conalep_pos_flutter/lib/views/venta/venta_ticket.dart

import 'package:intl/intl.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:printing/printing.dart';
import '../../models/models.dart';
import 'package:spelling_number/spelling_number.dart';

String toTitleCase(String text) {
  if (text.isEmpty) return text;
  return text.split(' ').map((word) {
    if (word.isNotEmpty) {
      return word[0].toUpperCase() + word.substring(1).toLowerCase();
    }
    return '';
  }).join(' ');
}

class VentaTicket {
  static Future<void> imprimirResumenPedidos(
      List<Pedido> pedidosDelDia, DateTime fecha) async {
    final pdf = pw.Document();
    String formattedDate = DateFormat('dd-MM-yyyy').format(fecha);

    final pedidosNoCancelados =
        pedidosDelDia.where((p) => p.estatus != "CANCELADO").toList();
    final pedidosCancelados =
        pedidosDelDia.where((p) => p.estatus == "CANCELADO").toList();

    double totalNoCancelados =
        pedidosNoCancelados.fold(0, (sum, p) => sum + (p.totalPedido ?? 0));
    double totalCancelados =
        pedidosCancelados.fold(0, (sum, p) => sum + (p.totalPedido ?? 0));

    double totalEfectivo = pedidosNoCancelados.fold(
        0.0, (sum, p) => sum + (p.cantEfectivo ?? 0.0));
    double totalTarjeta =
        pedidosNoCancelados.fold(0.0, (sum, p) => sum + (p.cantTarjeta ?? 0.0));
    double totalTransferencia = pedidosNoCancelados.fold(
        0.0, (sum, p) => sum + (p.cantTransferencia ?? 0.0));

    double totalSinCambio = totalEfectivo + totalTarjeta + totalTransferencia;
    double cambio = totalSinCambio - totalNoCancelados;

    final spelling = SpellingNumber(lang: 'es');
    String totalEnLetras = toTitleCase(spelling.convert(totalNoCancelados));

    final numberFormat = NumberFormat('#,##0.00', 'en_US');
    String formattedTotalNoCancelados = numberFormat.format(totalNoCancelados);
    String formattedTotalCancelados = numberFormat.format(totalCancelados);
    String formattedTotalEfectivo = numberFormat.format(totalEfectivo);
    String formattedTotalTarjeta = numberFormat.format(totalTarjeta);
    String formattedTotalTransferencia =
        numberFormat.format(totalTransferencia);
    String formattedCambio = numberFormat.format(cambio);

    int centavos =
        ((totalNoCancelados - totalNoCancelados.floor()) * 100).round();
    String centavosEnLetras = centavos.toString().padLeft(2, '0') + "/100 M.N.";

    pdf.addPage(pw.Page(
        pageFormat: PdfPageFormat.roll57,
        build: (pw.Context context) {
          return pw.Column(
            crossAxisAlignment: pw.CrossAxisAlignment.start,
            children: [
              pw.Padding(
                padding: pw.EdgeInsets.only(bottom: 10),
                child: pw.Text('Pedidos del día: $formattedDate',
                    style: pw.TextStyle(
                        fontWeight: pw.FontWeight.bold, fontSize: 12)),
              ),
              pw.Padding(
                padding: const pw.EdgeInsets.only(right: 15),
                child: pw.Text("Pedidos Completados:",
                    style: pw.TextStyle(
                        fontWeight: pw.FontWeight.bold, fontSize: 10)),
              ),
              ...pedidosNoCancelados.map((pedido) {
                return pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child: pw.Row(
                    mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                    children: [
                      pw.Text("Folio: ${pedido.folio}",
                          style: pw.TextStyle(fontSize: 10)),
                      pw.Text("\$${pedido.totalPedido?.toStringAsFixed(2)}",
                          style: pw.TextStyle(fontSize: 10)),
                    ],
                  ),
                );
              }).toList(),
              pw.Divider(),
              pw.Padding(
                padding: const pw.EdgeInsets.only(right: 15),
                child: pw.Column(
                  crossAxisAlignment: pw.CrossAxisAlignment.start,
                  children: [
                    if (totalTarjeta > 0)
                      pw.Text("- Total en Tarjeta: \$${formattedTotalTarjeta}",
                          style: pw.TextStyle(
                              fontWeight: pw.FontWeight.bold, fontSize: 9.5)),
                    if (totalTransferencia > 0)
                      pw.Text(
                          "- Total en Transferencia: \$${formattedTotalTransferencia}",
                          style: pw.TextStyle(
                              fontWeight: pw.FontWeight.bold, fontSize: 9.5)),
                    if (totalEfectivo > 0)
                      pw.Text(
                          "- Total en Efectivo: \$${formattedTotalEfectivo}",
                          style: pw.TextStyle(
                              fontWeight: pw.FontWeight.bold, fontSize: 9.5)),
                    if (cambio > 0)
                      pw.Text("- Cambio Entregado: \$${formattedCambio}",
                          style: pw.TextStyle(
                              fontWeight: pw.FontWeight.bold, fontSize: 9.5)),
                    pw.Text("- Total General: \$${formattedTotalNoCancelados}",
                        style: pw.TextStyle(
                            fontWeight: pw.FontWeight.bold, fontSize: 9.5)),
                    pw.Text("Son: $totalEnLetras Pesos $centavosEnLetras",
                        style: pw.TextStyle(fontSize: 10))
                  ],
                ),
              ),
              pw.SizedBox(height: 10),
              if (pedidosCancelados.isNotEmpty) ...[
                pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child: pw.Text("Pedidos Cancelados:",
                      style: pw.TextStyle(
                          fontWeight: pw.FontWeight.bold, fontSize: 10)),
                ),
                ...pedidosCancelados.map((pedido) {
                  return pw.Padding(
                    padding: const pw.EdgeInsets.only(right: 15),
                    child: pw.Row(
                      mainAxisAlignment: pw.MainAxisAlignment.spaceBetween,
                      children: [
                        pw.Text("Folio: ${pedido.folio} (Cancelado)",
                            style: pw.TextStyle(fontSize: 10)),
                        pw.Text("\$${pedido.totalPedido?.toStringAsFixed(2)}",
                            style: pw.TextStyle(fontSize: 10)),
                      ],
                    ),
                  );
                }).toList(),
                pw.Divider(),
                pw.Padding(
                  padding: const pw.EdgeInsets.only(right: 15),
                  child: pw.Text(
                      "- Total Cancelados: \$${formattedTotalCancelados}",
                      style: pw.TextStyle(
                          fontWeight: pw.FontWeight.bold, fontSize: 11)),
                ),
              ],
              pw.SizedBox(height: 40),
              pw.Text('.', style: pw.TextStyle(fontSize: 1)),
            ],
          );
        }));

    await Printing.layoutPdf(
        onLayout: (PdfPageFormat format) async => pdf.save());
  }
}