import 'package:flutter/material.dart';
import 'package:barber_app/core/theme/app_theme.dart';
import 'package:barber_app/core/constants/app_strings.dart';
import 'package:barber_app/features/haircuts/data/repositories/haircut_repository.dart';
import 'package:barber_app/features/services/data/models/service_model.dart';
import 'package:barber_app/features/services/data/repositories/service_repository.dart';
import 'package:barber_app/features/services/presentation/pages/services_page.dart';
import 'package:barber_app/shared/widgets/custom_text_field.dart';
import 'package:barber_app/shared/widgets/loading_button.dart';
import 'package:intl/intl.dart';

class AddHaircutPage extends StatefulWidget {
  const AddHaircutPage({super.key});

  @override
  State<AddHaircutPage> createState() => _AddHaircutPageState();
}

class _AddHaircutPageState extends State<AddHaircutPage> {
  final _formKey = GlobalKey<FormState>();
  final _clientNameController = TextEditingController();
  final _priceController = TextEditingController();
  final _notesController = TextEditingController();

  final _serviceRepo = ServiceRepository();
  List<ServiceModel> _services = [];
  ServiceModel? _selectedService;

  bool _isLoading = false;
  final _paymentMethods = [
    'Dinheiro',
    'PIX',
    'Cartão de Crédito',
    'Cartão de Débito',
    'Fiado',
  ];
  String _selectedPaymentMethod = 'Dinheiro';

  final _currencyFormat = NumberFormat.currency(locale: 'pt_BR', symbol: 'R\$');

  @override
  void initState() {
    super.initState();
    _loadServices();
  }

  void _loadServices() {
    setState(() {
      _services = _serviceRepo.getAllServices();
    });
  }

  void _onServiceSelected(ServiceModel? service) {
    if (service == null) return;
    setState(() {
      _selectedService = service;
      // Preenche o valor automaticamente
      _priceController.text = service.price.toStringAsFixed(2);
    });
  }

  Future<void> _saveHaircut() async {
    if (!(_formKey.currentState?.validate() ?? false)) return;

    // Validação flexível: Se selecionou serviço ou digitou preço
    // Aqui assumimos que serviceType será o nome do serviço selecionado
    // Se não selecionou, impedimos? Sim, melhor forçar seleção ou ter um 'Outro'
    if (_selectedService == null) {
      ScaffoldMessenger.of(
        context,
      ).showSnackBar(const SnackBar(content: Text('Selecione um serviço')));
      return;
    }

    setState(() => _isLoading = true);

    try {
      final haircutRepo = HaircutRepository();

      final price =
          double.tryParse(_priceController.text.replaceAll(',', '.')) ??
          _selectedService!.price;

      await haircutRepo.createHaircut(
        clientName: _clientNameController.text,
        serviceType: _selectedService!.name,
        price: price,
        dateTime: DateTime.now(),
        notes: _notesController.text.isNotEmpty ? _notesController.text : null,
        isPaid: _selectedPaymentMethod != 'Fiado',
        paymentMethod: _selectedPaymentMethod,
      );

      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(
            content: Text(AppStrings.savedSuccessfully),
            backgroundColor: AppColors.success,
          ),
        );
        Navigator.pop(context);
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Erro: $e'), backgroundColor: AppColors.error),
        );
      }
    } finally {
      if (mounted) {
        setState(() => _isLoading = false);
      }
    }
  }

  @override
  void dispose() {
    _clientNameController.dispose();
    _priceController.dispose();
    _notesController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text(AppStrings.newHaircut),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back_ios),
          onPressed: () => Navigator.pop(context),
        ),
      ),
      body: SafeArea(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(24),
          child: Form(
            key: _formKey,
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                // Cliente
                CustomTextField(
                  controller: _clientNameController,
                  label: AppStrings.clientName,
                  hint: 'Nome do cliente',
                  prefixIcon: Icons.person_outline,
                  textCapitalization: TextCapitalization.words,
                  validator: (v) =>
                      v?.isEmpty ?? true ? 'Informe o nome do cliente' : null,
                ),
                const SizedBox(height: 24),

                // Lista de Serviços (Chips)
                const Text(
                  'Selecione o Serviço',
                  style: TextStyle(fontSize: 14, fontWeight: FontWeight.bold),
                ),
                const SizedBox(height: 12),

