joshi_papas_app/lib/views/pedido/pedido_ticket.dart

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import '../../models/models.dart';
import 'package:printing/printing.dart';
import 'package:flutter/services.dart' show rootBundle;

Future<void> imprimirTicketsJuntos(Pedido pedido) async {
  final pdf = pw.Document();
  final image = pw.MemoryImage(
    (await rootBundle.load('assets/JoshiLogo-BN.png')).buffer.asUint8List(),
  );

  pdf.addPage(
    generarPaginaPrimerTicket(pedido, image),
  );

  pdf.addPage(
    generarPaginaSegundoTicket(pedido),
  );

  await printPdf(Uint8List.fromList(await pdf.save()));
}

pw.Page generarPaginaPrimerTicket(Pedido pedido, pw.MemoryImage image) {
  final numberFormat = NumberFormat('#,##0.00', 'es_MX');

  return pw.Page(
      pageFormat: PdfPageFormat.roll57,
      build: (pw.Context context) {
        double total = 0;

        final productList = pedido.productos
            .map(
              (producto) {
                final productPrice =
                    double.parse(producto.producto?.precio ?? '0');
                final productTotal = productPrice * (producto.cantidad ?? 1);

                final toppingsList = producto.toppings.where((topping) {
                  final toppingPrice =
                      double.parse(topping.topping?.precio ?? '0');
                  return toppingPrice > 0;
                }).map((topping) {
                  final toppingPrice =
                      double.parse(topping.topping?.precio ?? '0');
                  total += toppingPrice * (producto.cantidad ?? 1);

                  return pw.Row(
                    children: [
                      pw.Text(
                          '- ${topping.topping?.nombre ?? "Topping no especificado"}',
                          style: const pw.TextStyle(fontSize: 7)),
                      pw.Spacer(),
                      pw.Text('\$${numberFormat.format(toppingPrice)}',
                          style: const pw.TextStyle(fontSize: 7)),
                    ],
                  );
                }).toList();

                total += productTotal;

                return [
                  pw.Row(
                    mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                    children: [
                      pw.Expanded(
                        flex: 2,
                        child: pw.Text(
                            producto.producto?.nombre ??
                                "Producto no especificado",
                            style: const pw.TextStyle(fontSize: 7)),
                      ),
                      pw.Expanded(
                        flex: 1,
                        child: pw.Text('x${producto.cantidad}',
                            style: const pw.TextStyle(fontSize: 7)),
                      ),
                      pw.Padding(
                        padding: pw.EdgeInsets.only(right: 2),
                        child: pw.Expanded(
                          flex: 1,
                          child: pw.Text(
                              '\$${numberFormat.format(productPrice)}',
                              style: const pw.TextStyle(fontSize: 8)),
                        ),
                      )
                    ],
                  ),
                  ...toppingsList,
                ];
              },
            )
            .expand((e) => e)
            .toList();

        return pw.Column(
            crossAxisAlignment: pw.CrossAxisAlignment.center,
            children: [
              pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child:
                      pw.Center(child: pw.Image(image, width: 50, height: 50))),
              pw.SizedBox(height: 10),
              pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child: pw.Column(children: [
                    pw.Padding(
                        padding: pw.EdgeInsets.only(left: 10),
                        child: pw.Text('Joshi Papas Tu Sabor tu Estilo',
                            style: pw.TextStyle(
                                fontSize: 12, fontWeight: pw.FontWeight.bold))),
                    pw.SizedBox(height: 10),
                    pw.Text('Fecha: ${pedido.peticion}',
                        style: const pw.TextStyle(fontSize: 9)),
                    pw.Text('JoshiPapas',
                        style: const pw.TextStyle(fontSize: 9)),
                    pw.Text('Chihuahua',
                        style: const pw.TextStyle(fontSize: 9)),
                  ])),
              pw.SizedBox(height: 10),
              pw.Text('Pedido: ${pedido.folio}',
                  style: pw.TextStyle(
                      fontWeight: pw.FontWeight.bold, fontSize: 10)),
              pw.SizedBox(height: 10),
              pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 20),
                  child: pw.Column(children: productList)),
              pw.Divider(),
              pw.Row(
                mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                children: [
                  pw.Text('Total:',
                      style: pw.TextStyle(
                          fontWeight: pw.FontWeight.bold, fontSize: 9)),
                  pw.Padding(
                    padding: const pw.EdgeInsets.only(right: 30),
                    child: pw.Text('\$${numberFormat.format(total)}',
                        style: pw.TextStyle(
                            fontWeight: pw.FontWeight.bold, fontSize: 9)),
                  ),
                ],
              ),
              pw.SizedBox(height: 5),
              pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child: pw.Text('¡GRACIAS POR SU COMPRA!',
                      style: pw.TextStyle(
                          fontSize: 8, fontWeight: pw.FontWeight.bold))),
              pw.Divider(),
              pw.SizedBox(height: 20),
              pw.Text('.', style: pw.TextStyle(fontSize: 1)),
            ]);
      });
}

