me.elcaju/lib/screens/1_splash/splash_screen.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import '../../core/constants/colors.dart';
import '../../core/constants/dimensions.dart';
import '../../widgets/common/gradient_background.dart';
import '../../providers/settings_provider.dart';
import '../../providers/wallet_provider.dart';
import '../2_onboarding/welcome_screen.dart';
import '../3_home/home_screen.dart';

/// Splash Screen de El Caju
/// Inicializa los providers y redirige según el estado del wallet.
class SplashScreen extends StatefulWidget {
  const SplashScreen({super.key});

  @override
  State<SplashScreen> createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _fadeAnimation;
  String? _errorMessage;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: const Duration(milliseconds: 1200),
      vsync: this,
    );

    _fadeAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
      CurvedAnimation(parent: _controller, curve: Curves.easeOut),
    );

    _controller.forward();

    // Inicializar la app
    _initializeApp();
  }

  Future<void> _initializeApp() async {
    try {
      final settingsProvider = context.read<SettingsProvider>();
      final walletProvider = context.read<WalletProvider>();

      // Inicializar settings (cargar preferencias)
      await settingsProvider.initialize();

      // Esperar mínimo 2 segundos para mostrar splash
      await Future.delayed(const Duration(milliseconds: 2000));

      if (!mounted) return;

      // Verificar si ya existe un wallet
      if (settingsProvider.hasWallet) {
        // Cargar mnemonic e inicializar wallet
        final mnemonic = await settingsProvider.getMnemonic();

        if (mnemonic != null && mnemonic.isNotEmpty) {
          await walletProvider.initialize(mnemonic);

          if (!mounted) return;

          // Ir al Home
          _navigateTo(const HomeScreen());
        } else {
          // Error: hasWallet=true pero sin mnemonic
          // Esto no debería pasar, pero por si acaso
          _navigateTo(const WelcomeScreen());
        }
      } else {
        // No hay wallet, ir al onboarding
        _navigateTo(const WelcomeScreen());
      }
    } catch (e) {
      // Mostrar error pero permitir continuar al onboarding
      debugPrint('Error al inicializar: $e');
      setState(() {
        _errorMessage = e.toString();
      });

      // Esperar y continuar al onboarding
      await Future.delayed(const Duration(seconds: 2));
      if (mounted) {
        _navigateTo(const WelcomeScreen());
      }
    }
  }

  void _navigateTo(Widget screen) {
    Navigator.pushReplacement(
      context,
      PageRouteBuilder(
        pageBuilder: (context, animation, secondaryAnimation) => screen,
        transitionsBuilder: (context, animation, secondaryAnimation, child) {
          return FadeTransition(opacity: animation, child: child);
        },
        transitionDuration: const Duration(milliseconds: 500),
      ),
    );
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final l10n = L10n.of(context);

    return GradientBackground(
      child: Scaffold(
        backgroundColor: Colors.transparent,
        body: SafeArea(
          child: Center(
            child: FadeTransition(
              opacity: _fadeAnimation,
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  // Mascota / Logo
                  Image.asset(
                    'assets/img/elcajucubano.png',
                    width: 200,
                    height: 200,
                    fit: BoxFit.contain,
                  ),
                  const SizedBox(height: AppDimensions.paddingLarge),

                  // Nombre de la app
                  Text(
                    l10n?.appName ?? 'ElCaju',
                    style: const TextStyle(
                      fontFamily: 'Inter',
                      fontSize: 36,
                      fontWeight: FontWeight.bold,
                      color: Colors.white,
                      letterSpacing: 1.2,
                    ),
                  ),
                  const SizedBox(height: AppDimensions.paddingSmall),

                  // Subtítulo
                  Text(
                    l10n?.appTagline ?? 'Tu wallet de ecash privado',
                    style: TextStyle(
                      fontFamily: 'Inter',
                      fontSize: 16,
                      fontWeight: FontWeight.w500,
                      color: AppColors.textSecondary.withValues(alpha: 0.8),
                    ),
                  ),
                  const SizedBox(height: AppDimensions.paddingXLarge * 2),

                  // Loading indicator o mensaje de error
                  if (_errorMessage != null)
                    Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 32),
                      child: Text(
                        _errorMessage!,
                        style: const TextStyle(
                          fontFamily: 'Inter',
                          fontSize: 12,
                          color: AppColors.error,
                        ),
                        textAlign: TextAlign.center,
                      ),
                    )
                  else
                    SizedBox(
                      width: 32,
                      height: 32,
                      child: CircularProgressIndicator(
                        strokeWidth: 2,
                        valueColor: AlwaysStoppedAnimation<Color>(
                          AppColors.secondaryAction.withValues(alpha: 0.8),
                        ),
                      ),
                    ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}