first commit

lib/service/thermal_print/src/templates/_due_collection_invoice_template.dart

@@ -0,0 +1,304 @@
+import 'dart:typed_data';
+import 'package:esc_pos_utils_plus/esc_pos_utils_plus.dart';
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+import 'package:image/image.dart' as img;
+import 'package:mobile_pos/Const/api_config.dart';
+import 'package:mobile_pos/generated/l10n.dart' as lang;
+import 'package:mobile_pos/thermal%20priting%20invoices/model/print_transaction_model.dart';
+import '../../thermer/thermer.dart' as thermer;
+
+class DueThermalInvoiceTemplate {
+  DueThermalInvoiceTemplate({
+    required this.printDueTransactionModel,
+    required this.is58mm,
+    required this.context,
+    required this.isRTL,
+  });
+
+  final PrintDueTransactionModel printDueTransactionModel;
+  final bool is58mm;
+  final BuildContext context;
+  final bool isRTL;
+
+  // --- Helpers: Styles & Formats ---
+
+  thermer.TextStyle _commonStyle({double fontSize = 24, bool isBold = false}) {
+    return thermer.TextStyle(
+      fontSize: fontSize,
+      fontWeight: isBold ? thermer.FontWeight.bold : thermer.FontWeight.w500,
+      color: thermer.Colors.black,
+    );
+  }
+
+  String formatPointNumber(num number, {bool addComma = false}) {
+    if (addComma) return NumberFormat("#,###.##", "en_US").format(number);
+    return number.toStringAsFixed(2);
+  }
+
+  // --- Main Generator ---
+
+  Future<List<int>> get template async {
+    final _lang = lang.S.of(context);
+    final _profile = await CapabilityProfile.load();
+    final _generator = Generator(is58mm ? PaperSize.mm58 : PaperSize.mm80, _profile);
+
+    final _imageBytes = await _generateLayout(_lang);
+    final _image = img.decodeImage(_imageBytes);
+
+    if (_image == null) throw Exception('Failed to generate receipt.');
+
+    List<int> _bytes = [];
+    _bytes += _generator.image(_image);
+    _bytes += _generator.cut();
+    return _bytes;
+  }
+
+  Future<Uint8List> _generateLayout(lang.S _lang) async {
+    final data = printDueTransactionModel.dueTransactionModel;
+    final info = printDueTransactionModel.personalInformationModel.data;
+
+    // 1. Prepare Logo
+    thermer.ThermerImage? _logo;
+    if (info?.thermalInvoiceLogo != null && info?.showThermalInvoiceLogo == 1) {
+      try {
+        _logo = await thermer.ThermerImage.network(
+          "${APIConfig.domain}${info?.thermalInvoiceLogo}",
+          width: is58mm ? 120 : 184,
+          height: is58mm ? 120 : 184,
+        );
+      } catch (_) {}
+    }
+
+    //qr logo
+    thermer.ThermerImage? _qrLogo;
+    if (info?.invoiceScannerLogo != null && info?.showInvoiceScannerLogo == 1) {
+      try {
+        _qrLogo = await thermer.ThermerImage.network(
+          APIConfig.domain + info!.invoiceScannerLogo!,
+          width: is58mm ? 120 : 140,
+          height: is58mm ? 120 : 140,
+        );
+      } catch (_) {}
+    }
+
+    // 2. Prepare Payment Labels
+    final paymentLabels = _buildPaymentLabels();
+
+    // 3. Build Layout
+    final _layout = thermer.ThermerLayout(
+      paperSize: is58mm ? thermer.PaperSize.mm58 : thermer.PaperSize.mm80,
+      textDirection: isRTL ? thermer.TextDirection.rtl : thermer.TextDirection.ltr,
+      widgets: [
+        // --- Header ---
+        if (_logo != null) ...[thermer.ThermerAlign(child: _logo), thermer.ThermerSizedBox(height: 16)],
+
+        if (info?.meta?.showCompanyName == 1)
+          thermer.ThermerText(
+            info?.companyName ?? '',
+            style: _commonStyle(fontSize: is58mm ? 46 : 54),
+            textAlign: thermer.TextAlign.center,
+          ),
+
+        if (data?.branch?.name != null)
+          thermer.ThermerText('Branch: ${data?.branch?.name}',
+              style: _commonStyle(), textAlign: thermer.TextAlign.center),
+
+        if (info?.meta?.showAddress == 1)
+          if (data?.branch?.address != null || info?.address != null)
+            thermer.ThermerText(
+              '${_lang.address}: ${data?.branch?.address ?? info?.address ?? ''}',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (info?.meta?.showPhoneNumber == 1)
+          if (data?.branch?.phone != null || info?.phoneNumber != null)
+            thermer.ThermerText(
+              '${_lang.mobile} ${data?.branch?.phone ?? info?.phoneNumber ?? ''}',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (info?.meta?.showVat == 1)
+          if (info?.vatNo != null && info?.meta?.showVat == 1)
+            thermer.ThermerText(
+              "${info?.vatName ?? _lang.vatNumber}: ${info?.vatNo}",
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        thermer.ThermerSizedBox(height: 16),
+        thermer.ThermerText(
+          _lang.receipt, // Due collection is usually a Receipt
+          style: _commonStyle(fontSize: is58mm ? 30 : 48, isBold: true)
+              .copyWith(decoration: thermer.TextDecoration.underline),
+          textAlign: thermer.TextAlign.center,
+        ),
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Info Section ---
+        ..._buildInfoSection(_lang),
+
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Data Table (Single Row for Due Context) ---
+        thermer.ThermerTable(
+          header: thermer.ThermerTableRow([
+            if (!is58mm) thermer.ThermerText(_lang.sl, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.invoice, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.dueAmount, textAlign: thermer.TextAlign.end, style: _commonStyle(isBold: true)),
+          ]),
+          data: [
+            thermer.ThermerTableRow([
+              if (!is58mm) thermer.ThermerText('1', style: _commonStyle()),
+              thermer.ThermerText(data?.invoiceNumber ?? '', style: _commonStyle()),
+              thermer.ThermerText(formatPointNumber(data?.totalDue ?? 0, addComma: true),
+                  textAlign: thermer.TextAlign.end, style: _commonStyle()),
+            ])
+          ],
+          cellWidths: is58mm ? {0: null, 1: 0.3} : {0: 0.1, 1: null, 2: 0.3},
+        ),
+        thermer.ThermerDivider.horizontal(),
+
+        // --- Calculations ---
+        _buildCalculationColumn(_lang),
+
+        thermer.ThermerDivider.horizontal(),
+        thermer.ThermerSizedBox(height: 8),
+
+        // --- Payment Info ---
+        thermer.ThermerText(
+          "${_lang.paidVia} : ${paymentLabels.join(', ')}",