pw.Page generarPaginaSegundoTicket(Pedido pedido) {
  return pw.Page(
      pageFormat: PdfPageFormat.roll57,
      build: (pw.Context context) {
        List<pw.Widget> content = [
          pw.SizedBox(height: 20),
          pw.Text('.', style: pw.TextStyle(fontSize: 1)),
          pw.Padding(
              padding: const pw.EdgeInsets.only(right: 15),
              child: pw.Text('Fecha: ${pedido.peticion}',
                  style: pw.TextStyle(
                      fontSize: 9, fontWeight: pw.FontWeight.bold))),
          pw.SizedBox(height: 5),
          pw.Text('Pedido: ${pedido.folio}',
              style: pw.TextStyle(fontWeight: pw.FontWeight.bold, fontSize: 9)),
          pw.SizedBox(height: 10),
          pw.Text('Cliente: ${pedido.nombreCliente}',
              style: pw.TextStyle(fontWeight: pw.FontWeight.bold, fontSize: 9)),
          pw.SizedBox(height: 10),
        ];

        content.addAll(pedido.productos
            .map((producto) {
              final productPrice =
                  double.parse(producto.producto?.precio ?? '0');
              final productTotal = productPrice * (producto.cantidad ?? 1);

              final toppingsList = producto.toppings.map((topping) {
                return pw.Row(
                  children: [
                    pw.Text(
                        '-${topping.topping?.nombre ?? "Topping no especificado"}',
                        style: const pw.TextStyle(fontSize: 7)),
                  ],
                );
              }).toList();

              return [
                pw.Row(
                  mainAxisAlignment: pw.MainAxisAlignment.start,
                  children: [
                    pw.Expanded(
                      flex: 3,
                      child: pw.Text(
                          producto.producto?.nombre ??
                              "Producto no especificado",
                          style: const pw.TextStyle(fontSize: 9)),
                    ),
                    pw.Expanded(
                      flex: 1,
                      child: pw.Text('x${producto.cantidad}',
                          style: const pw.TextStyle(fontSize: 9)),
                    ),
                  ],
                ),
                ...toppingsList,
              ];
            })
            .expand((e) => e)
            .toList());

        if (pedido.comentarios != null && pedido.comentarios!.isNotEmpty) {
          content.add(pw.SizedBox(height: 10));
          content.add(pw.Text('Comentarios:',
              style:
                  pw.TextStyle(fontWeight: pw.FontWeight.bold, fontSize: 9)));
          content.add(pw.Padding(
            padding: const pw.EdgeInsets.only(right: 15),
            child: pw.Text(pedido.comentarios!,
                style: const pw.TextStyle(fontSize: 9)),
          ));
          content.add(pw.Text('.', style: pw.TextStyle(fontSize: 1)));
          content.add(pw.SizedBox(height: 20));
          content.add(pw.Text('.', style: pw.TextStyle(fontSize: 1)));
        }

        content.add(pw.Text('.', style: pw.TextStyle(fontSize: 1)));
        return pw.Column(
            crossAxisAlignment: pw.CrossAxisAlignment.center,
            children: content);
      });
}

Future<void> printPdf(Uint8List pdfBytes) async {
  await Printing.layoutPdf(
    onLayout: (PdfPageFormat format) => pdfBytes,
  );
}