generate_voucher.dart

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import 'dart:io';
import 'dart:convert';
import 'package:another_flushbar/flushbar.dart';
import 'package:connect/core/constants/assets.dart';
import 'package:connect/core/services/service_locator.dart';
import 'package:connect/core/ui/widgets/custom_snackbar.dart';
import 'package:connect/core/utils/number_conversion.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:open_filex/open_filex.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:path_provider/path_provider.dart';
 
import '../../../../../../../../../../core/api/api_client.dart';
 
Future<CollectionVoucherDocumentModel?>? fetchData(
    {required String collectionName}) async {
  try {
    final apiClient = sl<ApiClient>();
    final response = await apiClient.get(
      '',
      {},
      false,
      'https://dev-api.aidra.tech/document/collectionDocument/$collectionName',
    );
    if (response == {}) {
      return null;
    }
 
    return CollectionVoucherDocumentModel.fromJson(response);
  } catch (e) {
    return null;
  }
}
 
Future<void> generateCollectionVoucher(
  String collectionName,
  BuildContext context,
) async {
  final data = await fetchData(collectionName: collectionName);
 
  if (data == null) {
    Flushbar(
      margin: EdgeInsets.all(10),
      borderRadius: BorderRadius.circular(10),
      backgroundColor: Theme.of(context).colorScheme.error,
      message: 'Voucher generation failed. Please try again.',
      duration: Duration(seconds: 2),
    ).show(context);
    return;
  }
 
  final pdf = pw.Document();
 
  // Load custom font with Unicode support
  final fontData = await rootBundle.load('assets/fonts/notokufi_font.ttf');
  final ttf = pw.Font.ttf(fontData);
 
  final boldyFont =
      await rootBundle.load("assets/fonts/NotoKufiArabic-Bold.ttf");
  final ttf2 = pw.Font.ttf(boldyFont);
 
  // Create theme with the custom font
  final theme = pw.ThemeData.withFont(
    base: ttf,
    bold:
        ttf, // Use the same font for bold since we don't have a separate bold variant
    italic: ttf,
    boldItalic: ttf,
  );
 
  String extractName(String? productName) {
    if (productName == null || productName.isEmpty) {
      return '';
    }
 
    final Map<String, dynamic> decoded = jsonDecode(productName);
    return decoded['en_US'] ?? '';
  }
 
  final qrCode = pw.BarcodeWidget(
    barcode: pw.Barcode.qrCode(),
    data: data?.collection.name ?? '',
    width: 50,
    height: 50,
  );
 
  String _formatDate(String? dateString) {
    if (dateString == null || dateString.isEmpty) return '--';
 
    try {
      DateTime parsedDate = DateTime.parse(dateString);
      return '${parsedDate.day}/${parsedDate.month}/${parsedDate.year}';
    } catch (e) {
      return '--'; // Fallback if parsing fails
    }
  }
 
  final directorSignature = pw.Column(
    children: [
      pw.Text(
        'Driver / Collector : Driver 26',
        style: pw.TextStyle(
            font: ttf, fontSize: 10, fontWeight: pw.FontWeight.bold),
      ),
      pw.Container(
        width: 90,
        height: 90,
        child: pw.Center(
          child: pw.Image(
            pw.MemoryImage(
              (await rootBundle.load(Assets.directorSign)).buffer.asUint8List(),
            ),
            fit: pw.BoxFit.contain,
          ),
        ),
      ),
    ],
  );
 
  final collectorSignature = pw.Column(
    children: [
      pw.Text(
        'Collection Point : ${data?.collection.partnerId?.name ?? ''}',
        style: pw.TextStyle(
            font: ttf, fontSize: 10, fontWeight: pw.FontWeight.bold),
      ),
      pw.Container(
        width: 90,
        height: 90,
        child: pw.Center(
          child: pw.Image(
            pw.MemoryImage(
              (await rootBundle.load(Assets.collectorSign))
                  .buffer
                  .asUint8List(),
            ),
            fit: pw.BoxFit.contain,
          ),
        ),
      ),
    ],
  );
 