+          style: _commonStyle(),
+          textAlign: thermer.TextAlign.left,
+        ),
+
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Footer ---
+        if (info?.gratitudeMessage != null && info?.showGratitudeMsg == 1)
+          thermer.ThermerText(info?.gratitudeMessage ?? '',
+              textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+
+        if (data?.paymentDate != null)
+          thermer.ThermerText(
+            DateFormat('M/d/yyyy h:mm a').format(DateTime.parse(data!.paymentDate!)),
+            textAlign: thermer.TextAlign.center,
+            style: _commonStyle(),
+          ),
+
+        if (info?.showNote == 1)
+          thermer.ThermerText(
+            '${info?.invoiceNoteLevel ?? _lang.note}: ${info?.invoiceNote ?? ''}',
+            textAlign: thermer.TextAlign.left,
+            style: _commonStyle(),
+          ),
+
+        thermer.ThermerSizedBox(height: 16),
+        if (_qrLogo != null) ...[thermer.ThermerAlign(child: _qrLogo), thermer.ThermerSizedBox(height: 1)],
+
+        if (info?.developBy != null)
+          thermer.ThermerText(
+            '${info?.developByLevel ?? _lang.developedBy}: ${info?.developBy}',
+            textAlign: thermer.TextAlign.center,
+            style: _commonStyle(),
+          ),
+
+        thermer.ThermerSizedBox(height: 200), // Cutter Space
+      ],
+    );
+
+    return _layout.toUint8List();
+  }
+
+  // --- Sub-Builders ---
+
+  List<thermer.ThermerWidget> _buildInfoSection(lang.S _lang) {
+    final data = printDueTransactionModel.dueTransactionModel;
+    final dateStr = data?.paymentDate != null ? DateFormat.yMd().format(DateTime.parse(data!.paymentDate!)) : '';
+    final timeStr = data?.paymentDate != null ? DateFormat.jm().format(DateTime.parse(data!.paymentDate!)) : '';
+
+    final receiptText = '${_lang.receipt}: ${data?.invoiceNumber ?? 'Not Provided'}';
+    final dateText = '${_lang.date}: $dateStr';
+    final timeText = '${_lang.time}: $timeStr';
+    final nameText = '${_lang.receivedFrom}: ${data?.party?.name ?? ''}';
+    final mobileText = '${_lang.mobile} ${data?.party?.phone ?? ''}';
+    final receivedByText =
+        '${_lang.receivedBy}: ${data?.user?.role == "shop-owner" ? 'Admin' : data?.user?.name ?? ''}';
+
+    if (is58mm) {
+      // 58mm: Stacked
+      return [
+        thermer.ThermerText(receiptText, style: _commonStyle()),
+        if (data?.paymentDate != null) thermer.ThermerText("$dateText $timeStr", style: _commonStyle()),
+        thermer.ThermerText(nameText, style: _commonStyle()),
+        thermer.ThermerText(mobileText, style: _commonStyle()),
+        thermer.ThermerText(receivedByText, style: _commonStyle()),
+      ];
+    } else {
+      // 80mm: Two Columns
+      return [
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(receiptText, style: _commonStyle()),
+            if (data?.paymentDate != null) thermer.ThermerText(dateText, style: _commonStyle()),
+          ],
+        ),
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(nameText, style: _commonStyle()),
+            thermer.ThermerText(timeText, style: _commonStyle()),
+          ],
+        ),
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(mobileText, style: _commonStyle()),
+            thermer.ThermerText(receivedByText, style: _commonStyle()),
+          ],
+        ),
+      ];
+    }
+  }
+
+  thermer.ThermerColumn _buildCalculationColumn(lang.S _lang) {
+    final data = printDueTransactionModel.dueTransactionModel;
+
+    thermer.ThermerRow calcRow(String label, num value, {bool bold = false, bool isCurrency = true}) {
+      return thermer.ThermerRow(
+        mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+        children: [
+          thermer.ThermerText(label, style: _commonStyle(isBold: bold)),
+          thermer.ThermerText(
+            isCurrency ? formatPointNumber(value, addComma: true) : value.toString(),
+            textAlign: thermer.TextAlign.end,
+            style: _commonStyle(isBold: bold),
+          ),
+        ],
+      );
+    }
+
+    return thermer.ThermerColumn(children: [
+      calcRow('${_lang.totalDue}:', data?.totalDue ?? 0),
+      calcRow('${_lang.paymentsAmount}:', data?.payDueAmount ?? 0, bold: true),
+      calcRow('${_lang.remainingDue}:', data?.dueAmountAfterPay ?? 0, bold: true),
+    ]);
+  }
+
+  List<String> _buildPaymentLabels() {
+    final transactions = printDueTransactionModel.dueTransactionModel?.transactions ?? [];
+    List<String> labels = [];
+
+    for (var item in transactions) {
+      String label = item.paymentType?.name ?? 'n/a';
+      if (item.transactionType == 'cash_payment') label = lang.S.of(context).cash;
+      if (item.transactionType == 'cheque_payment') label = lang.S.of(context).cheque;
+      if (item.transactionType == 'wallet_payment') label = lang.S.of(context).wallet;
+      labels.add(label);
+    }
+    return labels;
+  }
+}

lib/service/thermal_print/src/templates/_purchase_invoice_template.dart

@@ -0,0 +1,476 @@
+import 'dart:typed_data';
+
+import 'package:esc_pos_utils_plus/esc_pos_utils_plus.dart';
+import 'package:flutter/material.dart';
+import 'package:image/image.dart' as img;
+import 'package:intl/intl.dart';
+import 'package:mobile_pos/Const/api_config.dart';
+import 'package:mobile_pos/Screens/Products/add%20product/modle/create_product_model.dart';
+import 'package:mobile_pos/Screens/Purchase/Model/purchase_transaction_model.dart';
+import 'package:mobile_pos/generated/l10n.dart' as lang;
+import 'package:mobile_pos/thermal%20priting%20invoices/model/print_transaction_model.dart';
+
+import '../../thermer/thermer.dart' as thermer;
+
+class PurchaseThermalInvoiceTemplate {
+  PurchaseThermalInvoiceTemplate({
+    required this.printTransactionModel,
+    required this.productList,
+    required this.is58mm,
+    required this.context,
+    required this.isRTL,
+  });
+
+  final PrintPurchaseTransactionModel printTransactionModel;
+  final List<PurchaseDetails>? productList;
+  final bool is58mm;
+  final BuildContext context;
+  final bool isRTL;
+
+  // --- Helpers: Styles & Formats ---
+
+  thermer.TextStyle _commonStyle({double fontSize = 24, bool isBold = false}) {
+    return thermer.TextStyle(
+      fontSize: fontSize,
+      fontWeight: isBold ? thermer.FontWeight.bold : thermer.FontWeight.w500,
+      color: thermer.Colors.black,
+    );
+  }
+
