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

import '../services/client_repository.dart';
import '../services/recompense_repository.dart';
import '../services/reglages.dart';
import '../supabase_config.dart';
import 'home_shell.dart';
import 'staff_login_screen.dart';

/// Aiguille entre l'écran de connexion (staff non connecté) et l'app.
/// Écoute l'état d'authentification Supabase en continu.
class AuthGate extends StatelessWidget {
  const AuthGate({super.key});

  @override
  Widget build(BuildContext context) {
    if (!SupabaseConfig.estConfigure) return const _EcranNonConfigure();

    return StreamBuilder<AuthState>(
      stream: supabase.auth.onAuthStateChange,
      builder: (context, snapshot) {
        final session = supabase.auth.currentSession;
        if (session == null) return const StaffLoginScreen();
        return const _AppChargee();
      },
    );
  }
}

/// Charge les données (réglages, clients, récompenses) après connexion, puis
/// affiche l'app. Recharge si le compte connecté change.
class _AppChargee extends StatefulWidget {
  const _AppChargee();

  @override
  State<_AppChargee> createState() => _AppChargeeState();
}

class _AppChargeeState extends State<_AppChargee> {
  late Future<void> _chargement;

  @override
  void initState() {
    super.initState();
    _chargement = _charger();
  }

  Future<void> _charger() async {
    await Reglages.instance.charger();
    await ClientRepository.instance.charger();
    await RecompenseRepository.instance.charger();
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<void>(
      future: _chargement,
      builder: (context, snapshot) {
        if (snapshot.connectionState != ConnectionState.done) {
          return const Scaffold(
            body: Center(child: CircularProgressIndicator()),
          );
        }
        return const HomeShell();
      },
    );
  }
}

class _EcranNonConfigure extends StatelessWidget {
  const _EcranNonConfigure();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(32),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: const [
              Icon(Icons.cloud_off, size: 56, color: Colors.grey),
              SizedBox(height: 16),
              Text('Supabase non configuré',
                  style: TextStyle(fontSize: 18, fontWeight: FontWeight.w700)),
              SizedBox(height: 8),
              Text(
                'Renseignez l\'URL et la clé anon dans lib/supabase_config.dart.\n'
                'Voir supabase/SETUP.md',
                textAlign: TextAlign.center,
                style: TextStyle(color: Color(0xFF6B6B72)),
              ),
            ],
          ),
        ),
      ),
    );
  }
}