import 'package:flutter/material.dart';

import '../app_config.dart';
import '../models/address_entry.dart';
import '../models/auth_session.dart';
import '../services/auth_repository.dart';
import '../services/address_repository.dart';
import 'dashboard_screen.dart';

class AddressScreen extends StatefulWidget {
  const AddressScreen({
    super.key,
    required this.authRepository,
    required this.addressRepository,
    required this.session,
    this.enableLiveFeatures = true,
  });

  final AuthRepository authRepository;
  final AddressRepository addressRepository;
  final AuthSession session;
  final bool enableLiveFeatures;

  @override
  State<AddressScreen> createState() => _AddressScreenState();
}

class _AddressScreenState extends State<AddressScreen> {
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  final TextEditingController _houseNumberController = TextEditingController();
  final TextEditingController _coloniaController = TextEditingController();
  final TextEditingController _streetController = TextEditingController();

  bool _isSaving = false;
  String? _errorMessage;

  @override
  void dispose() {
    _houseNumberController.dispose();
    _coloniaController.dispose();
    _streetController.dispose();
    super.dispose();
  }

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

    setState(() {
      _isSaving = true;
      _errorMessage = null;
    });

    try {
      await widget.addressRepository.saveAddress(
        session: widget.session,
        address: AddressEntry(
          houseNumber: _houseNumberController.text.trim(),
          colonia: _coloniaController.text.trim(),
          street: _streetController.text.trim(),
        ),
      );

      if (!mounted) {
        return;
      }

      Navigator.of(context).pushAndRemoveUntil(
        MaterialPageRoute(
          builder: (_) => DashboardScreen(
            authRepository: widget.authRepository,
            addressRepository: widget.addressRepository,
            session: widget.session,
            savedAddress: AddressEntry(
              houseNumber: _houseNumberController.text.trim(),
              colonia: _coloniaController.text.trim(),
              street: _streetController.text.trim(),
            ),
            enableLiveFeatures: widget.enableLiveFeatures,
          ),
        ),
        (route) => false,
      );
    } on AddressException catch (error) {
      if (!mounted) {
        return;
      }
      setState(() {
        _errorMessage = error.message;
      });
    } catch (_) {
      if (!mounted) {
        return;
      }
      setState(() {
        _errorMessage = 'No se pudo guardar la dirección. Revisa el backend.';
      });
    } finally {
      if (mounted) {
        setState(() {
          _isSaving = false;
        });
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: const BoxDecoration(
          gradient: LinearGradient(
            colors: [Color(0xFFF8FAFC), Color(0xFFE2E8F0), Color(0xFFCCFBF1)],
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
          ),
        ),
        child: SafeArea(
          child: Center(
            child: SingleChildScrollView(
              padding: const EdgeInsets.all(20),
              child: ConstrainedBox(
                constraints: const BoxConstraints(maxWidth: 520),
                child: Card(
                  elevation: 12,
                  shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(28)),
                  child: SingleChildScrollView(
                    padding: const EdgeInsets.all(24),
                    child: Column(
                      mainAxisSize: MainAxisSize.min,
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        const Text(
                          'Dirección',
                          style: TextStyle(fontSize: 30, fontWeight: FontWeight.w800),
                        ),
                        const SizedBox(height: 8),
                        Text(
                          'Ingresa la dirección de tu casa y se enviará al backend para guardarla en PostgreSQL.',
                          style: TextStyle(color: Colors.grey.shade700, height: 1.4),
                        ),
                        const SizedBox(height: 20),
                        if (_errorMessage != null) ...[
                          _AddressStatusBanner(message: _errorMessage!),
                          const SizedBox(height: 16),
                        ],
                        Form(
                          key: _formKey,
                          child: Column(
                            children: [
                              TextFormField(
                                controller: _houseNumberController,
                                keyboardType: TextInputType.text,
                                decoration: const InputDecoration(
                                  labelText: 'Número de casa',
                                  prefixIcon: Icon(Icons.home_outlined),
                                  border: OutlineInputBorder(),
                                ),
                                validator: (value) {
                                  if (value == null || value.trim().isEmpty) {
                                    return 'Ingresa el número de casa';
                                  }
                                  return null;
                                },
                              ),
                              const SizedBox(height: 16),
                              TextFormField(
                                controller: _coloniaController,
                                decoration: const InputDecoration(
                                  labelText: 'Colonia',
                                  prefixIcon: Icon(Icons.location_city_outlined),
                                  border: OutlineInputBorder(),
                                ),
                                validator: (value) {
                                  if (value == null || value.trim().isEmpty) {
                                    return 'Ingresa la colonia';
                                  }
                                  return null;
                                },
                              ),
                              const SizedBox(height: 16),
                              TextFormField(
                                controller: _streetController,
                                decoration: const InputDecoration(
                                  labelText: 'Calle',
                                  prefixIcon: Icon(Icons.signpost_outlined),
                                  border: OutlineInputBorder(),
                                ),
                                validator: (value) {
                                  if (value == null || value.trim().isEmpty) {
                                    return 'Ingresa la calle';
                                  }
                                  return null;
                                },
                              ),
                              const SizedBox(height: 20),
                              SizedBox(
                                width: double.infinity,
                                height: 52,
                                child: FilledButton(
                                  onPressed: _isSaving ? null : _saveAddress,
                                  child: _isSaving
                                      ? const SizedBox(
                                          width: 22,
                                          height: 22,
                                          child: CircularProgressIndicator(strokeWidth: 2.2, color: Colors.white),
                                        )
                                      : const Text('Guardar dirección'),
                                ),
                              ),
                              const SizedBox(height: 12),
                              Text(
                                'Base URL configurada: ${AppConfig.apiBaseUrl}',
                                style: TextStyle(fontSize: 12, color: Colors.grey.shade600),
                                textAlign: TextAlign.center,
                              ),
                            ],
                          ),
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }
}

class _AddressStatusBanner extends StatelessWidget {
  const _AddressStatusBanner({required this.message});

  final String message;

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFFFEE2E2),
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: const Color(0xFFFCA5A5)),
      ),
      child: Text(
        message,
        style: const TextStyle(color: Color(0xFF991B1B), height: 1.35),
      ),
    );
  }
}