/*
Oct 23, 2017
 */
package chapter12.exercises.lab12;


import javax.swing.SwingUtilities;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

/**
 *
 * @author banhmisg9509
 */
public class TemperatureConversion extends javax.swing.JFrame {

    private String Unit1;
    private String Unit2;
    private final TemperatureConverter tc;

    /**
     * Creates new form TemperatureConversion
     */
    public TemperatureConversion() {
        initComponents();
        this.Unit1 = (String) cbbTempUnits1.getSelectedItem();
        this.Unit2 = (String) cbbTempUnits2.getSelectedItem();
        this.tc = new TemperatureConverter();
       
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        lbStatus = new javax.swing.JLabel();
        tfLeftResult = new javax.swing.JTextField();
        tfRightResult = new javax.swing.JTextField();
        lbEquals = new javax.swing.JLabel();
        cbbTempUnits1 = new javax.swing.JComboBox<>();
        cbbTempUnits2 = new javax.swing.JComboBox<>();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Temperature Converter");
        setResizable(false);

        lbStatus.setFont(new java.awt.Font("Bitstream Vera Sans Mono", 1, 18)); // NOI18N
        lbStatus.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        lbStatus.setText("Temperature Conversion");

        tfLeftResult.setHorizontalAlignment(javax.swing.JTextField.CENTER);

        tfRightResult.setHorizontalAlignment(javax.swing.JTextField.CENTER);

        lbEquals.setFont(new java.awt.Font("Bitstream Vera Sans", 1, 18)); // NOI18N
        lbEquals.setText("=");

        cbbTempUnits1.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Celsius", "Fahrenheit", "Kelvin" }));
        cbbTempUnits1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbbTempUnits1ActionPerformed(evt);
            }
        });

        cbbTempUnits2.setModel(new javax.swing.DefaultComboBoxModel<>(new String[] { "Fahrenheit", "Celsius", "Kelvin" }));
        cbbTempUnits2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cbbTempUnits2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(38, 38, 38)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(cbbTempUnits1, 0, 111, Short.MAX_VALUE)
                    .addComponent(tfLeftResult))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(lbEquals)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(cbbTempUnits2, 0, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(tfRightResult, javax.swing.GroupLayout.DEFAULT_SIZE, 111, Short.MAX_VALUE))
                .addContainerGap(44, Short.MAX_VALUE))
            .addComponent(lbStatus, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addComponent(lbStatus)
                .addGap(18, 18, 18)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(tfLeftResult, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(tfRightResult, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(lbEquals))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(cbbTempUnits1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(cbbTempUnits2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(24, Short.MAX_VALUE))
        );

        tfLeftResult.getDocument().addDocumentListener(new SimpleDocumentListener() {
            @Override
            public void update(DocumentEvent e) {
                Runnable doUpdate = new Runnable() {
                    @Override
                    public void run() {
                        tfRightResult.setText(tfLeftResult.getText());
                        //tfRightResult.setText(String.format("%.3f", processResult(Unit1, Unit2, tfLeftResult.getText())));
                    }
                };
                SwingUtilities.invokeLater(doUpdate);

            }
        });
        tfRightResult.getDocument().addDocumentListener(new SimpleDocumentListener() {
            @Override
            public void update(DocumentEvent e) {
                Runnable doAssit = new Runnable() {
                    @Override
                    public void run() {
                        tfLeftResult.setText(tfRightResult.getText());
                        //tfLeftResult.setText(String.format("%.3f", processResult(Unit2, Unit1, tfRightResult.getText())));
                    }
                };
                SwingUtilities.invokeLater(doAssit);

            }
        });

        pack();
        setLocationRelativeTo(null);
    }// </editor-fold>                        

    private void cbbTempUnits1ActionPerformed(java.awt.event.ActionEvent evt) {                                              
        this.Unit1 = (String) cbbTempUnits1.getSelectedItem();
    }                                             

    private void cbbTempUnits2ActionPerformed(java.awt.event.ActionEvent evt) {                                              
        this.Unit2 = (String) cbbTempUnits2.getSelectedItem();
    }                                             

    private double processResult(String Unit1, String Unit2, String input) {
        double result = 0.0;
        if (Unit1.equals(Unit2) || input.isEmpty()) {
            return result;
        }
        switch (Unit1) {
            case "Celsius":
                if (Unit2.equals("Fahrenheit")) {
                    result = tc.CelsiusToFahrenheit(tc.ValidateInput(input));
                } else {
                    result = tc.CelsiusToKelvin(tc.ValidateInput(input));
                }
                break;
            case "Fahrenheit":
                if (Unit2.equals("Celsius")) {
                    result = tc.FahrenheitToCelsius(tc.ValidateInput(input));
                } else {
                    result = tc.FahrenheitToKelvin(tc.ValidateInput(input));
                }
                break;
            case "Kelvin":
                if (Unit2.equals("Celsius")) {
                    result = tc.KelvinToCelsius(tc.ValidateInput(input));
                } else {
                    result = tc.KelvinToFahrenheit(tc.ValidateInput(input));
                }
                break;
            default:
                break;
        }
        return result;
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(TemperatureConversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(TemperatureConversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(TemperatureConversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(TemperatureConversion.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new TemperatureConversion().setVisible(true);
            }
        });
    }


    // Variables declaration - do not modify                     
    private javax.swing.JComboBox<String> cbbTempUnits1;
    private javax.swing.JComboBox<String> cbbTempUnits2;
    private javax.swing.JLabel lbEquals;
    private javax.swing.JLabel lbStatus;
    private javax.swing.JTextField tfLeftResult;
    private javax.swing.JTextField tfRightResult;
    // End of variables declaration                   
}

@FunctionalInterface
interface SimpleDocumentListener extends DocumentListener {

    void update(DocumentEvent e);

    @Override
    default void insertUpdate(DocumentEvent e) {
        update(e);
    }

    @Override
    default void removeUpdate(DocumentEvent e) {
        update(e);
    }

    @Override
    default void changedUpdate(DocumentEvent e) {
        update(e);
    }
}