Game Voucher

import 'dart:io';

void main(){
  var ordervoucher = orderVoucher();

  ordervoucher.topUp();
}


class GameVoucher{
  String gameName;
  double price;

  GameVoucher(this.gameName, this.price);

  @override
  String toString(){
    return "Game Name : $gameName\t Price : Rp. $price.00";
  }
}

class orderVoucher{
  List <GameVoucher> gameVoucher =[];

  orderVoucher(){
    gameVoucher.add(GameVoucher('PUBG', 350000));
    gameVoucher.add(GameVoucher('Fortnite', 450000));
    gameVoucher.add(GameVoucher('Freefire', 55000));
    gameVoucher.add(GameVoucher('CODM', 660000));
  }

  void displayMenu(){
    print("====-----=======------");
    for (var i = 0; i < gameVoucher.length; i++) {
      print("${i + 1}. ${gameVoucher[i]}");
    }
    print("====-----=======------");
  }

  GameVoucher gameSelection(){
    displayMenu();
    stdout.write("Masukkan pilihan Game Anda [1/2/3/4] : ");
    int choice = int.parse(stdin.readLineSync()!);
    if(choice > 5 && choice < 1){
      throw Exception("Pilihan Game Tidak valid!");
    }
    return gameVoucher[choice - 1];
  }

  int voucherNumber(){
    stdout.write("Jumlah voucher yang akan dibeli : ");
    int jlh = int.parse(stdin.readLineSync()!);
    return jlh;
  }



  String paymentSelection(){
    stdout.writeln("1. Transfer Bank");
    stdout.writeln("2. QRIS");
    stdout.write("Masukkan Jenis Pembayaran : ");
    var payMethod = stdin.readLineSync()!;
    return payMethod;
  }

  void topUp(){
    try {
      var selectedGame = gameSelection();
      var voucherNumz = voucherNumber();
      var methodPayment = paymentSelection();

      print("You order ${voucherNumz} ${selectedGame.gameName} vouchers for Rp. ${selectedGame.price * voucherNumz} by ${methodPayment}");
    } catch (e) {
      print(e);
    }
  }
}