/// BLoC pour la gestion des contributions
library contributions_bloc;

import 'package:flutter_bloc/flutter_bloc.dart';
import '../../../core/utils/logger.dart';
import '../data/models/contribution_model.dart';
import '../data/repositories/contribution_repository.dart';
import 'contributions_event.dart';
import 'contributions_state.dart';

/// BLoC pour gérer l'état des contributions via l'API backend
class ContributionsBloc extends Bloc<ContributionsEvent, ContributionsState> {
  final ContributionRepository _repository;

  ContributionsBloc(this._repository) : super(const ContributionsInitial()) {
    on<LoadContributions>(_onLoadContributions);
    on<LoadContributionById>(_onLoadContributionById);
    on<CreateContribution>(_onCreateContribution);
    on<UpdateContribution>(_onUpdateContribution);
    on<DeleteContribution>(_onDeleteContribution);
    on<SearchContributions>(_onSearchContributions);
    on<LoadContributionsByMembre>(_onLoadContributionsByMembre);
    on<LoadContributionsPayees>(_onLoadContributionsPayees);
    on<LoadContributionsNonPayees>(_onLoadContributionsNonPayees);
    on<LoadContributionsEnRetard>(_onLoadContributionsEnRetard);
    on<RecordPayment>(_onRecordPayment);
    on<LoadContributionsStats>(_onLoadContributionsStats);
    on<GenerateAnnualContributions>(_onGenerateAnnualContributions);
    on<SendPaymentReminder>(_onSendPaymentReminder);
  }

  Future<void> _onLoadContributions(
    LoadContributions event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      AppLogger.blocEvent('ContributionsBloc', 'LoadContributions', data: {
        'page': event.page,
        'size': event.size,
      });

      emit(const ContributionsLoading(message: 'Chargement des contributions...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));

      AppLogger.blocState('ContributionsBloc', 'ContributionsLoaded', data: {
        'count': result.contributions.length,
        'total': result.total,
      });
    } catch (e, stackTrace) {
      AppLogger.error('Erreur lors du chargement des contributions', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors du chargement des contributions', error: e));
    }
  }

  Future<void> _onLoadContributionById(
    LoadContributionById event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement de la contribution...'));
      final contribution = await _repository.getCotisationById(event.id);
      emit(ContributionDetailLoaded(contribution: contribution));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Contribution non trouvée', error: e));
    }
  }

  Future<void> _onCreateContribution(
    CreateContribution event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Création de la contribution...'));
      final created = await _repository.createCotisation(event.contribution);
      emit(ContributionCreated(contribution: created));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors de la création de la contribution', error: e));
    }
  }

  Future<void> _onUpdateContribution(
    UpdateContribution event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Mise à jour de la contribution...'));
      final updated = await _repository.updateCotisation(event.id, event.contribution);
      emit(ContributionUpdated(contribution: updated));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors de la mise à jour', error: e));
    }
  }

  Future<void> _onDeleteContribution(
    DeleteContribution event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Suppression de la contribution...'));
      await _repository.deleteCotisation(event.id);
      emit(ContributionDeleted(id: event.id));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors de la suppression', error: e));
    }
  }

  Future<void> _onSearchContributions(
    SearchContributions event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Recherche en cours...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
        membreId: event.membreId,
        statut: event.statut?.name,
        type: event.type?.name,
        annee: event.annee,
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors de la recherche', error: e));
    }
  }

  Future<void> _onLoadContributionsByMembre(
    LoadContributionsByMembre event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement des contributions du membre...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
        membreId: event.membreId,
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors du chargement', error: e));
    }
  }

  Future<void> _onLoadContributionsPayees(
    LoadContributionsPayees event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement des contributions payées...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
        statut: 'PAYEE',
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }

  Future<void> _onLoadContributionsNonPayees(
    LoadContributionsNonPayees event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement des contributions non payées...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
        statut: 'NON_PAYEE',
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }

  Future<void> _onLoadContributionsEnRetard(
    LoadContributionsEnRetard event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement des contributions en retard...'));

      final result = await _repository.getCotisations(
        page: event.page,
        size: event.size,
        statut: 'EN_RETARD',
      );

      emit(ContributionsLoaded(
        contributions: result.contributions,
        total: result.total,
        page: result.page,
        size: result.size,
        totalPages: result.totalPages,
      ));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }

  Future<void> _onRecordPayment(
    RecordPayment event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Enregistrement du paiement...'));

      final updated = await _repository.enregistrerPaiement(
        event.contributionId,
        montant: event.montant,
        datePaiement: event.datePaiement,
        methodePaiement: event.methodePaiement.name,
        numeroPaiement: event.numeroPaiement,
        referencePaiement: event.referencePaiement,
      );

      emit(PaymentRecorded(contribution: updated));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur lors de l\'enregistrement du paiement', error: e));
    }
  }

  Future<void> _onLoadContributionsStats(
    LoadContributionsStats event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Chargement des statistiques...'));
      final stats = await _repository.getStatistiques();
      emit(ContributionsStatsLoaded(stats: stats.map((k, v) => MapEntry(k, (v is num) ? v.toDouble() : 0.0))));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }

  Future<void> _onGenerateAnnualContributions(
    GenerateAnnualContributions event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Génération des contributions...'));
      final count = await _repository.genererCotisationsAnnuelles(event.annee);
      emit(ContributionsGenerated(nombreGenere: count));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }

  Future<void> _onSendPaymentReminder(
    SendPaymentReminder event,
    Emitter<ContributionsState> emit,
  ) async {
    try {
      emit(const ContributionsLoading(message: 'Envoi du rappel...'));
      await _repository.envoyerRappel(event.contributionId);
      emit(ReminderSent(contributionId: event.contributionId));
    } catch (e, stackTrace) {
      AppLogger.error('Erreur', error: e, stackTrace: stackTrace);
      emit(ContributionsError(message: 'Erreur', error: e));
    }
  }
}