import 'dart:math';

import 'package:intl/intl.dart';

import 'main.dart';

class WeekManager {
  DateTime deadline;
  DateTime currentDate;
  Weekday _currentDay;

  WeekManager(this.deadline)
      : currentDate = DateTime.now(),
        _currentDay = _getCurrentDayOfWeek(DateTime.now());

  Weekday get currentDay => _currentDay;

  static Weekday _getCurrentDayOfWeek(DateTime date) {
    switch (date.weekday) {
      case 1:
        return Weekday.Monday;
      case 2:
        return Weekday.Tuesday;
      case 3:
        return Weekday.Wednesday;
      case 4:
        return Weekday.Thursday;
      case 5:
        return Weekday.Friday;
      case 6:
        return Weekday.Saturday;
      case 7:
        return Weekday.Sunday;
      default:
        return Weekday.Monday;
    }
  }

  int get daysUntilDeadline {
    return deadline.difference(currentDate).inDays;
  }

  String get formattedDeadline {
    DateFormat formatter = DateFormat('dd-MM-yyyy');
    return formatter.format(deadline);
  }

  String get formattedCurrentDate {
    DateFormat formatter = DateFormat('dd-MM-yyyy');
    return formatter.format(currentDate);
  }

  void updateCurrentDay() {
    _currentDay = _getCurrentDayOfWeek(currentDate);
  }

  void updateCurrentDate() {
    final random = Random();
    currentDate = DateTime.now().add(Duration(days: random.nextInt(365)));
  }

  void incrementCurrentDate() {
    currentDate = currentDate.add(const Duration(days: 1));
  }
}