import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:flutter_pdfview/flutter_pdfview.dart';
import 'package:path_provider/path_provider.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PDF Viewer Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: PDFViewerPage(),
    );
  }
}

class PDFViewerPage extends StatefulWidget {
  @override
  _PDFViewerPageState createState() => _PDFViewerPageState();
}

class _PDFViewerPageState extends State<PDFViewerPage> {
  String? pdfPath;

  @override
  void initState() {
    super.initState();
    _loadPDF();
  }

  Future<void> _loadPDF() async {
    final path = await getLocalPDFPath();
    setState(() {
      pdfPath = path;
    });
  }

  Future<String> getLocalPDFPath() async {
    final dir = await getTemporaryDirectory();
    final filePath = '${dir.path}/sample.pdf';

    if (!File(filePath).existsSync()) {
      final byteData = await rootBundle.load('assets/sample.pdf');
      final file = File(filePath);
      await file.writeAsBytes(byteData.buffer.asUint8List());
    }

    return filePath;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("PDF Viewer"),
      ),
      body: pdfPath == null
          ? Center(child: CircularProgressIndicator())
          : PDFView(
        filePath: pdfPath!,
        enableSwipe: true,
        swipeHorizontal: true,
        autoSpacing: false,
        pageFling: false,
        onRender: (_pages) {
          print("PDF Rendered with $_pages pages");
        },
        onError: (error) {
          print("Error while rendering PDF: $error");
        },
        onPageError: (page, error) {
          print("Error on page $page: $error");
        },
        onViewCreated: (PDFViewController pdfViewController) {
          print("PDF View Controller initialized");
        },
      ),
    );
  }
}