import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:ristoris/providers/auth_provider.dart';
import 'package:ristoris/providers/database_provider.dart';

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

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final agentiAsync = ref.watch(agentiListProvider);
    final currentAgent = ref.watch(authProvider).agente;
    final theme = Theme.of(context);

    return Scaffold(
      appBar: AppBar(title: const Text('Cambia agente')),
      body: agentiAsync.when(
        data: (agenti) {
          final filtered =
              agenti.where((a) => a.idAgente != currentAgent?.idAgente).toList();
          if (filtered.isEmpty) {
            return const Center(child: Text('Nessun altro agente disponibile'));
          }
          return ListView.builder(
            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
            itemCount: filtered.length,
            itemBuilder: (_, i) {
              final a = filtered[i];
              return Card(
                margin: const EdgeInsets.only(bottom: 8),
                child: ListTile(
                  leading: CircleAvatar(
                    backgroundColor: theme.colorScheme.primaryContainer,
                    child: Text(
                      a.ragioneSociale?.substring(0, 1).toUpperCase() ?? '?',
                      style: TextStyle(color: theme.colorScheme.onPrimaryContainer),
                    ),
                  ),
                  title: Text(a.ragioneSociale ?? ''),
                  subtitle: Text('Cod. ${a.codAgente ?? ''}'),
                  trailing: const Icon(Icons.chevron_right),
                  onTap: () async {
                    await ref.read(authProvider.notifier).switchAgent(a);
                    if (context.mounted) {
                      context.go('/dashboard');
                    }
                  },
                ),
              );
            },
          );
        },
        loading: () => const Center(child: CircularProgressIndicator()),
        error: (e, _) => Center(child: Text('Errore: $e')),
      ),
    );
  }
}