value = '';
                }
            }
        });
    });

        // LPO Form Logic
    initInvoiceForm('lpoProductSearchInput', 'lpoSearchSuggestions', 'lpoItemsTableBody', 'lpo_grand_display', 'lpo_subtotal_display', 'lpo_vat_display');
    initInvoiceForm('editLpoProductSearchInput', 'editLpoSearchSuggestions', 'editLpoItemsTableBody', 'edit_lpo_grand_display', 'edit_lpo_subtotal_display', 'edit_lpo_vat_display');

    document.querySelectorAll('.edit-lpo-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            document.getElementById('edit_lpo_id').value = data.id;
            const supplierSelect = document.getElementById('edit_lpo_supplier_id');
            supplierSelect.value = data.supplier_id;
            if (window.jQuery && $(supplierSelect).data('select2')) {
                $(supplierSelect).trigger('change');
            }
            document.getElementById('edit_lpo_date').value = data.lpo_date;
            document.getElementById('edit_lpo_delivery_date').value = data.delivery_date || '';
            document.getElementById('edit_lpo_status').value = data.status || 'pending';
            document.getElementById('edit_lpo_terms').value = data.terms_conditions || '';
            
            const tableBody = document.getElementById('editLpoItemsTableBody');
            tableBody.innerHTML = '';
            
            data.items.forEach(item => {
                addItemToTable({
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '',
                    vat_rate: item.vat_rate || 0
                }, tableBody, null, null, 
                document.getElementById('edit_lpo_grand_display'), 
                document.getElementById('edit_lpo_subtotal_display'), 
                document.getElementById('edit_lpo_vat_display'),
                { quantity: item.quantity, unit_price: item.unit_price });
            });
        });
    });

    document.querySelectorAll('.view-lpo-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            window.viewAndPrintLPO(data);
        });
    });

    window.viewAndPrintLPO = function(data) {
        const modal = new bootstrap.Modal(document.getElementById('viewLpoModal'));
        const content = document.getElementById('lpoDetailsContent');
        
        const logoUrl = companySettings.company_logo || '';
        const companyHeader = `
            <div class="row align-items-center mb-4">
                <div class="col-6">
                    ${logoUrl ? `<img src="${logoUrl}" alt="Logo" style="max-height: 80px;" class="mb-3">` : ''}
                    <h4 class="fw-bold mb-0">${companySettings.company_name || 'Your Company'}</h4>
                    <p class="text-muted mb-0 small">
                        ${companySettings.company_address || ''}<br>
                        Phone: ${companySettings.company_phone || ''} | Email: ${companySettings.company_email || ''}
                        ${companySettings.tax_number ? `<br>TRN: ${companySettings.tax_number}` : ''}
                    </p>
                </div>
                <div class="col-6 text-end">
                    <h2 class="text-primary fw-bold mb-1">LOCAL PURCHASE ORDER</h2>
                    <p class="h5 mb-0 text-muted">LPO-${data.id.toString().padStart(5, '0')}</p>
                </div>
            </div>
        `;

        let itemsHtml = '';
        data.items.forEach((item, index) => {
            itemsHtml += `
                <tr>
                    <td>${index + 1}</td>
                    <td>${item.name_en}<br><small class="text-muted">${item.name_ar}</small></td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-center">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end">${parseFloat(item.total_amount).toFixed(3)}</td>
                </tr>
            `;
        });

