import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:go_router/go_router.dart';
import 'dart:math' as math;

import 'custom_app_text_field.dart';
import 'app_custom_checkbox.dart';
import '../models/card_assets.dart';

/// Modèle de données pour le formulaire
class PersonalInfoData {
  String firstName;
  String lastName;
  String phone;
  String email;
  String address;
  String postalCode;
  String city;

  PersonalInfoData({
    this.firstName = '',
    this.lastName = '',
    this.phone = '',
    this.email = '',
    this.address = '',
    this.postalCode = '',
    this.city = '',
  });
}

/// Widget générique pour les formulaires d'informations personnelles
class PersonalInfoFormScreen extends StatefulWidget {
  final String stepText; // Ex: "Étape 1/5"
  final String title; // Ex: "Informations du Parent Principal"
  final CardColorHorizontal cardColor;
  final PersonalInfoData initialData;
  final Function(PersonalInfoData data, {bool? hasSecondPerson, bool? sameAddress}) onSubmit;
  final String previousRoute;
  
  // Options spécifiques pour Parent 2
  final bool showSecondPersonToggle; // Afficher "Il y a un 2ème parent"
  final bool? initialHasSecondPerson;
  final bool showSameAddressCheckbox; // Afficher "Même adresse que parent 1"
  final bool? initialSameAddress;
  final PersonalInfoData? referenceAddressData; // Pour pré-remplir si "même adresse"

  const PersonalInfoFormScreen({
    super.key,
    required this.stepText,
    required this.title,
    required this.cardColor,
    required this.initialData,
    required this.onSubmit,
    required this.previousRoute,
    this.showSecondPersonToggle = false,
    this.initialHasSecondPerson,
    this.showSameAddressCheckbox = false,
    this.initialSameAddress,
    this.referenceAddressData,
  });

  @override
  State<PersonalInfoFormScreen> createState() => _PersonalInfoFormScreenState();
}

class _PersonalInfoFormScreenState extends State<PersonalInfoFormScreen> {
  final _formKey = GlobalKey<FormState>();
  late TextEditingController _lastNameController;
  late TextEditingController _firstNameController;
  late TextEditingController _phoneController;
  late TextEditingController _emailController;
  late TextEditingController _addressController;
  late TextEditingController _postalCodeController;
  late TextEditingController _cityController;
  
  bool _hasSecondPerson = false;
  bool _sameAddress = false;
  bool _fieldsEnabled = true;

  @override
  void initState() {
    super.initState();
    _lastNameController = TextEditingController(text: widget.initialData.lastName);
    _firstNameController = TextEditingController(text: widget.initialData.firstName);
    _phoneController = TextEditingController(text: widget.initialData.phone);
    _emailController = TextEditingController(text: widget.initialData.email);
    _addressController = TextEditingController(text: widget.initialData.address);
    _postalCodeController = TextEditingController(text: widget.initialData.postalCode);
    _cityController = TextEditingController(text: widget.initialData.city);
    
    if (widget.showSecondPersonToggle) {
      _hasSecondPerson = widget.initialHasSecondPerson ?? true;
      _fieldsEnabled = _hasSecondPerson;
    }
    
    if (widget.showSameAddressCheckbox) {
      _sameAddress = widget.initialSameAddress ?? false;
      _updateAddressFields();
    }
  }

  @override
  void dispose() {
    _lastNameController.dispose();
    _firstNameController.dispose();
    _phoneController.dispose();
    _emailController.dispose();
    _addressController.dispose();
    _postalCodeController.dispose();
    _cityController.dispose();
    super.dispose();
  }

  void _updateAddressFields() {
    if (_sameAddress && widget.referenceAddressData != null) {
      _addressController.text = widget.referenceAddressData!.address;
      _postalCodeController.text = widget.referenceAddressData!.postalCode;
      _cityController.text = widget.referenceAddressData!.city;
    }
  }

  void _handleSubmit() {
    if (_formKey.currentState!.validate()) {
      final data = PersonalInfoData(
        firstName: _firstNameController.text,
        lastName: _lastNameController.text,
        phone: _phoneController.text,
        email: _emailController.text,
        address: _addressController.text,
        postalCode: _postalCodeController.text,
        city: _cityController.text,
      );
      
      widget.onSubmit(
        data,
        hasSecondPerson: widget.showSecondPersonToggle ? _hasSecondPerson : null,
        sameAddress: widget.showSameAddressCheckbox ? _sameAddress : null,
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final screenSize = MediaQuery.of(context).size;

    return Scaffold(
      body: Stack(
        children: [
          Positioned.fill(
            child: Image.asset('assets/images/paper2.png', fit: BoxFit.cover, repeat: ImageRepeat.repeat),
          ),
          Center(
            child: SingleChildScrollView(
              padding: const EdgeInsets.symmetric(vertical: 40.0),
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text(stepText, style: GoogleFonts.merienda(fontSize: 16, color: Colors.black54)),
                  const SizedBox(height: 10),
                  Text(
                    widget.title,
                    style: GoogleFonts.merienda(
                      fontSize: 24,
                      fontWeight: FontWeight.bold,
                      color: Colors.black87,
                    ),
                    textAlign: TextAlign.center,
                  ),
                  const SizedBox(height: 30),
                  
