/// Dialog de création d'une demande d'aide
library create_demande_aide_dialog;

import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:get_it/get_it.dart';
import '../../../../core/utils/logger.dart';
import '../../../../shared/design_system/unionflow_design_system.dart';
import '../../bloc/solidarity_bloc.dart';
import '../../data/models/demande_aide_model.dart';
import '../../../organizations/domain/repositories/organization_repository.dart';
import '../../../organizations/data/models/organization_model.dart';
import '../../../members/data/models/membre_complete_model.dart';
import '../../../profile/domain/repositories/profile_repository.dart';

class CreateDemandeAideDialog extends StatefulWidget {
  final VoidCallback onCreated;

  const CreateDemandeAideDialog({super.key, required this.onCreated});

  @override
  State<CreateDemandeAideDialog> createState() => _CreateDemandeAideDialogState();
}

class _CreateDemandeAideDialogState extends State<CreateDemandeAideDialog> {
  final _formKey = GlobalKey<FormState>();
  final _titreController = TextEditingController();
  final _descriptionController = TextEditingController();
  final _justificationController = TextEditingController();
  final _montantController = TextEditingController();
  String? _organisationId;
  String? _type;
  List<OrganizationModel> _organisations = [];
  bool _loading = false;
  bool _isInitLoading = true;
  MembreCompletModel? _me;

  static const List<Map<String, String>> _types = [
    {'value': 'FINANCIERE', 'label': 'Financière'},
    {'value': 'MATERIELLE', 'label': 'Matérielle'},
    {'value': 'ALIMENTAIRE', 'label': 'Alimentaire'},
    {'value': 'MEDICALE', 'label': 'Médicale'},
    {'value': 'SCOLAIRE', 'label': 'Scolaire'},
    {'value': 'LOGEMENT', 'label': 'Logement'},
    {'value': 'AUTRE', 'label': 'Autre'},
  ];

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

  Future<void> _loadInitialData() async {
    try {
      final user = await GetIt.instance<IProfileRepository>().getMe();
      final orgRepo = GetIt.instance<IOrganizationRepository>();
      final list = await orgRepo.getOrganizations(page: 0, size: 100);
      if (mounted) {
        setState(() {
          _me = user;
          _organisations = list;
          _isInitLoading = false;
        });
      }
    } catch (e, st) {
      AppLogger.error('CreateDemandeAideDialog: chargement données initiales échoué', error: e, stackTrace: st);
      if (mounted) {
        setState(() {
          _isInitLoading = false;
        });
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Impossible de charger le profil ou les organisations. Réessayez.')),
        );
      }
    }
  }

  @override
  void dispose() {
    _titreController.dispose();
    _descriptionController.dispose();
    _justificationController.dispose();
    _montantController.dispose();
    super.dispose();
  }

  void _submit() {
    if (_me == null) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Profil non chargé, veuillez réessayer')),
      );
      return;
    }
    if (!_formKey.currentState!.validate()) return;
    final titre = _titreController.text.trim();
    final description = _descriptionController.text.trim();
    if (titre.isEmpty || description.isEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Titre et description obligatoires')),
      );
      return;
    }
    final montant = double.tryParse(_montantController.text.replaceAll(',', '.'));
    setState(() => _loading = true);
    final demande = DemandeAideModel(
      titre: titre,
      description: description,
      justification: _justificationController.text.trim().isEmpty
          ? null
          : _justificationController.text.trim(),
      type: _type,
      montantDemande: montant,
      organisationId: _organisationId,
      demandeurId: _me!.id,
      dateDemande: DateTime.now(),
      statut: 'BROUILLON',
    );
    context.read<SolidarityBloc>().add(CreateDemandeAide(demande));
    widget.onCreated();
    if (mounted) {
      setState(() => _loading = false);
      Navigator.of(context).pop();
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: const Text('Nouvelle demande d\'aide'),
      content: SingleChildScrollView(
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              if (_isInitLoading)
                const CircularProgressIndicator()
              else if (_me != null)
                TextFormField(
                  initialValue: '${_me!.prenom} ${_me!.nom}',
                  decoration: const InputDecoration(
                    labelText: 'Demandeur',
                    border: OutlineInputBorder(),
                    prefixIcon: Icon(Icons.person),
                  ),
                  enabled: false,
                )
              else
                const Text('Impossible de récupérer votre profil', style: TextStyle(color: AppColors.error)),
              const SizedBox(height: 12),
              TextFormField(
                controller: _titreController,
                decoration: const InputDecoration(
                  labelText: 'Titre *',
                  border: OutlineInputBorder(),
                ),
                validator: (v) => (v == null || v.trim().isEmpty) ? 'Obligatoire' : null,
                enabled: !_loading,
              ),
              const SizedBox(height: 12),
              TextFormField(
                controller: _descriptionController,
                decoration: const InputDecoration(
                  labelText: 'Description *',
                  border: OutlineInputBorder(),
                ),
                maxLines: 3,
                validator: (v) => (v == null || v.trim().isEmpty) ? 'Obligatoire' : null,
                enabled: !_loading,
              ),
              const SizedBox(height: 12),
              DropdownButtonFormField<String>(
                value: _type,
                decoration: const InputDecoration(
                  labelText: 'Type d\'aide',
                  border: OutlineInputBorder(),
                ),
                items: _types
                    .map((e) => DropdownMenuItem(
                          value: e['value'],
                          child: Text(e['label']!),
                        ))
                    .toList(),
                onChanged: _loading ? null : (v) => setState(() => _type = v),
              ),
              const SizedBox(height: 12),
              TextFormField(
                controller: _montantController,
                decoration: const InputDecoration(
                  labelText: 'Montant demandé (FCFA, optionnel)',
                  border: OutlineInputBorder(),
                ),
                keyboardType: const TextInputType.numberWithOptions(decimal: true),
                enabled: !_loading,
              ),
              const SizedBox(height: 12),
              TextFormField(
                controller: _justificationController,
                decoration: const InputDecoration(
                  labelText: 'Justification',
                  border: OutlineInputBorder(),
                ),
                maxLines: 2,
                enabled: !_loading,
              ),
              const SizedBox(height: 12),
              DropdownButtonFormField<String>(
                value: _organisationId,
                isExpanded: true,
                decoration: const InputDecoration(
                  labelText: 'Organisation',
                  border: OutlineInputBorder(),
                ),
                items: _organisations
                    .map((o) => DropdownMenuItem(
                          value: o.id,
                          child: Text(o.nom, overflow: TextOverflow.ellipsis, maxLines: 1),
                        ))
                    .toList(),
                onChanged: _loading ? null : (v) => setState(() => _organisationId = v),
              ),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: _loading ? null : () => Navigator.of(context).pop(),
          child: const Text('Annuler'),
        ),
        FilledButton(
          onPressed: _loading ? null : _submit,
          child: _loading
              ? const SizedBox(
                  width: 20,
                  height: 20,
                  child: CircularProgressIndicator(strokeWidth: 2),
                )
              : const Text('Créer'),
        ),
      ],
    );
  }
}