        content.innerHTML = `
            ${companyHeader}
            <hr>
            <div class="row mb-4">
                <div class="col-6">
                    <h6 class="text-uppercase text-muted fw-bold mb-3" data-en="Supplier" data-ar="المورد">Supplier</h6>
                    <p class="h6 mb-1 fw-bold">${data.supplier_name}</p>
                    <p class="small text-muted mb-0">
                        ${data.supplier_phone ? `Phone: ${data.supplier_phone}` : ''}
                    </p>
                </div>
                <div class="col-6 text-end">
                    <h6 class="text-uppercase text-muted fw-bold mb-3" data-en="Details" data-ar="تفاصيل">Details</h6>
                    <div class="d-flex justify-content-end mb-1">
                        <span class="text-muted me-2">Date:</span>
                        <span class="fw-bold">${data.lpo_date}</span>
                    </div>
                    <div class="d-flex justify-content-end mb-1">
                        <span class="text-muted me-2">Delivery:</span>
                        <span class="fw-bold">${data.delivery_date || '---'}</span>
                    </div>
                    <div class="d-flex justify-content-end">
                        <span class="text-muted me-2">Status:</span>
                        <span class="badge ${data.status === 'pending' ? 'bg-warning text-dark' : 'bg-success'}">${data.status.toUpperCase()}</span>
                    </div>
                </div>
            </div>
            <div class="table-responsive">
                <table class="table table-striped table-bordered">
                    <thead class="table-dark">
                        <tr>
                            <th style="width: 5%">#</th>
                            <th style="width: 45%" data-en="Description" data-ar="الوصف">Description</th>
                            <th style="width: 10%" class="text-center" data-en="Qty" data-ar="الكمية">Qty</th>
                            <th style="width: 15%" class="text-end">Unit Price</th>
                            <th style="width: 10%" class="text-center">VAT</th>
                            <th style="width: 15%" class="text-end" data-en="Total" data-ar="الإجمالي">Total</th>
                        </tr>
                    </thead>
                    <tbody>${itemsHtml}</tbody>
                    <tfoot class="table-light">
                        <tr>
                            <td colspan="5" class="text-end fw-bold" data-en="Subtotal" data-ar="الإجمالي الفرعي">Subtotal</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(data.total_amount).toFixed(3)}</td>
                        </tr>
                        <tr>
                            <td colspan="5" class="text-end fw-bold">VAT Amount</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(data.vat_amount).toFixed(2)}</td>
                        </tr>
                        <tr class="table-primary">
                            <td colspan="5" class="text-end fw-bold h5">Grand Total</td>
                            <td class="text-end fw-bold h5">OMR ${parseFloat(data.total_with_vat).toFixed(3)}</td>
                        </tr>
                    </tfoot>
                </table>
            </div>
            ${data.terms_conditions ? `
            <div class="card bg-light border-0 mt-4">
                <div class="card-body p-3">
                    <h6 class="fw-bold mb-2 small text-uppercase text-muted">Terms & Conditions</h6>
                    <p class="small mb-0">${data.terms_conditions.replace(/\n/g, '<br>')}</p>
                </div>
            </div>` : ''}
            
            <div class="row mt-5 pt-3">
                <div class="col-4 text-center">
                    <div style="border-top: 1px solid #dee2e6; padding-top: 10px;">
                        <p class="small mb-0">Prepared By</p>
                    </div>
                </div>
                <div class="col-4"></div>
                <div class="col-4 text-center">
                    <div style="border-top: 1px solid #dee2e6; padding-top: 10px;">
                        <p class="small mb-0">Authorized Signature</p>
                    </div>
                </div>
            </div>
        `;
        
        window.printLPO = function() {
            const printWindow = window.open('', '_blank');
            printWindow.document.write('<html><head><title>LPO-' + data.id + '</title>');
            printWindow.document.write('<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.rtl.min.css" rel="stylesheet">');
            printWindow.document.write('<style>body { padding: 40px; } @media print { .no-print { display: none; } }</style>');
            printWindow.document.write('</head><body>');
            printWindow.document.write(content.innerHTML);
            printWindow.document.write('</body></html>');
            printWindow.document.close();
            setTimeout(() => {
                printWindow.print();
                printWindow.close();
            }, 500);
        };
        
        modal.show();
    };

    // Quotation Form Logic
    initInvoiceForm('quotProductSearchInput', 'quotSearchSuggestions', 'quotItemsTableBody', 'quot_grand_display', 'quot_subtotal_display', 'quot_vat_display');
    initInvoiceForm('editQuotProductSearchInput', 'editQuotSearchSuggestions', 'editQuotItemsTableBody', 'edit_quot_grand_display', 'edit_quot_subtotal_display', 'edit_quot_vat_display');

    document.querySelectorAll('.edit-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            document.getElementById('edit_quotation_id').value = data.id;
            document.getElementById('edit_quot_customer_id').value = data.customer_id;
            document.getElementById('edit_quot_date').value = data.quotation_date;
            document.getElementById('edit_quot_valid').value = data.valid_until || '';
            document.getElementById('edit_quot_status').value = data.status || 'pending';
            
            const tableBody = document.getElementById('editQuotItemsTableBody');
            tableBody.innerHTML = '';
            
            data.items.forEach(item => {
                addItemToTable({
                    id: item.item_id,
                    name_en: item.name_en,
                    name_ar: item.name_ar,
                    sku: '',
                    vat_rate: item.vat_rate || 0
                }, tableBody, null, null, 
                document.getElementById('edit_quot_grand_display'), 
                document.getElementById('edit_quot_subtotal_display'), 
                document.getElementById('edit_quot_vat_display'),
                { quantity: item.quantity, unit_price: item.unit_price });
            });
        });
    });

    document.querySelectorAll('.convert-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            if (confirm('Convert this quotation to an invoice? This will reduce stock.')) {
                const f = document.createElement('form');
                f.method = 'POST';
                f.innerHTML = `<input type="hidden" name="convert_to_invoice" value="1"><input type="hidden" name="quotation_id" value="${this.dataset.id}">`;
                document.body.appendChild(f);
                f.submit();
            }
        });
    });

