apskel-pos-flutter/lib/core/utils/revenue_invoice.dart

import 'dart:io';
import 'dart:developer';

import 'package:enaklo_pos/core/extensions/date_time_ext.dart';
import 'package:enaklo_pos/core/extensions/int_ext.dart';
import 'package:enaklo_pos/data/models/response/summary_response_model.dart';
import 'package:flutter/services.dart';

import 'package:enaklo_pos/core/utils/helper_pdf_service.dart';
import 'package:pdf/widgets.dart';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'package:flutter/foundation.dart';

class RevenueInvoice {
  static late Font ttf;
  static Future<File> generate(
    SummaryModel summaryModel,
    String searchDateFormatted,
  ) async {
    try {
      log("Starting PDF generation for summary report");
      log("Summary model: ${summaryModel.toMap()}");
      log("Search date formatted: $searchDateFormatted");

      final pdf = Document();
      log("PDF document created");

      // Load logo image
      log("Loading logo image...");
      final ByteData dataImage =
          await rootBundle.load('assets/images/logo.png');
      final Uint8List bytes = dataImage.buffer.asUint8List();
      final image = pw.MemoryImage(bytes);
      log("Logo image loaded successfully, size: ${bytes.length} bytes");

      log("Adding page to PDF...");
      pdf.addPage(
        MultiPage(
          build: (context) => [
            buildHeader(summaryModel, image, searchDateFormatted),
            SizedBox(height: 1 * PdfPageFormat.cm),
            buildTotal(summaryModel),
          ],
          footer: (context) => buildFooter(summaryModel),
        ),
      );
      log("PDF page added successfully");

      log("Saving PDF document...");
      return HelperPdfService.saveDocument(
        name:
            'Apskel POS | Summary Sales Report | ${DateTime.now().millisecondsSinceEpoch}.pdf',
        pdf: pdf,
      );
    } catch (e) {
      log("Error generating PDF: $e");
      log("Error stack trace: ${StackTrace.current}");
      return Future.error("Failed to generate PDF: $e");
    }
  }

  static Widget buildHeader(
    SummaryModel invoice,
    MemoryImage image,
    String searchDateFormatted,
  ) =>
      Row(mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [
        Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            SizedBox(height: 1 * PdfPageFormat.cm),
            Text('Apskel POS | Summary Sales Report',
                style: TextStyle(
                  fontSize: 20,
                  fontWeight: FontWeight.bold,
                )),
            SizedBox(height: 0.2 * PdfPageFormat.cm),
            Text(
              "Data: $searchDateFormatted",
            ),
            Text(
              'Created At: ${DateTime.now().toFormattedDate3()}',
            ),
          ],
        ),
        Image(
          image,
          width: 80.0,
          height: 80.0,
          fit: BoxFit.fill,
        ),
      ]);

  static Widget buildTotal(SummaryModel summaryModel) {
    log("Building total section with summary model: ${summaryModel.toMap()}");

    // Helper function to safely parse string to int
    int safeParseInt(String? value) {
      if (value == null || value.isEmpty) return 0;
      try {
        return int.parse(value.replaceAll('.00', ''));
      } catch (e) {
        log("Error parsing value '$value' to int: $e");
        return 0;
      }
    }

    return Container(
      width: double.infinity,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          buildText(
            title: 'Revenue',
            value: safeParseInt(summaryModel.totalRevenue).currencyFormatRp,
            unite: true,
          ),
          Divider(),
          buildText(
            title: 'Sub Total',
            titleStyle: TextStyle(fontWeight: FontWeight.normal),
            value: safeParseInt(summaryModel.totalSubtotal).currencyFormatRp,
            unite: true,
          ),
          buildText(
            title: 'Discount',
            titleStyle: TextStyle(fontWeight: FontWeight.normal),
            value:
                "- ${safeParseInt(summaryModel.totalDiscount).currencyFormatRp}",
            unite: true,
            textStyle: TextStyle(
              color: PdfColor.fromHex('#FF0000'),
              fontWeight: FontWeight.bold,
            ),
          ),
          buildText(
            title: 'Tax',
            titleStyle: TextStyle(fontWeight: FontWeight.normal),
            value: "- ${safeParseInt(summaryModel.totalTax).currencyFormatRp}",
            textStyle: TextStyle(
              color: PdfColor.fromHex('#FF0000'),
              fontWeight: FontWeight.bold,
            ),
            unite: true,
          ),
          buildText(
            title: 'Service Charge',
            titleStyle: TextStyle(
              fontWeight: FontWeight.normal,
            ),
            value:
                safeParseInt(summaryModel.totalServiceCharge).currencyFormatRp,
            unite: true,
          ),
          Divider(),
          buildText(
            title: 'Total ',
            titleStyle: TextStyle(
              fontSize: 14,
              fontWeight: FontWeight.bold,
            ),
            value: (summaryModel.total ?? 0).currencyFormatRp,
            unite: true,
          ),
          SizedBox(height: 2 * PdfPageFormat.mm),
          Container(height: 1, color: PdfColors.grey400),
          SizedBox(height: 0.5 * PdfPageFormat.mm),
          Container(height: 1, color: PdfColors.grey400),
        ],
      ),
    );
  }

  static Widget buildFooter(SummaryModel summaryModel) => Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Divider(),
          SizedBox(height: 2 * PdfPageFormat.mm),
          buildSimpleText(
              title: 'Address',
              value:
                  'Jalan Melati No. 12, Mranggen, Demak, Central Java, 89568'),
          SizedBox(height: 1 * PdfPageFormat.mm),
        ],
      );

  static buildSimpleText({
    required String title,
    required String value,
  }) {
    final style = TextStyle(fontWeight: FontWeight.bold);

    return Row(
      mainAxisSize: MainAxisSize.min,
      crossAxisAlignment: pw.CrossAxisAlignment.end,
      children: [
        Text(title, style: style),
        SizedBox(width: 2 * PdfPageFormat.mm),
        Text(value),
      ],
    );
  }

  static buildText({
    required String title,
    required String value,
    double width = double.infinity,
    TextStyle? titleStyle,
    TextStyle? textStyle,
    bool unite = false,
  }) {
    final style = titleStyle ?? TextStyle(fontWeight: FontWeight.bold);
    final style2 = textStyle ?? TextStyle(fontWeight: FontWeight.bold);

    return Container(
      width: width,
      child: Row(
        children: [
          Expanded(child: Text(title, style: style)),
          Text(value, style: style2),
        ],
      ),
    );
  }
}