.dart

    pdf.addPage(
      pw.MultiPage(
        pageFormat: PdfPageFormat.a4,
        margin: const pw.EdgeInsets.all(24),
        build: (pw.Context context) {
          return [
            _buildStoreInfoSection(invoice, formattedDate, storeLogo),
            pw.SizedBox(height: 24),
            _buildBillToInfo(invoice),
            pw.SizedBox(height: 24),
            _buildInvoiceSummaryCard(invoice, itemImages),
            pw.SizedBox(height: 24),
            if (invoice.termsAndConditions != "") _buildTermsAndConditions(invoice.termsAndConditions),
            if (invoice.supportingImages.isNotEmpty) ...[
              pw.SizedBox(height: 10),
              _buildSupportingImages(invoice.supportingImages, supportingImages),
              pw.SizedBox(height: 10),
            ],
            pw.SizedBox(height: 40),
            _buildFooter(vendawLogo),
          ];
        },
      ),
    );

//InvoiceSummaryCard Section

  static pw.Widget _buildInvoiceSummaryCard(InvoiceModel invoice, Map<String, pw.MemoryImage> loadedItemImages) {
    return pw.Container(
      decoration: pw.BoxDecoration(
        border: pw.Border.all(color: flutterToPdfColor(AppColors.grey100)),
        borderRadius: pw.BorderRadius.circular(8),
      ),
      child: pw.Column(
        children: [
          _buildInvoiceSummaryHeader(),
          _buildInvoiceItemList(invoice, loadedItemImages),
          _buildInvoiceSummaryDetails(invoice),
          _buildPaymentScheduleSection(invoice),
        ],
      ),
    );
  }
  
    static pw.Widget _buildInvoiceItemList(InvoiceModel invoice, Map<String, pw.MemoryImage> loadedItemImages) {
    return pw.Padding(
      padding: const pw.EdgeInsets.all(8),
      child: pw.Column(
        mainAxisSize: pw.MainAxisSize.min,
        children: invoice.items
            .map(
              (item) => pw.Padding(
                padding: const pw.EdgeInsets.only(bottom: 12),
                child: _buildInvoiceSummaryItem(item, loadedItemImages),
              ),
            )
            .toList(),
      ),
    );
  }

  static pw.Widget _buildInvoiceSummaryDetails(InvoiceModel invoice) {
    double total = (invoice.total - invoice.fee).toDouble();

    return pw.Padding(
      padding: const pw.EdgeInsets.symmetric(horizontal: 8),
      child: pw.Column(
        crossAxisAlignment: pw.CrossAxisAlignment.start,
        children: [
          // pw.SizedBox(height: 8),
          _buildDottedLine(),
          pw.SizedBox(height: 16),
          _buildOrderSummaryPriceInfo("Subtotal", AppUtils.formatCurrencyWithoutSymbol(invoice.subtotal.toDouble())),
          pw.SizedBox(height: 8),
          _buildOrderSummaryPriceInfo("Discount", AppUtils.formatCurrencyWithoutSymbol(invoice.discount.toDouble())),
          pw.SizedBox(height: 8),
          _buildOrderSummaryPriceInfo(
              "Delivery Fee", AppUtils.formatCurrencyWithoutSymbol(invoice.deliveryFee.toDouble())),
          if (invoice.damagesCharge != 0) ...[
            pw.SizedBox(height: 8),
            _buildOrderSummaryPriceInfo(
                "Damages Charge", AppUtils.formatCurrencyWithoutSymbol(invoice.damagesCharge.toDouble())),
          ],
          if (invoice.serviceCharge != 0) ...[
            pw.SizedBox(height: 8),
            _buildOrderSummaryPriceInfo(
                "Service Charge", AppUtils.formatCurrencyWithoutSymbol(invoice.serviceCharge.toDouble())),
          ],
          if (invoice.vat != 0) ...[
            pw.SizedBox(height: 8),
            _buildOrderSummaryPriceInfo("VAT", "${invoice.vat}%", isPrice: false),
          ],
          pw.SizedBox(height: 4),
          pw.Container(
            height: 1,
            width: double.infinity,
            color: flutterToPdfColor(AppColors.grey300),
          ),
          pw.SizedBox(height: 4),
          if (invoice.status.toLowerCase() == "partial_payment")
            _buildOrderSummaryPriceInfo(
              "Amount Paid",
              AppUtils.formatCurrencyWithoutSymbol(
                  invoice.payments.isEmpty ? 0.0 : double.parse(invoice.payments.first.amount)),
              isBold: true,
            )
          else
            _buildOrderSummaryPriceInfo(
              "Amount Paid",
              AppUtils.formatCurrencyWithoutSymbol(total),
              isBold: true,
            ),
          pw.SizedBox(height: 8),
        ],
      ),
    );
  }

  static pw.Widget _buildPaymentScheduleSection(InvoiceModel invoice) {
    final sortedSchedule = [...invoice.paymentSchedule]
      ..sort((a, b) => (a.dueDate ?? DateTime(2100)).compareTo(b.dueDate ?? DateTime(2100)));

    if (sortedSchedule.isEmpty) return pw.SizedBox();

    return pw.Container(
      width: double.infinity,
      padding: const pw.EdgeInsets.all(8),
      decoration: pw.BoxDecoration(
        color: flutterToPdfColor(AppColors.invoiceGrey),
        borderRadius: const pw.BorderRadius.only(
          bottomLeft: pw.Radius.circular(8),
          bottomRight: pw.Radius.circular(8),
        ),
      ),
      child: pw.Column(
        children: sortedSchedule.asMap().entries.map((entry) {
          final index = entry.key;
          final schedule = entry.value;
          return pw.Container(
            margin: pw.EdgeInsets.only(bottom: index < sortedSchedule.length - 1 ? 5 : 0),
            child: pw.Column(
              children: [
                _buildPaymentScheduleItem(schedule, index, invoice.allowPartPayment),
                if (index < sortedSchedule.length - 1)
                  pw.Container(
                    margin: const pw.EdgeInsets.symmetric(vertical: 5),
                    height: 1,
                    width: double.infinity,
                    color: flutterToPdfColor(AppColors.white.withOpacity(0.4)),
                  ),
              ],
            ),
          );
        }).toList(),
      ),
    );
  }