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package bean;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

/**
 *
 * @author cmpkwhit
 */
@ManagedBean
@RequestScoped
public class CalculatorBean {

    /**
     * Creates a new instance of CalculatorBean
     */
    public CalculatorBean() {
    }
    //properties
    private Integer firstOperand=null;
    private Integer secondOperand=null;
    private Integer thirdOperand=null;
    private Integer fourthOperand=null;
    private Integer operation=null;
    private Integer operation2 = null;
    private Integer sum = null;
    private Integer result=null;
   private Integer result1 = null;



    //methods
    public Integer getFirstOperand() {
        return firstOperand;
    }

    public Integer getResult1() {
        return result1;
    }

    public void setResult1(Integer result1) {
        this.result1 = result1;
    }

    public void setFirstOperand(Integer firstOperand) {
        this.firstOperand = firstOperand;
    }

    public Integer getSecondOperand() {
        return secondOperand;
    }

    public void setSecondOperand(Integer secondOperand) {
        this.secondOperand = secondOperand;
    }

    public Integer getOperation() {
        return operation;
    }

    public void setOperation(Integer operand) {
        this.operation = operand;
    }

    public Integer getResult() {
        return result;
    }

    public void setResult(Integer result) {
        this.result = result;
    }

    public Integer getOperation2() {
        return operation2;
    }

    public void setOperation2(Integer operation2) {
        this.operation2 = operation2;
    }


    public Integer getThirdOperand() {
        return thirdOperand;
    }

    public void setThirdOperand(Integer thirdOperand) {
        this.thirdOperand = thirdOperand;
    }

    public Integer getFourthOperand() {
        return fourthOperand;
    }

    public void setFourthOperand(Integer fourthOperand) {
        this.fourthOperand = fourthOperand;
    }

    public Integer getSum() {
        return sum;
    }

    public void setSum(Integer sum) {
        this.sum = sum;
    }

    public String calculate() {
        if(this.operation!=null && this.firstOperand !=null && this.secondOperand !=null) {
            if(this.operation==1) this.result1=this.firstOperand+this.secondOperand;
            if(this.operation==2) this.result1=this.firstOperand-this.secondOperand;
            if(this.operation==3) this.result1=this.firstOperand*this.secondOperand;
            if(this.operation==4) this.result1=this.firstOperand/this.secondOperand;
            setSum(result1);
            calculateNext();
        }
        return null;
    }

     public String calculateNext() {
        if(this.operation2!=null && this.sum !=null && this.thirdOperand !=null) {
            if(this.operation2==1) this.result=this.sum+this.thirdOperand;
            if(this.operation2==2) this.result=this.sum-this.thirdOperand;
            if(this.operation2==3) this.result=this.sum*this.thirdOperand;
            if(this.operation2==4) this.result=this.sum/this.thirdOperand;
        }
        return null;
    }

    public String about() {
        return "about";
    }
}