import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:go_router/go_router.dart';
import 'package:intl/intl.dart';
import 'dart:math' as math;
import 'dart:io';
import '../models/card_assets.dart';
import '../config/display_config.dart';
import 'custom_app_text_field.dart';
import 'app_custom_checkbox.dart';
import 'hover_relief_widget.dart';
import 'custom_navigation_button.dart';

/// Données pour le formulaire d'informations professionnelles
class ProfessionalInfoData {
  final String? photoPath;
  final File? photoFile;
  final bool photoConsent;
  final DateTime? dateOfBirth;
  final String birthCity;
  final String birthCountry;
  final String nir;
  final String agrementNumber;
  final int? capacity;

  ProfessionalInfoData({
    this.photoPath,
    this.photoFile,
    this.photoConsent = false,
    this.dateOfBirth,
    this.birthCity = '',
    this.birthCountry = '',
    this.nir = '',
    this.agrementNumber = '',
    this.capacity,
  });
}

/// Widget générique pour le formulaire d'informations professionnelles
/// Utilisé pour l'inscription des Assistantes Maternelles
/// Supporte mode éditable et readonly, responsive mobile/desktop
class ProfessionalInfoFormScreen extends StatefulWidget {
  final DisplayMode mode;
  final String stepText;
  final String title;
  final CardColorHorizontal cardColor;
  final ProfessionalInfoData? initialData;
  final String previousRoute;
  final Function(ProfessionalInfoData) onSubmit;
  final Future<void> Function()? onPickPhoto;

  const ProfessionalInfoFormScreen({
    super.key,
    this.mode = DisplayMode.editable,
    required this.stepText,
    required this.title,
    required this.cardColor,
    this.initialData,
    required this.previousRoute,
    required this.onSubmit,
    this.onPickPhoto,
  });

  @override
  State<ProfessionalInfoFormScreen> createState() => _ProfessionalInfoFormScreenState();
}

class _ProfessionalInfoFormScreenState extends State<ProfessionalInfoFormScreen> {
  final _formKey = GlobalKey<FormState>();
  
  final _dateOfBirthController = TextEditingController();
  final _birthCityController = TextEditingController();
  final _birthCountryController = TextEditingController();
  final _nirController = TextEditingController();
  final _agrementController = TextEditingController();
  final _capacityController = TextEditingController();
  
  DateTime? _selectedDate;
  String? _photoPathFramework;
  File? _photoFile;
  bool _photoConsent = false;

  @override
  void initState() {
    super.initState();
    
    final data = widget.initialData;
    if (data != null) {
      _selectedDate = data.dateOfBirth;
      _dateOfBirthController.text = data.dateOfBirth != null 
          ? DateFormat('dd/MM/yyyy').format(data.dateOfBirth!) 
          : '';
      _birthCityController.text = data.birthCity;
      _birthCountryController.text = data.birthCountry;
      _nirController.text = data.nir;
      _agrementController.text = data.agrementNumber;
      _capacityController.text = data.capacity?.toString() ?? '';
      _photoPathFramework = data.photoPath;
      _photoFile = data.photoFile;
      _photoConsent = data.photoConsent;
    }
  }

  @override
  void dispose() {
    _dateOfBirthController.dispose();
    _birthCityController.dispose();
    _birthCountryController.dispose();
    _nirController.dispose();
    _agrementController.dispose();
    _capacityController.dispose();
    super.dispose();
  }

  Future<void> _selectDate(BuildContext context) async {
    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: _selectedDate ?? DateTime.now().subtract(const Duration(days: 365 * 25)),
      firstDate: DateTime(1920, 1),
      lastDate: DateTime.now().subtract(const Duration(days: 365 * 18)),
      locale: const Locale('fr', 'FR'),
    );
    if (picked != null && picked != _selectedDate) {
      setState(() {
        _selectedDate = picked;
        _dateOfBirthController.text = DateFormat('dd/MM/yyyy').format(picked);
      });
    }
  }