+  String formatPointNumber(num number, {bool addComma = false}) {
+    if (addComma) return NumberFormat("#,###.##", "en_US").format(number);
+    return number.toStringAsFixed(2);
+  }
+
+  // --- Data Logic (Adapted from your provided code) ---
+
+  num _getProductPrice(num detailsId) {
+    return productList!.where((element) => element.id == detailsId).first.productPurchasePrice ?? 0;
+  }
+
+  String _getProductName(num detailsId) {
+    final details = printTransactionModel.purchaseTransitionModel?.details?.firstWhere(
+      (element) => element.id == detailsId,
+      orElse: () => PurchaseDetails(),
+    );
+    String name = details?.product?.productName ?? '';
+    if (details?.product?.productType == ProductType.variant.name) {
+      name += ' [${details?.stock?.batchNo ?? ''}]';
+    }
+    return name;
+  }
+
+  num _getProductQuantity(num detailsId) {
+    num totalQuantity = productList?.where((element) => element.id == detailsId).first.quantities ?? 0;
+
+    // Add returned quantities logic
+    if (printTransactionModel.purchaseTransitionModel?.purchaseReturns?.isNotEmpty ?? false) {
+      for (var returns in printTransactionModel.purchaseTransitionModel!.purchaseReturns!) {
+        if (returns.purchaseReturnDetails?.isNotEmpty ?? false) {
+          for (var details in returns.purchaseReturnDetails!) {
+            if (details.purchaseDetailId == detailsId) {
+              totalQuantity += details.returnQty ?? 0;
+            }
+          }
+        }
+      }
+    }
+    return totalQuantity;
+  }
+
+  num _getTotalForOldInvoice() {
+    num total = 0;
+    if (productList != null) {
+      for (var element in productList!) {
+        num productPrice = element.productPurchasePrice ?? 0;
+        num productQuantity = _getProductQuantity(element.id ?? 0);
+        total += productPrice * productQuantity;
+      }
+    }
+    return total;
+  }
+
+  num _getReturnedDiscountAmount() {
+    num totalReturnDiscount = 0;
+    if (printTransactionModel.purchaseTransitionModel?.purchaseReturns?.isNotEmpty ?? false) {
+      for (var returns in printTransactionModel.purchaseTransitionModel!.purchaseReturns!) {
+        if (returns.purchaseReturnDetails?.isNotEmpty ?? false) {
+          for (var details in returns.purchaseReturnDetails!) {
+            totalReturnDiscount += ((_getProductPrice(details.purchaseDetailId ?? 0) * (details.returnQty ?? 0)) -
+                ((details.returnAmount ?? 0)));
+          }
+        }
+      }
+    }
+    return totalReturnDiscount;
+  }
+
+  num _getTotalReturnedAmount() {
+    num totalReturn = 0;
+    if (printTransactionModel.purchaseTransitionModel?.purchaseReturns?.isNotEmpty ?? false) {
+      for (var returns in printTransactionModel.purchaseTransitionModel!.purchaseReturns!) {
+        if (returns.purchaseReturnDetails?.isNotEmpty ?? false) {
+          for (var details in returns.purchaseReturnDetails!) {
+            totalReturn += details.returnAmount ?? 0;
+          }
+        }
+      }
+    }
+    return totalReturn;
+  }
+
+  // --- Main Generator ---
+
+  Future<List<int>> get template async {
+    final _profile = await CapabilityProfile.load();
+    final _generator = Generator(is58mm ? PaperSize.mm58 : PaperSize.mm80, _profile);
+
+    final _imageBytes = await _generateLayout();
+    final _image = img.decodeImage(_imageBytes);
+
+    if (_image == null) throw Exception('Failed to generate invoice.');
+
+    List<int> _bytes = [];
+    _bytes += _generator.image(_image);
+    _bytes += _generator.cut();
+    return _bytes;
+  }
+
+  Future<Uint8List> _generateLayout() async {
+    final data = printTransactionModel.purchaseTransitionModel;
+    final info = printTransactionModel.personalInformationModel.data;
+    final _lang = lang.S.of(context);
+
+    // 1. Prepare Logo
+    thermer.ThermerImage? _logo;
+    if (info?.thermalInvoiceLogo != null && info?.showThermalInvoiceLogo == 1) {
+      try {
+        _logo = await thermer.ThermerImage.network(
+          "${APIConfig.domain}${info?.thermalInvoiceLogo}",
+          width: is58mm ? 120 : 184,
+          height: is58mm ? 120 : 184,
+        );
+      } catch (_) {}
+    }
+
+    //qr logo
+    thermer.ThermerImage? _qrLogo;
+    if (info?.invoiceScannerLogo != null && info?.showInvoiceScannerLogo == 1) {
+      try {
+        _qrLogo = await thermer.ThermerImage.network(
+          APIConfig.domain + info!.invoiceScannerLogo!,
+          width: is58mm ? 120 : 140,
+          height: is58mm ? 120 : 140,
+        );
+      } catch (_) {}
+    }
+
+    // 2. Prepare Product Rows
+    final productRows = _buildProductRows();
+
+    // 3. Prepare Returns
+    final returnWidgets = _buildReturnSection(_lang);
+
+    // 4. Build Layout
+    final _layout = thermer.ThermerLayout(
+      paperSize: is58mm ? thermer.PaperSize.mm58 : thermer.PaperSize.mm80,
+      textDirection: isRTL ? thermer.TextDirection.rtl : thermer.TextDirection.ltr,
+      widgets: [
+        // --- Header ---
+        if (_logo != null) ...[thermer.ThermerAlign(child: _logo), thermer.ThermerSizedBox(height: 16)],
+
+        if (info?.meta?.showCompanyName == 1)
+          thermer.ThermerText(
+            info?.companyName ?? '',
+            style: _commonStyle(fontSize: is58mm ? 46 : 54),
+            textAlign: thermer.TextAlign.center,
+          ),
+
+        if (data?.branch?.name != null)
+          thermer.ThermerText('${_lang.branch}: ${data?.branch?.name}',
+              style: _commonStyle(), textAlign: thermer.TextAlign.center),
+
+        if (info?.meta?.showAddress == 1)
+          if (data?.branch?.address != null || info?.address != null)
+            thermer.ThermerText(
+              '${_lang.address}: ${data?.branch?.address ?? info?.address ?? ''}',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (info?.meta?.showPhoneNumber == 1)
+          if (data?.branch?.phone != null || info?.phoneNumber != null)
+            thermer.ThermerText(
+              '${_lang.mobile} ${data?.branch?.phone ?? info?.phoneNumber ?? ''}',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (info?.meta?.showVat == 1)
+          if (info?.vatNo != null && info?.meta?.showVat == 1)
+            thermer.ThermerText(
+              "${info?.vatName ?? _lang.vatNumber}: ${info?.vatNo}",
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        thermer.ThermerSizedBox(height: 16),
