public class CalculatorController {
	private CalculatorModel cm;
	private CalculatorFrame cv;
	private int operatorIndex = 0;

	public CalculatorController(CalculatorModel m, CalculatorFrame v) {
		cm = m;
		cv = v;
	}

	public void initController() {
		cv.getBtn0().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "0"));
		cv.getBtn1().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "1"));
        cv.getBtn2().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "2"));
		cv.getBtn3().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "3"));
		cv.getBtn4().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "4"));
		cv.getBtn5().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "5"));
		cv.getBtn6().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "6"));
		cv.getBtn7().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "7"));
		cv.getBtn8().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "8"));
		cv.getBtn9().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "9"));
		cv.getBtnDot().addActionListener(e -> cv.setTextFieldText(cv.getTextFieldText() + "."));

		cv.getBtnDiv().addActionListener(e -> {
		    cm.calculate(newNumber());
            cm.setLastOperator("/");
            operatorIndex = cv.getTextFieldText().length();
            System.out.println("Model Result: " + cm.getResult()); //Why you giving 0?!?!
            System.out.println("Operator Index: " + operatorIndex);

            cv.setTextFieldText(cv.getTextFieldText() + "/");
        });

		cv.getBtnSub().addActionListener(e -> {
            cm.setLastOperator("-");
            operatorIndex = cv.getTextFieldText().length() - 1;
        });

		cv.getBtnAdd().addActionListener(e -> {
            cm.setLastOperator("+");
            operatorIndex = cv.getTextFieldText().length() - 1;
        });

		cv.getBtnMul().addActionListener(e -> {
            cm.setLastOperator("*");
            operatorIndex = cv.getTextFieldText().length() - 1;
        });

		cv.getBtnEqu().addActionListener(e -> {
            cm.calculate(newNumber());
            cm.setLastOperator("=");
            cv.setTextFieldText(cv.getTextFieldText() + "=" + cm.getResult());
        });
	}

	private double newNumber(){
        String s;
        if(operatorIndex != 0) {
            s = cv.getTextFieldText().substring(operatorIndex + 1, cv.getTextFieldText().length());
            System.out.println("Result: " + s);
        } else {
            s = cv.getTextFieldText().substring(0, cv.getTextFieldText().length());
            System.out.println("Result: " + s);
        }
        return Double.parseDouble(s);
    }
}