// 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<?= $dir === 'rtl' ? '.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);
        });
    });