+        thermer.ThermerText(
+          _lang.invoice,
+          style: _commonStyle(fontSize: is58mm ? 30 : 48, isBold: true)
+              .copyWith(decoration: thermer.TextDecoration.underline),
+          textAlign: thermer.TextAlign.center,
+        ),
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Info Section ---
+        ..._buildInfoSection(_lang),
+
+        thermer.ThermerSizedBox(height: 8),
+
+        // --- Product Table ---
+        thermer.ThermerTable(
+          header: thermer.ThermerTableRow([
+            if (!is58mm) thermer.ThermerText(_lang.sl, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.item, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.qty, textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.price, textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.total, textAlign: thermer.TextAlign.end, style: _commonStyle(isBold: true)),
+          ]),
+          data: productRows,
+          cellWidths: is58mm
+              ? {0: null, 1: 0.2, 2: 0.2, 3: 0.25} // 58mm
+              : {0: 0.1, 1: null, 2: 0.15, 3: 0.15, 4: 0.2}, // 80mm
+          columnSpacing: 10.0,
+          rowSpacing: 3.0,
+        ),
+        thermer.ThermerDivider.horizontal(),
+
+        // --- Calculations ---
+        if (!is58mm)
+          thermer.ThermerRow(
+            children: [
+              thermer.ThermerExpanded(flex: 4, child: thermer.ThermerAlign(child: _buildPaymentInfoText(_lang))),
+              thermer.ThermerExpanded(flex: 6, child: _buildCalculationColumn(_lang)),
+            ],
+          )
+        else ...[
+          _buildCalculationColumn(_lang),
+          thermer.ThermerDivider.horizontal(),
+          _buildPaymentInfoText(_lang),
+        ],
+
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Returns ---
+        ...returnWidgets,
+
+        // --- Footer ---
+        if (info?.gratitudeMessage != null && info?.showGratitudeMsg == 1)
+          thermer.ThermerText(info?.gratitudeMessage ?? '',
+              textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+
+        if (data?.purchaseDate != null)
+          thermer.ThermerText(
+            DateFormat('M/d/yyyy h:mm a').format(DateTime.parse(data!.purchaseDate!)),
+            textAlign: thermer.TextAlign.center,
+            style: _commonStyle(),
+          ),
+
+        thermer.ThermerSizedBox(height: 16),
+
+        if (info?.showNote == 1)
+          thermer.ThermerText(
+            '${info?.invoiceNoteLevel ?? _lang.note}: ${info?.invoiceNote ?? ''}',
+            textAlign: thermer.TextAlign.left,
+            style: _commonStyle(),
+          ),
+
+        thermer.ThermerSizedBox(height: 16),
+        if (_qrLogo != null) ...[thermer.ThermerAlign(child: _qrLogo), thermer.ThermerSizedBox(height: 1)],
+        // if (info?.developByLink != null)
+        //   thermer.ThermerAlign(child: thermer.ThermerQRCode(data: info?.developByLink ?? '', size: 120)),
+
+        if (info?.developBy != null)
+          thermer.ThermerText(
+            '${info?.developByLevel ?? _lang.developedBy}: ${info?.developBy}',
+            textAlign: thermer.TextAlign.center,
+            style: _commonStyle(),
+          ),
+
+        thermer.ThermerSizedBox(height: 200), // Cutter Space
+      ],
+    );
+
+    return _layout.toUint8List();
+  }
+
+  // --- Sub-Builders ---
+
+  List<thermer.ThermerWidget> _buildInfoSection(lang.S _lang) {
+    final data = printTransactionModel.purchaseTransitionModel;
+    final dateStr = data?.purchaseDate != null ? DateFormat.yMd().format(DateTime.parse(data!.purchaseDate!)) : '';
+    final timeStr = data?.purchaseDate != null ? DateFormat.jm().format(DateTime.parse(data!.purchaseDate!)) : '';
+
+    final invText = '${_lang.invoice}: ${data?.invoiceNumber ?? 'Not Provided'}';
+    final dateText = '${_lang.date}: $dateStr';
+    final timeText = '${_lang.time}: $timeStr';
+    final nameText = '${_lang.name}: ${data?.party?.name ?? 'Guest'}';
+    final mobileText = '${_lang.mobile} ${data?.party?.phone ?? ''}';
+    final purchaseByText = '${_lang.purchaseBy} ${data?.user?.role == "shop-owner" ? 'Admin' : data?.user?.name ?? ''}';
+
+    if (is58mm) {
+      return [
+        thermer.ThermerText(invText, style: _commonStyle()),
+        if (data?.purchaseDate != null) thermer.ThermerText("$dateText $timeStr", style: _commonStyle()),
+        thermer.ThermerText(nameText, style: _commonStyle()),
+        thermer.ThermerText(mobileText, style: _commonStyle()),
+        thermer.ThermerText(purchaseByText, style: _commonStyle()),
+      ];
+    } else {
+      return [
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(invText, style: _commonStyle()),
+            if (data?.purchaseDate != null) thermer.ThermerText(dateText, style: _commonStyle()),
+          ],
+        ),
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(nameText, style: _commonStyle()),
+            thermer.ThermerText(timeText, style: _commonStyle()),
+          ],
+        ),
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(mobileText, style: _commonStyle()),
+            thermer.ThermerText(purchaseByText, style: _commonStyle()),
+          ],
+        ),
+      ];
+    }
+  }
+
+  List<thermer.ThermerTableRow> _buildProductRows() {
+    List<thermer.ThermerTableRow> rows = [];
+    if (productList == null) return rows;
+
+    for (var index = 0; index < productList!.length; index++) {
+      final item = productList![index];
+      final qty = _getProductQuantity(item.id ?? 0);
+      final price = item.productPurchasePrice ?? 0;
+      final amount = price * qty;
+
+      rows.add(thermer.ThermerTableRow([
+        if (!is58mm) thermer.ThermerText('${index + 1}', style: _commonStyle()),
+        thermer.ThermerText(_getProductName(item.id ?? 0), style: _commonStyle()),
+        thermer.ThermerText(formatPointNumber(qty, addComma: true),
+            textAlign: thermer.TextAlign.center, style: _commonStyle()),
+        thermer.ThermerText(formatPointNumber(price, addComma: true),
+            textAlign: thermer.TextAlign.center, style: _commonStyle()),
+        thermer.ThermerText(formatPointNumber(amount, addComma: true),
+            textAlign: thermer.TextAlign.end, style: _commonStyle()),
+      ]));
+    }
+    return rows;
+  }
+
+  thermer.ThermerColumn _buildCalculationColumn(lang.S _lang) {
