import 'package:flutter/widgets.dart';
import 'package:seshat/data/repositories/bal_repository.dart';
import 'package:seshat/domain/models/bal.dart';
import 'package:seshat/utils/command.dart';
import 'package:seshat/utils/result.dart';

class BalViewModel extends ChangeNotifier {
  BalViewModel({required BalRepository balRepository, required this.id})
    : _balRepository = balRepository {
    load = Command0(_load)..execute();
  }

  final BalRepository _balRepository;

  Bal? _bal;
  int? id;
  Bal? get bal => _bal;
  bool isABalOngoing = false;

  Future<Result<void>> stopBal(int id) async {
    final result = await _balRepository.stopBal(id);
    switch (result) {
      case Ok():
        _bal = result.value;
        notifyListeners();
        break;
      default:
    }
    return result;
  }

  Future<Result<void>> startBal(int id) async {
    if (isABalOngoing) {
      return Result.error(Exception("Cannot have multiple BALs ongoing !"));
    }
    final result = await _balRepository.startBal(id);
    switch (result) {
      case Ok():
        _bal = result.value;
        notifyListeners();
        break;
      default:
    }
    return result;
  }

  Future<Result<void>> editBal(
    int id,
    String name,
    DateTime start,
    DateTime end,
  ) async {
    final result = await _balRepository.editBal(id, name, start, end);
    switch (result) {
      case Ok():
        debugPrint("\n\n\n\nDID EDIT\n\n\n\n");
        _bal = result.value;
        notifyListeners();
        break;
      case Error():
        debugPrint("\n\n\n\nERROR: ${result.error}");
        break;
    }
    return result;
  }

  /*
 * =================================
 * =====[ COMMAND AND LOADING ]=====
 * =================================
*/

  late final Command0 load;
  bool isLoaded = false;

  Future<Result<void>> _load() async {
    isABalOngoing = _balRepository.isABalOngoing();
    final result1 = await _loadBal();
    switch (result1) {
      case Ok():
        isLoaded = true;
        break;
      default:
        break;
    }
    notifyListeners();
    return result1;
  }

  Future<Result<void>> _loadBal() async {
    if (id == null) {
      return Result.error(Exception("No id given"));
    }
    final result = await _balRepository.balById(id!);
    switch (result) {
      case Ok():
        _bal = result.value;
        break;
      case Error():
        break;
    }

    return result;
  }
}