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package javafxcalcuator;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;

/**
 *
 * @author
 */
public class CalculatorFXMLDocumentController implements Initializable {

    @FXML
    private TextField textField;

    @FXML
    private void handleOneButtonAction(ActionEvent event) {
        //add "1" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("1");
        } else {
            String current = textField.getText();
            textField.setText(current + "1");
        }
    }

    @FXML
    private void handleTwoButtonAction(ActionEvent event) {
        //add "2" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("2");
        } else {
            String current = textField.getText();
            textField.setText(current + "2");
        }
    }

    @FXML
    private void handleThreeButtonAction(ActionEvent event) {
        //add "3" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("3");
        } else {
            String current = textField.getText();
            textField.setText(current + "3");
        }
    }

    @FXML
    private void handleFourButtonAction(ActionEvent event) {
        //add "4" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("4");
        } else {
            String current = textField.getText();
            textField.setText(current + "4");
        }
    }

    @FXML
    private void handleFiveButtonAction(ActionEvent event) {
        //add "5" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("5");
        } else {
            String current = textField.getText();
            textField.setText(current + "5");
        }
    }

    @FXML
    private void handleSixButtonAction(ActionEvent event) {
        //add "6" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("6");
        } else {
            String current = textField.getText();
            textField.setText(current + "6");
        }
    }

    @FXML
    private void handleSevenButtonAction(ActionEvent event) {
        //add "7" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("7");
        } else {
            String current = textField.getText();
            textField.setText(current + "7");
        }
    }

    @FXML
    private void handleEightButtonAction(ActionEvent event) {
        //add "8" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("8");
        } else {
            String current = textField.getText();
            textField.setText(current + "8"
                    + "");
        }
    }

    @FXML
    private void handleNineButtonAction(ActionEvent event) {
        //add "9" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText("9");
        } else {
            String current = textField.getText();
            textField.setText(current + "9");
        }
    }

    @FXML
    private void handleDecimalButtonAction(ActionEvent event) {
        //add "2" to the text field
        if(textField.getText().equals("") ) { //text field is emtpy
            textField.setText(".");
        } else {
            String current = textField.getText();
            textField.setText(current + ".");
        }
    }

    @FXML
    private void handlePlusButtonAction(ActionEvent event) {
        //add "+" to the text field
        if (! (textField.getText().equals("")) ) { //if textfield is not empty
            String current = textField.getText();
            textField.setText(current + " + ");
        }
    }

    @FXML
    private void handleMinusButtonAction(ActionEvent event) {
        //add "+" to the text field
        if (! (textField.getText().equals("")) ) { //if textfield is not empty
            String current = textField.getText();
            textField.setText(current + " - ");
        }
    }

    @FXML
    private void handleTimesButtonAction(ActionEvent event) {
        //add "+" to the text field
        if (! (textField.getText().equals("")) ) { //if textfield is not empty
            String current = textField.getText();
            textField.setText(current + " * ");
        }
    }

    @FXML
    private void handleDivisonButtonAction(ActionEvent event) {
        //add "+" to the text field
        if (! (textField.getText().equals("")) ) { //if textfield is not empty
            String current = textField.getText();
            textField.setText(current + " / ");
        }
    }

    @FXML
    private void handleEqualButtonAction(ActionEvent event) {
        //retrieve operands and operator
        String formula = textField.getText();

        int firstSpace = formula.indexOf(" ");
        int secondSpace = firstSpace + 2;

        double leftOperand = Double.parseDouble(formula.substring(0, firstSpace) );
        double rightOperand = Double.parseDouble(formula.substring(secondSpace+1) );
        char operator = formula.charAt(firstSpace + 1);

        //calculate the result
        double result = 0;
        if (operator == '+') {
            result = leftOperand + rightOperand;
        }

        //show the result
        textField.setText("" + result);

    }

    @FXML
    private void handleTextFieldButtonAction(ActionEvent event) {
        handleEqualButtonAction(event);
    }

    @FXML
    private void handleClearButtonAction(ActionEvent event) {
        textField.setText("");
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }

}