abstract class Ride {
  bool ride();
}

abstract class Train implements Ride {
  bool ride() {
    // pociag nie jezdzi sam bez rozkladu
    return false;
  }
}

mixin Pon on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 1;
  }
}

mixin Wt on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 2;
  }
}

mixin Sr on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 3;
  }
}

mixin Czw on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 4;
  }
}

mixin Pt on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 5;
  }
}

mixin Sob on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 6;
  }
}

mixin Nd on Ride {
  bool ride() {
    return super.ride() || DateTime.now().weekday == 7;
  }
}

class Tygodniowy extends Train with Pon, Wt, Sr, Czw, Pt, Sob, Nd {}

class Weekendowy extends Train with Sob, Nd {}

class WTygodniu extends Train with Pon, Wt, Sr, Czw, Pt {}

class Srodowy extends Train with Sr {}

void main() {
  print('ktory pociag przyjezdza');
  print('tygodniowy ${Tygodniowy().ride()}');
  print('weekendowy ${Weekendowy().ride()}');
  print('w tygodniu ${WTygodniu().ride()}');
  print('srodowy ${Srodowy().ride()}');
}