    // View Quotation Logic
    window.viewAndPrintQuotation = function(data, autoPrint = false) {
        const modal = new bootstrap.Modal(document.getElementById('viewQuotationModal'));
        const content = document.getElementById('quotationPrintableArea');
        
        let itemsHtml = '';
        data.items.forEach((item, index) => {
            itemsHtml += `
                <tr>
                    <td>${index + 1}</td>
                    <td>${item.name_en}<br><small>${item.name_ar}</small></td>
                    <td class="text-center">${item.quantity}</td>
                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
                    <td class="text-center">${parseFloat(item.vat_rate || 0).toFixed(2)}%</td>
                    <td class="text-end">${parseFloat(item.total_price).toFixed(3)}</td>
                </tr>
            `;
        });

        // Company Logo and Header Construction
        const logoUrl = companySettings.company_logo || '';
        const logoImg = logoUrl ? `<img src="${logoUrl}" alt="Logo" class="invoice-logo mb-3">` : '';
        const companyName = companySettings.company_name || 'Accounting System';
        const companyAddress = (companySettings.company_address || '').replace(/\n/g, '<br>');
        const companyVat = companySettings.vat_number ? `<p class="text-muted small mb-0">VAT: ${companySettings.vat_number}</p>` : '';
        const companyPhone = companySettings.company_phone ? `<p class="text-muted small mb-0">Tel: ${companySettings.company_phone}</p>` : '';

        // Quotation Header Construction
        const quotDate = data.quotation_date;
        const quotValid = data.valid_until || 'N/A';
        const quotNo = 'QUO-' + data.id.toString().padStart(5, '0');
        const customerName = data.customer_name || 'Walk-in Customer';
        const statusBadge = `<span class="badge ${data.status === 'converted' ? 'bg-success' : 'bg-secondary'}">${data.status.toUpperCase()}</span>`;

        content.innerHTML = `
            <div class="p-5">
                <div class="invoice-header mb-4">
                    <div class="row align-items-center">
                        <div class="col-6">
                            ${logoImg}
                            <h3 class="mb-1 fw-bold">${companyName}</h3>
                            <p class="text-muted small mb-0">${companyAddress}</p>
                            ${companyVat}
                            ${companyPhone}
                        </div>
                        <div class="col-6 text-end">
                            <h1 class="invoice-title fw-bold mb-0 text-uppercase">Quotation / عرض سعر</h1>
                            <div class="mt-2">${statusBadge}</div>
                            <div class="mt-3">
                                <p class="mb-0 fs-5">No / رقم: <strong class="text-primary">${quotNo}</strong></p>
                                <p class="mb-0">Date / التاريخ: <span class="fw-bold">${quotDate}</span></p>
                                <p class="mb-0">Valid Until / صالح لغاية: <span class="fw-bold">${quotValid}</span></p>
                            </div>
                        </div>
                    </div>
                </div>

                <div class="row mb-4 g-3">
                    <div class="col-6">
                        <div class="invoice-info-card">
                            <p class="text-muted small text-uppercase fw-bold mb-2 border-bottom pb-1">To / إلى</p>
                            <h5 class="mb-1 fw-bold">${customerName}</h5>
                        </div>
                    </div>
                </div>

                <table class="table table-bordered table-formal">
                    <thead class="bg-dark text-white">
                        <tr>
                            <th>#</th>
                            <th>Item Description / وصف الصنف</th>
                            <th class="text-center">Qty / الكمية</th>
                            <th class="text-end">Unit Price / سعر الوحدة</th>
                            <th class="text-center">VAT / الضريبة</th>
                            <th class="text-end">Total / الإجمالي</th>
                        </tr>
                    </thead>
                    <tbody>${itemsHtml}</tbody>
                    <tfoot>
                        <tr>
                            <th colspan="5" class="text-end">Subtotal / المجموع الفرعي</th>
                            <td class="text-end fw-bold">${parseFloat(data.total_amount).toFixed(3)}</td>
                        </tr>
                        <tr>
                            <th colspan="5" class="text-end">VAT Amount / مبلغ الضريبة</th>
                            <td class="text-end fw-bold">${parseFloat(data.vat_amount).toFixed(2)}</td>
                        </tr>
                        <tr class="table-primary">
                            <th colspan="5" class="text-end h5">Grand Total (OMR) / المجموع الكلي (رع)</th>
                            <td class="text-end h5 fw-bold">${parseFloat(data.total_with_vat).toFixed(3)}</td>
                        </tr>
                    </tfoot>
                </table>
                
