import 'package:flutter/services.dart';
import 'package:manager_api_new/api.dart';
import 'dart:convert';
import 'package:pdf/pdf.dart';
import 'package:pdf/widgets.dart' as pw;
import 'dart:html' as html;

class PDFHelper {
  static downloadPDF(List<SectionDTO> sections) async {
    var sectionsArticle = sections.where((section) => section.type == SectionType.Article || section.type == SectionType.Quizz); // TODO HERE Support more section types
    if(sectionsArticle.length > 0) {
      //final font = await rootBundle.load("fonts/OpenSans-Medium.ttf");
      //Uint8List byteData = new File("fonts/OpenSans-Medium.ttf").readAsBytesSync();
      //ByteData font = ByteData.view(byteData.buffer);
      //final ttf = pw.Font.ttf(font);
      final pdf = pw.Document();
          pdf.addPage(pw.MultiPage(
              pageFormat: PdfPageFormat.a4,
              build: (pw.Context context) {
                return <pw.Widget> [
                  for(var section in sectionsArticle)
                    pw.Center(
                      child:
                        pw.Column(
                          children: [
                            pw.Text(section.label!.replaceAll(RegExp("[^A-Za-z0-9---():!éàèëêäâç' ]"), '')), //style: pw.TextStyle(font: ttf, fontSize: 30)
                            pw.Padding(padding: const pw.EdgeInsets.only(top: 20)),
                            pw.BarcodeWidget(
                              data: section.id!,
                              width: 150,
                              height: 150,
                              barcode: pw.Barcode.qrCode(),
                              drawText: false,
                            ),
                            pw.Padding(padding: const pw.EdgeInsets.only(bottom: 30)),
                          ]
                        )
                    )
                  ];
              }));

          /*pdf.addPage(pw.Page(
              pageFormat: PdfPageFormat.a4,
              build: (pw.Context context) {
                return
                  pw.Center(
                      child: pw.Column(
                        children: [
                          pw.Text(section.label, style: pw.TextStyle(font: ttf, fontSize: 30)),
                          pw.Padding(padding: const pw.EdgeInsets.only(top: 10)),
                          pw.BarcodeWidget(
                            data: section.id,
                            width: 150,
                            height: 150,
                            barcode: pw.Barcode.qrCode(),
                            drawText: false,
                          ),
                        ],
                      )
                  );
              }));*/



      var test = await pdf.save();
      final content = base64Encode(test);
      final fileName = sectionsArticle.length > 1 ? 'QRCodes' : sectionsArticle.first.label;
      final anchor = html.AnchorElement(
          href: "data:application/octet-stream;charset=utf-16le;base64,$content")
        ..setAttribute("download", '$fileName.pdf')
        ..click();
    }
  }
}