import 'dart:io';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

class WebViewer extends StatefulWidget {
  final String book_id;

  const WebViewer({super.key, required this.book_id});

  @override
  State<WebViewer> createState() => _WebViewerState();
}

class _WebViewerState extends State<WebViewer> {
  late final WebViewController _controller;
  bool _loading = true;

  final String baseUrl =
      "http://192.168.99.115:8080/#fmt=EPUB&mode=read_book&book_id=";

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

    final fullUrl = baseUrl + widget.book_id;

    // Controller novo (API 4.x)
    _controller = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setUserAgent("Mozilla/5.0 (Mobile; Flutter)")
      ..setNavigationDelegate(
        NavigationDelegate(
          onPageFinished: (_) {
            setState(() {
              _loading = false;
            });
          },
        ),
      )
      ..loadRequest(Uri.parse(fullUrl));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Leitor Online"),
        backgroundColor: Colors.cyanAccent,
        foregroundColor: Colors.black,
      ),
      body: Stack(
        children: [
          WebViewWidget(controller: _controller),
          if (_loading)
            const Center(
              child: CircularProgressIndicator(),
            ),
        ],
      ),
    );
  }
}