                <div class="mt-5 pt-3 border-top">
                    <div class="row">
                        <div class="col-6">
                            <p class="small text-muted text-uppercase fw-bold">Terms & Conditions / الشروط والأحكام:</p>
                            <ul class="small text-muted">
                                <li>Quotation is valid until the date mentioned above. / عرض السعر صالح لغاية التاريخ المذكور أعلاه.</li>
                                <li>Prices are inclusive of VAT where applicable. / الأسعار تشمل ضريبة القيمة المضافة حيثما ينطبق ذلك.</li>
                            </ul>
                        </div>
                        <div class="col-6 text-end pt-4">
                            <div class="border-top d-inline-block px-5">Authorized Signature / التوقيع المعتمد</div>
                        </div>
                    </div>
                </div>
                <div class="mt-4 text-center">
                    <p class="text-muted x-small mb-0">Generated by / تم إنشاؤه بواسطة ${companyName}</p>
                </div>
            </div>
        `;
        
        const actionButtons = document.getElementById('quotationActionButtons');
        actionButtons.innerHTML = '';
        if (data.status === 'pending') {
            const convertBtn = document.createElement('button');
            convertBtn.className = 'btn btn-success me-2';
            convertBtn.innerHTML = '<i class="bi bi-receipt"></i> <span data-en="Convert to Invoice" data-ar="تحويل إلى فاتورة">Convert to Invoice</span>';
            convertBtn.onclick = function() {
                if (confirm('Convert this quotation to an invoice?')) {
                    const f = document.createElement('form');
                    f.method = 'POST';
                    f.innerHTML = `<input type="hidden" name="convert_to_invoice" value="1"><input type="hidden" name="quotation_id" value="${data.id}">`;
                    document.body.appendChild(f);
                    f.submit();
                }
            };
            actionButtons.appendChild(convertBtn);
            
            const editBtn = document.createElement('button');
            editBtn.className = 'btn btn-primary';
            editBtn.innerHTML = '<i class="bi bi-pencil-square"></i> <span data-en="Edit" data-ar="تعديل">Edit</span>';
            editBtn.onclick = function() {
                const editModal = new bootstrap.Modal(document.getElementById('editQuotationModal'));
                modal.hide();
                const originalEditBtn = document.querySelector(`.edit-quotation-btn[data-json*='"id":${data.id},']`) || 
                                       document.querySelector(`.edit-quotation-btn[data-json*='"id":${data.id}']`);
                if (originalEditBtn) originalEditBtn.click();
            };
            actionButtons.appendChild(editBtn);
        }
        
        modal.show();
        if (autoPrint) {
            setTimeout(() => { window.print(); }, 500);
        }
    };

    document.querySelectorAll('.view-quotation-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const data = JSON.parse(this.dataset.json);
            window.viewAndPrintQuotation(data, false);
        });
    });


            // Status change logic for Paid Amount field
    const togglePaidAmount = (statusId, containerId) => {
        const statusEl = document.getElementById(statusId);
        const containerEl = document.getElementById(containerId);
        if (statusEl && containerEl) {
            statusEl.addEventListener('change', function() {
                if (this.value === 'partially_paid') {
                    containerEl.style.display = 'block';
                } else {
                    containerEl.style.display = 'none';
                }
            });
        }
    };
    togglePaidAmount('add_status', 'addPaidAmountContainer');
    togglePaidAmount('edit_status', 'editPaidAmountContainer');

    // Pay Invoice Logic
    document.querySelectorAll('.pay-invoice-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const id = this.getAttribute('data-id');
            const total = parseFloat(this.getAttribute('data-total'));
            const paid = parseFloat(this.getAttribute('data-paid') || 0);
            const remaining = total - paid;

            document.getElementById('pay_invoice_id').value = id;
            document.getElementById('pay_invoice_total').value = total.toFixed(3);
            document.getElementById('pay_remaining_amount').value = remaining.toFixed(3);
            document.getElementById('pay_amount').value = remaining.toFixed(3);
            document.getElementById('pay_amount').max = remaining.toFixed(3);
        });
    });

