import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

// ⚠️ IMPORTANTE: Assicurati che questo file esista (generato da flutterfire configure)
import 'firebase_options.dart';

import 'global_data.dart';
import 'scelta_lato.dart';
import 'carro_attr.dart';
import 'ps.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // 1. BLOCCO INIZIALE VERTICALE
  await SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);

  // 2. INIZIALIZZAZIONE FIREBASE CON BIVIO IOS/ANDROID
  // Il controllo .isEmpty evita il crash "Duplicate App" durante il debug
  if (Firebase.apps.isEmpty) {
    await Firebase.initializeApp(
      // Questa riga gestisce automaticamente il bivio tra le chiavi Android e iOS
      // leggendole dal file firebase_options.dart
      options: DefaultFirebaseOptions.currentPlatform,
    );
  }

  _effettuaLoginAnonimo();
  runApp(const MyApp());
}

Future<void> _effettuaLoginAnonimo() async {
  try {
    if (FirebaseAuth.instance.currentUser == null) {
      await FirebaseAuth.instance.signInAnonymously();
      debugPrint("✅ Login anonimo effettuato.");
    }
  } catch (e) {
    debugPrint("⚠️ Login anonimo fallito (ritento tra 2s): $e");
    Future.delayed(const Duration(seconds: 2), _effettuaLoginAnonimo);
  }
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'La tua App CAI',
      debugShowCheckedModeBanner: false,

      // --- IMPOSTIAMO I COLORI GLOBALI DEL CALENDARIO E DELL'APP ---
      theme: ThemeData.light().copyWith(
        colorScheme: const ColorScheme.light(
          primary: Color(0xFF1565C0), // Blu (usato per i calendari)
          onPrimary: Colors.white,
          onSurface: Colors.black,
        ),
      ),

      localizationsDelegates: const [
        GlobalMaterialLocalizations.delegate,
        GlobalWidgetsLocalizations.delegate,
        GlobalCupertinoLocalizations.delegate,
      ],
      supportedLocales: const [
        Locale('it', 'IT'),
      ],

      home: const HomeScreen(),
    );
  }
}

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> with RouteAware {

  @override
  void initState() {
    super.initState();
    // Al primo avvio puliamo tutto
    _resetCompleto();
  }

  // Metodo centralizzato per reset e orientamento
  Future<void> _resetCompleto() async {
    GlobalData.reset();
    await SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
    debugPrint("🏠 Home: Dati resettati e Verticale forzato.");
  }

  @override
  Widget build(BuildContext context) {
    // Intercettiamo il "ritorno" alla home per forzare il verticale
    // (utile se si torna indietro con gesture o tasto back fisico)
    return PopScope(
      canPop: false, // La home è la root, non si esce
      child: Scaffold(
        extendBodyBehindAppBar: true,
        appBar: AppBar(
          title: const Text(
              'CAI Facile',
              style: TextStyle(fontWeight: FontWeight.w900, letterSpacing: 1.5, fontSize: 24)
          ),
          centerTitle: true,
          backgroundColor: Colors.blue.shade900.withOpacity(0.95),
          foregroundColor: Colors.white,
          elevation: 10,
          shape: const RoundedRectangleBorder(
              borderRadius: BorderRadius.vertical(bottom: Radius.circular(20))
          ),
        ),
        body: Stack(
          children: [
            // 1. Sfondo Base (Mappa)
            const Positioned.fill(child: BackgroundImage()),



            // Contenuto
            SafeArea(
              child: Center(
                child: SingleChildScrollView(
                  physics: const BouncingScrollPhysics(),
                  child: Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 25, vertical: 20),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [

                        // 1. Compila Sinistro
                        _buildButton3D(
                          context: context,
                          label: "COMPILA SINISTRO",
                          icon: Icons.assignment_outlined,
                          baseColor: Colors.blue.shade800,
                          onTap: () async {
                            // Reset esplicito prima di iniziare
                            await _resetCompleto();
                            if (context.mounted) {
                              Navigator.push(
                                  context,
                                  MaterialPageRoute(builder: (c) => const SceltaLatoScreen())
                              ).then((_) {
                                // Quando l'utente torna indietro dalla compilazione,
                                // forziamo di nuovo il reset e il verticale
                                _resetCompleto();
                              });
                            }
                          },
                        ),

                        const SizedBox(height: 25),

                        // 2. Carro Attrezzi
                        _buildButton3D(
                          context: context,
                          label: "SOS CARRO ATTREZZI",
                          icon: Icons.support_agent,
                          baseColor: Colors.red.shade800,
                          onTap: () {
                            Navigator.push(context, MaterialPageRoute(builder: (c) => const CarroAttrezziScreen()));
                          },
                        ),

                        const SizedBox(height: 25),

                        // 3. Pronto Soccorso
                        _buildButton3D(
                          context: context,
                          label: "PRONTO SOCCORSO",
                          icon: Icons.local_hospital_outlined,
                          baseColor: Colors.green.shade800,
                          onTap: () {
                            Navigator.push(context, MaterialPageRoute(builder: (c) => const ProntoSoccorsoScreen()));
                          },
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  // Widget helper per i bottoni con effetto 3D
  Widget _buildButton3D({
    required BuildContext context,
    required String label,
    required IconData icon,
    required Color baseColor,
    required VoidCallback onTap,
  }) {
    return Container(
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(color: Colors.black.withOpacity(0.4), offset: const Offset(0, 6), blurRadius: 8, spreadRadius: 1)
        ],
        gradient: LinearGradient(
          begin: Alignment.topLeft,
          end: Alignment.bottomRight,
          colors: [
            baseColor.withOpacity(0.9),
            baseColor,
            baseColor.withRed((baseColor.red - 20).clamp(0, 255))
          ],
        ),
      ),
      child: Material(
        color: Colors.transparent,
        child: InkWell(
          borderRadius: BorderRadius.circular(16),
          onTap: onTap,
          splashColor: Colors.white.withOpacity(0.2),
          child: Padding(
            padding: const EdgeInsets.symmetric(vertical: 20, horizontal: 20),
            child: Row(
              children: [
                Icon(icon, size: 32, color: Colors.white),
                const SizedBox(width: 20),
                Expanded(
                    child: Text(
                        label,
                        style: const TextStyle(
                            color: Colors.white,
                            fontWeight: FontWeight.w800,
                            fontSize: 18,
                            letterSpacing: 1.0
                        )
                    )
                ),
                Icon(Icons.arrow_forward_ios, size: 18, color: Colors.white.withOpacity(0.7)),
              ],
            ),
          ),
        ),
      ),
    );
  }
}

// Widget Sfondo
class BackgroundImage extends StatelessWidget {
  const BackgroundImage({super.key});

  @override
  Widget build(BuildContext context) {
    return Container(
      color: const Color(0xFFF0F4F8),
      child: Image.asset(
        'assets/sfondo_mappa.jpg',
        fit: BoxFit.cover,
        color: const Color(0xFFF0F4F8).withOpacity(0.6),
        colorBlendMode: BlendMode.lighten,
        errorBuilder: (c, e, s) => Container(color: Colors.grey.shade200),
      ),
    );
  }
}