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package horstmann.ch05_mailgui;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;

/**
   Presents a phone GUI for the voice mail system.
 */
public class Telephone
{
  /**
      Constructs a telephone with a speaker, keypad,
      and microphone.
   */
  public Telephone()
  {
    JPanel speakerPanel = new JPanel();
    speakerPanel.setLayout(new BorderLayout());
    speakerPanel.add(new JLabel("Speaker:"),
        BorderLayout.NORTH);
    speakerField = new JTextArea(10, 25);
    speakerPanel.add(speakerField,
        BorderLayout.CENTER);

    String keyLabels = "123456789*0#";
    JPanel keyPanel = new JPanel();
    keyPanel.setLayout(new GridLayout(4, 3));
    for (int i = 0; i < keyLabels.length(); i++)
    {
      final String label = keyLabels.substring(i, i + 1);
      JButton keyButton = new JButton(label);
      keyPanel.add(keyButton);
      keyButton.addActionListener(event -> connect.dial(label));
    }

    final JTextArea microphoneField = new JTextArea(10,25);

    JButton speechButton = new JButton("Send speech");
    speechButton.addActionListener(event -> {
      connect.record(microphoneField.getText());
      microphoneField.setText("");
    });

    JButton hangupButton = new JButton("Hangup");
    hangupButton.addActionListener(event -> connect.hangup());

    JPanel buttonPanel = new JPanel();
    buttonPanel.add(speechButton);
    buttonPanel.add(hangupButton);

    JPanel microphonePanel = new JPanel();
    microphonePanel.setLayout(new BorderLayout());
    microphonePanel.add(new JLabel("Microphone:"),
        BorderLayout.NORTH);
    microphonePanel.add(microphoneField, BorderLayout.CENTER);
    microphonePanel.add(buttonPanel, BorderLayout.SOUTH);

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(speakerPanel, BorderLayout.NORTH);
    frame.add(keyPanel, BorderLayout.CENTER);
    frame.add(microphonePanel, BorderLayout.SOUTH);

    frame.pack();
    frame.setVisible(true);
  }

  /**
      Give instructions to the mail system user.
   */
  public void speak(String output)
  {
    speakerField.setText(output);
  }

  public void run(Connection c)
  {
    connect = c;
  }

  private JTextArea speakerField;
  private Connection connect;
}