    // Show receipt modal if needed
    
    function showReceipt(paymentId) {
        fetch(`index.php?action=get_payment_details&payment_id=${paymentId}`)
            .then(res => res.json())
            .then(data => {
                if (!data) return;
                document.getElementById('receiptNo').textContent = 'RCP-' + data.id.toString().padStart(5, '0');
                document.getElementById('receiptDate').textContent = data.payment_date;
                document.getElementById('receiptCustomer').textContent = data.customer_name || '---';
                document.getElementById('receiptInvNo').textContent = (data.inv_type === 'purchase' ? 'PUR-' : 'INV-') + data.inv_id.toString().padStart(5, '0');
                document.getElementById('receiptMethod').textContent = data.payment_method;
                document.getElementById('receiptAmount').textContent = parseFloat(data.amount).toFixed(3);
                document.getElementById('receiptAmountWords').textContent = data.amount_words;
                
                const outletEl = document.getElementById('receiptOutletName');
                if (outletEl) {
                    outletEl.textContent = data.outlet_name ? (data.outlet_name) : '';
                    outletEl.style.display = data.outlet_name ? 'block' : 'none';
                }

                // Update labels for Purchase vs Sale
                const partyLabel = document.getElementById('receiptPartyLabel');
                const againstLabel = document.getElementById('receiptAgainstLabel');
                const receiptTitle = document.querySelector('#receiptModal .modal-title');
                const receiptH4 = document.querySelector('.receipt-container h4.letter-spacing-2');

                if (data.inv_type === 'purchase') {
                    partyLabel.textContent = 'Paid To';
                    partyLabel.setAttribute('data-en', 'Paid To');
                    partyLabel.setAttribute('data-ar', 'صرف إلى');
                    
                    againstLabel.textContent = 'Against Purchase';
                    againstLabel.setAttribute('data-en', 'Against Purchase');
                    againstLabel.setAttribute('data-ar', 'مقابل شراء');

                    receiptTitle.textContent = 'Payment Voucher';
                    receiptTitle.setAttribute('data-en', 'Payment Voucher');
                    receiptTitle.setAttribute('data-ar', 'سند صرف');

                    receiptH4.textContent = 'PAYMENT VOUCHER';
                    receiptH4.setAttribute('data-en', 'PAYMENT VOUCHER');
                    receiptH4.setAttribute('data-ar', 'سند صرف');
                } else {
                    partyLabel.textContent = 'Received From';
                    partyLabel.setAttribute('data-en', 'Received From');
                    partyLabel.setAttribute('data-ar', 'وصلنا من');

                    againstLabel.textContent = 'Against Invoice';
                    againstLabel.setAttribute('data-en', 'Against Invoice');
                    againstLabel.setAttribute('data-ar', 'مقابل فاتورة');

                    receiptTitle.textContent = 'Payment Receipt';
                    receiptTitle.setAttribute('data-en', 'Payment Receipt');
                    receiptTitle.setAttribute('data-ar', 'سند قبض');

                    receiptH4.textContent = 'PAYMENT RECEIPT';
                    receiptH4.setAttribute('data-en', 'PAYMENT RECEIPT');
                    receiptH4.setAttribute('data-ar', 'سند قبض');
                }
                
                const notesContainer = document.getElementById('receiptNotesContainer');
                if (data.notes) {
                    document.getElementById('receiptNotes').textContent = data.notes;
                    notesContainer.style.display = 'block';
                } else {
                    notesContainer.style.display = 'none';
                }
                
                const receiptModal = new bootstrap.Modal(document.getElementById('receiptModal'));
                receiptModal.show();
            });
    };

    document.querySelectorAll('.view-payments-btn').forEach(btn => {
        btn.addEventListener('click', function() {
            const invoiceId = this.getAttribute('data-id');
            const tbody = document.getElementById('paymentsTableBody');
            tbody.innerHTML = '<tr><td colspan="5" class="text-center" data-en="Loading..." data-ar="جاري التحميل...">Loading...</td></tr>';
            
            fetch(`index.php?action=get_payments&invoice_id=${invoiceId}`)
                .then(res => res.json())
                .then(data => {
                    tbody.innerHTML = '';
                    if (data.length === 0) {
                        tbody.innerHTML = '<tr><td colspan="5" class="text-center" data-en="No payments found." data-ar="لا توجد مدفوعات.">No payments found.</td></tr>';
                        return;
                    }
                    data.forEach(p => {
                        const tr = document.createElement('tr');
                        tr.innerHTML = `
                            <td>RCP-${p.id.toString().padStart(5, '0')}</td>
                            <td>${p.payment_date}</td>
                            <td>${p.payment_method}</td>
                            <td class="text-end fw-bold">OMR ${parseFloat(p.amount).toFixed(3)}</td>
                            <td class="text-end">
                                <button class="btn btn-sm btn-outline-primary" onclick="showReceipt(${p.id})">
                                    <i class="bi bi-printer"></i>
                                </button>
                            </td>
                        `;
                        tbody.appendChild(tr);
                    });
                });
        });
    });

