import 'package:flutter/material.dart';

import 'package:pshared/service/pfe/service.dart';
import 'package:pshared/provider/exception.dart';
import 'package:pshared/provider/resource.dart';
import 'package:pshared/service/account.dart';


class PfeProvider extends ChangeNotifier {
  // The resource now wraps our Account? state along with its loading/error state.
  Resource<String?> _resource = Resource(data: null);
  Resource<String?> get resource => _resource;

  String? get session => _resource.data;
  bool get isLoggedIn => session != null;
  bool get isLoading => _resource.isLoading;
  Object? get error => _resource.error;

  // Private helper to update the resource and notify listeners.
  void _setResource(Resource<String?> newResource) {
    _resource = newResource;
    notifyListeners();
  }


  Future<String?> login({
    required String email,
    required String password,
  }) async {
    _setResource(_resource.copyWith(isLoading: true, error: null));
    try {
      final acc = await PfeService.login(email, password);
      _setResource(Resource(data: acc, isLoading: false));
      return acc;
    } catch (e) {
      _setResource(_resource.copyWith(isLoading: false, error: toException(e)));
      rethrow;
    }
  }

  Future<void> logout() async {
    _setResource(_resource.copyWith(isLoading: true, error: null));
    try {
      await AccountService.logout();
      _setResource(Resource(data: null, isLoading: false));
    } catch (e) {
      _setResource(_resource.copyWith(isLoading: false, error: toException(e)));
      rethrow;
    }
  }
}