+    final data = printTransactionModel.purchaseTransitionModel;
+
+    thermer.ThermerRow calcRow(String label, num value, {bool bold = false, bool isCurrency = true}) {
+      return thermer.ThermerRow(
+        mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+        children: [
+          thermer.ThermerText(label, style: _commonStyle(isBold: bold)),
+          thermer.ThermerText(
+            isCurrency ? formatPointNumber(value, addComma: true) : value.toString(),
+            textAlign: thermer.TextAlign.end,
+            style: _commonStyle(isBold: bold),
+          ),
+        ],
+      );
+    }
+
+    return thermer.ThermerColumn(children: [
+      calcRow('${_lang.subTotal}:', _getTotalForOldInvoice()),
+      calcRow('${_lang.discount}:', (data?.discountAmount ?? 0) + _getReturnedDiscountAmount()),
+      calcRow('${data?.vat?.name ?? _lang.vat}:', data?.vatAmount ?? 0),
+      thermer.ThermerDivider.horizontal(),
+      if (_getTotalReturnedAmount() > 0) calcRow('${_lang.returnAmount}:', _getTotalReturnedAmount()),
+      calcRow('${_lang.totalPayable}:', data?.totalAmount ?? 0, bold: true),
+      calcRow('${_lang.paidAmount}:', ((data?.totalAmount ?? 0) - (data?.dueAmount ?? 0)) + (data?.changeAmount ?? 0)),
+      if ((data?.dueAmount ?? 0) > 0) calcRow('${_lang.dueAmount}', data?.dueAmount ?? 0),
+      if ((data?.changeAmount ?? 0) > 0) calcRow('${_lang.changeAmount}:', data?.changeAmount ?? 0),
+    ]);
+  }
+
+  thermer.ThermerText _buildPaymentInfoText(lang.S _lang) {
+    final transactions = printTransactionModel.purchaseTransitionModel?.transactions ?? [];
+    List<String> labels = [];
+
+    for (var item in transactions) {
+      String label = item.paymentType?.name ?? 'n/a';
+      if (item.transactionType == 'cash_payment') label = _lang.cash;
+      if (item.transactionType == 'cheque_payment') label = _lang.cheque;
+      if (item.transactionType == 'wallet_payment') label = _lang.wallet;
+      labels.add(label);
+    }
+    return thermer.ThermerText(
+      "${_lang.paidVia}: ${labels.join(', ')}",
+      style: _commonStyle(),
+      textAlign: is58mm ? thermer.TextAlign.left : thermer.TextAlign.left,
+    );
+  }
+
+  List<thermer.ThermerWidget> _buildReturnSection(lang.S _lang) {
+    final returns = printTransactionModel.purchaseTransitionModel?.purchaseReturns;
+    if (returns?.isEmpty ?? true) return [];
+
+    List<thermer.ThermerWidget> widgets = [];
+    List<String> processedDates = [];
+
+    for (var i = 0; i < (returns?.length ?? 0); i++) {
+      final dateStr = returns![i].returnDate?.substring(0, 10);
+      if (dateStr != null && !processedDates.contains(dateStr)) {
+        processedDates.add(dateStr);
+        widgets.add(thermer.ThermerDivider.horizontal());
+
+        // Return Header
+        widgets.add(thermer.ThermerRow(
+          children: [
+            if (!is58mm) thermer.ThermerText(_lang.sl, style: _commonStyle(isBold: true)),
+            thermer.ThermerText('${_lang.retur}-${DateFormat.yMd().format(DateTime.parse(returns[i].returnDate!))}',
+                style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.qty, textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.total, textAlign: thermer.TextAlign.end, style: _commonStyle(isBold: true)),
+          ],
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+        ));
+      }
+
+      widgets.add(thermer.ThermerTable(
+        data: (returns[i].purchaseReturnDetails ?? []).map((d) {
+          // Re-using index logic might be tricky here for SL, simplify if needed
+          return thermer.ThermerTableRow([
+            if (!is58mm) thermer.ThermerText('*', style: _commonStyle()), // Bullet for return items or dynamic index
+            thermer.ThermerText(_getProductName(d.purchaseDetailId ?? 0), style: _commonStyle()),
+            thermer.ThermerText('${d.returnQty ?? 0}', textAlign: thermer.TextAlign.center, style: _commonStyle()),
+            thermer.ThermerText(formatPointNumber(d.returnAmount ?? 0, addComma: true),
+                textAlign: thermer.TextAlign.end, style: _commonStyle()),
+          ]);
+        }).toList(),
+        cellWidths: is58mm ? {0: null, 1: 0.2, 2: 0.25} : {0: 0.1, 1: null, 2: 0.15, 3: 0.2},
+      ));
+    }
+
+    // Add Total Return Footer inside Calculation Column generally,
+    // but if you want separate divider:
+    widgets.add(thermer.ThermerDivider.horizontal());
+
+    return widgets;
+  }
+}

lib/service/thermal_print/src/templates/_sale_invoice_template.dart

@@ -0,0 +1,490 @@
+import 'dart:typed_data';
+
+import 'package:esc_pos_utils_plus/esc_pos_utils_plus.dart';
+import 'package:flutter/material.dart';
+import 'package:image/image.dart' as img;
+import 'package:intl/intl.dart';
+import 'package:mobile_pos/Const/api_config.dart';
+import 'package:mobile_pos/generated/l10n.dart' as lang;
+import 'package:mobile_pos/model/business_info_model.dart';
+import 'package:mobile_pos/model/sale_transaction_model.dart';
+import '../../thermer/thermer.dart' as thermer;
+
+class SaleThermalInvoiceTemplate {
+  SaleThermalInvoiceTemplate({
+    required this.saleInvoice,
+    required this.is58mm,
+    required this.business,
+    required this.context,
+    required this.isRTL,
+  });
+
+  final SalesTransactionModel saleInvoice;
+  final BusinessInformationModel business;
+  final bool is58mm;
+  final bool isRTL;
+  final BuildContext context;
+
+  // --- Helpers: Styles & Formats ---
+
+  /// Centralized Text Style to ensure Black Color everywhere
+  thermer.TextStyle _commonStyle({double fontSize = 24, bool isBold = false}) {
+    return thermer.TextStyle(
+      fontSize: fontSize,
+      fontWeight: isBold ? thermer.FontWeight.bold : thermer.FontWeight.w500,
+      color: thermer.Colors.black,
+    );
+  }
+
+  String formatPointNumber(num number, {bool addComma = false}) {
+    if (addComma) return NumberFormat("#,###.##", "en_US").format(number);
+    return number.toStringAsFixed(2);
+  }
+
+  // --- Data Logic ---
+
+  String _getProductName(num detailsId) {
+    final details = saleInvoice.salesDetails?.firstWhere(
+      (e) => e.id == detailsId,
+      orElse: () => SalesDetails(),
+    );
+    String name = details?.product?.productName ?? '';
+    if (details?.product?.productType == 'variant' && details?.stock?.batchNo != null) {
+      name += ' [${details!.stock!.batchNo}]';
+    }
