import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/intl.dart';
import 'package:ristoris/providers/customer_provider.dart';

class PaymentsTab extends ConsumerWidget {
  final int idCliente;
  final ThemeData theme;
  const PaymentsTab({required this.idCliente, required this.theme});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final paysAsync = ref.watch(customerPaymentsProvider(idCliente));
    return paysAsync.when(
      data: (pays) {
        if (pays.isEmpty) return const Center(child: Text('Nessuna scadenza'));
        return ListView.builder(
          padding: const EdgeInsets.all(8),
          itemCount: pays.length,
          itemBuilder: (_, i) {
            final p = pays[i];
            return Card(
              margin: const EdgeInsets.symmetric(vertical: 4),
              child: Padding(
                padding: const EdgeInsets.all(12),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    _row('Fattura N.', p.numDoc ?? '-'),
                    _row('Data fatt.', _formatDate(p.dataDoc)),
                    _row('Data scad', _formatDate(p.dataScadenza)),
                    _row('Totale fattura', _formatAmount(p.importoFattura)),
                    _row('Totale scad.', _formatAmount(p.importoScadenza)),
                    _row('Saldo', _formatAmount(p.saldo)),
                  ],
                ),
              ),
            );
          },
        );
      },
      loading: () => const Center(child: CircularProgressIndicator()),
      error: (e, _) => Center(child: Text('Errore: $e')),
    );
  }

  String _formatDate(String? dateStr) {
    if (dateStr == null) return '-';
    try {
      final dt = DateTime.parse(dateStr);
      return DateFormat('dd/MM/yyyy').format(dt);
    } catch (_) {
      return dateStr;
    }
  }

  String _formatAmount(double? amount) {
    if (amount == null) return '-';
    final fmt = NumberFormat('#,##0.00', 'it');
    return '€ ${fmt.format(amount)}';
  }

  Widget _row(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 2),
      child: Row(
        children: [
          SizedBox(
            width: 110,
            child: Text(
              label,
              style: theme.textTheme.bodySmall?.copyWith(
                color: theme.colorScheme.outline,
              ),
            ),
          ),
          Expanded(
            child: Text(value, style: theme.textTheme.bodyMedium),
          ),
        ],
      ),
    );
  }
}