powerage-ristoris-flutter/lib/ui/pages/payments/payments_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/intl.dart';
import '../../../providers/auth_provider.dart';
import '../../../providers/database_provider.dart';
import '../../../database/database.dart';
import '../../widgets/empty_state.dart';
import '../../../core/responsive.dart';

final paymentsProvider = FutureProvider.family<List<Scadenza>, int>((ref, idAgente) {
  return ref.read(scadenzeDaoProvider).getScadenzePerAgente(idAgente);
});

class PaymentsPage extends ConsumerWidget {
  const PaymentsPage({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final agente = ref.watch(authProvider).agente;
    final paysAsync = agente != null ? ref.watch(paymentsProvider(agente.idAgente)) : null;

    return Scaffold(
      appBar: AppBar(title: const Text('Scadenze')),
      body: SafeArea(
        child: paysAsync?.when(
          data: (pays) {
            if (pays.isEmpty) return const EmptyState(icon: Icons.account_balance_wallet_outlined, title: 'Nessuna scadenza');
            return ListView.builder(
              itemCount: pays.length,
              itemBuilder: (_, i) => _ScadenzaCard(scadenza: pays[i]),
            );
          },
          loading: () => const Center(child: CircularProgressIndicator()),
          error: (e, _) => Center(child: Text('Errore: $e')),
        ) ?? const Center(child: CircularProgressIndicator()),
      ),
    );
  }
}

class _ScadenzaCard extends StatelessWidget {
  final Scadenza scadenza;
  const _ScadenzaCard({required this.scadenza});

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final importo = scadenza.importoScadenza ?? 0;
    final scaduta = scadenza.dataScadenza != null && DateTime.parse(scadenza.dataScadenza!).isBefore(DateTime.now());

    return Card(
      margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 3),
      color: scaduta ? Colors.red.shade50 : null,
      child: ListTile(
        leading: CircleAvatar(
          backgroundColor: scaduta ? Colors.red.shade100 : theme.colorScheme.primaryContainer,
          child: Icon(Icons.account_balance_wallet_outlined, color: scaduta ? Colors.red : theme.colorScheme.primary),
        ),
        title: Text('Documento ${scadenza.numDoc ?? ""}'),
        subtitle: Text('Scadenza: ${scadenza.dataScadenza ?? ""}'),
        trailing: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.end,
          children: [
            Text(NumberFormat.currency(locale: 'it', symbol: '€').format(importo),
              style: theme.textTheme.titleSmall?.copyWith(fontWeight: FontWeight.bold)),
            if (scaduta)
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 1),
                decoration: BoxDecoration(color: Colors.red, borderRadius: BorderRadius.circular(8)),
                child: const Text('SCADUTA', style: TextStyle(color: Colors.white, fontSize: 10)),
              ),
          ],
        ),
      ),
    );
  }
}