+    return name;
+  }
+
+  num _getProductQty(num detailsId) {
+    num totalQty =
+        saleInvoice.salesDetails?.firstWhere((e) => e.id == detailsId, orElse: () => SalesDetails()).quantities ?? 0;
+
+    // Add returned quantities back logic
+    if (saleInvoice.salesReturns?.isNotEmpty ?? false) {
+      for (var ret in saleInvoice.salesReturns!) {
+        for (var det in ret.salesReturnDetails ?? []) {
+          if (det.saleDetailId == detailsId) totalQty += det.returnQty ?? 0;
+        }
+      }
+    }
+    return totalQty;
+  }
+
+  // --- Main Generator ---
+
+  @override
+  Future<List<int>> get template async {
+    final _profile = await CapabilityProfile.load();
+    final _generator = Generator(is58mm ? PaperSize.mm58 : PaperSize.mm80, _profile);
+
+    // Generate Layout
+    final _imageBytes = await _generateLayout();
+    final _image = img.decodeImage(_imageBytes);
+
+    if (_image == null) throw Exception('Failed to generate invoice.');
+
+    List<int> _bytes = [];
+    _bytes += _generator.image(_image);
+    _bytes += _generator.cut();
+    return _bytes;
+  }
+
+  Future<Uint8List> _generateLayout() async {
+    final _lang = lang.S.of(context);
+    // 1. Prepare Logo
+    thermer.ThermerImage? _logo;
+    if (business.data?.thermalInvoiceLogo != null && business.data?.showThermalInvoiceLogo == 1) {
+      try {
+        _logo = await thermer.ThermerImage.network(
+          APIConfig.domain + business.data!.thermalInvoiceLogo!,
+          width: is58mm ? 120 : 200,
+          height: is58mm ? 120 : 200,
+        );
+      } catch (_) {}
+    }
+
+    //qr logo
+    thermer.ThermerImage? _qrLogo;
+    if (business.data?.invoiceScannerLogo != null && business.data?.showInvoiceScannerLogo == 1) {
+      try {
+        _qrLogo = await thermer.ThermerImage.network(
+          APIConfig.domain + business.data!.invoiceScannerLogo!,
+          width: is58mm ? 120 : 140,
+          height: is58mm ? 120 : 140,
+        );
+      } catch (_) {}
+    }
+
+    // 2. Prepare Product Rows
+    final productRows = _buildProductRows();
+
+    // 3. Prepare Return Section
+    final returnWidgets = _buildReturnSection(context);
+
+    // 4. Build Layout
+    final _layout = thermer.ThermerLayout(
+      textDirection: isRTL ? thermer.TextDirection.rtl : thermer.TextDirection.ltr,
+      paperSize: is58mm ? thermer.PaperSize.mm58 : thermer.PaperSize.mm80,
+      widgets: [
+        // --- Header Section ---
+        if (_logo != null) ...[thermer.ThermerAlign(child: _logo), thermer.ThermerSizedBox(height: 16)],
+
+        if (business.data?.meta?.showCompanyName == 1)
+          thermer.ThermerText(
+            business.data?.companyName ?? "N/A",
+            style: _commonStyle(fontSize: is58mm ? 46 : 54, isBold: false),
+            textAlign: thermer.TextAlign.center,
+          ),
+
+        if (saleInvoice.branch?.name != null)
+          thermer.ThermerText('${_lang.branch}: ${saleInvoice.branch?.name}',
+              style: _commonStyle(), textAlign: thermer.TextAlign.center),
+
+        if (business.data?.meta?.showAddress == 1)
+          if (business.data?.address != null || saleInvoice.branch?.address != null)
+            thermer.ThermerText(
+              saleInvoice.branch?.address ?? business.data?.address ?? 'N/A',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (business.data?.meta?.showPhoneNumber == 1)
+          if (business.data?.phoneNumber != null || saleInvoice.branch?.phone != null)
+            thermer.ThermerText(
+              '${_lang.mobile} ${saleInvoice.branch?.phone ?? business.data?.phoneNumber ?? "N/A"}',
+              style: _commonStyle(),
+              textAlign: thermer.TextAlign.center,
+            ),
+
+        if (business.data?.vatName != null && business.data?.meta?.showVat == 1)
+          thermer.ThermerText("${business.data?.vatName}: ${business.data?.vatNo}",
+              style: _commonStyle(), textAlign: thermer.TextAlign.center),
+
+        thermer.ThermerSizedBox(height: 16),
+        thermer.ThermerText(
+          _lang.invoice,
+          style: _commonStyle(fontSize: is58mm ? 30 : 48, isBold: true)
+              .copyWith(decoration: thermer.TextDecoration.underline),
+          textAlign: thermer.TextAlign.center,
+        ),
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Info Section (Layout adjusted based on is58mm) ---
+        ..._buildInfoSection(_lang),
+
+        thermer.ThermerSizedBox(height: 8),
+
+        // --- Product Table ---
+        thermer.ThermerTable(
+          header: thermer.ThermerTableRow([
+            if (!is58mm) thermer.ThermerText(_lang.sl, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.item, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.qty, textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.price, textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+            thermer.ThermerText(_lang.amount, textAlign: thermer.TextAlign.end, style: _commonStyle(isBold: true)),
+          ]),
+          data: productRows,
+          cellWidths: is58mm
+              ? {0: null, 1: 0.2, 2: 0.15, 3: 0.2} // 58mm layout
+              : {0: 0.1, 1: null, 2: 0.15, 3: 0.2, 4: 0.2}, // 80mm layout
+          columnSpacing: 15.0,
+          rowSpacing: 3.0,
+        ),
+        thermer.ThermerDivider.horizontal(),
+
+        // --- Totals Section ---
+        if (!is58mm)
+          // 80mm Split Layout
+          thermer.ThermerRow(
+            children: [
+              thermer.ThermerExpanded(flex: 4, child: thermer.ThermerAlign(child: _buildPaymentInfoText(_lang))),
+              thermer.ThermerExpanded(flex: 6, child: _buildCalculationColumn(_lang)),
+            ],
+          )
+        else ...[
+          // 58mm Stacked Layout
+          _buildCalculationColumn(_lang),
+          thermer.ThermerDivider.horizontal(),
+          _buildPaymentInfoText(_lang),
+        ],
+
+        thermer.ThermerSizedBox(height: 16),
+
+        // --- Returns ---
+        ...returnWidgets,
+
+        // --- Footer ---
+        if (business.data?.gratitudeMessage != null && business.data?.showGratitudeMsg == 1)
+          thermer.ThermerText(business.data?.gratitudeMessage ?? '',
+              textAlign: thermer.TextAlign.center, style: _commonStyle(isBold: true)),
+
+        if (business.data?.showNote == 1)