    window.printReceipt = function() {
        const content = document.getElementById('printableReceipt').innerHTML;
        const originalContent = document.body.innerHTML;
        document.body.innerHTML = content;
        window.print();
        document.body.innerHTML = originalContent;
        window.location.reload();
    };
    // Invoice Form Logic
    const initInvoiceForm = (searchInputId, suggestionsId, tableBodyId, grandTotalId, subtotalId, totalVatId) => {
        const searchInput = document.getElementById(searchInputId);
        const suggestions = document.getElementById(suggestionsId);
        const tableBody = document.getElementById(tableBodyId);
        const grandTotalEl = document.getElementById(grandTotalId);
        const subtotalEl = document.getElementById(subtotalId);
        const totalVatEl = document.getElementById(totalVatId);

        if (!searchInput || !tableBody) return;

        let timeout = null;
        searchInput.addEventListener('input', function() {
            clearTimeout(timeout);
            const q = this.value.trim();
            if (q.length < 2) {
                suggestions.style.display = 'none';
                return;
            }

            timeout = setTimeout(() => {
                fetch(`index.php?action=search_items&q=${encodeURIComponent(q)}`)
                    .then(res => res.ok ? res.json() : [])
                    .then(data => {
                        suggestions.innerHTML = '';
                        if (data.length > 0) {
                            data.forEach(item => {
                                const btn = document.createElement('button');
                                btn.type = 'button';
                                btn.className = 'list-group-item list-group-item-action';
                                btn.innerHTML = `
                                    <div class="d-flex justify-content-between">
                                        <span><strong>${item.sku}</strong> - ${item.name_en} / ${item.name_ar}</span>
                                        <span class="text-muted small">Stock: ${item.stock_quantity}</span>
                                    </div>
                                `;
                                btn.onclick = () => addItemToTable(item, tableBody, searchInput, suggestions, grandTotalEl, subtotalEl, totalVatEl);
                                suggestions.appendChild(btn);
                            });
                            suggestions.style.display = 'block';
                        } else {
                            suggestions.style.display = 'none';
                        }
                    });
            }, 300);
        });

        // Close suggestions when clicking outside
        document.addEventListener('click', function(e) {
            if (!searchInput.contains(e.target) && !suggestions.contains(e.target)) {
                suggestions.style.display = 'none';
            }
        });
    };

    function addItemToTable(item, tableBody, searchInput, suggestions, grandTotalEl, subtotalEl, totalVatEl, customData = null) {
        if (suggestions) suggestions.style.display = 'none';
        if (searchInput) searchInput.value = '';

        const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
        const currentStock = parseFloat(item.stock_quantity) || 0;

        if (invoiceType === 'sale' && !allowZeroStock && !customData) {
            const existingInTable = Array.from(tableBody.querySelectorAll('.item-row')).find(row => row.querySelector('.item-id-input').value == item.id);
            let currentQtyInTable = 0;
            if (existingInTable) {
                currentQtyInTable = parseFloat(existingInTable.querySelector('.item-qty').value) || 0;
            }
            
            if (currentQtyInTable + 1 > currentStock) {
                alert('Insufficient stock! Available: ' + currentStock);
                return;
            }
        }
        
        const existingRow = Array.from(tableBody.querySelectorAll('.item-id-input')).find(input => input.value == item.id);
        if (existingRow && !customData) {
            const row = existingRow.closest('tr');
            const qtyInput = row.querySelector('.item-qty');
            qtyInput.value = parseFloat(qtyInput.value) + 1;
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
            return;
        }

        const row = document.createElement('tr');
        row.className = 'item-row';
        const price = customData ? customData.unit_price : (invoiceType === 'sale' ? item.sale_price : item.purchase_price);
        const qty = customData ? customData.quantity : 1;
        const vatRate = item.vat_rate || 0;
        
        row.innerHTML = `
            <td>
                <input type="hidden" name="item_ids[]" class="item-id-input" value="${item.id}">
                <input type="hidden" class="item-row-stock" value="${item.stock_quantity}">
                <input type="hidden" class="item-vat-rate" value="${vatRate}">
                <div><strong>${item.name_en}</strong></div>
                <div class="small text-muted">${item.name_ar} (${item.sku})</div>
            </td>
            <td><input type="number" step="0.001" name="quantities[]" class="form-control item-qty" value="${qty}" required></td>
            <td><input type="number" step="0.001" name="prices[]" class="form-control item-price" value="${price}" required></td>
            <td><input type="text" class="form-control bg-light" value="${parseFloat(vatRate || 0).toFixed(2)}%" readonly></td>
            <td><input type="number" step="0.001" class="form-control item-total" value="${(qty * price).toFixed(3)}" readonly></td>
            <td><button type="button" class="btn btn-outline-danger btn-sm remove-row"><i class="bi bi-trash"></i></button></td>
        `;
        
