siempre_informao/lib/detail_page.dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

class DetailPage extends StatefulWidget {
  final String title;
  final String texto;
  final String categoria;
  final String imagePath;

  const DetailPage({
    super.key,
    required this.title,
    required this.texto,
    required this.categoria,
    this.imagePath = 'assets/icons/default_icon.jpg',
  });

  @override
  State<DetailPage> createState() => _DetailPageState();
}

class _DetailPageState extends State<DetailPage> {
  bool _isFavorite = false; // Inicializado con valor por defecto

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

  Future<void> _loadFavorite() async {
    final prefs = await SharedPreferences.getInstance();
    setState(() {
      _isFavorite = prefs.getBool('fav_${widget.title}') ?? false;
    });
  }

  Future<void> _toggleFavorite() async {
    final prefs = await SharedPreferences.getInstance();
    setState(() {
      _isFavorite = !_isFavorite;
      prefs.setBool('fav_${widget.title}', _isFavorite);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        flexibleSpace: Padding(
          padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top - 20),
          child: Image.asset('assets/header_image.png', fit: BoxFit.cover),
        ),
        toolbarHeight: MediaQuery.of(context).size.height * 0.19,
        title: Text(
          widget.categoria,
          style: const TextStyle(color: Colors.white, fontSize: 16),
        ),
        actions: [
          IconButton(
            icon: Icon(
              _isFavorite ? Icons.favorite : Icons.favorite_border,
              color: _isFavorite ? Colors.red : Colors.white,
            ),
            onPressed: _toggleFavorite,
          ),
        ],
      ),
      body: Container(
        decoration: const BoxDecoration(color: Color.fromARGB(255, 254, 242, 221)),
        child: Padding(
          padding: const EdgeInsets.all(16.0),
          child: SingleChildScrollView(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Row(
                  children: [
                    Container(
                      width: 80,
                      height: 80,
                      decoration: BoxDecoration(
                        color: Colors.white,
                        borderRadius: BorderRadius.circular(40),
                      ),
                      child: ClipRRect(
                        borderRadius: BorderRadius.circular(40),
                        child: Image.asset(
                          widget.imagePath,
                          fit: BoxFit.cover,
                        ),
                      ),
                    ),
                    const SizedBox(width: 16),
                    Expanded(
                      child: Text(
                        widget.title,
                        style: const TextStyle(
                          fontSize: 20,
                          fontWeight: FontWeight.bold,
                          color: Colors.black87,
                        ),
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 20),
                Container(
                  padding: const EdgeInsets.all(16),
                  decoration: BoxDecoration(
                    color: Colors.white,
                    borderRadius: BorderRadius.circular(12),
                  ),
                  child: Text(
                    widget.texto,
                    style: const TextStyle(fontSize: 16, height: 1.5),
                    textAlign: TextAlign.justify,
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}