+          thermer.ThermerText('${business.data?.invoiceNoteLevel ?? _lang.note}: ${business.data?.invoiceNote}',
+              textAlign: thermer.TextAlign.center, style: _commonStyle()),
+
+        thermer.ThermerSizedBox(height: 16),
+        if (_qrLogo != null) ...[thermer.ThermerAlign(child: _qrLogo), thermer.ThermerSizedBox(height: 1)],
+        // if (business.data?.developByLink != null)
+        //   thermer.ThermerAlign(child: thermer.ThermerQRCode(data: business.data?.developByLink ?? '', size: 120)),
+
+        if (business.data?.developBy != null)
+          thermer.ThermerText('${business.data?.developByLevel ?? _lang.developedBy} ${business.data?.developBy}',
+              textAlign: thermer.TextAlign.center, style: _commonStyle()),
+
+        thermer.ThermerSizedBox(height: 200), // Cutter space
+      ],
+    );
+
+    return _layout.toUint8List();
+  }
+
+  // --- Sub-Builders ---
+
+  List<thermer.ThermerWidget> _buildInfoSection(lang.S _lang) {
+    DateTime? saleDateTime;
+
+    if (saleInvoice.saleDate != null && saleInvoice.saleDate!.isNotEmpty) {
+      saleDateTime = DateTime.tryParse(saleInvoice.saleDate!);
+    }
+
+    final formattedDate = saleDateTime != null
+        ? DateFormat('dd MMMM yyyy').format(saleDateTime) // 25 January 2026
+        : '';
+
+    final formattedTime = saleDateTime != null
+        ? DateFormat('hh:mm a').format(saleDateTime).toLowerCase() // 12:55 pm
+        : '';
+
+    final invText = '${_lang.invoice}: ${saleInvoice.invoiceNumber ?? ''}';
+    final dateText = '${_lang.date}: ${formattedDate ?? ''}';
+    final timeText = "${_lang.time}: ${formattedTime ?? ''}";
+    final nameText = '${_lang.name}: ${saleInvoice.party?.name ?? 'Guest'}';
+    final mobileText = '${_lang.mobile} ${saleInvoice.party?.phone ?? 'N/A'}';
+    final salesByText =
+        "${_lang.salesBy} ${saleInvoice.user?.role == 'shop-owner' ? _lang.admin : saleInvoice.user?.role ?? "N/A"}";
+
+    if (is58mm) {
+      // 58mm: Vertical Stack (One below another)
+      return [
+        thermer.ThermerText(
+          invText,
+          style: _commonStyle(),
+        ),
+        if (saleInvoice.saleDate != null) thermer.ThermerText(dateText, style: _commonStyle()),
+        thermer.ThermerText(nameText, style: _commonStyle()),
+        thermer.ThermerText(mobileText, style: _commonStyle()),
+        thermer.ThermerText(salesByText, style: _commonStyle()),
+      ];
+    } else {
+      // 80mm: Two columns (Side by side)
+      return [
+        // Row 1: Invoice | Date
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(invText, style: _commonStyle()),
+            if (saleInvoice.saleDate != null) thermer.ThermerText(dateText, style: _commonStyle()),
+          ],
+        ),
+        // Row 2: Name | Time
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(nameText, style: _commonStyle()),
+            thermer.ThermerText(timeText, style: _commonStyle()),
+          ],
+        ),
+        // Row 3: Mobile | Sales By
+        thermer.ThermerRow(
+          mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+          children: [
+            thermer.ThermerText(mobileText, style: _commonStyle()),
+            thermer.ThermerText(salesByText, style: _commonStyle()),
+          ],
+        ),
+      ];
+    }
+  }
+
+  List<thermer.ThermerTableRow> _buildProductRows() {
+    List<thermer.ThermerTableRow> rows = [];
+    if (saleInvoice.salesDetails == null) return rows;
+
+    for (var index = 0; index < saleInvoice.salesDetails!.length; index++) {
+      final item = saleInvoice.salesDetails![index];
+      final qty = _getProductQty(item.id ?? 0);
+      final price = item.price ?? 0;
+      final discount = item.discount ?? 0;
+      final amount = (price * qty) - (discount * qty);
+
+      // Main Row
+      rows.add(thermer.ThermerTableRow([
+        if (!is58mm) thermer.ThermerText((index + 1).toString(), style: _commonStyle()),
+        thermer.ThermerText(_getProductName(item.id ?? 0), style: _commonStyle()),
+        thermer.ThermerText(formatPointNumber(qty), textAlign: thermer.TextAlign.center, style: _commonStyle()),
+        thermer.ThermerText('$price', textAlign: thermer.TextAlign.center, style: _commonStyle()),
+        thermer.ThermerText(formatPointNumber(amount), textAlign: thermer.TextAlign.end, style: _commonStyle()),
+      ]));
+
+      // Warranty/Guarantee
+      final w = item.warrantyInfo;
+      if (w?.warrantyDuration != null) {
+        rows.add(_buildInfoRow("${lang.S.of(context).warranty} : ${w!.warrantyDuration} ${w.warrantyUnit}"));
+      }
+      if (w?.guaranteeDuration != null) {
+        rows.add(_buildInfoRow("${lang.S.of(context).guarantee} : ${w!.guaranteeDuration} ${w.guaranteeUnit}"));
+      }
+    }
+    return rows;
+  }
+
+  thermer.ThermerTableRow _buildInfoRow(String text) {
+    return thermer.ThermerTableRow([
+      if (!is58mm) thermer.ThermerText(""),
+      thermer.ThermerText(text, style: _commonStyle(fontSize: 20)),
+      thermer.ThermerText(""),
+      thermer.ThermerText(""),
+      thermer.ThermerText(""),
+    ]);
+  }
+
+  thermer.ThermerColumn _buildCalculationColumn(lang.S _lang) {
+    thermer.ThermerRow calcRow(String label, num value, {bool bold = false, bool isCurrency = true}) {
+      return thermer.ThermerRow(
+        mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+        children: [
+          thermer.ThermerText(label, style: _commonStyle(isBold: bold)),
+          thermer.ThermerText(
+            isCurrency ? formatPointNumber(value, addComma: true) : value.toString(),
+            textAlign: thermer.TextAlign.end,
+            style: _commonStyle(isBold: bold),
+          ),
+        ],
+      );
+    }
+
+    num subTotal = 0;
+    num totalDiscount = 0;
+    if (saleInvoice.salesDetails != null) {
+      for (var e in saleInvoice.salesDetails!) {
+        final q = _getProductQty(e.id ?? 0);
+        subTotal += ((e.price ?? 0) * q) - ((e.discount ?? 0) * q);
+        totalDiscount += (e.discount ?? 0) * q;
+      }
+    }
+
+    num returnDiscount = 0;
+    if (saleInvoice.salesReturns != null) {
+      for (var ret in saleInvoice.salesReturns!) {
+        for (var det in ret.salesReturnDetails ?? []) {
+          final price = saleInvoice.salesDetails
+                  ?.firstWhere((e) => e.id == det.saleDetailId, orElse: () => SalesDetails())
+                  .price ??
