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/**
Copyright 2013 project Ardulink http://www.ardulink.org/

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


 */

package org.ardulink.gui;

import static org.ardulink.core.Pin.digitalPin;

import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.ImageIcon;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.SwingConstants;

import org.ardulink.gui.facility.IntMinMaxModel;
import org.ardulink.legacy.Link;

import org.ardulink.core.events.DigitalPinValueChangedEvent;
import org.ardulink.core.events.EventListener;
import org.ardulink.core.events.EventListenerAdapter;
import org.ardulink.core.events.FilteredEventListenerAdapter;

/**
 * [ardulinktitle] [ardulinkversion] This class implements the
 * DigitalReadChangeListener interface and is able to listen events coming from
 * arduino board about digital pin state change.
 * 
* project Ardulink http://www.ardulink.org/
 * 
 * [adsense]
 */
public class DigitalPinStatus extends JPanel implements Linkable {

	private static final long serialVersionUID = -7773514191770737230L;

	private JLabel lblStatelabel;
	private JToggleButton tglbtnSensor;
	private JComboBox pinComboBox;
	private IntMinMaxModel pinComboBoxModel;
	private JLabel lblPin;

	private Link link;

	private static final String HIGH = "High";
	private static final String LOW = "Low";

	private static final String HIGH_ICON_NAME = "icons/blue-on-32.png";
	private static final String LOW_ICON_NAME = "icons/blue-off-32.png";

	private static final ImageIcon HIGH_ICON = new ImageIcon(
			DigitalPinStatus.class.getResource(HIGH_ICON_NAME));
	private static final ImageIcon LOW_ICON = new ImageIcon(
			DigitalPinStatus.class.getResource(LOW_ICON_NAME));
	private JPanel comboPanel;

	private EventListener listener;

	private FilteredEventListenerAdapter listener() {
		return new FilteredEventListenerAdapter(digitalPin(pinComboBoxModel
				.getSelectedItem().intValue()), new EventListenerAdapter() {
			@Override
			public void stateChanged(DigitalPinValueChangedEvent event) {
				boolean value = event.getValue().booleanValue();
				lblStatelabel.setText(value ? HIGH : LOW);
				lblStatelabel.setIcon(value ? HIGH_ICON : LOW_ICON);
			}
		});
	}

	/**
	 * Create the panel.
	 */
	public DigitalPinStatus() {
		setLayout(new GridLayout(3, 1, 0, 0));

		lblStatelabel = new JLabel(LOW);
		lblStatelabel.setHorizontalAlignment(SwingConstants.CENTER);
		lblStatelabel.setIcon(LOW_ICON);
		lblStatelabel.setEnabled(false);
		add(lblStatelabel);

		comboPanel = new JPanel();
		add(comboPanel);

		lblPin = new JLabel("Pin:");
		comboPanel.add(lblPin);

		pinComboBoxModel = new IntMinMaxModel(2, 40);
		pinComboBox = new JComboBox(pinComboBoxModel);
		comboPanel.add(pinComboBox);

		tglbtnSensor = new JToggleButton("Sensor off");
		tglbtnSensor.addItemListener(new ItemListener() {

			@Override
			public void itemStateChanged(ItemEvent e) {
				if (e.getStateChange() == ItemEvent.SELECTED) {
					link.addDigitalReadChangeListener((listener = listener()));

					tglbtnSensor.setText("Sensor on");
					pinComboBox.setEnabled(false);

					lblStatelabel.setEnabled(true);

				} else if (e.getStateChange() == ItemEvent.DESELECTED) {
					link.removeDigitalReadChangeListener(listener);

					tglbtnSensor.setText("Sensor off");
					pinComboBox.setEnabled(true);

					lblStatelabel.setEnabled(false);
				}
			}
		});
		add(tglbtnSensor);
	}

	public void setPin(int pin) {
		pinComboBoxModel.setSelectedItem(pin);
	}

	@Override
	public void setLink(Link link) {
		if (this.link != null && listener != null) {
			this.link.removeDigitalReadChangeListener(listener);
		}
		tglbtnSensor.setText("Sensor off");
		pinComboBox.setEnabled(true);

		lblStatelabel.setEnabled(false);
		this.link = link;
	}

}