  Future<void> _pickPhoto() async {
    if (widget.onPickPhoto != null) {
      await widget.onPickPhoto!();
    } else {
      // Comportement par défaut : utiliser un asset de test
      setState(() {
        _photoPathFramework = 'assets/images/icon_assmat.png';
        _photoFile = null;
      });
    }
  }

  void _submitForm() {
    if (_formKey.currentState!.validate()) {
      if (_photoPathFramework != null && !_photoConsent) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Veuillez accepter le consentement photo pour continuer.')),
        );
        return;
      }

      final data = ProfessionalInfoData(
        photoPath: _photoPathFramework,
        photoFile: _photoFile,
        photoConsent: _photoConsent,
        dateOfBirth: _selectedDate,
        birthCity: _birthCityController.text,
        birthCountry: _birthCountryController.text,
        nir: _nirController.text,
        agrementNumber: _agrementController.text,
        capacity: int.tryParse(_capacityController.text),
      );
      
      widget.onSubmit(data);
    }
  }

  @override
  Widget build(BuildContext context) {
    final screenSize = MediaQuery.of(context).size;
    final config = DisplayConfig.fromContext(context, mode: widget.mode);

    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(
                    widget.stepText,
                    style: GoogleFonts.merienda(
                      fontSize: config.isMobile ? 13 : 16,
                      color: Colors.black54,
                    ),
                  ),
                  SizedBox(height: config.isMobile ? 6 : 10),
                  Text(
                    widget.title,
                    style: GoogleFonts.merienda(
                      fontSize: config.isMobile ? 18 : 24,
                      fontWeight: FontWeight.bold,
                      color: Colors.black87,
                    ),
                    textAlign: TextAlign.center,
                  ),
                  SizedBox(height: config.isMobile ? 16 : 30),
                  Container(
                    width: config.isMobile ? screenSize.width * 0.9 : screenSize.width * 0.6,
                    padding: EdgeInsets.symmetric(
                      vertical: config.isMobile ? 20 : 50,
                      horizontal: config.isMobile ? 24 : 50,
                    ),
                    decoration: BoxDecoration(
                      image: DecorationImage(
                        image: AssetImage(
                          config.isMobile
                              ? _getVerticalCardAsset()
                              : widget.cardColor.path
                        ),
                        fit: BoxFit.fill,
                      ),
                    ),
                    child: Form(
                      key: _formKey,
                      child: config.isMobile
                          ? _buildMobileFields(context, config)
                          : _buildDesktopFields(context, config),
                    ),
                  ),
                  // Boutons mobile sous la carte
                  if (config.isMobile) ...[
                    const SizedBox(height: 20),
                    _buildMobileButtons(context, config, screenSize),
                    const SizedBox(height: 10),
                  ],
                ],
              ),
            ),
          ),
          // Chevrons desktop uniquement
          if (!config.isMobile) ...[
            // Chevron Gauche (Retour)
            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: 'Précédent',
              ),
            ),
            // Chevron Droit (Suivant)
            Positioned(
              top: screenSize.height / 2 - 20,
              right: 40,
              child: IconButton(
                icon: Image.asset('assets/images/chevron_right.png', height: 40),
                onPressed: _submitForm,
                tooltip: 'Suivant',
              ),
            ),
          ],
        ],
      ),
    );
  }