                if (_services.isEmpty)
                  Container(
                    padding: const EdgeInsets.all(16),
                    decoration: BoxDecoration(
                      color: AppColors.surfaceLight,
                      borderRadius: BorderRadius.circular(12),
                    ),
                    child: Column(
                      children: [
                        const Text(
                          'Nenhum serviço cadastrado.',
                          style: TextStyle(color: AppColors.textSecondary),
                        ),
                        const SizedBox(height: 12),
                        ElevatedButton.icon(
                          onPressed: () async {
                            await Navigator.push(
                              context,
                              MaterialPageRoute(
                                builder: (_) => const ServicesPage(),
                              ),
                            );
                            _loadServices();
                          },
                          icon: const Icon(Icons.add, size: 18),
                          label: const Text('Cadastrar Serviços'),
                          style: ElevatedButton.styleFrom(
                            backgroundColor: AppColors.primaryColor,
                            foregroundColor: Colors.black,
                            padding: const EdgeInsets.symmetric(
                              horizontal: 16,
                              vertical: 8,
                            ),
                          ),
                        ),
                      ],
                    ),
                  )
                else
                  Wrap(
                    spacing: 8,
                    runSpacing: 8,
                    children: _services.map((service) {
                      final isSelected = _selectedService?.id == service.id;
                      return ChoiceChip(
                        label: Text(
                          '${service.name} - ${_currencyFormat.format(service.price)}',
                          style: TextStyle(
                            color: isSelected
                                ? Colors.black
                                : (Theme.of(context).brightness ==
                                          Brightness.dark
                                      ? AppColors.textPrimary
                                      : Colors.black87),
                            fontWeight: isSelected
                                ? FontWeight.bold
                                : FontWeight.normal,
                          ),
                        ),
                        selected: isSelected,
                        selectedColor: AppColors.primaryColor,
                        backgroundColor: AppColors.surface,
                        side: BorderSide(
                          color: isSelected
                              ? AppColors.primaryColor
                              : AppColors.surfaceLight,
                        ),
                        onSelected: (selected) {
                          if (selected) _onServiceSelected(service);
                        },
                      );
                    }).toList(),
                  ),

                const SizedBox(height: 24),

                // Valor (Editável)
                CustomTextField(
                  controller: _priceController,
                  label: AppStrings.price,
                  hint: '0,00',
                  prefixIcon: Icons.attach_money,
                  keyboardType: TextInputType.number,
                  validator: (v) {
                    if (v?.isEmpty ?? true) return 'Informe o valor';
                    final parsed = double.tryParse(v!.replaceAll(',', '.'));
                    if (parsed == null || parsed < 0) return 'Valor inválido';
                    return null;
                  },
                ),
                const SizedBox(height: 24),

                // Observações
                CustomTextField(
                  controller: _notesController,
                  label: AppStrings.notes,
                  hint: 'Observações (opcional)',
                  prefixIcon: Icons.note_outlined,
                  maxLines: 3,
                ),
                const SizedBox(height: 16),

                // Forma de Pagamento
                Container(
                  padding: const EdgeInsets.symmetric(
                    horizontal: 16,
                    vertical: 4,
                  ),
                  decoration: BoxDecoration(
                    color: Theme.of(context).brightness == Brightness.dark
                        ? AppColors.surface
                        : Colors.white,
                    borderRadius: BorderRadius.circular(16),
                    border: Border.all(color: AppColors.surfaceLight),
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Padding(
                        padding: const EdgeInsets.only(top: 8, bottom: 4),
                        child: Text(
                          'Forma de Pagamento',
                          style: TextStyle(
                            fontSize: 12,
                            fontWeight: FontWeight.bold,
                            color:
                                Theme.of(context).brightness == Brightness.dark
                                ? AppColors.textSecondary
                                : Colors.black54,
                          ),
                        ),
                      ),
                      DropdownButtonFormField<String>(
                        initialValue: _selectedPaymentMethod,
                        decoration: const InputDecoration(
                          border: InputBorder.none,
                          contentPadding: EdgeInsets.zero,
                          isDense: true,
                        ),
                        dropdownColor:
                            Theme.of(context).brightness == Brightness.dark
                            ? AppColors.surface
                            : Colors.white,
                        style: TextStyle(
                          color: Theme.of(context).brightness == Brightness.dark
                              ? AppColors.textPrimary
                              : Colors.black87,
                          fontSize: 16,
                        ),
                        onChanged: (String? newValue) {
                          if (newValue != null) {
                            setState(() {
                              _selectedPaymentMethod = newValue;
                            });
                          }
                        },
                        items: _paymentMethods.map<DropdownMenuItem<String>>((
                          String value,
                        ) {
                          return DropdownMenuItem<String>(
                            value: value,
                            child: Text(value),
                          );
                        }).toList(),
                      ),

                      // Feedback visual do status
                      Padding(
                        padding: const EdgeInsets.only(bottom: 8),
                        child: Text(
                          _selectedPaymentMethod == 'Fiado'
                              ? 'Status: Pendente (A Receber)'
                              : 'Status: Pago (Entra no Caixa)',
                          style: TextStyle(
                            fontSize: 12,
                            color: _selectedPaymentMethod == 'Fiado'
                                ? AppColors.warning
                                : AppColors.success,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),

                const SizedBox(height: 32),

                LoadingButton(
                  text: 'Salvar Corte',
                  isLoading: _isLoading,
                  onPressed: _saveHaircut,
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}