                  // Toggle "Il y a un 2ème parent" (uniquement pour Parent 2)
                  if (widget.showSecondPersonToggle) ...[
                    Padding(
                      padding: EdgeInsets.symmetric(horizontal: screenSize.width * 0.2),
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: [
                          Text(
                            'Il y a un 2ème parent ?',
                            style: GoogleFonts.merienda(fontSize: 18, fontWeight: FontWeight.w600),
                          ),
                          const SizedBox(width: 15),
                          Switch(
                            value: _hasSecondPerson,
                            onChanged: (value) {
                              setState(() {
                                _hasSecondPerson = value;
                                _fieldsEnabled = value;
                              });
                            },
                            activeColor: Theme.of(context).primaryColor,
                          ),
                        ],
                      ),
                    ),
                    const SizedBox(height: 20),
                  ],
                  
                  Container(
                    width: screenSize.width * 0.6,
                    padding: const EdgeInsets.symmetric(vertical: 50, horizontal: 50),
                    constraints: const BoxConstraints(minHeight: 570),
                    decoration: BoxDecoration(
                      image: DecorationImage(
                        image: AssetImage(widget.cardColor.path),
                        fit: BoxFit.fill,
                      ),
                    ),
                    child: Form(
                      key: _formKey,
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Row(
                            children: [
                              Expanded(
                                flex: 12,
                                child: CustomAppTextField(
                                  controller: _lastNameController,
                                  labelText: 'Nom',
                                  hintText: 'Votre nom de famille',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled,
                                ),
                              ),
                              const Expanded(flex: 1, child: SizedBox()),
                              Expanded(
                                flex: 12,
                                child: CustomAppTextField(
                                  controller: _firstNameController,
                                  labelText: 'Prénom',
                                  hintText: 'Votre prénom',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled,
                                ),
                              ),
                            ],
                          ),
                          const SizedBox(height: 32),
                          Row(
                            children: [
                              Expanded(
                                flex: 12,
                                child: CustomAppTextField(
                                  controller: _phoneController,
                                  labelText: 'Téléphone',
                                  keyboardType: TextInputType.phone,
                                  hintText: 'Votre numéro de téléphone',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled,
                                ),
                              ),
                              const Expanded(flex: 1, child: SizedBox()),
                              Expanded(
                                flex: 12,
                                child: CustomAppTextField(
                                  controller: _emailController,
                                  labelText: 'Email',
                                  keyboardType: TextInputType.emailAddress,
                                  hintText: 'Votre adresse e-mail',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled,
                                ),
                              ),
                            ],
                          ),
                          const SizedBox(height: 32),
                          
                          // Checkbox "Même adresse" (uniquement pour Parent 2)
                          if (widget.showSameAddressCheckbox) ...[
                            AppCustomCheckbox(
                              label: 'Même adresse que le parent 1',
                              value: _sameAddress,
                              onChanged: _fieldsEnabled ? (value) {
                                setState(() {
                                  _sameAddress = value ?? false;
                                  _updateAddressFields();
                                });
                              } : null,
                            ),
                            const SizedBox(height: 20),
                          ],
                          
                          CustomAppTextField(
                            controller: _addressController,
                            labelText: 'Adresse (N° et Rue)',
                            hintText: 'Numéro et nom de votre rue',
                            style: CustomAppTextFieldStyle.beige,
                            fieldWidth: double.infinity,
                            labelFontSize: 22.0,
                            inputFontSize: 20.0,
                            enabled: _fieldsEnabled && !_sameAddress,
                          ),
                          const SizedBox(height: 32),
                          Row(
                            children: [
                              Expanded(
                                flex: 1,
                                child: CustomAppTextField(
                                  controller: _postalCodeController,
                                  labelText: 'Code Postal',
                                  keyboardType: TextInputType.number,
                                  hintText: 'Code postal',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled && !_sameAddress,
                                ),
                              ),
                              const Expanded(flex: 1, child: SizedBox()),
                              Expanded(
                                flex: 4,
                                child: CustomAppTextField(
                                  controller: _cityController,
                                  labelText: 'Ville',
                                  hintText: 'Votre ville',
                                  style: CustomAppTextFieldStyle.beige,
                                  fieldWidth: double.infinity,
                                  labelFontSize: 22.0,
                                  inputFontSize: 20.0,
                                  enabled: _fieldsEnabled && !_sameAddress,
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
          // Chevrons
          Positioned(
            top: screenSize.height / 2 - 20,
            left: 40,
            child: IconButton(
              icon: Transform(
                alignment: Alignment.center,
                transform: Matrix4.rotationY(math.pi),
                child: Image.asset('assets/images/chevron_right.png', height: 40),
              ),
              onPressed: () {
                if (context.canPop()) {
                  context.pop();
                } else {
                  context.go(widget.previousRoute);
                }
              },
              tooltip: 'Retour',
            ),
          ),
          Positioned(
            top: screenSize.height / 2 - 20,
            right: 40,
            child: IconButton(
              icon: Image.asset('assets/images/chevron_right.png', height: 40),
              onPressed: _handleSubmit,
              tooltip: 'Suivant',
            ),
          ),
        ],
      ),
    );
  }
}