import 'dart:io';
void main(){
Map<String, double> incomes ={};
Map<String, double> expenses ={};

    print("welcome to Budget Managment Aplication");
    while(true){
    print("1. Add income");
    print("2. Add expense");
    print("3. View summary");
    print("4.Exit");
    print("Enter your choice");
    String? choice = stdin.readLineSync();
    if (choice=="1") {
        print("Enter income source: ");
        String? source = stdin.readLineSync();
        double amount = 0;
        while(true){
        print("Enter income amount");
        String? input = stdin.readLineSync();
        double? value = double.tryParse(input??"");
        
        if (value!=null && value>0){
            amount=value;
     break;
    } else{
        print("please enter avalid positive mumber!");
    }
        }
    incomes[source?? "unnamd Income"] = amount;
 } else if(choice =="2"){

    print ("enter expense description :");
    String?desc= stdin.readLineSync();
    double? amount;
    while (true) {
      
print("Enter expens amount");
      String? input = stdin.readLineSync();
        amount= double.parse(input?? "");
        if ( amount>0) break;
    }print("please enter avalid positive mumber!");
    
    expenses[desc??"unnamd expese" ]= amount;
     }else if(choice =="3"){
    double totalincome =incomes.values.fold(0,(sum,amount)=> sum + amount);
    double totalexpense = expenses.values.fold(0,(sum , amount)=>sum + amount);
    double net = totalincome -totalexpense;

    print(".....budget Summary.....");
    print("Total income : ${totalincome}");
    print("total expense:${totalexpense}");
    print("net profit : ${net}");
    
    if (net>0){
        double tax =net * 0.15 ;
        print("tax(15%): $tax");
     } else 
         
            print("no profit no tax");
       }else if (choice=="4"){
        print ("Exiting the program . Goodbye!");
        }break;
        }
    }