  /// Layout DESKTOP : Photo à gauche, champs à droite
  Widget _buildDesktopFields(BuildContext context, DisplayConfig config) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        Row(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // Photo + Checkbox à gauche
            SizedBox(
              width: 300,
              child: _buildPhotoSection(context, config),
            ),
            const SizedBox(width: 30),
            // Champs à droite
            Expanded(
              child: Column(
                children: [
                  _buildField(
                    config: config,
                    label: 'Ville de naissance',
                    controller: _birthCityController,
                    hint: 'Votre ville de naissance',
                    validator: (v) => v!.isEmpty ? 'Ville requise' : null,
                  ),
                  const SizedBox(height: 32),
                  _buildField(
                    config: config,
                    label: 'Pays de naissance',
                    controller: _birthCountryController,
                    hint: 'Votre pays de naissance',
                    validator: (v) => v!.isEmpty ? 'Pays requis' : null,
                  ),
                  const SizedBox(height: 32),
                  _buildField(
                    config: config,
                    label: 'Date de naissance',
                    controller: _dateOfBirthController,
                    hint: 'JJ/MM/AAAA',
                    readOnly: true,
                    onTap: () => _selectDate(context),
                    suffixIcon: Icons.calendar_today,
                    validator: (v) => _selectedDate == null ? 'Date requise' : null,
                  ),
                ],
              ),
            ),
          ],
        ),
        const SizedBox(height: 32),
        _buildField(
          config: config,
          label: 'N° Sécurité Sociale (NIR)',
          controller: _nirController,
          hint: 'Votre NIR à 13 chiffres',
          keyboardType: TextInputType.number,
          validator: (v) {
            if (v == null || v.isEmpty) return 'NIR requis';
            if (v.length != 13) return 'Le NIR doit contenir 13 chiffres';
            if (!RegExp(r'^[1-3]').hasMatch(v[0])) return 'Le NIR doit commencer par 1, 2 ou 3';
            return null;
          },
        ),
        const SizedBox(height: 32),
        Row(
          children: [
            Expanded(
              child: _buildField(
                config: config,
                label: 'N° d\'agrément',
                controller: _agrementController,
                hint: 'Votre numéro d\'agrément',
                validator: (v) => v!.isEmpty ? 'Agrément requis' : null,
              ),
            ),
            const SizedBox(width: 20),
            Expanded(
              child: _buildField(
                config: config,
                label: 'Capacité d\'accueil',
                controller: _capacityController,
                hint: 'Ex: 3',
                keyboardType: TextInputType.number,
                validator: (v) {
                  if (v == null || v.isEmpty) return 'Capacité requise';
                  final n = int.tryParse(v);
                  if (n == null || n <= 0) return 'Nombre invalide';
                  return null;
                },
              ),
            ),
          ],
        ),
      ],
    );
  }

  /// Layout MOBILE : Tout empilé verticalement
  Widget _buildMobileFields(BuildContext context, DisplayConfig config) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        // Photo + Checkbox en premier
        _buildPhotoSection(context, config),
        const SizedBox(height: 20),
        
        _buildField(
          config: config,
          label: 'Ville de naissance',
          controller: _birthCityController,
          hint: 'Votre ville de naissance',
          validator: (v) => v!.isEmpty ? 'Ville requise' : null,
        ),
        const SizedBox(height: 12),
        
        _buildField(
          config: config,
          label: 'Pays de naissance',
          controller: _birthCountryController,
          hint: 'Votre pays de naissance',
          validator: (v) => v!.isEmpty ? 'Pays requis' : null,
        ),
        const SizedBox(height: 12),
        
        _buildField(
          config: config,
          label: 'Date de naissance',
          controller: _dateOfBirthController,
          hint: 'JJ/MM/AAAA',
          readOnly: true,
          onTap: () => _selectDate(context),
          suffixIcon: Icons.calendar_today,
          validator: (v) => _selectedDate == null ? 'Date requise' : null,
        ),
        const SizedBox(height: 12),
        
        _buildField(
          config: config,
          label: 'N° Sécurité Sociale (NIR)',
          controller: _nirController,
          hint: 'Votre NIR à 13 chiffres',
          keyboardType: TextInputType.number,
          validator: (v) {
            if (v == null || v.isEmpty) return 'NIR requis';
            if (v.length != 13) return 'Le NIR doit contenir 13 chiffres';
            if (!RegExp(r'^[1-3]').hasMatch(v[0])) return 'Le NIR doit commencer par 1, 2 ou 3';
            return null;
          },
        ),
        const SizedBox(height: 12),
        
        _buildField(
          config: config,
          label: 'N° d\'agrément',
          controller: _agrementController,
          hint: 'Votre numéro d\'agrément',
          validator: (v) => v!.isEmpty ? 'Agrément requis' : null,
        ),
        const SizedBox(height: 12),
        
        _buildField(
          config: config,
          label: 'Capacité d\'accueil',
          controller: _capacityController,
          hint: 'Ex: 3',
          keyboardType: TextInputType.number,
          validator: (v) {
            if (v == null || v.isEmpty) return 'Capacité requise';
            final n = int.tryParse(v);
            if (n == null || n <= 0) return 'Nombre invalide';
            return null;
          },
        ),
      ],
    );
  }

