import 'dart:io';

void main() {
  // القوائم لتخزين البيانات
  List<Map<String, double>> incomes = [];
  List<Map<String, double>> expenses = [];

  print("Welcome to Budget Manager!");

  while (true) { //
    print("\n1. Add Income");
    print("2. Add Expense");
    print("3. View Summary");
    print("4. Exit");
    stdout.write("Select: ");
    
    String? choice = stdin.readLineSync();

    if (choice == "1") {
      stdout.write("Income Description: ");
      String name = stdin.readLineSync()!;
      stdout.write("Amount: ");
      double money = double.parse(stdin.readLineSync()!);

      if (money > 0) {
        incomes.add({name: money}); // إضافة للقائمة
        print("Income Added!");
      }
    } 
    else if (choice == "2") {
      stdout.write("Expense Description: ");
      String name = stdin.readLineSync()!;
      stdout.write("Amount: ");
      double money = double.parse(stdin.readLineSync()!);

      if (money > 0) {
        expenses.add({name: money});
        print("Expense Added!");
      }
    } 
    else if (choice == "3") {
      double totalIn = 0;
      double totalEx = 0;

      // حساب المجموع
      for (var i in incomes) { totalIn = totalIn + i.values.first; }
      for (var e in expenses) { totalEx = totalEx + e.values.first; }

      double net = totalIn - totalEx;

      print("--- Summary ---");
      print("Total Income: \$$totalIn"); //
      print("Total Expenses: \$$totalEx");
      print("Net: \$$net");

      // حساب الضريبة
      if (net > 0) {
        double tax = net * 0.15;
        print("Tax to be paid: \$$tax");
      }
    } 
    else if (choice == "4") {
      print("Exiting application.");
      break;
    }
  }
}