import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:lottie/lottie.dart';
import 'package:supabase_flutter/supabase_flutter.dart';
import '/core/auth_provider.dart';
import '/models/invite.dart';
import '/features/auth/invite_pending_screen.dart';

class SplashScreen extends ConsumerStatefulWidget {
  const SplashScreen({super.key});
  @override
  ConsumerState<SplashScreen> createState() => _SplashScreenState();
}

class _SplashScreenState extends ConsumerState<SplashScreen>
    with SingleTickerProviderStateMixin {
  late AnimationController _ctrl;

  @override
  void initState() {
    super.initState();
    _ctrl = AnimationController(vsync: this, duration: const Duration(seconds: 2));
    _ctrl.forward();
    Future.delayed(const Duration(milliseconds: 2200), _navigate);
  }

  Future<void> _navigate() async {
    if (!mounted) return;
    try {
      await ref.read(authNotifierProvider.future);
      final session = await ref.read(currentSessionProvider.future);
      if (!mounted) return;

      if (session == null) { context.go('/login'); return; }

      // ─── Verificar se o utilizador tem perfil
      final supabase = Supabase.instance.client;
      final profile = await supabase
          .from('profiles')
          .select()
          .eq('user_id', session.user.id)
          .maybeSingle();

      // ─── Verificar convite pendente pelo email
      final email = session.user.email ?? '';
      final inviteData = await supabase
          .from('invites')
          .select()
          .eq('email', email)
          .eq('status', 'pending')
          .gt('expires_at', DateTime.now().toIso8601String())
          .order('created_at', ascending: false)
          .limit(1)
          .maybeSingle();

      if (!mounted) return;

      if (inviteData != null) {
        final invite = Invite.fromMap(inviteData);
        if (!invite.isExpired) {
          // Mostrar ecrã de aceitação de convite
          Navigator.of(context).pushReplacement(
            MaterialPageRoute(builder: (_) => InvitePendingScreen(invite: invite)),
          );
          return;
        }
      }

      if (profile == null) {
        // Sem perfil e sem convite → ecrã de espera / registo incompleto
        context.go('/login');
      } else {
        context.go('/home');
      }
    } catch (_) {
      if (mounted) context.go('/login');
    }
  }

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFF0D1117),
      body: Stack(children: [
        // Orbs
        Positioned(top: -100, right: -80,
          child: _orb(300, const Color(0xFF4FC3F7).withOpacity(0.08))),
        Positioned(bottom: -80, left: -60,
          child: _orb(250, const Color(0xFFA5D6A7).withOpacity(0.06))),
        SafeArea(
          child: Center(
            child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
              // Logo com glow
              Container(
                padding: const EdgeInsets.all(20),
                decoration: BoxDecoration(
                  shape: BoxShape.circle,
                  gradient: RadialGradient(colors: [
                    const Color(0xFF4FC3F7).withOpacity(0.15),
                    Colors.transparent,
                  ]),
                  border: Border.all(color: const Color(0xFF4FC3F7).withOpacity(0.2), width: 1.5),
                ),
                child: Image.asset('assets/logo.png', height: 100,
                    errorBuilder: (_, __, ___) => const Icon(Icons.child_care, size: 80, color: Color(0xFF4FC3F7))),
              ),
              const SizedBox(height: 24),
              const Text('SEMENTES DO FUTURO',
                  style: TextStyle(color: Colors.white, fontSize: 20, fontWeight: FontWeight.w900, letterSpacing: 2)),
              const SizedBox(height: 6),
              const Text('Diário do Candengue',
                  style: TextStyle(color: Color(0xFF4FC3F7), fontSize: 13, letterSpacing: 1.5)),
              const SizedBox(height: 48),
              Lottie.asset('assets/splash_animation.json',
                  controller: _ctrl, height: 80, repeat: false,
                  errorBuilder: (_, __, ___) => const SizedBox(
                    height: 40, width: 40,
                    child: CircularProgressIndicator(color: Color(0xFF4FC3F7), strokeWidth: 2),
                  )),
              const SizedBox(height: 16),
              Text('"Conforto, cuidado e aprendizagem"',
                  style: TextStyle(color: Colors.white.withOpacity(0.3), fontSize: 12, fontStyle: FontStyle.italic)),
            ]),
          ),
        ),
      ]),
    );
  }

  Widget _orb(double size, Color color) => Container(width: size, height: size,
    decoration: BoxDecoration(shape: BoxShape.circle, color: color,
        boxShadow: [BoxShadow(color: color, blurRadius: size / 2)]));
}