  /// Section photo + checkbox
  Widget _buildPhotoSection(BuildContext context, DisplayConfig config) {
    final Color baseCardColorForShadow = Colors.green.shade300;
    final Color initialPhotoShadow = baseCardColorForShadow.withAlpha(90);
    final Color hoverPhotoShadow = baseCardColorForShadow.withAlpha(130);

    ImageProvider? currentImageProvider;
    if (_photoFile != null) {
      currentImageProvider = FileImage(_photoFile!);
    } else if (_photoPathFramework != null && _photoPathFramework!.startsWith('assets/')) {
      currentImageProvider = AssetImage(_photoPathFramework!);
    }

    final photoSize = config.isMobile ? 200.0 : 270.0;

    return Column(
      crossAxisAlignment: CrossAxisAlignment.center,
      children: [
        HoverReliefWidget(
          onPressed: _pickPhoto,
          borderRadius: BorderRadius.circular(10.0),
          initialShadowColor: initialPhotoShadow,
          hoverShadowColor: hoverPhotoShadow,
          child: SizedBox(
            height: photoSize,
            width: photoSize,
            child: Container(
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(8),
                image: currentImageProvider != null 
                    ? DecorationImage(image: currentImageProvider, fit: BoxFit.cover)
                    : null,
              ),
              child: currentImageProvider == null 
                  ? Image.asset('assets/images/photo.png', fit: BoxFit.contain)
                  : null,
            ),
          ),
        ),
        const SizedBox(height: 10),
        AppCustomCheckbox(
          label: 'J\'accepte l\'utilisation\nde ma photo.',
          value: _photoConsent,
          onChanged: (val) => setState(() => _photoConsent = val ?? false),
        ),
      ],
    );
  }

  /// Construit un champ individuel
  Widget _buildField({
    required DisplayConfig config,
    required String label,
    required TextEditingController controller,
    String? hint,
    TextInputType? keyboardType,
    bool readOnly = false,
    VoidCallback? onTap,
    IconData? suffixIcon,
    String? Function(String?)? validator,
  }) {
    return CustomAppTextField(
      controller: controller,
      labelText: label,
      hintText: hint ?? label,
      fieldWidth: double.infinity,
      fieldHeight: config.isMobile ? 45.0 : 53.0,
      labelFontSize: config.isMobile ? 15.0 : 22.0,
      inputFontSize: config.isMobile ? 14.0 : 20.0,
      keyboardType: keyboardType ?? TextInputType.text,
      readOnly: readOnly,
      onTap: onTap,
      suffixIcon: suffixIcon,
      validator: validator,
    );
  }

  /// Boutons mobile
  Widget _buildMobileButtons(BuildContext context, DisplayConfig config, Size screenSize) {
    return Padding(
      padding: EdgeInsets.symmetric(
        horizontal: screenSize.width * 0.05,
      ),
      child: Row(
        children: [
          Expanded(
            child: HoverReliefWidget(
              child: CustomNavigationButton(
                text: 'Précédent',
                style: NavigationButtonStyle.purple,
                onPressed: () {
                  if (context.canPop()) {
                    context.pop();
                  } else {
                    context.go(widget.previousRoute);
                  }
                },
                width: double.infinity,
                height: 50,
                fontSize: 16,
              ),
            ),
          ),
          const SizedBox(width: 16),
          Expanded(
            child: HoverReliefWidget(
              child: CustomNavigationButton(
                text: 'Suivant',
                style: NavigationButtonStyle.green,
                onPressed: _submitForm,
                width: double.infinity,
                height: 50,
                fontSize: 16,
              ),
            ),
          ),
        ],
      ),
    );
  }

  /// Retourne l'asset de carte vertical correspondant à la couleur
  String _getVerticalCardAsset() {
    switch (widget.cardColor) {
      case CardColorHorizontal.blue:
        return CardColorVertical.blue.path;
      case CardColorHorizontal.green:
        return CardColorVertical.green.path;
      case CardColorHorizontal.lavender:
        return CardColorVertical.lavender.path;
      case CardColorHorizontal.lime:
        return CardColorVertical.lime.path;
      case CardColorHorizontal.peach:
        return CardColorVertical.peach.path;
      case CardColorHorizontal.pink:
        return CardColorVertical.pink.path;
      case CardColorHorizontal.red:
        return CardColorVertical.red.path;
    }
  }
}