package org.hwo.io.servicelink;

import java.awt.Component;
import java.util.Arrays;

import javax.swing.JCheckBox;
import javax.swing.JPanel;

import org.hwo.io.servicelink.ServiceLink.ServiceNode;
import org.hwo.io.servicelink.ServiceLink.ServiceNode.ServiceNodeRegister;
import java.awt.FlowLayout;
import javax.swing.JScrollPane;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import javax.swing.BoxLayout;

public class BitFieldEditor extends JPanel implements RegisterEditorControl {

	private ServiceNodeRegister serviceNodeRegister;
	
	private JCheckBox[] checkboxes;
	private JScrollPane scrollPane;
	private JPanel pBits;
	
	public BitFieldEditor() {
		GridBagLayout gridBagLayout = new GridBagLayout();
		gridBagLayout.columnWidths = new int[]{0, 0};
		gridBagLayout.rowHeights = new int[]{0, 0};
		gridBagLayout.columnWeights = new double[]{1.0, Double.MIN_VALUE};
		gridBagLayout.rowWeights = new double[]{1.0, Double.MIN_VALUE};
		setLayout(gridBagLayout);
		
		scrollPane = new JScrollPane();
		GridBagConstraints gbc_scrollPane = new GridBagConstraints();
		gbc_scrollPane.fill = GridBagConstraints.BOTH;
		gbc_scrollPane.gridx = 0;
		gbc_scrollPane.gridy = 0;
		add(scrollPane, gbc_scrollPane);
		
		pBits = new JPanel();
		scrollPane.setViewportView(pBits);
		pBits.setLayout(new BoxLayout(pBits, BoxLayout.Y_AXIS));
		
		checkboxes = new JCheckBox[0];
	}
	
	private void initialize()
	{
		for (JCheckBox cb:checkboxes)
		{
			remove(cb);
		}
		
		if (serviceNodeRegister != null)
		{
			checkboxes = new JCheckBox[32];
			for (int i=0;i<32;i++)
			{
				if (serviceNodeRegister.getBitField().getLabels()[i]!=null)
				{
					checkboxes[i] = new JCheckBox();
					checkboxes[i].setText(serviceNodeRegister.getBitField().getLabels()[i]);
					
					pBits.add(checkboxes[i]);
				};
			}
			synchronize();
		}
		invalidate();
	}
	
	public void synchronize()
	{
		for (int i=0;i<32;i++)
		{
			if (checkboxes[i]!=null)
				checkboxes[i].setSelected(
						(serviceNodeRegister.getIntValue() & (1<<i))!=0
						);
		}
	}

	@Override
	public void setRegister(ServiceNodeRegister serviceNodeRegister) {
		setServiceNodeRegister(serviceNodeRegister);
	}

	@Override
	public void updateRegister() {
		Integer v = serviceNodeRegister.getIntValue();
		
		for (int i=0;i<32;i++)
		{
			if (checkboxes[i]!=null)
			{
				if (checkboxes[i].isSelected())
					v |= 1<<i;
				else
					v &= ~(1<<i);
			}
		}
		serviceNodeRegister.setIntValue(v);
		
	}

	@Override
	public Component getComponent() {
		return this;
	}

	public ServiceNodeRegister getServiceNodeRegister() {
		return serviceNodeRegister;
	}

	public void setServiceNodeRegister(ServiceNodeRegister serviceNodeRegister) {
		this.serviceNodeRegister = serviceNodeRegister;
		initialize();
	}

}