  pdf.addPage(
    pw.Page(
      theme: theme,
      pageFormat: PdfPageFormat.a4,
      //textDirection: pw.TextDirection.rtl,
      build: (context) {
        return pw.Column(
          crossAxisAlignment: pw.CrossAxisAlignment.center,
          children: [
            pw.Text(
              'Collection Voucher',
              style: pw.TextStyle(
                  font: ttf, fontSize: 20, fontWeight: pw.FontWeight.bold),
            ),
            pw.SizedBox(height: 8),
            pw.Text(
              'Document Number : ${data?.collection.name ?? ''}',
              style: pw.TextStyle(
                font: ttf,
                fontSize: 16,
                fontWeight: pw.FontWeight.normal,
                color: PdfColors.blue,
              ),
            ),
            pw.SizedBox(height: 25),
            pw.Align(
              alignment: pw.Alignment.centerLeft,
              child: pw.Column(
                crossAxisAlignment: pw.CrossAxisAlignment.start,
                children: [
                  pw.Text(
                    'Name:',
                    textDirection: pw.TextDirection.rtl,
                    style: pw.TextStyle(
                      font: ttf,
                      fontSize: 15,
                      fontWeight: pw.FontWeight.bold,
                      color: PdfColors.blue,
                    ),
                  ),
                  pw.Text(
                    data?.collection.partnerId?.name ?? '',
                    textDirection: pw.TextDirection.rtl,
                    style: pw.TextStyle(
                        font: ttf,
                        fontSize: 14,
                        fontWeight: pw.FontWeight.normal),
                  ),
                  pw.SizedBox(height: 8),
                  pw.Text(
                    'Address:',
                    style: pw.TextStyle(
                      font: ttf,
                      fontSize: 15,
                      fontWeight: pw.FontWeight.bold,
                      color: PdfColors.blue,
                    ),
                  ),
                  pw.Text(
                    data?.collection.partnerId?.street ?? '',
                    textDirection: pw.TextDirection.rtl,
                    style: pw.TextStyle(
                      font: ttf,
                      fontSize: 14,
                      fontWeight: pw.FontWeight.normal,
                    ),
                  ),
                ],
              ),
            ),
            pw.SizedBox(height: 30),
            pw.Table(
              border: pw.TableBorder.all(),
              children: [
                pw.TableRow(
                  children: [
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        'Collection Date',
                        style: pw.TextStyle(
                          font: ttf2,
                          fontWeight: pw.FontWeight.bold,
                        ),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        _formatDate(data?.collection
                            .confirmationDate), // Call function to format the date
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        'Payment Bill Ref',
                        style: pw.TextStyle(
                          font: ttf2,
                          fontWeight: pw.FontWeight.bold,
                        ),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        data?.collection.paymentBillRef ?? '',
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                  ],
                ),
                pw.TableRow(
                  children: [
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        'Collection Order Ref',
                        style: pw.TextStyle(
                          font: ttf2,
                          fontWeight: pw.FontWeight.bold,
                        ),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        data?.collection.collectionOrderRef ?? '',
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        'Payment Method',
                        style: pw.TextStyle(
                          font: ttf2,
                          fontWeight: pw.FontWeight.bold,
                        ),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      child: pw.Text(
                        'Deferred Payment',
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                  ],
                ),
              ],
            ),
            pw.SizedBox(height: 25),
            // Use custom font explicitly for table
            pw.Table(
              border: pw.TableBorder.all(),
              children: [
                // Header row
                pw.TableRow(
                  decoration: pw.BoxDecoration(color: PdfColors.grey200),
                  children: ['Product', 'Quantity Received', 'Quantity Billed']
                      .map((header) => pw.Container(
                            padding: const pw.EdgeInsets.all(8),
                            alignment: pw.Alignment.center,
                            child: pw.Text(
                              header,
                              style: pw.TextStyle(
                                font: ttf2,
                                fontWeight: pw.FontWeight.bold,
                              ),
                            ),
                          ))
                      .toList(),
                ),
                // Data row
                pw.TableRow(
                  children: [
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      alignment: pw.Alignment.centerLeft,
                      child: pw.Text(
                        extractName(data?.product),
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      alignment: pw.Alignment.centerLeft,
                      child: pw.Text(
                        '${NumberConversionService.convertAndFormatWeight(data?.quantityReceived)} ',
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                    pw.Container(
                      padding: const pw.EdgeInsets.all(8),
                      alignment: pw.Alignment.centerLeft,
                      child: pw.Text(
                        '${NumberConversionService.convertAndFormatWeight(data?.quantityBilled)} ',
                        style: pw.TextStyle(font: ttf),
                      ),
                    ),
                  ],
                ),
              ],
            ),
            pw.SizedBox(height: 30),
            pw.Row(
              mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
              children: [directorSignature, collectorSignature],
            ),
            pw.SizedBox(height: 30),
            pw.Row(
              children: [
                pw.Spacer(),
                pw.Column(children: [
                  pw.Row(
                    mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                    children: [
                      qrCode,
                      pw.SizedBox(width: 10),
                    ],
                  ),
                  pw.SizedBox(height: 10),
                  pw.Text(
                    'STRICTLY CONFIDENTIAL',
                    style: pw.TextStyle(
                      font: ttf,
                      fontSize: 8,
                      fontWeight: pw.FontWeight.normal,
                      color: const PdfColor(0.5, 0.5, 0.5),
                    ),
                  ),
                ])
              ],
            ),
          ],
        );
      },
    ),
  );
 
