import java.util.Scanner;
import java.util.*;
class Bills
{
    private int consumerNumber;
    private double dueAmount;
    private double payableAmount;
    
    public Bills(int consumerNumber,double dueAmount, double payableAmount)
    {
        this.consumerNumber=consumerNumber;
        this.dueAmount=dueAmount;
        this.payableAmount=payableAmount;
    }
    
    public void setConsumerNumber(int consumerNumber)
    {
        this.consumerNumber=consumerNumber;
    }
    public int getConsumerNumber()
    {
        return this.consumerNumber;
    }
    public void setDueAmount(double dueAmount)
    {
        this.dueAmount=dueAmount;
    }
    public double getDueAmount()
    {
        return this.dueAmount;
    }
    public void setPayableAmount(double payableAmount)
    {
        this.payableAmount=payableAmount;
    }
    public double getPayableAmount()
    {
        return this.payableAmount;
    }
}
class BillDetails
{
    public static void main (String[] args)
    {
       Scanner scanner=new Scanner(System.in);
       System.out.println("How many bill details of customers do you want to enter?");
            int size=scanner.nextInt();
            Bills bill[]=new Bills[size];
       int option;
        do{
            System.out.println("1.Add Bill \n2.Update Amount Details \n3.Delete Bill Details\n4.Exit\nEnter Your Option :");
        option=scanner.nextInt();
        switch(option)
        {
            case 1:addBillDetails(bill);
                    break;
            case 2:updateAmountDetails(bill);
                    break;
            case 3:deleteAmountDetails(bill);
                    break;
            case 4:System.out.println("Exiting...");
                break;
            default:System.out.println("Entered Incorrect option.....");
        }
        }while(option!=4);
        
        
    }
    public static void addBillDetails(Bills bill[])
    {
             Scanner scanner=new Scanner(System.in);
             
            for(int i=0;i<bill.length;i++)
            {
                System.out.print("Enter Consumer Number :");
                int consumerNumber=scanner.nextInt();
                 System.out.print("Enter Due Amount :");
                double dueAmount=scanner.nextDouble();
                 System.out.print("Enter Payable Amount :");
                double payableAmount=scanner.nextDouble();
            
                 bill[i]= new Bills(consumerNumber,dueAmount,payableAmount);
                System.out.println("Bill details for  customer "+(i+1)+" added successfully");
             }
        
    }
    
    public static void updateAmountDetails(Bills bill[])
    {
        Scanner scanner=new Scanner(System.in);
        System.out.print("Enter Consumer Number :");
        int consumerNumber=scanner.nextInt();
        System.out.print("Enter Due Amount :");
        double dueAmount=scanner.nextDouble();
        System.out.print("Enter Payable Amount :");
        double payableAmount=scanner.nextDouble();
        
        for(int i=0;i<bill.length;i++)
        {
            if(bill[i].getConsumerNumber() == consumerNumber)
            {
                bill[i].setDueAmount(dueAmount);
                bill[i].setPayableAmount(payableAmount);
                System.out.println("Bill details updated successfully \nBill due amount :"+bill[i].getDueAmount()+"\nBill payable amount :"+bill[i].getPayableAmount());
            }
        }
    }
   public static void deleteAmountDetails(Bills bill[])
    {
        Scanner scanner=new Scanner(System.in);
        System.out.print("Enter consumer number :");
        int consumerNumber=scanner.nextInt();
        int size=bill.length;
         for(int i=0;i<size;i++)
        {
            if(bill[i].getConsumerNumber() == consumerNumber)
            {
               for(int j=i ; j<size-1;j++)
               {
                   bill[j]=bill[j+1];
               }
              size--;
                System.out.println("Bill details deleted successfully");
            }
            else{
                System.out.println("Bill details are not found");
            }
        }
        for(int i=0;i<size;i++)
        {
            System.out.println("Consumer "+(i+1)+" details are:\n"+"Consumer Number :"+bill[i].getConsumerNumber()+"\nDue Amount :"+bill[i].getDueAmount()+"\nPayable Amount :"+bill[i].getPayableAmount());
        }
    }
}