+              0;
+          returnDiscount += ((price * (det.returnQty ?? 0)) - (det.returnAmount ?? 0));
+        }
+      }
+    }
+
+    return thermer.ThermerColumn(
+      children: [
+        calcRow('${_lang.subTotal}: ', subTotal),
+        calcRow('${_lang.discount}: ', (saleInvoice.discountAmount ?? 0) + returnDiscount + totalDiscount),
+        calcRow("${saleInvoice.vat?.name ?? _lang.vat}: ", saleInvoice.vatAmount ?? 0, isCurrency: false),
+        calcRow('${_lang.shippingCharge}:', saleInvoice.shippingCharge ?? 0, isCurrency: false),
+        if ((saleInvoice.roundingAmount ?? 0) != 0) ...[
+          calcRow('${_lang.total}:', saleInvoice.actualTotalAmount ?? 0),
+          thermer.ThermerRow(
+            mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+            children: [
+              thermer.ThermerText('${_lang.rounding}:', style: _commonStyle()),
+              thermer.ThermerText(
+                "${!(saleInvoice.roundingAmount?.isNegative ?? true) ? '+' : ''}${formatPointNumber(saleInvoice.roundingAmount ?? 0)}",
+                textAlign: thermer.TextAlign.end,
+                style: _commonStyle(),
+              ),
+            ],
+          ),
+        ],
+        thermer.ThermerDivider.horizontal(),
+        calcRow('${_lang.totalPayable}: ', saleInvoice.totalAmount ?? 0, bold: true),
+        calcRow('${_lang.paidAmount}: ',
+            ((saleInvoice.totalAmount ?? 0) - (saleInvoice.dueAmount ?? 0)) + (saleInvoice.changeAmount ?? 0)),
+        if ((saleInvoice.dueAmount ?? 0) > 0) calcRow('${_lang.dueAmount}: ', saleInvoice.dueAmount ?? 0),
+        if ((saleInvoice.changeAmount ?? 0) > 0) calcRow('${_lang.changeAmount}: ', saleInvoice.changeAmount ?? 0),
+      ],
+    );
+  }
+
+  thermer.ThermerText _buildPaymentInfoText(lang.S _lang) {
+    List<String> labels = [];
+    if (saleInvoice.transactions != null) {
+      for (var item in saleInvoice.transactions!) {
+        String label = item.paymentType?.name ?? 'n/a';
+        if (item.transactionType == 'cash_payment') label = _lang.cash;
+        if (item.transactionType == 'cheque_payment') label = _lang.cheque;
+        if (item.transactionType == 'wallet_payment') label = _lang.wallet;
+        labels.add(label);
+      }
+    }
+    return thermer.ThermerText(
+      "${_lang.paidVia} : ${labels.join(', ')}",
+      style: _commonStyle(),
+      textAlign: is58mm ? thermer.TextAlign.center : thermer.TextAlign.start,
+    );
+  }
+
+  List<thermer.ThermerWidget> _buildReturnSection(BuildContext context) {
+    final _lang = lang.S.of(context);
+    if (saleInvoice.salesReturns?.isEmpty ?? true) return [];
+
+    List<thermer.ThermerWidget> widgets = [];
+    List<String> processedDates = [];
+    num totalReturnedAmount = 0;
+
+    for (var ret in saleInvoice.salesReturns!) {
+      final dateStr = ret.returnDate?.substring(0, 10);
+      if (dateStr != null && !processedDates.contains(dateStr)) {
+        processedDates.add(dateStr);
+        widgets.add(thermer.ThermerDivider.horizontal());
+        widgets.add(thermer.ThermerText('${_lang.retur}-$dateStr', style: _commonStyle(isBold: true)));
+      }
+
+      widgets.add(thermer.ThermerTable(
+        header: thermer.ThermerTableRow([
+          thermer.ThermerText(_lang.item, style: _commonStyle(fontSize: 22, isBold: true)),
+          thermer.ThermerText(_lang.qty,
+              textAlign: thermer.TextAlign.center, style: _commonStyle(fontSize: 22, isBold: true)),
+          thermer.ThermerText(_lang.total,
+              textAlign: thermer.TextAlign.end, style: _commonStyle(fontSize: 22, isBold: true)),
+        ]),
+        data: (ret.salesReturnDetails ?? []).map((d) {
+          totalReturnedAmount += d.returnAmount ?? 0;
+          return thermer.ThermerTableRow([
+            thermer.ThermerText(_getProductName(d.saleDetailId ?? 0), style: _commonStyle(fontSize: 22)),
+            thermer.ThermerText('${d.returnQty ?? 0}',
+                textAlign: thermer.TextAlign.center, style: _commonStyle(fontSize: 22)),
+            thermer.ThermerText('${d.returnAmount ?? 0}',
+                textAlign: thermer.TextAlign.end, style: _commonStyle(fontSize: 22)),
+          ]);
+        }).toList(),
+        cellWidths: {0: null, 1: 0.2, 2: 0.25},
+      ));
+    }
+
+    widgets.add(thermer.ThermerDivider.horizontal());
+    widgets.add(
+      thermer.ThermerRow(
+        mainAxisAlignment: thermer.ThermerMainAxisAlignment.spaceBetween,
+        children: [
+          thermer.ThermerText(_lang.returnAmount, style: _commonStyle()),
+          thermer.ThermerText(formatPointNumber(totalReturnedAmount),
+              textAlign: thermer.TextAlign.end, style: _commonStyle()),
+        ],
+      ),
+    );
+    widgets.add(thermer.ThermerSizedBox(height: 10));
+
+    return widgets;
+  }
+}

lib/service/thermal_print/src/templates/templates.dart

@@ -0,0 +1,69 @@
+// import 'dart:typed_data' show Uint8List;
+
+// import 'package:esc_pos_utils_plus/esc_pos_utils_plus.dart';
+// import 'package:flutter/material.dart';
+// import 'package:flutter_riverpod/flutter_riverpod.dart' as riverpod;
+// import 'package:image/image.dart' as img;
+// import 'package:intl/intl.dart';
+// import 'package:mobile_pos/generated/l10n.dart' as lang;
+// import 'package:mobile_pos/generated/l10n.dart';
+// import 'package:mobile_pos/model/business_info_model.dart';
+// import 'package:mobile_pos/model/sale_transaction_model.dart';
+// import '../../thermer/thermer.dart' as thermer;
+
+// // part '_purchase_invoice_template.dart';
+// part '_sale_invoice_template.dart';
+// // part '_kot_ticket_template.dart';
+// // part '_due_collection_invoice_template.dart';
+
+// abstract class ThermalInvoiceTemplateBase {
+//   ThermalInvoiceTemplateBase(this.ref);
+//   final riverpod.Ref ref;
+
+//   thermer.TextDirection get textDirection {
+//     final _rtlLang = ['ar', 'ar-bh', 'eg-ar', 'fa', 'prs', 'ps', 'ur'];
+
+//     // if (_rtlLang.contains(ref.read(GlobalContextHolder.localeProvider).languageCode)) {
+//     //   return thermer.TextDirection.rtl;
+//     // }
+
+//     return thermer.TextDirection.ltr;
+//   }
+
+//   Future<List<int>> get template;
+//   // Future<img.Image?> getNetworkImage(
+//   //   String? url, {
+//   //   int width = 100,
+//   //   int height = 100,
+//   // }) async {
+//   //   if (url == null) return null;
+
+//   //   try {
+//   //     final _response = await dio.Dio().get<List<int>>(
+//   //       url,
+//   //       options: dio.Options(responseType: dio.ResponseType.bytes),
+//   //     );
+
+//   //     final _image = img.decodeImage(Uint8List.fromList(_response.data!));
+//   //     if (_image == null) return null;
+
+//   //     return img.copyResize(
+//   //       _image,
+//   //       width: width,
+//   //       height: height,
+//   //       interpolation: img.Interpolation.average,
+//   //     );
+//   //   } catch (e) {
+//   //     return null;
+//   //   }
+//   // }
+// }
+
+// // extension ThermalPrinterPaperSizeExt  {
+// //   PaperSize get escPosSize {
+// //     return switch (this) {
+// //       ThermalPrinterPaperSize.mm582Inch => PaperSize.mm58,
+// //       ThermalPrinterPaperSize.mm803Inch => PaperSize.mm80,
+// //     };
+// //   }
+// // }