/// Dialogue de création de contribution
library create_contribution_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/tokens/app_colors.dart';
import 'package:intl/intl.dart';
import '../../bloc/contributions_bloc.dart';
import '../../bloc/contributions_event.dart';
import '../../data/models/contribution_model.dart';
import '../../../members/data/models/membre_complete_model.dart';
import '../../../profile/domain/repositories/profile_repository.dart';


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

  @override
  State<CreateContributionDialog> createState() => _CreateContributionDialogState();
}

class _CreateContributionDialogState extends State<CreateContributionDialog> {
  final _formKey = GlobalKey<FormState>();
  final _montantController = TextEditingController();
  final _descriptionController = TextEditingController();

  ContributionType _selectedType = ContributionType.mensuelle;
  MembreCompletModel? _me;
  DateTime _dateEcheance = DateTime.now().add(const Duration(days: 30));
  bool _isLoading = false;
  bool _isInitLoading = true;

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

  Future<void> _loadMe() async {
    try {
      final user = await GetIt.instance<IProfileRepository>().getMe();
      if (mounted) {
        setState(() {
          _me = user;
          _isInitLoading = false;
        });
      }
    } catch (e, st) {
      AppLogger.error('CreateContributionDialog: chargement profil échoué', error: e, stackTrace: st);
      if (mounted) {
        setState(() {
          _isInitLoading = false;
        });
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Impossible de charger le profil. Réessayez.')),
        );
      }
    }
  }

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

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: const Text('Nouvelle contribution'),
      content: SizedBox(
        width: MediaQuery.of(context).size.width * 0.8,
        child: Form(
          key: _formKey,
          child: SingleChildScrollView(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                // Utilisateur connecté
                if (_isInitLoading)
                  const CircularProgressIndicator()
                else if (_me != null)
                  TextFormField(
                    initialValue: '${_me!.prenom} ${_me!.nom}',
                    decoration: const InputDecoration(
                      labelText: 'Membre',
                      border: OutlineInputBorder(),
                      prefixIcon: Icon(Icons.person),
                    ),
                    enabled: false, // Lecture seule
                  )
                else
                  const Text('Impossible de récupérer votre profil', style: TextStyle(color: AppColors.error)),
                const SizedBox(height: 16),
                
                // Type de contribution
                DropdownButtonFormField<ContributionType>(
                  value: _selectedType,
                  decoration: const InputDecoration(
                    labelText: 'Type de contribution',
                    border: OutlineInputBorder(),
                  ),
                  items: ContributionType.values.map((type) {
                    return DropdownMenuItem(
                      value: type,
                      child: Text(_getTypeLabel(type)),
                    );
                  }).toList(),
                  onChanged: (value) {
                    if (value != null) {
                      setState(() {
                        _selectedType = value;
                      });
                    }
                  },
                ),
                const SizedBox(height: 16),
                
                // Montant
                TextFormField(
                  controller: _montantController,
                  decoration: const InputDecoration(
                    labelText: 'Montant (FCFA)',
                    border: OutlineInputBorder(),
                    prefixIcon: Icon(Icons.attach_money),
                  ),
                  keyboardType: TextInputType.number,
                  validator: (value) {
                    if (value == null || value.isEmpty) {
                      return 'Veuillez saisir un montant';
                    }
                    if (double.tryParse(value) == null) {
                      return 'Montant invalide';
                    }
                    return null;
                  },
                ),
                const SizedBox(height: 16),
                
                // Date d'échéance
                InkWell(
                  onTap: () async {
                    final date = await showDatePicker(
                      context: context,
                      initialDate: _dateEcheance,
                      firstDate: DateTime.now(),
                      lastDate: DateTime.now().add(const Duration(days: 365)),
                    );
                    if (date != null) {
                      setState(() {
                        _dateEcheance = date;
                      });
                    }
                  },
                  child: InputDecorator(
                    decoration: const InputDecoration(
                      labelText: 'Date d\'échéance',
                      border: OutlineInputBorder(),
                      prefixIcon: Icon(Icons.calendar_today),
                    ),
                    child: Text(
                      DateFormat('dd/MM/yyyy').format(_dateEcheance),
                    ),
                  ),
                ),
                const SizedBox(height: 16),
                
                // Description
                TextFormField(
                  controller: _descriptionController,
                  decoration: const InputDecoration(
                    labelText: 'Description (optionnel)',
                    border: OutlineInputBorder(),
                    prefixIcon: Icon(Icons.description),
                  ),
                  maxLines: 3,
                ),
              ],
            ),
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.pop(context),
          child: const Text('Annuler'),
        ),
        ElevatedButton(
          onPressed: _isLoading ? null : _createContribution,
          child: _isLoading
              ? const SizedBox(
                  width: 16,
                  height: 16,
                  child: CircularProgressIndicator(strokeWidth: 2),
                )
              : const Text('Créer'),
        ),
      ],
    );
  }

  String _getTypeLabel(ContributionType type) {
    switch (type) {
      case ContributionType.mensuelle:
        return 'Mensuelle';
      case ContributionType.trimestrielle:
        return 'Trimestrielle';
      case ContributionType.semestrielle:
        return 'Semestrielle';
      case ContributionType.annuelle:
        return 'Annuelle';
      case ContributionType.exceptionnelle:
        return 'Exceptionnelle';
    }
  }

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

    if (_me == null) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Profil non chargé'),
          backgroundColor: AppColors.error,
        ),
      );
      return;
    }

    setState(() {
      _isLoading = true;
    });

    final membre = _me!;
    String? organisationId = membre.organisationId?.trim().isNotEmpty == true
        ? membre.organisationId
        : null;
    String? organisationNom = membre.organisationNom;


    if (organisationId == null || organisationId.isEmpty) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Aucune organisation disponible. Le membre et l\'utilisateur connecté doivent être rattachés à une organisation.'),
          backgroundColor: AppColors.error,
        ),
      );
      setState(() => _isLoading = false);
      return;
    }

    final contribution = ContributionModel(
      membreId: membre.id!,
      membreNom: membre.nom,
      membrePrenom: membre.prenom,
      organisationId: organisationId,
      organisationNom: organisationNom,
      type: _selectedType,
      annee: DateTime.now().year,
      montant: double.parse(_montantController.text),
      dateEcheance: _dateEcheance,
      description: _descriptionController.text.isNotEmpty ? _descriptionController.text : null,
      statut: ContributionStatus.nonPayee,
      dateCreation: DateTime.now(),
      dateModification: DateTime.now(),
    );

    context.read<ContributionsBloc>().add(CreateContribution(contribution: contribution));
    Navigator.pop(context);

    ScaffoldMessenger.of(context).showSnackBar(
      const SnackBar(
        content: Text('Contribution créée avec succès'),
        backgroundColor: AppColors.success,
      ),
    );
  }
}