        tableBody.appendChild(row);
        attachRowListeners(row, tableBody, grandTotalEl, subtotalEl, totalVatEl);
        recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
    }

    function recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl) {
        let subtotal = 0;
        let totalVat = 0;
        tableBody.querySelectorAll('.item-row').forEach(row => {
            const qty = parseFloat(row.querySelector('.item-qty').value) || 0;
            const price = parseFloat(row.querySelector('.item-price').value) || 0;
            const vatRate = parseFloat(row.querySelector('.item-vat-rate').value) || 0;
            
            const total = qty * price;
            const vatAmount = total * (vatRate / 100);
            
            row.querySelector('.item-total').value = total.toFixed(3);
            subtotal += total;
            totalVat += vatAmount;
        });
        const grandTotal = subtotal + totalVat;
        
        if (subtotalEl) subtotalEl.textContent = 'OMR ' + subtotal.toFixed(3);
        if (totalVatEl) totalVatEl.textContent = 'OMR ' + totalVat.toFixed(2);
        if (grandTotalEl) grandTotalEl.textContent = 'OMR ' + grandTotal.toFixed(3);
    }

    function attachRowListeners(row, tableBody, grandTotalEl, subtotalEl, totalVatEl) {
        row.querySelector('.item-qty').addEventListener('input', function() {
            const allowZeroStock = (typeof companySettings !== 'undefined' && String(companySettings.allow_zero_stock_sell) === '1');
            if (invoiceType === 'sale' && !allowZeroStock) {
                const stock = parseFloat(row.querySelector('.item-row-stock').value) || 0;
                const qty = parseFloat(this.value) || 0;
                if (qty > stock) {
                    alert('Insufficient stock! Available: ' + stock);
                    this.value = stock;
                }
            }
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
        });
        row.querySelector('.item-price').addEventListener('input', () => recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl));
        row.querySelector('.remove-row').addEventListener('click', function() {
            row.remove();
            recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
        });
    }

    const invoiceType = 'sale';
    initInvoiceForm('productSearchInput', 'searchSuggestions', 'invoiceItemsTableBody', 'grandTotal', 'subtotal', 'totalVat');
    initInvoiceForm('editProductSearchInput', 'editSearchSuggestions', 'editInvoiceItemsTableBody', 'edit_grandTotal', 'edit_subtotal', 'edit_totalVat');
    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>ر.ع / OMR</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>ر.ع / OMR</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>ر.ع / OMR</small> ' + (grandTotalValue - vatVal).toFixed(3);
        if (document.getElementById('invVatAmount')) document.getElementById('invVatAmount').innerHTML = '<small>ر.ع / OMR</small> ' + vatVal.toFixed(2);
        if (document.getElementById('invGrandTotal')) document.getElementById('invGrandTotal').innerHTML = '<small>ر.ع / OMR</small> ' + grandTotalValue.toFixed(3);

        if (document.getElementById('invPaidInfo')) document.getElementById('invPaidInfo').innerHTML = '<small>ر.ع / OMR</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>ر.ع / OMR</small> ' + balance.toFixed(3);

        // Generate QR Code for Zakat, Tax and Customs Authority (ZATCA) style or simple formal
        const companyName = "Bahjet Al-Safa Trading";
        const vatNo = "OM25418";
        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));
    };

            // Edit Invoice Logic
    const parseInvoiceButtonPayload = (btn) => {
        if (!btn || !btn.dataset || !btn.dataset.json) return {};
        try {
            return JSON.parse(btn.dataset.json);
        } catch (error) {
            console.warn('Failed to parse invoice payload from button data.', error);
            return {};
        }
    };

    const syncSelect2Value = (select) => {
        if (!select) return;
        if (select.classList.contains('select2') && window.jQuery && jQuery.fn && jQuery.fn.select2) {
            jQuery(select).trigger('change');
        }
    };

    const ensureSelectOption = (selectId, value, label = '') => {
        const select = document.getElementById(selectId);
        if (!select || value === null || value === undefined || String(value) === '') return;

        const alreadyExists = Array.from(select.options || []).some(option => option.value == String(value));
        if (!alreadyExists) {
            const option = document.createElement('option');
            option.value = String(value);
            option.textContent = label || String(value);
            select.appendChild(option);
        }
    };

    const setBlankSelectOptionLabel = (select, label = '---') => {
        if (!select) return;
        const emptyOption = Array.from(select.options || []).find(option => option.value === '');
        if (emptyOption) {
            emptyOption.textContent = label;
        }
    };

