import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flux/features/services/blocs/services_cubit.dart';
import 'package:flux/features/services/models/energy_service_model.dart';
import 'package:flux/features/services/models/service_model.dart';

class ServiceFormScreen extends StatefulWidget {
  final ServiceModel? initialService; // Se nullo, è un nuovo inserimento

  const ServiceFormScreen({super.key, this.initialService});

  @override
  State<ServiceFormScreen> createState() => _ServiceFormScreenState();
}

class _ServiceFormScreenState extends State<ServiceFormScreen> {
  late ServiceModel currentService;

  @override
  void initState() {
    super.initState();
    // Se passiamo un servizio esistente lo carichiamo, altrimenti ne creiamo uno "vuoto"
    currentService =
        widget.initialService ??
        ServiceModel(
          storeId: 'ID_NEGOZIO_QUI', // Poi lo prenderai dal profilo utente
          number: '',
          energyServices: const [],
          finServices: const [],
          entertainmentServices: const [],
        );
  }

  // Metodo generico per aggiungere un servizio energia
  void _addEnergy() {
    setState(() {
      final newList =
          List<EnergyServiceModel>.from(currentService.energyServices)..add(
            EnergyServiceModel(
              type: EnergyType.luce, // Default
              expiration: DateTime.now().add(const Duration(days: 365)),
              providerId: '', // Lo sceglierà l'utente
            ),
          );
      currentService = currentService.copyWith(energyServices: newList);
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          widget.initialService == null ? "Nuova Pratica" : "Modifica",
        ),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16),
        child: Column(
          children: [
            // --- SEZIONE DATI GENERALI ---
            TextField(
              decoration: const InputDecoration(labelText: "Numero Pratica"),
              onChanged: (v) =>
                  currentService = currentService.copyWith(number: v),
            ),

            const Divider(height: 32),

            // --- SEZIONE ENERGY ---
            _SectionHeader(
              title: "Energia (Luce/Gas)",
              onAdd: _addEnergy,
              icon: Icons.electric_bolt,
            ),
            ...currentService.energyServices.asMap().entries.map((entry) {
              int idx = entry.key;
              var item = entry.value;
              return Card(
                child: ListTile(
                  title: Text(
                    "${item.type.name.toUpperCase()} - Scadenza: ${item.expiration.year}",
                  ),
                  trailing: IconButton(
                    icon: const Icon(Icons.delete, color: Colors.red),
                    onPressed: () {
                      setState(() {
                        final newList = List<EnergyServiceModel>.from(
                          currentService.energyServices,
                        )..removeAt(idx);
                        currentService = currentService.copyWith(
                          energyServices: newList,
                        );
                      });
                    },
                  ),
                ),
              );
            }),

            const SizedBox(height: 40),

            // --- BOTTONE SALVA ---
            ElevatedButton(
              style: ElevatedButton.styleFrom(
                minimumSize: const Size.fromHeight(50),
              ),
              onPressed: () {
                context.read<ServicesCubit>().addService(currentService);
                Navigator.pop(context);
              },
              child: const Text("SALVA TUTTO"),
            ),
          ],
        ),
      ),
    );
  }
}

class _SectionHeader extends StatelessWidget {
  final String title;
  final VoidCallback onAdd;
  final IconData icon;

  const _SectionHeader({
    required this.title,
    required this.onAdd,
    required this.icon,
  });

  @override
  Widget build(BuildContext context) {
    return Row(
      children: [
        Icon(icon, color: Colors.orange),
        const SizedBox(width: 8),
        Text(
          title,
          style: const TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
        ),
        const Spacer(),
        IconButton(
          onPressed: onAdd,
          icon: const Icon(Icons.add_circle, color: Colors.green, size: 30),
        ),
      ],
    );
  }
}