  final output = await getTemporaryDirectory();
  final file = File('${output.path}/collection_voucher_document.pdf');
  await file.writeAsBytes(await pdf.save());
  OpenFilex.open(file.path);
}
 
class CollectionVoucherDocumentModel {
  final Collection collection;
  final double? priceUnit;
  final String? product;
  final double? quantityBilled;
  final double? quantityReceived;
 
  CollectionVoucherDocumentModel({
    required this.collection,
    required this.priceUnit,
    required this.product,
    required this.quantityBilled,
    required this.quantityReceived,
  });
 
  factory CollectionVoucherDocumentModel.fromJson(Map<String, dynamic> json) {
    return CollectionVoucherDocumentModel(
      collection: Collection.fromJson(json['collection']),
      priceUnit: json['priceUnit']?.toDouble() ?? 0.0,
      product: json['product'] ?? '',
      quantityBilled: json['quantityBilled']?.toDouble() ?? 0,
      quantityReceived: json['quantityReceived']?.toDouble() ?? 0,
    );
  }
 
  Map<String, dynamic> toJson() {
    return {
      'collection': collection.toJson(),
      'priceUnit': priceUnit,
      'product': product,
      'quantityBilled': quantityBilled,
      'quantityReceived': quantityReceived,
    };
  }
}
 
class Collection {
  final String? billStatus;
  final String? collectionConfirmRef;
  final String? collectionOrderRef;
  final String? confirmationDate;
  final int? id;
  final String? name;
  final Partner? partnerId;
  final String? paymentBillRef;
  final String? receiptStatus;
  final String? status;
 
  Collection({
    required this.billStatus,
    required this.collectionConfirmRef,
    required this.collectionOrderRef,
    required this.confirmationDate,
    required this.id,
    required this.name,
    required this.partnerId,
    required this.paymentBillRef,
    required this.receiptStatus,
    required this.status,
  });
 
  factory Collection.fromJson(Map<String, dynamic> json) {
    return Collection(
      billStatus: json['billStatus'] ?? '',
      collectionConfirmRef: json['collectionConfirmRef'] ?? '',
      collectionOrderRef: json['collectionOrderRef'] ?? '',
      confirmationDate: json['confirmationDate'] ?? '',
      id: json['id'] ?? 0,
      name: json['name'] ?? '',
      partnerId: Partner.fromJson(json['partnerId']),
      paymentBillRef: json['paymentBillRef'] ?? '',
      receiptStatus: json['receiptStatus'] ?? '',
      status: json['status'] ?? '',
    );
  }
 
  Map<String, dynamic> toJson() {
    return {
      'billStatus': billStatus,
      'collectionConfirmRef': collectionConfirmRef,
      'collectionOrderRef': collectionOrderRef,
      'confirmationDate': confirmationDate,
      'id': id,
      'name': name,
      'partnerId': partnerId?.toJson(),
      'paymentBillRef': paymentBillRef,
      'receiptStatus': receiptStatus,
      'status': status,
    };
  }
}
 
class Partner {
  final String? contactName;
  final int? id;
  final bool? isCompany;
  final String? name;
  final int? parentId;
  final String? partnerLatitude;
  final String? partnerLongitude;
  final String? street;
 
  Partner({
    required this.contactName,
    required this.id,
    required this.isCompany,
    required this.name,
    required this.parentId,
    required this.partnerLatitude,
    required this.partnerLongitude,
    required this.street,
  });
 
  factory Partner.fromJson(Map<String, dynamic> json) {
    return Partner(
      contactName: json['contactName'] ?? '',
      id: json['id'] ?? 0,
      isCompany: json['isCompany'] ?? false,
      name: json['name'] ?? '',
      parentId: json['parentId'] ?? 0,
      partnerLatitude: json['partnerLatitude'] ?? '',
      partnerLongitude: json['partnerLongitude'] ?? '',
      street: json['street'] ?? '',
    );
  }
 
  Map<String, dynamic> toJson() {
    return {
      'contactName': contactName,
      'id': id,
      'isCompany': isCompany,
      'name': name,
      'parentId': parentId,
      'partnerLatitude': partnerLatitude,
      'partnerLongitude': partnerLongitude,
      'street': street,
    };
  }
}