    const normalizeEditPaymentType = (paymentType) => {
        let normalized = String(paymentType || 'cash').toLowerCase().replace(/[\s-]+/g, '_');
        if (normalized === 'pos') normalized = 'cash';
        if (!['cash', 'card', 'bank_transfer', 'credit'].includes(normalized)) {
            normalized = 'cash';
        }
        return normalized;
    };

    const renderEditInvoiceItems = (items) => {
        const tableBody = document.getElementById('editInvoiceItemsTableBody');
        const grandTotalEl = document.getElementById('edit_grandTotal');
        const subtotalEl = document.getElementById('edit_subtotal');
        const totalVatEl = document.getElementById('edit_totalVat');

        if (!tableBody) return;
        tableBody.innerHTML = '';

        if (!Array.isArray(items) || items.length === 0) {
            if (typeof recalculate === 'function') {
                recalculate(tableBody, grandTotalEl, subtotalEl, totalVatEl);
            }
            return;
        }

        items.forEach(item => {
            addItemToTable({
                id: item.item_id || item.id,
                name_en: item.name_en || item.item_name_en || 'Item',
                name_ar: item.name_ar || item.item_name_ar || '',
                sku: item.sku || '',
                vat_rate: item.vat_rate || 0,
                stock_quantity: item.stock_quantity || 0
            }, tableBody, null, null, grandTotalEl, subtotalEl, totalVatEl, {
                quantity: item.quantity,
                unit_price: item.unit_price
            });
        });
    };

    const populateEditInvoiceModal = (data) => {
        if (!data) return;

        const invoiceIdInput = document.getElementById('edit_invoice_id');
        const partySelect = document.getElementById('edit_customer_id');
        const invoiceDateInput = document.getElementById('edit_invoice_date');
        const dueDateInput = document.getElementById('edit_due_date');
        const paymentTypeSelect = document.getElementById('edit_payment_type');
        const statusSelect = document.getElementById('edit_status');
        const paidAmountInput = document.getElementById('edit_paid_amount');
        const paidAmountContainer = document.getElementById('editPaidAmountContainer');

        const partyId = data.customer_id ?? data.supplier_id ?? '';
        const partyLabel = data.party_name || data.customer_name || data.supplier_name || '';

        ensureSelectOption('edit_customer_id', partyId, partyLabel);

        if (invoiceIdInput) invoiceIdInput.value = data.id || '';
        if (partySelect) {
            setBlankSelectOptionLabel(partySelect, (partyId === '' && partyLabel) ? partyLabel : '---');
            partySelect.value = partyId;
            syncSelect2Value(partySelect);
        }
        if (invoiceDateInput) invoiceDateInput.value = data.invoice_date || '';
        if (dueDateInput) dueDateInput.value = data.due_date || '';
        if (paymentTypeSelect) paymentTypeSelect.value = normalizeEditPaymentType(data.payment_type);
        if (statusSelect) statusSelect.value = data.status || 'unpaid';
        if (paidAmountInput) paidAmountInput.value = parseFloat(data.paid_amount || 0).toFixed(3);
        if (paidAmountContainer) {
            paidAmountContainer.style.display = data.status === 'partially_paid' ? 'block' : 'none';
        }

        renderEditInvoiceItems(data.items || []);
    };

    document.querySelectorAll('.edit-invoice-btn').forEach(btn => {
        btn.addEventListener('click', async function() {
            const fallbackData = parseInvoiceButtonPayload(this);
            const invoiceId = this.dataset.id || fallbackData.id || '';
            const type = this.dataset.type || fallbackData.type || invoiceType || 'sale';
            const tableBody = document.getElementById('editInvoiceItemsTableBody');

            if (Object.keys(fallbackData).length > 0) {
                populateEditInvoiceModal(fallbackData);
            } else if (tableBody) {
                tableBody.innerHTML = '<tr><td colspan="6" class="text-center"><div class="spinner-border spinner-border-sm text-primary"></div> <span data-en="Loading invoice..." data-ar="جاري تحميل الفاتورة...">Loading invoice...</span></td></tr>';
            }

            if (!invoiceId) return;

            try {
                const resp = await fetch(`index.php?action=get_invoice_details&invoice_id=${encodeURIComponent(invoiceId)}&type=${encodeURIComponent(type)}`);
                const data = await resp.json();

                if (data && data.id) {
                    populateEditInvoiceModal(data);
                } else if (data && data.error) {
                    throw new Error(data.error);
                }
            } catch (error) {
                console.error('Failed to load invoice details for edit modal.', error);
                if (window.Swal) {
                    Swal.fire('Error', 'Failed to load invoice details', 'error');
                }
            }
        });
    });

    // View and Print Invoice Logic
    
    } catch (e) { console.error("JS Error in DOMContentLoaded:", e); }
});