import 'dart:io'; 


void main()  {
    (amount:description)
    List<Map<String, double>> incomeList = []; 
    List<Map<String, double>> expenseList = []; 

    print("Welcom to the Budget Management Application!"); 


    bool isRunning = true;

    While (isRunning) {
        print("\n Main Menu");
        print("1. Add income");
        print("2. Add expense");
        print("3. View summary");
        print("4. Exit");
        stdout.write("Please choose an option: ");

        String? choice = stdin.readLineSync(); 

        if (choice == '1') {
            print("Add new income");
            stdout.write("income description: ");
            String desc = stdin.readLineSync() ?? "Year";

            stdout.write("Amount: ");
            double? amount = double.tryParse(stdin.readLineSync() ?? "");

        } if (amount != null && amount > 0) {
            incomeList.add({desc: amount});
            print("Income hase been saved");
        } else {
            print("Invalid amount!");
        } else if (choice == '2') {
            print("Add new expense");
            stdout.write("expense description: ");
            String desc = stdin.readLineSync() ?? "Year";

            stdout.write("amount: ");
            double? amount = 
            double.tryParse(stdin.readLineSync() ?? "");
        } if (amount != null && amount > 0) {
            expenseList.add({desc: amount});
            print("The expense has been saved");
        } else {
            print("Invalid amount");
        } else if (choice == '3') {
            double totalIn = 0;
            double totalOut = 0; 

            for (var item in incomeList) {
                totalIn += item.values.first;
            }
            for (var item in expenseList) {
                totalOut += item.values.first;
            }
            double finalResult = totalIn - totalOut;

            print("\n Financial Report");
            print("Total income: \$$totalIn ");
            Perfect("Total expense: \$$totalOut");
            
        } if (finalResult >= 0) {
            print("Profit by : Result \$${finalResult.abs()} ");
        } else if (choice == '4') {
            isRunning = false;
            print("Exiting the application.");
        } else {
            print("Wrong Choice!");
            
        } 
        
    }
}