ENCAPSULATION CHALLENGE

package com.cnc;

public class Main {

    public static void main(String[] args) {
      Printer printer = new Printer(50,true);
      System.out.println("Initial Page count is "+ printer.getNumberOfPages());

      int pagesPrinted = printer.getNumberOfPages(4);
    }
}

package com.cnc;

public class Printer {
    private int tonerLevel = 100;
    private int numberOfPages;
    private boolean isDuplex;

    public Printer(int tonerLevel, boolean isDuplex) {
        if(tonerLevel>=-1 && tonerLevel<=100) {
            this.tonerLevel = tonerLevel;
        }else{
            this.tonerLevel=-1;
        }
        this.isDuplex = isDuplex;
        this.numberOfPages = 0;
    }

    public int addToner(int tonerAmount){
        if(tonerAmount>0 && tonerAmount<=100 ){
            if(this.tonerLevel +tonerAmount > 100){
                return -1;
            }
            this.tonerLevel += tonerAmount;
            return this.tonerLevel;
        }else {
            return -1;
        }
    }
    public int printPages(int pages){
        int pagesToPrint  = pages;
        if(this.isDuplex){
            pagesToPrint=(pages/2)+(pages%2);
            System.out.println("Printing in duplex mode");
        }
        this.numberOfPages += pagesToPrint;
        return pagesToPrint;
    }


    public Printer(int numberOfPages) {
        this.numberOfPages = numberOfPages;

    }
    public int getNumberOfPages() {
        return numberOfPages;
    }

}

}