/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.demo.gui;
   
   import java.awt.BorderLayout;
   
   import javax.swing.JLabel;
  import javax.swing.JScrollPane;
  import javax.swing.JTextArea;
  import javax.swing.ScrollPaneConstants;
  import javax.swing.Timer;
  import javax.swing.text.DefaultCaret;
  
  import oshi.SystemInfo;
  import oshi.hardware.HardwareAbstractionLayer;
  import oshi.hardware.UsbDevice;
  
  /**
   * Shows USB devices. Simply prints OSHI's output in a scrollable pane.
   */
  public class UsbPanel extends OshiJPanel { // NOSONAR squid:S110
  
      private static final long serialVersionUID = 1L;
  
      private static final String USB_DEVICES = "USB Devices";
  
      public UsbPanel(SystemInfo si) {
          super();
          init(si.getHardware());
      }
  
      private void init(HardwareAbstractionLayer hal) {
  
          JLabel usb = new JLabel(USB_DEVICES);
          add(usb, BorderLayout.NORTH);
          JTextArea usbArea = new JTextArea(60, 20);
          JScrollPane scrollV = new JScrollPane(usbArea);
          scrollV.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
          DefaultCaret caret = (DefaultCaret) usbArea.getCaret();
          caret.setUpdatePolicy(DefaultCaret.NEVER_UPDATE);
  
          usbArea.setText(getUsbString(hal));
          add(scrollV, BorderLayout.CENTER);
  
          Timer timer = new Timer(Config.REFRESH_SLOW, e -> usbArea.setText(getUsbString(hal)));
          timer.start();
      }
  
      private static String getUsbString(HardwareAbstractionLayer hal) {
          StringBuilder sb = new StringBuilder();
          boolean first = true;
          for (UsbDevice usbDevice : hal.getUsbDevices(true)) {
              if (first) {
                  first = false;
              } else {
                  sb.append('\n');
              }
              sb.append(String.valueOf(usbDevice));
          }
          return sb.toString();
      }
  
  }